-/*
- * apply.c
- *
- * Copyright (C) Linus Torvalds, 2005
- *
- * This applies patches on top of some (arbitrary) version of the SCM.
- *
- */
-#include <fnmatch.h>
#include "cache.h"
-#include "cache-tree.h"
-#include "quote.h"
-#include "blob.h"
-#include "delta.h"
+#include "lockfile.h"
+#include "apply.h"
-// --check turns on checking that the working tree matches the
-// files that are being modified, but doesn't apply the patch
-// --stat does just a diffstat, and doesn't actually apply
-// --numstat does numeric diffstat, and doesn't actually apply
-// --index-info shows the old and new index info for paths if available.
-// --index updates the cache as well.
-// --cached updates only the cache without ever touching the working tree.
-//
-static const char *prefix;
-static int prefix_length = -1;
-static int newfd = -1;
-
-static int p_value = 1;
-static int allow_binary_replacement = 0;
-static int check_index = 0;
-static int write_index = 0;
-static int cached = 0;
-static int diffstat = 0;
-static int numstat = 0;
-static int summary = 0;
-static int check = 0;
-static int apply = 1;
-static int no_add = 0;
-static int show_index_info = 0;
-static int line_termination = '\n';
-static unsigned long p_context = -1;
-static const char apply_usage[] =
-"git-apply [--stat] [--numstat] [--summary] [--check] [--index] [--cached] [--apply] [--no-add] [--index-info] [--allow-binary-replacement] [-z] [-pNUM] [-CNUM] [--whitespace=<nowarn|warn|error|error-all|strip>] <patch>...";
-
-static enum whitespace_eol {
- nowarn_whitespace,
- warn_on_whitespace,
- error_on_whitespace,
- strip_whitespace,
-} new_whitespace = warn_on_whitespace;
-static int whitespace_error = 0;
-static int squelch_whitespace_errors = 5;
-static int applied_after_stripping = 0;
-static const char *patch_input_file = NULL;
+static void git_apply_config(void)
+{
+ git_config_get_string_const("apply.whitespace", &apply_default_whitespace);
+ git_config_get_string_const("apply.ignorewhitespace", &apply_default_ignorewhitespace);
+ git_config(git_default_config, NULL);
+}
-static void parse_whitespace_option(const char *option)
+int parse_whitespace_option(struct apply_state *state, const char *option)
{
if (!option) {
- new_whitespace = warn_on_whitespace;
- return;
+ state->ws_error_action = warn_on_ws_error;
+ return 0;
}
if (!strcmp(option, "warn")) {
- new_whitespace = warn_on_whitespace;
- return;
+ state->ws_error_action = warn_on_ws_error;
+ return 0;
}
if (!strcmp(option, "nowarn")) {
- new_whitespace = nowarn_whitespace;
- return;
+ state->ws_error_action = nowarn_ws_error;
+ return 0;
}
if (!strcmp(option, "error")) {
- new_whitespace = error_on_whitespace;
- return;
+ state->ws_error_action = die_on_ws_error;
+ return 0;
}
if (!strcmp(option, "error-all")) {
- new_whitespace = error_on_whitespace;
- squelch_whitespace_errors = 0;
- return;
- }
- if (!strcmp(option, "strip")) {
- new_whitespace = strip_whitespace;
- return;
- }
- die("unrecognized whitespace option '%s'", option);
-}
-
-static void set_default_whitespace_mode(const char *whitespace_option)
-{
- if (!whitespace_option && !apply_default_whitespace) {
- new_whitespace = (apply
- ? warn_on_whitespace
- : nowarn_whitespace);
- }
-}
-
-/*
- * For "diff-stat" like behaviour, we keep track of the biggest change
- * we've seen, and the longest filename. That allows us to do simple
- * scaling.
- */
-static int max_change, max_len;
-
-/*
- * Various "current state", notably line numbers and what
- * file (and how) we're patching right now.. The "is_xxxx"
- * things are flags, where -1 means "don't know yet".
- */
-static int linenr = 1;
-
-struct fragment {
- unsigned long leading, trailing;
- unsigned long oldpos, oldlines;
- unsigned long newpos, newlines;
- const char *patch;
- int size;
- struct fragment *next;
-};
-
-struct patch {
- char *new_name, *old_name, *def_name;
- unsigned int old_mode, new_mode;
- int is_rename, is_copy, is_new, is_delete, is_binary;
-#define BINARY_DELTA_DEFLATED 1
-#define BINARY_LITERAL_DEFLATED 2
- unsigned long deflate_origlen;
- int lines_added, lines_deleted;
- int score;
- struct fragment *fragments;
- char *result;
- unsigned long resultsize;
- char old_sha1_prefix[41];
- char new_sha1_prefix[41];
- struct patch *next;
-};
-
-#define CHUNKSIZE (8192)
-#define SLOP (16)
-
-static void *read_patch_file(int fd, unsigned long *sizep)
-{
- unsigned long size = 0, alloc = CHUNKSIZE;
- void *buffer = xmalloc(alloc);
-
- for (;;) {
- int nr = alloc - size;
- if (nr < 1024) {
- alloc += CHUNKSIZE;
- buffer = xrealloc(buffer, alloc);
- nr = alloc - size;
- }
- nr = xread(fd, buffer + size, nr);
- if (!nr)
- break;
- if (nr < 0)
- die("git-apply: read returned %s", strerror(errno));
- size += nr;
- }
- *sizep = size;
-
- /*
- * Make sure that we have some slop in the buffer
- * so that we can do speculative "memcmp" etc, and
- * see to it that it is NUL-filled.
- */
- if (alloc < size + SLOP)
- buffer = xrealloc(buffer, size + SLOP);
- memset(buffer + size, 0, SLOP);
- return buffer;
-}
-
-static unsigned long linelen(const char *buffer, unsigned long size)
-{
- unsigned long len = 0;
- while (size--) {
- len++;
- if (*buffer++ == '\n')
- break;
- }
- return len;
-}
-
-static int is_dev_null(const char *str)
-{
- return !memcmp("/dev/null", str, 9) && isspace(str[9]);
-}
-
-#define TERM_SPACE 1
-#define TERM_TAB 2
-
-static int name_terminate(const char *name, int namelen, int c, int terminate)
-{
- if (c == ' ' && !(terminate & TERM_SPACE))
+ state->ws_error_action = die_on_ws_error;
+ state->squelch_whitespace_errors = 0;
return 0;
- if (c == '\t' && !(terminate & TERM_TAB))
- return 0;
-
- return 1;
-}
-
-static char * find_name(const char *line, char *def, int p_value, int terminate)
-{
- int len;
- const char *start = line;
- char *name;
-
- if (*line == '"') {
- /* Proposed "new-style" GNU patch/diff format; see
- * http://marc.theaimsgroup.com/?l=git&m=112927316408690&w=2
- */
- name = unquote_c_style(line, NULL);
- if (name) {
- char *cp = name;
- while (p_value) {
- cp = strchr(name, '/');
- if (!cp)
- break;
- cp++;
- p_value--;
- }
- if (cp) {
- /* name can later be freed, so we need
- * to memmove, not just return cp
- */
- memmove(name, cp, strlen(cp) + 1);
- free(def);
- return name;
- }
- else {
- free(name);
- name = NULL;
- }
- }
- }
-
- for (;;) {
- char c = *line;
-
- if (isspace(c)) {
- if (c == '\n')
- break;
- if (name_terminate(start, line-start, c, terminate))
- break;
- }
- line++;
- if (c == '/' && !--p_value)
- start = line;
- }
- if (!start)
- return def;
- len = line - start;
- if (!len)
- return def;
-
- /*
- * Generally we prefer the shorter name, especially
- * if the other one is just a variation of that with
- * something else tacked on to the end (ie "file.orig"
- * or "file~").
- */
- if (def) {
- int deflen = strlen(def);
- if (deflen < len && !strncmp(start, def, deflen))
- return def;
- }
-
- name = xmalloc(len + 1);
- memcpy(name, start, len);
- name[len] = 0;
- free(def);
- return name;
-}
-
-/*
- * Get the name etc info from the --/+++ lines of a traditional patch header
- *
- * NOTE! This hardcodes "-p1" behaviour in filename detection.
- *
- * FIXME! The end-of-filename heuristics are kind of screwy. For existing
- * files, we can happily check the index for a match, but for creating a
- * new file we should try to match whatever "patch" does. I have no idea.
- */
-static void parse_traditional_patch(const char *first, const char *second, struct patch *patch)
-{
- char *name;
-
- first += 4; // skip "--- "
- second += 4; // skip "+++ "
- if (is_dev_null(first)) {
- patch->is_new = 1;
- patch->is_delete = 0;
- name = find_name(second, NULL, p_value, TERM_SPACE | TERM_TAB);
- patch->new_name = name;
- } else if (is_dev_null(second)) {
- patch->is_new = 0;
- patch->is_delete = 1;
- name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
- patch->old_name = name;
- } else {
- name = find_name(first, NULL, p_value, TERM_SPACE | TERM_TAB);
- name = find_name(second, name, p_value, TERM_SPACE | TERM_TAB);
- patch->old_name = patch->new_name = name;
- }
- if (!name)
- die("unable to find filename in patch at line %d", linenr);
-}
-
-static int gitdiff_hdrend(const char *line, struct patch *patch)
-{
- return -1;
-}
-
-/*
- * We're anal about diff header consistency, to make
- * sure that we don't end up having strange ambiguous
- * patches floating around.
- *
- * As a result, gitdiff_{old|new}name() will check
- * their names against any previous information, just
- * to make sure..
- */
-static char *gitdiff_verify_name(const char *line, int isnull, char *orig_name, const char *oldnew)
-{
- if (!orig_name && !isnull)
- return find_name(line, NULL, 1, 0);
-
- if (orig_name) {
- int len;
- const char *name;
- char *another;
- name = orig_name;
- len = strlen(name);
- if (isnull)
- die("git-apply: bad git-diff - expected /dev/null, got %s on line %d", name, linenr);
- another = find_name(line, NULL, 1, 0);
- if (!another || memcmp(another, name, len))
- die("git-apply: bad git-diff - inconsistent %s filename on line %d", oldnew, linenr);
- free(another);
- return orig_name;
- }
- else {
- /* expect "/dev/null" */
- if (memcmp("/dev/null", line, 9) || line[9] != '\n')
- die("git-apply: bad git-diff - expected /dev/null on line %d", linenr);
- return NULL;
}
-}
-
-static int gitdiff_oldname(const char *line, struct patch *patch)
-{
- patch->old_name = gitdiff_verify_name(line, patch->is_new, patch->old_name, "old");
- return 0;
-}
-
-static int gitdiff_newname(const char *line, struct patch *patch)
-{
- patch->new_name = gitdiff_verify_name(line, patch->is_delete, patch->new_name, "new");
- return 0;
-}
-
-static int gitdiff_oldmode(const char *line, struct patch *patch)
-{
- patch->old_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_newmode(const char *line, struct patch *patch)
-{
- patch->new_mode = strtoul(line, NULL, 8);
- return 0;
-}
-
-static int gitdiff_delete(const char *line, struct patch *patch)
-{
- patch->is_delete = 1;
- patch->old_name = patch->def_name;
- return gitdiff_oldmode(line, patch);
-}
-
-static int gitdiff_newfile(const char *line, struct patch *patch)
-{
- patch->is_new = 1;
- patch->new_name = patch->def_name;
- return gitdiff_newmode(line, patch);
-}
-
-static int gitdiff_copysrc(const char *line, struct patch *patch)
-{
- patch->is_copy = 1;
- patch->old_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_copydst(const char *line, struct patch *patch)
-{
- patch->is_copy = 1;
- patch->new_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_renamesrc(const char *line, struct patch *patch)
-{
- patch->is_rename = 1;
- patch->old_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_renamedst(const char *line, struct patch *patch)
-{
- patch->is_rename = 1;
- patch->new_name = find_name(line, NULL, 0, 0);
- return 0;
-}
-
-static int gitdiff_similarity(const char *line, struct patch *patch)
-{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
- return 0;
-}
-
-static int gitdiff_dissimilarity(const char *line, struct patch *patch)
-{
- if ((patch->score = strtoul(line, NULL, 10)) == ULONG_MAX)
- patch->score = 0;
- return 0;
-}
-
-static int gitdiff_index(const char *line, struct patch *patch)
-{
- /* index line is N hexadecimal, "..", N hexadecimal,
- * and optional space with octal mode.
- */
- const char *ptr, *eol;
- int len;
-
- ptr = strchr(line, '.');
- if (!ptr || ptr[1] != '.' || 40 < ptr - line)
+ if (!strcmp(option, "strip") || !strcmp(option, "fix")) {
+ state->ws_error_action = correct_ws_error;
return 0;
- len = ptr - line;
- memcpy(patch->old_sha1_prefix, line, len);
- patch->old_sha1_prefix[len] = 0;
-
- line = ptr + 2;
- ptr = strchr(line, ' ');
- eol = strchr(line, '\n');
-
- if (!ptr || eol < ptr)
- ptr = eol;
- len = ptr - line;
-
- if (40 < len)
- return 0;
- memcpy(patch->new_sha1_prefix, line, len);
- patch->new_sha1_prefix[len] = 0;
- if (*ptr == ' ')
- patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8);
- return 0;
-}
-
-/*
- * This is normal for a diff that doesn't change anything: we'll fall through
- * into the next diff. Tell the parser to break out.
- */
-static int gitdiff_unrecognized(const char *line, struct patch *patch)
-{
- return -1;
-}
-
-static const char *stop_at_slash(const char *line, int llen)
-{
- int i;
-
- for (i = 0; i < llen; i++) {
- int ch = line[i];
- if (ch == '/')
- return line + i;
- }
- return NULL;
-}
-
-/* This is to extract the same name that appears on "diff --git"
- * line. We do not find and return anything if it is a rename
- * patch, and it is OK because we will find the name elsewhere.
- * We need to reliably find name only when it is mode-change only,
- * creation or deletion of an empty file. In any of these cases,
- * both sides are the same name under a/ and b/ respectively.
- */
-static char *git_header_name(char *line, int llen)
-{
- int len;
- const char *name;
- const char *second = NULL;
-
- line += strlen("diff --git ");
- llen -= strlen("diff --git ");
-
- if (*line == '"') {
- const char *cp;
- char *first = unquote_c_style(line, &second);
- if (!first)
- return NULL;
-
- /* advance to the first slash */
- cp = stop_at_slash(first, strlen(first));
- if (!cp || cp == first) {
- /* we do not accept absolute paths */
- free_first_and_fail:
- free(first);
- return NULL;
- }
- len = strlen(cp+1);
- memmove(first, cp+1, len+1); /* including NUL */
-
- /* second points at one past closing dq of name.
- * find the second name.
- */
- while ((second < line + llen) && isspace(*second))
- second++;
-
- if (line + llen <= second)
- goto free_first_and_fail;
- if (*second == '"') {
- char *sp = unquote_c_style(second, NULL);
- if (!sp)
- goto free_first_and_fail;
- cp = stop_at_slash(sp, strlen(sp));
- if (!cp || cp == sp) {
- free_both_and_fail:
- free(sp);
- goto free_first_and_fail;
- }
- /* They must match, otherwise ignore */
- if (strcmp(cp+1, first))
- goto free_both_and_fail;
- free(sp);
- return first;
- }
-
- /* unquoted second */
- cp = stop_at_slash(second, line + llen - second);
- if (!cp || cp == second)
- goto free_first_and_fail;
- cp++;
- if (line + llen - cp != len + 1 ||
- memcmp(first, cp, len))
- goto free_first_and_fail;
- return first;
- }
-
- /* unquoted first name */
- name = stop_at_slash(line, llen);
- if (!name || name == line)
- return NULL;
-
- name++;
-
- /* since the first name is unquoted, a dq if exists must be
- * the beginning of the second name.
- */
- for (second = name; second < line + llen; second++) {
- if (*second == '"') {
- const char *cp = second;
- const char *np;
- char *sp = unquote_c_style(second, NULL);
-
- if (!sp)
- return NULL;
- np = stop_at_slash(sp, strlen(sp));
- if (!np || np == sp) {
- free_second_and_fail:
- free(sp);
- return NULL;
- }
- np++;
- len = strlen(np);
- if (len < cp - name &&
- !strncmp(np, name, len) &&
- isspace(name[len])) {
- /* Good */
- memmove(sp, np, len + 1);
- return sp;
- }
- goto free_second_and_fail;
- }
- }
-
- /*
- * Accept a name only if it shows up twice, exactly the same
- * form.
- */
- for (len = 0 ; ; len++) {
- char c = name[len];
-
- switch (c) {
- default:
- continue;
- case '\n':
- return NULL;
- case '\t': case ' ':
- second = name+len;
- for (;;) {
- char c = *second++;
- if (c == '\n')
- return NULL;
- if (c == '/')
- break;
- }
- if (second[len] == '\n' && !memcmp(name, second, len)) {
- char *ret = xmalloc(len + 1);
- memcpy(ret, name, len);
- ret[len] = 0;
- return ret;
- }
- }
- }
- return NULL;
-}
-
-/* Verify that we recognize the lines following a git header */
-static int parse_git_header(char *line, int len, unsigned int size, struct patch *patch)
-{
- unsigned long offset;
-
- /* A git diff has explicit new/delete information, so we don't guess */
- patch->is_new = 0;
- patch->is_delete = 0;
-
- /*
- * Some things may not have the old name in the
- * rest of the headers anywhere (pure mode changes,
- * or removing or adding empty files), so we get
- * the default name from the header.
- */
- patch->def_name = git_header_name(line, len);
-
- line += len;
- size -= len;
- linenr++;
- for (offset = len ; size > 0 ; offset += len, size -= len, line += len, linenr++) {
- static const struct opentry {
- const char *str;
- int (*fn)(const char *, struct patch *);
- } optable[] = {
- { "@@ -", gitdiff_hdrend },
- { "--- ", gitdiff_oldname },
- { "+++ ", gitdiff_newname },
- { "old mode ", gitdiff_oldmode },
- { "new mode ", gitdiff_newmode },
- { "deleted file mode ", gitdiff_delete },
- { "new file mode ", gitdiff_newfile },
- { "copy from ", gitdiff_copysrc },
- { "copy to ", gitdiff_copydst },
- { "rename old ", gitdiff_renamesrc },
- { "rename new ", gitdiff_renamedst },
- { "rename from ", gitdiff_renamesrc },
- { "rename to ", gitdiff_renamedst },
- { "similarity index ", gitdiff_similarity },
- { "dissimilarity index ", gitdiff_dissimilarity },
- { "index ", gitdiff_index },
- { "", gitdiff_unrecognized },
- };
- int i;
-
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- break;
- for (i = 0; i < ARRAY_SIZE(optable); i++) {
- const struct opentry *p = optable + i;
- int oplen = strlen(p->str);
- if (len < oplen || memcmp(p->str, line, oplen))
- continue;
- if (p->fn(line + oplen, patch) < 0)
- return offset;
- break;
- }
}
-
- return offset;
+ return error(_("unrecognized whitespace option '%s'"), option);
}
-static int parse_num(const char *line, unsigned long *p)
+int parse_ignorewhitespace_option(struct apply_state *state,
+ const char *option)
{
- char *ptr;
-
- if (!isdigit(*line))
+ if (!option || !strcmp(option, "no") ||
+ !strcmp(option, "false") || !strcmp(option, "never") ||
+ !strcmp(option, "none")) {
+ state->ws_ignore_action = ignore_ws_none;
return 0;
- *p = strtoul(line, &ptr, 10);
- return ptr - line;
-}
-
-static int parse_range(const char *line, int len, int offset, const char *expect,
- unsigned long *p1, unsigned long *p2)
-{
- int digits, ex;
-
- if (offset < 0 || offset >= len)
- return -1;
- line += offset;
- len -= offset;
-
- digits = parse_num(line, p1);
- if (!digits)
- return -1;
-
- offset += digits;
- line += digits;
- len -= digits;
-
- *p2 = 1;
- if (*line == ',') {
- digits = parse_num(line+1, p2);
- if (!digits)
- return -1;
-
- offset += digits+1;
- line += digits+1;
- len -= digits+1;
- }
-
- ex = strlen(expect);
- if (ex > len)
- return -1;
- if (memcmp(line, expect, ex))
- return -1;
-
- return offset + ex;
-}
-
-/*
- * Parse a unified diff fragment header of the
- * form "@@ -a,b +c,d @@"
- */
-static int parse_fragment_header(char *line, int len, struct fragment *fragment)
-{
- int offset;
-
- if (!len || line[len-1] != '\n')
- return -1;
-
- /* Figure out the number of lines in a fragment */
- offset = parse_range(line, len, 4, " +", &fragment->oldpos, &fragment->oldlines);
- offset = parse_range(line, len, offset, " @@", &fragment->newpos, &fragment->newlines);
-
- return offset;
-}
-
-static int find_header(char *line, unsigned long size, int *hdrsize, struct patch *patch)
-{
- unsigned long offset, len;
-
- patch->is_rename = patch->is_copy = 0;
- patch->is_new = patch->is_delete = -1;
- patch->old_mode = patch->new_mode = 0;
- patch->old_name = patch->new_name = NULL;
- for (offset = 0; size > 0; offset += len, size -= len, line += len, linenr++) {
- unsigned long nextlen;
-
- len = linelen(line, size);
- if (!len)
- break;
-
- /* Testing this early allows us to take a few shortcuts.. */
- if (len < 6)
- continue;
-
- /*
- * Make sure we don't find any unconnected patch fragmants.
- * That's a sign that we didn't find a header, and that a
- * patch has become corrupted/broken up.
- */
- if (!memcmp("@@ -", line, 4)) {
- struct fragment dummy;
- if (parse_fragment_header(line, len, &dummy) < 0)
- continue;
- error("patch fragment without header at line %d: %.*s", linenr, (int)len-1, line);
- }
-
- if (size < len + 6)
- break;
-
- /*
- * Git patch? It might not have a real patch, just a rename
- * or mode change, so we handle that specially
- */
- if (!memcmp("diff --git ", line, 11)) {
- int git_hdr_len = parse_git_header(line, len, size, patch);
- if (git_hdr_len <= len)
- continue;
- if (!patch->old_name && !patch->new_name) {
- if (!patch->def_name)
- die("git diff header lacks filename information (line %d)", linenr);
- patch->old_name = patch->new_name = patch->def_name;
- }
- *hdrsize = git_hdr_len;
- return offset;
- }
-
- /** --- followed by +++ ? */
- if (memcmp("--- ", line, 4) || memcmp("+++ ", line + len, 4))
- continue;
-
- /*
- * We only accept unified patches, so we want it to
- * at least have "@@ -a,b +c,d @@\n", which is 14 chars
- * minimum
- */
- nextlen = linelen(line + len, size - len);
- if (size < nextlen + 14 || memcmp("@@ -", line + len + nextlen, 4))
- continue;
-
- /* Ok, we'll consider it a patch */
- parse_traditional_patch(line, line+len, patch);
- *hdrsize = len + nextlen;
- linenr += 2;
- return offset;
- }
- return -1;
-}
-
-/*
- * Parse a unified diff. Note that this really needs
- * to parse each fragment separately, since the only
- * way to know the difference between a "---" that is
- * part of a patch, and a "---" that starts the next
- * patch is to look at the line counts..
- */
-static int parse_fragment(char *line, unsigned long size, struct patch *patch, struct fragment *fragment)
-{
- int added, deleted;
- int len = linelen(line, size), offset;
- unsigned long oldlines, newlines;
- unsigned long leading, trailing;
-
- offset = parse_fragment_header(line, len, fragment);
- if (offset < 0)
- return -1;
- oldlines = fragment->oldlines;
- newlines = fragment->newlines;
- leading = 0;
- trailing = 0;
-
- if (patch->is_new < 0) {
- patch->is_new = !oldlines;
- if (!oldlines)
- patch->old_name = NULL;
- }
- if (patch->is_delete < 0) {
- patch->is_delete = !newlines;
- if (!newlines)
- patch->new_name = NULL;
- }
-
- if (patch->is_new && oldlines)
- return error("new file depends on old contents");
- if (patch->is_delete != !newlines) {
- if (newlines)
- return error("deleted file still has contents");
- fprintf(stderr, "** warning: file %s becomes empty but is not deleted\n", patch->new_name);
- }
-
- /* Parse the thing.. */
- line += len;
- size -= len;
- linenr++;
- added = deleted = 0;
- for (offset = len; size > 0; offset += len, size -= len, line += len, linenr++) {
- if (!oldlines && !newlines)
- break;
- len = linelen(line, size);
- if (!len || line[len-1] != '\n')
- return -1;
- switch (*line) {
- default:
- return -1;
- case ' ':
- oldlines--;
- newlines--;
- if (!deleted && !added)
- leading++;
- trailing++;
- break;
- case '-':
- deleted++;
- oldlines--;
- trailing = 0;
- break;
- case '+':
- /*
- * We know len is at least two, since we have a '+' and
- * we checked that the last character was a '\n' above.
- * That is, an addition of an empty line would check
- * the '+' here. Sneaky...
- */
- if ((new_whitespace != nowarn_whitespace) &&
- isspace(line[len-2])) {
- whitespace_error++;
- if (squelch_whitespace_errors &&
- squelch_whitespace_errors <
- whitespace_error)
- ;
- else {
- fprintf(stderr, "Adds trailing whitespace.\n%s:%d:%.*s\n",
- patch_input_file,
- linenr, len-2, line+1);
- }
- }
- added++;
- newlines--;
- trailing = 0;
- break;
-
- /* We allow "\ No newline at end of file". Depending
- * on locale settings when the patch was produced we
- * don't know what this line looks like. The only
- * thing we do know is that it begins with "\ ".
- * Checking for 12 is just for sanity check -- any
- * l10n of "\ No newline..." is at least that long.
- */
- case '\\':
- if (len < 12 || memcmp(line, "\\ ", 2))
- return -1;
- break;
- }
- }
- if (oldlines || newlines)
- return -1;
- fragment->leading = leading;
- fragment->trailing = trailing;
-
- /* If a fragment ends with an incomplete line, we failed to include
- * it in the above loop because we hit oldlines == newlines == 0
- * before seeing it.
- */
- if (12 < size && !memcmp(line, "\\ ", 2))
- offset += linelen(line, size);
-
- patch->lines_added += added;
- patch->lines_deleted += deleted;
- return offset;
-}
-
-static int parse_single_patch(char *line, unsigned long size, struct patch *patch)
-{
- unsigned long offset = 0;
- struct fragment **fragp = &patch->fragments;
-
- while (size > 4 && !memcmp(line, "@@ -", 4)) {
- struct fragment *fragment;
- int len;
-
- fragment = xcalloc(1, sizeof(*fragment));
- len = parse_fragment(line, size, patch, fragment);
- if (len <= 0)
- die("corrupt patch at line %d", linenr);
-
- fragment->patch = line;
- fragment->size = len;
-
- *fragp = fragment;
- fragp = &fragment->next;
-
- offset += len;
- line += len;
- size -= len;
- }
- return offset;
-}
-
-static inline int metadata_changes(struct patch *patch)
-{
- return patch->is_rename > 0 ||
- patch->is_copy > 0 ||
- patch->is_new > 0 ||
- patch->is_delete ||
- (patch->old_mode && patch->new_mode &&
- patch->old_mode != patch->new_mode);
-}
-
-static int parse_binary(char *buffer, unsigned long size, struct patch *patch)
-{
- /* We have read "GIT binary patch\n"; what follows is a line
- * that says the patch method (currently, either "deflated
- * literal" or "deflated delta") and the length of data before
- * deflating; a sequence of 'length-byte' followed by base-85
- * encoded data follows.
- *
- * Each 5-byte sequence of base-85 encodes up to 4 bytes,
- * and we would limit the patch line to 66 characters,
- * so one line can fit up to 13 groups that would decode
- * to 52 bytes max. The length byte 'A'-'Z' corresponds
- * to 1-26 bytes, and 'a'-'z' corresponds to 27-52 bytes.
- * The end of binary is signalled with an empty line.
- */
- int llen, used;
- struct fragment *fragment;
- char *data = NULL;
-
- patch->fragments = fragment = xcalloc(1, sizeof(*fragment));
-
- /* Grab the type of patch */
- llen = linelen(buffer, size);
- used = llen;
- linenr++;
-
- if (!strncmp(buffer, "delta ", 6)) {
- patch->is_binary = BINARY_DELTA_DEFLATED;
- patch->deflate_origlen = strtoul(buffer + 6, NULL, 10);
- }
- else if (!strncmp(buffer, "literal ", 8)) {
- patch->is_binary = BINARY_LITERAL_DEFLATED;
- patch->deflate_origlen = strtoul(buffer + 8, NULL, 10);
- }
- else
- return error("unrecognized binary patch at line %d: %.*s",
- linenr-1, llen-1, buffer);
- buffer += llen;
- while (1) {
- int byte_length, max_byte_length, newsize;
- llen = linelen(buffer, size);
- used += llen;
- linenr++;
- if (llen == 1)
- break;
- /* Minimum line is "A00000\n" which is 7-byte long,
- * and the line length must be multiple of 5 plus 2.
- */
- if ((llen < 7) || (llen-2) % 5)
- goto corrupt;
- max_byte_length = (llen - 2) / 5 * 4;
- byte_length = *buffer;
- if ('A' <= byte_length && byte_length <= 'Z')
- byte_length = byte_length - 'A' + 1;
- else if ('a' <= byte_length && byte_length <= 'z')
- byte_length = byte_length - 'a' + 27;
- else
- goto corrupt;
- /* if the input length was not multiple of 4, we would
- * have filler at the end but the filler should never
- * exceed 3 bytes
- */
- if (max_byte_length < byte_length ||
- byte_length <= max_byte_length - 4)
- goto corrupt;
- newsize = fragment->size + byte_length;
- data = xrealloc(data, newsize);
- if (decode_85(data + fragment->size,
- buffer + 1,
- byte_length))
- goto corrupt;
- fragment->size = newsize;
- buffer += llen;
- size -= llen;
- }
- fragment->patch = data;
- return used;
- corrupt:
- return error("corrupt binary patch at line %d: %.*s",
- linenr-1, llen-1, buffer);
-}
-
-static int parse_chunk(char *buffer, unsigned long size, struct patch *patch)
-{
- int hdrsize, patchsize;
- int offset = find_header(buffer, size, &hdrsize, patch);
-
- if (offset < 0)
- return offset;
-
- patchsize = parse_single_patch(buffer + offset + hdrsize, size - offset - hdrsize, patch);
-
- if (!patchsize) {
- static const char *binhdr[] = {
- "Binary files ",
- "Files ",
- NULL,
- };
- static const char git_binary[] = "GIT binary patch\n";
- int i;
- int hd = hdrsize + offset;
- unsigned long llen = linelen(buffer + hd, size - hd);
-
- if (llen == sizeof(git_binary) - 1 &&
- !memcmp(git_binary, buffer + hd, llen)) {
- int used;
- linenr++;
- used = parse_binary(buffer + hd + llen,
- size - hd - llen, patch);
- if (used)
- patchsize = used + llen;
- else
- patchsize = 0;
- }
- else if (!memcmp(" differ\n", buffer + hd + llen - 8, 8)) {
- for (i = 0; binhdr[i]; i++) {
- int len = strlen(binhdr[i]);
- if (len < size - hd &&
- !memcmp(binhdr[i], buffer + hd, len)) {
- linenr++;
- patch->is_binary = 1;
- patchsize = llen;
- break;
- }
- }
- }
-
- /* Empty patch cannot be applied if:
- * - it is a binary patch and we do not do binary_replace, or
- * - text patch without metadata change
- */
- if ((apply || check) &&
- (patch->is_binary
- ? !allow_binary_replacement
- : !metadata_changes(patch)))
- die("patch with only garbage at line %d", linenr);
- }
-
- return offset + hdrsize + patchsize;
-}
-
-static const char pluses[] = "++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++";
-static const char minuses[]= "----------------------------------------------------------------------";
-
-static void show_stats(struct patch *patch)
-{
- const char *prefix = "";
- char *name = patch->new_name;
- char *qname = NULL;
- int len, max, add, del, total;
-
- if (!name)
- name = patch->old_name;
-
- if (0 < (len = quote_c_style(name, NULL, NULL, 0))) {
- qname = xmalloc(len + 1);
- quote_c_style(name, qname, NULL, 0);
- name = qname;
}
-
- /*
- * "scale" the filename
- */
- len = strlen(name);
- max = max_len;
- if (max > 50)
- max = 50;
- if (len > max) {
- char *slash;
- prefix = "...";
- max -= 3;
- name += len - max;
- slash = strchr(name, '/');
- if (slash)
- name = slash;
- }
- len = max;
-
- /*
- * scale the add/delete
- */
- max = max_change;
- if (max + len > 70)
- max = 70 - len;
-
- add = patch->lines_added;
- del = patch->lines_deleted;
- total = add + del;
-
- if (max_change > 0) {
- total = (total * max + max_change / 2) / max_change;
- add = (add * max + max_change / 2) / max_change;
- del = total - add;
- }
- if (patch->is_binary)
- printf(" %s%-*s | Bin\n", prefix, len, name);
- else
- printf(" %s%-*s |%5d %.*s%.*s\n", prefix,
- len, name, patch->lines_added + patch->lines_deleted,
- add, pluses, del, minuses);
- if (qname)
- free(qname);
-}
-
-static int read_old_data(struct stat *st, const char *path, void *buf, unsigned long size)
-{
- int fd;
- unsigned long got;
-
- switch (st->st_mode & S_IFMT) {
- case S_IFLNK:
- return readlink(path, buf, size);
- case S_IFREG:
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return error("unable to open %s", path);
- got = 0;
- for (;;) {
- int ret = xread(fd, buf + got, size - got);
- if (ret <= 0)
- break;
- got += ret;
- }
- close(fd);
- return got;
-
- default:
- return -1;
- }
-}
-
-static int find_offset(const char *buf, unsigned long size, const char *fragment, unsigned long fragsize, int line, int *lines)
-{
- int i;
- unsigned long start, backwards, forwards;
-
- if (fragsize > size)
- return -1;
-
- start = 0;
- if (line > 1) {
- unsigned long offset = 0;
- i = line-1;
- while (offset + fragsize <= size) {
- if (buf[offset++] == '\n') {
- start = offset;
- if (!--i)
- break;
- }
- }
- }
-
- /* Exact line number? */
- if (!memcmp(buf + start, fragment, fragsize))
- return start;
-
- /*
- * There's probably some smart way to do this, but I'll leave
- * that to the smart and beautiful people. I'm simple and stupid.
- */
- backwards = start;
- forwards = start;
- for (i = 0; ; i++) {
- unsigned long try;
- int n;
-
- /* "backward" */
- if (i & 1) {
- if (!backwards) {
- if (forwards + fragsize > size)
- break;
- continue;
- }
- do {
- --backwards;
- } while (backwards && buf[backwards-1] != '\n');
- try = backwards;
- } else {
- while (forwards + fragsize <= size) {
- if (buf[forwards++] == '\n')
- break;
- }
- try = forwards;
- }
-
- if (try + fragsize > size)
- continue;
- if (memcmp(buf + try, fragment, fragsize))
- continue;
- n = (i >> 1)+1;
- if (i & 1)
- n = -n;
- *lines = n;
- return try;
- }
-
- /*
- * We should start searching forward and backward.
- */
- return -1;
-}
-
-static void remove_first_line(const char **rbuf, int *rsize)
-{
- const char *buf = *rbuf;
- int size = *rsize;
- unsigned long offset;
- offset = 0;
- while (offset <= size) {
- if (buf[offset++] == '\n')
- break;
- }
- *rsize = size - offset;
- *rbuf = buf + offset;
-}
-
-static void remove_last_line(const char **rbuf, int *rsize)
-{
- const char *buf = *rbuf;
- int size = *rsize;
- unsigned long offset;
- offset = size - 1;
- while (offset > 0) {
- if (buf[--offset] == '\n')
- break;
- }
- *rsize = offset + 1;
-}
-
-struct buffer_desc {
- char *buffer;
- unsigned long size;
- unsigned long alloc;
-};
-
-static int apply_line(char *output, const char *patch, int plen)
-{
- /* plen is number of bytes to be copied from patch,
- * starting at patch+1 (patch[0] is '+'). Typically
- * patch[plen] is '\n'.
- */
- int add_nl_to_tail = 0;
- if ((new_whitespace == strip_whitespace) &&
- 1 < plen && isspace(patch[plen-1])) {
- if (patch[plen] == '\n')
- add_nl_to_tail = 1;
- plen--;
- while (0 < plen && isspace(patch[plen]))
- plen--;
- applied_after_stripping++;
- }
- memcpy(output, patch + 1, plen);
- if (add_nl_to_tail)
- output[plen++] = '\n';
- return plen;
-}
-
-static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
-{
- char *buf = desc->buffer;
- const char *patch = frag->patch;
- int offset, size = frag->size;
- char *old = xmalloc(size);
- char *new = xmalloc(size);
- const char *oldlines, *newlines;
- int oldsize = 0, newsize = 0;
- unsigned long leading, trailing;
- int pos, lines;
-
- while (size > 0) {
- int len = linelen(patch, size);
- int plen;
-
- if (!len)
- break;
-
- /*
- * "plen" is how much of the line we should use for
- * the actual patch data. Normally we just remove the
- * first character on the line, but if the line is
- * followed by "\ No newline", then we also remove the
- * last one (which is the newline, of course).
- */
- plen = len-1;
- if (len < size && patch[len] == '\\')
- plen--;
- switch (*patch) {
- case ' ':
- case '-':
- memcpy(old + oldsize, patch + 1, plen);
- oldsize += plen;
- if (*patch == '-')
- break;
- /* Fall-through for ' ' */
- case '+':
- if (*patch != '+' || !no_add)
- newsize += apply_line(new + newsize, patch,
- plen);
- break;
- case '@': case '\\':
- /* Ignore it, we already handled it */
- break;
- default:
- return -1;
- }
- patch += len;
- size -= len;
- }
-
-#ifdef NO_ACCURATE_DIFF
- if (oldsize > 0 && old[oldsize - 1] == '\n' &&
- newsize > 0 && new[newsize - 1] == '\n') {
- oldsize--;
- newsize--;
- }
-#endif
-
- oldlines = old;
- newlines = new;
- leading = frag->leading;
- trailing = frag->trailing;
- lines = 0;
- pos = frag->newpos;
- for (;;) {
- offset = find_offset(buf, desc->size, oldlines, oldsize, pos, &lines);
- if (offset >= 0) {
- int diff = newsize - oldsize;
- unsigned long size = desc->size + diff;
- unsigned long alloc = desc->alloc;
-
- /* Warn if it was necessary to reduce the number
- * of context lines.
- */
- if ((leading != frag->leading) || (trailing != frag->trailing))
- fprintf(stderr, "Context reduced to (%ld/%ld) to apply fragment at %d\n",
- leading, trailing, pos + lines);
-
- if (size > alloc) {
- alloc = size + 8192;
- desc->alloc = alloc;
- buf = xrealloc(buf, alloc);
- desc->buffer = buf;
- }
- desc->size = size;
- memmove(buf + offset + newsize, buf + offset + oldsize, size - offset - newsize);
- memcpy(buf + offset, newlines, newsize);
- offset = 0;
-
- break;
- }
-
- /* Am I at my context limits? */
- if ((leading <= p_context) && (trailing <= p_context))
- break;
- /* Reduce the number of context lines
- * Reduce both leading and trailing if they are equal
- * otherwise just reduce the larger context.
- */
- if (leading >= trailing) {
- remove_first_line(&oldlines, &oldsize);
- remove_first_line(&newlines, &newsize);
- pos--;
- leading--;
- }
- if (trailing > leading) {
- remove_last_line(&oldlines, &oldsize);
- remove_last_line(&newlines, &newsize);
- trailing--;
- }
- }
-
- free(old);
- free(new);
- return offset;
-}
-
-static char *inflate_it(const void *data, unsigned long size,
- unsigned long inflated_size)
-{
- z_stream stream;
- void *out;
- int st;
-
- memset(&stream, 0, sizeof(stream));
-
- stream.next_in = (unsigned char *)data;
- stream.avail_in = size;
- stream.next_out = out = xmalloc(inflated_size);
- stream.avail_out = inflated_size;
- inflateInit(&stream);
- st = inflate(&stream, Z_FINISH);
- if ((st != Z_STREAM_END) || stream.total_out != inflated_size) {
- free(out);
- return NULL;
- }
- return out;
-}
-
-static int apply_binary_fragment(struct buffer_desc *desc, struct patch *patch)
-{
- unsigned long dst_size;
- struct fragment *fragment = patch->fragments;
- void *data;
- void *result;
-
- data = inflate_it(fragment->patch, fragment->size,
- patch->deflate_origlen);
- if (!data)
- return error("corrupt patch data");
- switch (patch->is_binary) {
- case BINARY_DELTA_DEFLATED:
- result = patch_delta(desc->buffer, desc->size,
- data,
- patch->deflate_origlen,
- &dst_size);
- free(desc->buffer);
- desc->buffer = result;
- free(data);
- break;
- case BINARY_LITERAL_DEFLATED:
- free(desc->buffer);
- desc->buffer = data;
- dst_size = patch->deflate_origlen;
- break;
- }
- if (!desc->buffer)
- return -1;
- desc->size = desc->alloc = dst_size;
- return 0;
-}
-
-static int apply_binary(struct buffer_desc *desc, struct patch *patch)
-{
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
- unsigned char sha1[20];
- unsigned char hdr[50];
- int hdrlen;
-
- if (!allow_binary_replacement)
- return error("cannot apply binary patch to '%s' "
- "without --allow-binary-replacement",
- name);
-
- /* For safety, we require patch index line to contain
- * full 40-byte textual SHA1 for old and new, at least for now.
- */
- if (strlen(patch->old_sha1_prefix) != 40 ||
- strlen(patch->new_sha1_prefix) != 40 ||
- get_sha1_hex(patch->old_sha1_prefix, sha1) ||
- get_sha1_hex(patch->new_sha1_prefix, sha1))
- return error("cannot apply binary patch to '%s' "
- "without full index line", name);
-
- if (patch->old_name) {
- /* See if the old one matches what the patch
- * applies to.
- */
- write_sha1_file_prepare(desc->buffer, desc->size,
- blob_type, sha1, hdr, &hdrlen);
- if (strcmp(sha1_to_hex(sha1), patch->old_sha1_prefix))
- return error("the patch applies to '%s' (%s), "
- "which does not match the "
- "current contents.",
- name, sha1_to_hex(sha1));
- }
- else {
- /* Otherwise, the old one must be empty. */
- if (desc->size)
- return error("the patch applies to an empty "
- "'%s' but it is not empty", name);
- }
-
- get_sha1_hex(patch->new_sha1_prefix, sha1);
- if (!memcmp(sha1, null_sha1, 20)) {
- free(desc->buffer);
- desc->alloc = desc->size = 0;
- desc->buffer = NULL;
- return 0; /* deletion patch */
- }
-
- if (has_sha1_file(sha1)) {
- /* We already have the postimage */
- char type[10];
- unsigned long size;
-
- free(desc->buffer);
- desc->buffer = read_sha1_file(sha1, type, &size);
- if (!desc->buffer)
- return error("the necessary postimage %s for "
- "'%s' cannot be read",
- patch->new_sha1_prefix, name);
- desc->alloc = desc->size = size;
- }
- else {
- /* We have verified desc matches the preimage;
- * apply the patch data to it, which is stored
- * in the patch->fragments->{patch,size}.
- */
- if (apply_binary_fragment(desc, patch))
- return error("binary patch does not apply to '%s'",
- name);
-
- /* verify that the result matches */
- write_sha1_file_prepare(desc->buffer, desc->size, blob_type,
- sha1, hdr, &hdrlen);
- if (strcmp(sha1_to_hex(sha1), patch->new_sha1_prefix))
- return error("binary patch to '%s' creates incorrect result", name);
- }
-
- return 0;
-}
-
-static int apply_fragments(struct buffer_desc *desc, struct patch *patch)
-{
- struct fragment *frag = patch->fragments;
- const char *name = patch->old_name ? patch->old_name : patch->new_name;
-
- if (patch->is_binary)
- return apply_binary(desc, patch);
-
- while (frag) {
- if (apply_one_fragment(desc, frag) < 0)
- return error("patch failed: %s:%ld",
- name, frag->oldpos);
- frag = frag->next;
- }
- return 0;
-}
-
-static int apply_data(struct patch *patch, struct stat *st, struct cache_entry *ce)
-{
- char *buf;
- unsigned long size, alloc;
- struct buffer_desc desc;
-
- size = 0;
- alloc = 0;
- buf = NULL;
- if (cached) {
- if (ce) {
- char type[20];
- buf = read_sha1_file(ce->sha1, type, &size);
- if (!buf)
- return error("read of %s failed",
- patch->old_name);
- alloc = size;
- }
- }
- else if (patch->old_name) {
- size = st->st_size;
- alloc = size + 8192;
- buf = xmalloc(alloc);
- if (read_old_data(st, patch->old_name, buf, alloc) != size)
- return error("read of %s failed", patch->old_name);
- }
-
- desc.size = size;
- desc.alloc = alloc;
- desc.buffer = buf;
- if (apply_fragments(&desc, patch) < 0)
- return -1;
- patch->result = desc.buffer;
- patch->resultsize = desc.size;
-
- if (patch->is_delete && patch->resultsize)
- return error("removal patch leaves file contents");
-
- return 0;
-}
-
-static int check_patch(struct patch *patch)
-{
- struct stat st;
- const char *old_name = patch->old_name;
- const char *new_name = patch->new_name;
- const char *name = old_name ? old_name : new_name;
- struct cache_entry *ce = NULL;
-
- if (old_name) {
- int changed = 0;
- int stat_ret = 0;
- unsigned st_mode = 0;
-
- if (!cached)
- stat_ret = lstat(old_name, &st);
- if (check_index) {
- int pos = cache_name_pos(old_name, strlen(old_name));
- if (pos < 0)
- return error("%s: does not exist in index",
- old_name);
- ce = active_cache[pos];
- if (stat_ret < 0) {
- struct checkout costate;
- if (errno != ENOENT)
- return error("%s: %s", old_name,
- strerror(errno));
- /* checkout */
- costate.base_dir = "";
- costate.base_dir_len = 0;
- costate.force = 0;
- costate.quiet = 0;
- costate.not_new = 0;
- costate.refresh_cache = 1;
- if (checkout_entry(ce,
- &costate,
- NULL) ||
- lstat(old_name, &st))
- return -1;
- }
- if (!cached)
- changed = ce_match_stat(ce, &st, 1);
- if (changed)
- return error("%s: does not match index",
- old_name);
- if (cached)
- st_mode = ntohl(ce->ce_mode);
- }
- else if (stat_ret < 0)
- return error("%s: %s", old_name, strerror(errno));
-
- if (!cached)
- st_mode = ntohl(create_ce_mode(st.st_mode));
-
- if (patch->is_new < 0)
- patch->is_new = 0;
- if (!patch->old_mode)
- patch->old_mode = st_mode;
- if ((st_mode ^ patch->old_mode) & S_IFMT)
- return error("%s: wrong type", old_name);
- if (st_mode != patch->old_mode)
- fprintf(stderr, "warning: %s has type %o, expected %o\n",
- old_name, st_mode, patch->old_mode);
- }
-
- if (new_name && (patch->is_new | patch->is_rename | patch->is_copy)) {
- if (check_index && cache_name_pos(new_name, strlen(new_name)) >= 0)
- return error("%s: already exists in index", new_name);
- if (!cached && !lstat(new_name, &st))
- return error("%s: already exists in working directory", new_name);
- if (errno != ENOENT)
- return error("%s: %s", new_name, strerror(errno));
- if (!patch->new_mode) {
- if (patch->is_new)
- patch->new_mode = S_IFREG | 0644;
- else
- patch->new_mode = patch->old_mode;
- }
- }
-
- if (new_name && old_name) {
- int same = !strcmp(old_name, new_name);
- if (!patch->new_mode)
- patch->new_mode = patch->old_mode;
- if ((patch->old_mode ^ patch->new_mode) & S_IFMT)
- return error("new mode (%o) of %s does not match old mode (%o)%s%s",
- patch->new_mode, new_name, patch->old_mode,
- same ? "" : " of ", same ? "" : old_name);
- }
-
- if (apply_data(patch, &st, ce) < 0)
- return error("%s: patch does not apply", name);
- return 0;
-}
-
-static int check_patch_list(struct patch *patch)
-{
- int error = 0;
-
- for (;patch ; patch = patch->next)
- error |= check_patch(patch);
- return error;
-}
-
-static inline int is_null_sha1(const unsigned char *sha1)
-{
- return !memcmp(sha1, null_sha1, 20);
-}
-
-static void show_index_list(struct patch *list)
-{
- struct patch *patch;
-
- /* Once we start supporting the reverse patch, it may be
- * worth showing the new sha1 prefix, but until then...
- */
- for (patch = list; patch; patch = patch->next) {
- const unsigned char *sha1_ptr;
- unsigned char sha1[20];
- const char *name;
-
- name = patch->old_name ? patch->old_name : patch->new_name;
- if (patch->is_new)
- sha1_ptr = null_sha1;
- else if (get_sha1(patch->old_sha1_prefix, sha1))
- die("sha1 information is lacking or useless (%s).",
- name);
- else
- sha1_ptr = sha1;
-
- printf("%06o %s ",patch->old_mode, sha1_to_hex(sha1_ptr));
- if (line_termination && quote_c_style(name, NULL, NULL, 0))
- quote_c_style(name, NULL, stdout, 0);
- else
- fputs(name, stdout);
- putchar(line_termination);
- }
-}
-
-static void stat_patch_list(struct patch *patch)
-{
- int files, adds, dels;
-
- for (files = adds = dels = 0 ; patch ; patch = patch->next) {
- files++;
- adds += patch->lines_added;
- dels += patch->lines_deleted;
- show_stats(patch);
- }
-
- printf(" %d files changed, %d insertions(+), %d deletions(-)\n", files, adds, dels);
-}
-
-static void numstat_patch_list(struct patch *patch)
-{
- for ( ; patch; patch = patch->next) {
- const char *name;
- name = patch->new_name ? patch->new_name : patch->old_name;
- printf("%d\t%d\t", patch->lines_added, patch->lines_deleted);
- if (line_termination && quote_c_style(name, NULL, NULL, 0))
- quote_c_style(name, NULL, stdout, 0);
- else
- fputs(name, stdout);
- putchar('\n');
- }
-}
-
-static void show_file_mode_name(const char *newdelete, unsigned int mode, const char *name)
-{
- if (mode)
- printf(" %s mode %06o %s\n", newdelete, mode, name);
- else
- printf(" %s %s\n", newdelete, name);
-}
-
-static void show_mode_change(struct patch *p, int show_name)
-{
- if (p->old_mode && p->new_mode && p->old_mode != p->new_mode) {
- if (show_name)
- printf(" mode change %06o => %06o %s\n",
- p->old_mode, p->new_mode, p->new_name);
- else
- printf(" mode change %06o => %06o\n",
- p->old_mode, p->new_mode);
- }
-}
-
-static void show_rename_copy(struct patch *p)
-{
- const char *renamecopy = p->is_rename ? "rename" : "copy";
- const char *old, *new;
-
- /* Find common prefix */
- old = p->old_name;
- new = p->new_name;
- while (1) {
- const char *slash_old, *slash_new;
- slash_old = strchr(old, '/');
- slash_new = strchr(new, '/');
- if (!slash_old ||
- !slash_new ||
- slash_old - old != slash_new - new ||
- memcmp(old, new, slash_new - new))
- break;
- old = slash_old + 1;
- new = slash_new + 1;
- }
- /* p->old_name thru old is the common prefix, and old and new
- * through the end of names are renames
- */
- if (old != p->old_name)
- printf(" %s %.*s{%s => %s} (%d%%)\n", renamecopy,
- (int)(old - p->old_name), p->old_name,
- old, new, p->score);
- else
- printf(" %s %s => %s (%d%%)\n", renamecopy,
- p->old_name, p->new_name, p->score);
- show_mode_change(p, 0);
-}
-
-static void summary_patch_list(struct patch *patch)
-{
- struct patch *p;
-
- for (p = patch; p; p = p->next) {
- if (p->is_new)
- show_file_mode_name("create", p->new_mode, p->new_name);
- else if (p->is_delete)
- show_file_mode_name("delete", p->old_mode, p->old_name);
- else {
- if (p->is_rename || p->is_copy)
- show_rename_copy(p);
- else {
- if (p->score) {
- printf(" rewrite %s (%d%%)\n",
- p->new_name, p->score);
- show_mode_change(p, 0);
- }
- else
- show_mode_change(p, 1);
- }
- }
- }
-}
-
-static void patch_stats(struct patch *patch)
-{
- int lines = patch->lines_added + patch->lines_deleted;
-
- if (lines > max_change)
- max_change = lines;
- if (patch->old_name) {
- int len = quote_c_style(patch->old_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->old_name);
- if (len > max_len)
- max_len = len;
- }
- if (patch->new_name) {
- int len = quote_c_style(patch->new_name, NULL, NULL, 0);
- if (!len)
- len = strlen(patch->new_name);
- if (len > max_len)
- max_len = len;
- }
-}
-
-static void remove_file(struct patch *patch)
-{
- if (write_index) {
- if (remove_file_from_cache(patch->old_name) < 0)
- die("unable to remove %s from index", patch->old_name);
- cache_tree_invalidate_path(active_cache_tree, patch->old_name);
- }
- if (!cached)
- unlink(patch->old_name);
-}
-
-static void add_index_file(const char *path, unsigned mode, void *buf, unsigned long size)
-{
- struct stat st;
- struct cache_entry *ce;
- int namelen = strlen(path);
- unsigned ce_size = cache_entry_size(namelen);
-
- if (!write_index)
- return;
-
- ce = xcalloc(1, ce_size);
- memcpy(ce->name, path, namelen);
- ce->ce_mode = create_ce_mode(mode);
- ce->ce_flags = htons(namelen);
- if (!cached) {
- if (lstat(path, &st) < 0)
- die("unable to stat newly created file %s", path);
- fill_stat_cache_info(ce, &st);
+ if (!strcmp(option, "change")) {
+ state->ws_ignore_action = ignore_ws_change;
+ return 0;
}
- if (write_sha1_file(buf, size, blob_type, ce->sha1) < 0)
- die("unable to create backing store for newly created file %s", path);
- if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
- die("unable to add cache entry for %s", path);
-}
-
-static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
-{
- int fd;
-
- if (S_ISLNK(mode))
- return symlink(buf, path);
- fd = open(path, O_CREAT | O_EXCL | O_WRONLY, (mode & 0100) ? 0777 : 0666);
- if (fd < 0)
+ return error(_("unrecognized whitespace ignore option '%s'"), option);
+}
+
+int init_apply_state(struct apply_state *state,
+ const char *prefix,
+ struct lock_file *lock_file)
+{
+ memset(state, 0, sizeof(*state));
+ state->prefix = prefix;
+ state->prefix_length = state->prefix ? strlen(state->prefix) : 0;
+ state->lock_file = lock_file;
+ state->newfd = -1;
+ state->apply = 1;
+ state->line_termination = '\n';
+ state->p_value = 1;
+ state->p_context = UINT_MAX;
+ state->squelch_whitespace_errors = 5;
+ state->ws_error_action = warn_on_ws_error;
+ state->ws_ignore_action = ignore_ws_none;
+ state->linenr = 1;
+ string_list_init(&state->fn_table, 0);
+ string_list_init(&state->limit_by_name, 0);
+ string_list_init(&state->symlink_changes, 0);
+ strbuf_init(&state->root, 0);
+
+ git_apply_config();
+ if (apply_default_whitespace && parse_whitespace_option(state, apply_default_whitespace))
return -1;
- while (size) {
- int written = xwrite(fd, buf, size);
- if (written < 0)
- die("writing file %s: %s", path, strerror(errno));
- if (!written)
- die("out of space writing file %s", path);
- buf += written;
- size -= written;
- }
- if (close(fd) < 0)
- die("closing file %s: %s", path, strerror(errno));
- return 0;
-}
-
-/*
- * We optimistically assume that the directories exist,
- * which is true 99% of the time anyway. If they don't,
- * we create them and try again.
- */
-static void create_one_file(char *path, unsigned mode, const char *buf, unsigned long size)
-{
- if (cached)
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
-
- if (errno == ENOENT) {
- if (safe_create_leading_directories(path))
- return;
- if (!try_create_file(path, mode, buf, size))
- return;
- }
-
- if (errno == EEXIST) {
- unsigned int nr = getpid();
-
- for (;;) {
- const char *newpath;
- newpath = mkpath("%s~%u", path, nr);
- if (!try_create_file(newpath, mode, buf, size)) {
- if (!rename(newpath, path))
- return;
- unlink(newpath);
- break;
- }
- if (errno != EEXIST)
- break;
- ++nr;
- }
- }
- die("unable to write file %s mode %o", path, mode);
-}
-
-static void create_file(struct patch *patch)
-{
- char *path = patch->new_name;
- unsigned mode = patch->new_mode;
- unsigned long size = patch->resultsize;
- char *buf = patch->result;
-
- if (!mode)
- mode = S_IFREG | 0644;
- create_one_file(path, mode, buf, size);
- add_index_file(path, mode, buf, size);
- cache_tree_invalidate_path(active_cache_tree, path);
-}
-
-static void write_out_one_result(struct patch *patch)
-{
- if (patch->is_delete > 0) {
- remove_file(patch);
- return;
- }
- if (patch->is_new > 0 || patch->is_copy) {
- create_file(patch);
- return;
- }
- /*
- * Rename or modification boils down to the same
- * thing: remove the old, write the new
- */
- remove_file(patch);
- create_file(patch);
-}
-
-static void write_out_results(struct patch *list, int skipped_patch)
-{
- if (!list && !skipped_patch)
- die("No changes");
-
- while (list) {
- write_out_one_result(list);
- list = list->next;
- }
-}
-
-static struct cache_file cache_file;
-
-static struct excludes {
- struct excludes *next;
- const char *path;
-} *excludes;
-
-static int use_patch(struct patch *p)
-{
- const char *pathname = p->new_name ? p->new_name : p->old_name;
- struct excludes *x = excludes;
- while (x) {
- if (fnmatch(x->path, pathname, 0) == 0)
- return 0;
- x = x->next;
- }
- if (0 < prefix_length) {
- int pathlen = strlen(pathname);
- if (pathlen <= prefix_length ||
- memcmp(prefix, pathname, prefix_length))
- return 0;
- }
- return 1;
-}
-
-static int apply_patch(int fd, const char *filename)
-{
- unsigned long offset, size;
- char *buffer = read_patch_file(fd, &size);
- struct patch *list = NULL, **listp = &list;
- int skipped_patch = 0;
-
- patch_input_file = filename;
- if (!buffer)
+ if (apply_default_ignorewhitespace && parse_ignorewhitespace_option(state, apply_default_ignorewhitespace))
return -1;
- offset = 0;
- while (size > 0) {
- struct patch *patch;
- int nr;
-
- patch = xcalloc(1, sizeof(*patch));
- nr = parse_chunk(buffer + offset, size, patch);
- if (nr < 0)
- break;
- if (use_patch(patch)) {
- patch_stats(patch);
- *listp = patch;
- listp = &patch->next;
- } else {
- /* perhaps free it a bit better? */
- free(patch);
- skipped_patch++;
- }
- offset += nr;
- size -= nr;
- }
-
- if (whitespace_error && (new_whitespace == error_on_whitespace))
- apply = 0;
-
- write_index = check_index && apply;
- if (write_index && newfd < 0)
- newfd = hold_index_file_for_update(&cache_file, get_index_file());
- if (check_index) {
- if (read_cache() < 0)
- die("unable to read index file");
- }
-
- if ((check || apply) && check_patch_list(list) < 0)
- exit(1);
-
- if (apply)
- write_out_results(list, skipped_patch);
-
- if (show_index_info)
- show_index_list(list);
-
- if (diffstat)
- stat_patch_list(list);
-
- if (numstat)
- numstat_patch_list(list);
-
- if (summary)
- summary_patch_list(list);
-
- free(buffer);
return 0;
}
-static int git_apply_config(const char *var, const char *value)
+void clear_apply_state(struct apply_state *state)
{
- if (!strcmp(var, "apply.whitespace")) {
- apply_default_whitespace = strdup(value);
- return 0;
- }
- return git_default_config(var, value);
-}
-
-
-int main(int argc, char **argv)
-{
- int i;
- int read_stdin = 1;
- const char *whitespace_option = NULL;
-
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
- char *end;
- int fd;
-
- if (!strcmp(arg, "-")) {
- apply_patch(0, "<stdin>");
- read_stdin = 0;
- continue;
- }
- if (!strncmp(arg, "--exclude=", 10)) {
- struct excludes *x = xmalloc(sizeof(*x));
- x->path = arg + 10;
- x->next = excludes;
- excludes = x;
- continue;
- }
- if (!strncmp(arg, "-p", 2)) {
- p_value = atoi(arg + 2);
- continue;
- }
- if (!strcmp(arg, "--no-add")) {
- no_add = 1;
- continue;
- }
- if (!strcmp(arg, "--stat")) {
- apply = 0;
- diffstat = 1;
- continue;
- }
- if (!strcmp(arg, "--allow-binary-replacement") ||
- !strcmp(arg, "--binary")) {
- allow_binary_replacement = 1;
- continue;
- }
- if (!strcmp(arg, "--numstat")) {
- apply = 0;
- numstat = 1;
- continue;
- }
- if (!strcmp(arg, "--summary")) {
- apply = 0;
- summary = 1;
- continue;
- }
- if (!strcmp(arg, "--check")) {
- apply = 0;
- check = 1;
- continue;
- }
- if (!strcmp(arg, "--index")) {
- check_index = 1;
- continue;
- }
- if (!strcmp(arg, "--cached")) {
- check_index = 1;
- cached = 1;
- continue;
- }
- if (!strcmp(arg, "--apply")) {
- apply = 1;
- continue;
- }
- if (!strcmp(arg, "--index-info")) {
- apply = 0;
- show_index_info = 1;
- continue;
- }
- if (!strcmp(arg, "-z")) {
- line_termination = 0;
- continue;
- }
- if (!strncmp(arg, "-C", 2)) {
- p_context = strtoul(arg + 2, &end, 0);
- if (*end != '\0')
- die("unrecognized context count '%s'", arg + 2);
- continue;
- }
- if (!strncmp(arg, "--whitespace=", 13)) {
- whitespace_option = arg + 13;
- parse_whitespace_option(arg + 13);
- continue;
- }
+ string_list_clear(&state->limit_by_name, 0);
+ string_list_clear(&state->symlink_changes, 0);
+ strbuf_release(&state->root);
- if (check_index && prefix_length < 0) {
- prefix = setup_git_directory();
- prefix_length = prefix ? strlen(prefix) : 0;
- git_config(git_apply_config);
- if (!whitespace_option && apply_default_whitespace)
- parse_whitespace_option(apply_default_whitespace);
- }
- if (0 < prefix_length)
- arg = prefix_filename(prefix, prefix_length, arg);
-
- fd = open(arg, O_RDONLY);
- if (fd < 0)
- usage(apply_usage);
- read_stdin = 0;
- set_default_whitespace_mode(whitespace_option);
- apply_patch(fd, arg);
- close(fd);
- }
- set_default_whitespace_mode(whitespace_option);
- if (read_stdin)
- apply_patch(0, "<stdin>");
- if (whitespace_error) {
- if (squelch_whitespace_errors &&
- squelch_whitespace_errors < whitespace_error) {
- int squelched =
- whitespace_error - squelch_whitespace_errors;
- fprintf(stderr, "warning: squelched %d whitespace error%s\n",
- squelched,
- squelched == 1 ? "" : "s");
- }
- if (new_whitespace == error_on_whitespace)
- die("%d line%s add%s trailing whitespaces.",
- whitespace_error,
- whitespace_error == 1 ? "" : "s",
- whitespace_error == 1 ? "s" : "");
- if (applied_after_stripping)
- fprintf(stderr, "warning: %d line%s applied after"
- " stripping trailing whitespaces.\n",
- applied_after_stripping,
- applied_after_stripping == 1 ? "" : "s");
- else if (whitespace_error)
- fprintf(stderr, "warning: %d line%s add%s trailing"
- " whitespaces.\n",
- whitespace_error,
- whitespace_error == 1 ? "" : "s",
- whitespace_error == 1 ? "s" : "");
- }
-
- if (write_index) {
- if (write_cache(newfd, active_cache, active_nr) ||
- commit_index_file(&cache_file))
- die("Unable to write new cachefile");
- }
-
- return 0;
+ /* &state->fn_table is cleared at the end of apply_patch() */
}