#include "rerere.h"
#include "xdiff/xdiff.h"
#include "xdiff-interface.h"
+#include "dir.h"
+#include "resolve-undo.h"
+#include "ll-merge.h"
/* if rerere_enabled == -1, fall back to detection of .git/rr-cache */
static int rerere_enabled = -1;
static char *merge_rr_path;
-static const char *rr_path(const char *name, const char *file)
+const char *rerere_path(const char *hex, const char *file)
{
- return git_path("rr-cache/%s/%s", name, file);
+ return git_path("rr-cache/%s/%s", hex, file);
}
-static int has_resolution(const char *name)
+int has_rerere_resolution(const char *hex)
{
struct stat st;
- return !stat(rr_path(name, "postimage"), &st);
+ return !stat(rerere_path(hex, "postimage"), &st);
}
static void read_rr(struct string_list *rr)
path = rr->items[i].string;
length = strlen(path) + 1;
if (write_in_full(out_fd, rr->items[i].util, 40) != 40 ||
- write_in_full(out_fd, "\t", 1) != 1 ||
+ write_str_in_full(out_fd, "\t") != 1 ||
write_in_full(out_fd, path, length) != length)
die("unable to write rerere record");
}
return 0;
}
-static int handle_file(const char *path,
- unsigned char *sha1, const char *output)
+static void ferr_write(const void *p, size_t count, FILE *fp, int *err)
{
- SHA_CTX ctx;
- char buf[1024];
- int hunk = 0, hunk_no = 0;
- struct strbuf one, two;
- FILE *f = fopen(path, "r");
- FILE *out = NULL;
-
- if (!f)
- return error("Could not open %s", path);
+ if (!count || *err)
+ return;
+ if (fwrite(p, count, 1, fp) != 1)
+ *err = errno;
+}
- if (output) {
- out = fopen(output, "w");
- if (!out) {
- fclose(f);
- return error("Could not write %s", output);
- }
- }
+static inline void ferr_puts(const char *s, FILE *fp, int *err)
+{
+ ferr_write(s, strlen(s), fp, err);
+}
+
+struct rerere_io {
+ int (*getline)(struct strbuf *, struct rerere_io *);
+ FILE *output;
+ int wrerror;
+ /* some more stuff */
+};
+
+static void rerere_io_putstr(const char *str, struct rerere_io *io)
+{
+ if (io->output)
+ ferr_puts(str, io->output, &io->wrerror);
+}
+
+static void rerere_io_putmem(const char *mem, size_t sz, struct rerere_io *io)
+{
+ if (io->output)
+ ferr_write(mem, sz, io->output, &io->wrerror);
+}
+
+struct rerere_io_file {
+ struct rerere_io io;
+ FILE *input;
+};
+
+static int rerere_file_getline(struct strbuf *sb, struct rerere_io *io_)
+{
+ struct rerere_io_file *io = (struct rerere_io_file *)io_;
+ return strbuf_getwholeline(sb, io->input, '\n');
+}
+
+static int handle_path(unsigned char *sha1, struct rerere_io *io)
+{
+ git_SHA_CTX ctx;
+ int hunk_no = 0;
+ enum {
+ RR_CONTEXT = 0, RR_SIDE_1, RR_SIDE_2, RR_ORIGINAL,
+ } hunk = RR_CONTEXT;
+ struct strbuf one = STRBUF_INIT, two = STRBUF_INIT;
+ struct strbuf buf = STRBUF_INIT;
if (sha1)
- SHA1_Init(&ctx);
+ git_SHA1_Init(&ctx);
- strbuf_init(&one, 0);
- strbuf_init(&two, 0);
- while (fgets(buf, sizeof(buf), f)) {
- if (!prefixcmp(buf, "<<<<<<< ")) {
- if (hunk)
+ while (!io->getline(&buf, io)) {
+ if (!prefixcmp(buf.buf, "<<<<<<< ")) {
+ if (hunk != RR_CONTEXT)
goto bad;
- hunk = 1;
- } else if (!prefixcmp(buf, "=======") && isspace(buf[7])) {
- if (hunk != 1)
+ hunk = RR_SIDE_1;
+ } else if (!prefixcmp(buf.buf, "|||||||") && isspace(buf.buf[7])) {
+ if (hunk != RR_SIDE_1)
goto bad;
- hunk = 2;
- } else if (!prefixcmp(buf, ">>>>>>> ")) {
- if (hunk != 2)
+ hunk = RR_ORIGINAL;
+ } else if (!prefixcmp(buf.buf, "=======") && isspace(buf.buf[7])) {
+ if (hunk != RR_SIDE_1 && hunk != RR_ORIGINAL)
+ goto bad;
+ hunk = RR_SIDE_2;
+ } else if (!prefixcmp(buf.buf, ">>>>>>> ")) {
+ if (hunk != RR_SIDE_2)
goto bad;
if (strbuf_cmp(&one, &two) > 0)
strbuf_swap(&one, &two);
hunk_no++;
- hunk = 0;
- if (out) {
- fputs("<<<<<<<\n", out);
- fwrite(one.buf, one.len, 1, out);
- fputs("=======\n", out);
- fwrite(two.buf, two.len, 1, out);
- fputs(">>>>>>>\n", out);
- }
+ hunk = RR_CONTEXT;
+ rerere_io_putstr("<<<<<<<\n", io);
+ rerere_io_putmem(one.buf, one.len, io);
+ rerere_io_putstr("=======\n", io);
+ rerere_io_putmem(two.buf, two.len, io);
+ rerere_io_putstr(">>>>>>>\n", io);
if (sha1) {
- SHA1_Update(&ctx, one.buf ? one.buf : "",
+ git_SHA1_Update(&ctx, one.buf ? one.buf : "",
one.len + 1);
- SHA1_Update(&ctx, two.buf ? two.buf : "",
+ git_SHA1_Update(&ctx, two.buf ? two.buf : "",
two.len + 1);
}
strbuf_reset(&one);
strbuf_reset(&two);
- } else if (hunk == 1)
- strbuf_addstr(&one, buf);
- else if (hunk == 2)
- strbuf_addstr(&two, buf);
- else if (out)
- fputs(buf, out);
+ } else if (hunk == RR_SIDE_1)
+ strbuf_addstr(&one, buf.buf);
+ else if (hunk == RR_ORIGINAL)
+ ; /* discard */
+ else if (hunk == RR_SIDE_2)
+ strbuf_addstr(&two, buf.buf);
+ else
+ rerere_io_putstr(buf.buf, io);
continue;
bad:
hunk = 99; /* force error exit */
}
strbuf_release(&one);
strbuf_release(&two);
+ strbuf_release(&buf);
- fclose(f);
- if (out)
- fclose(out);
if (sha1)
- SHA1_Final(sha1, &ctx);
- if (hunk) {
+ git_SHA1_Final(sha1, &ctx);
+ if (hunk != RR_CONTEXT)
+ return -1;
+ return hunk_no;
+}
+
+static int handle_file(const char *path, unsigned char *sha1, const char *output)
+{
+ int hunk_no = 0;
+ struct rerere_io_file io;
+
+ memset(&io, 0, sizeof(io));
+ io.io.getline = rerere_file_getline;
+ io.input = fopen(path, "r");
+ io.io.wrerror = 0;
+ if (!io.input)
+ return error("Could not open %s", path);
+
+ if (output) {
+ io.io.output = fopen(output, "w");
+ if (!io.io.output) {
+ fclose(io.input);
+ return error("Could not write %s", output);
+ }
+ }
+
+ hunk_no = handle_path(sha1, (struct rerere_io *)&io);
+
+ fclose(io.input);
+ if (io.io.wrerror)
+ error("There were errors while writing %s (%s)",
+ path, strerror(io.io.wrerror));
+ if (io.io.output && fclose(io.io.output))
+ io.io.wrerror = error("Failed to flush %s: %s",
+ path, strerror(errno));
+
+ if (hunk_no < 0) {
if (output)
- unlink(output);
+ unlink_or_warn(output);
return error("Could not parse conflict hunks in %s", path);
}
+ if (io.io.wrerror)
+ return -1;
+ return hunk_no;
+}
+
+struct rerere_io_mem {
+ struct rerere_io io;
+ struct strbuf input;
+};
+
+static int rerere_mem_getline(struct strbuf *sb, struct rerere_io *io_)
+{
+ struct rerere_io_mem *io = (struct rerere_io_mem *)io_;
+ char *ep;
+ size_t len;
+
+ strbuf_release(sb);
+ if (!io->input.len)
+ return -1;
+ ep = strchrnul(io->input.buf, '\n');
+ if (*ep == '\n')
+ ep++;
+ len = ep - io->input.buf;
+ strbuf_add(sb, io->input.buf, len);
+ strbuf_remove(&io->input, 0, len);
+ return 0;
+}
+
+static int handle_cache(const char *path, unsigned char *sha1, const char *output)
+{
+ mmfile_t mmfile[3];
+ mmbuffer_t result = {NULL, 0};
+ struct cache_entry *ce;
+ int pos, len, i, hunk_no;
+ struct rerere_io_mem io;
+
+ /*
+ * Reproduce the conflicted merge in-core
+ */
+ len = strlen(path);
+ pos = cache_name_pos(path, len);
+ if (0 <= pos)
+ return -1;
+ pos = -pos - 1;
+
+ for (i = 0; i < 3; i++) {
+ enum object_type type;
+ unsigned long size;
+
+ mmfile[i].size = 0;
+ mmfile[i].ptr = NULL;
+ if (active_nr <= pos)
+ break;
+ ce = active_cache[pos++];
+ if (ce_namelen(ce) != len || memcmp(ce->name, path, len)
+ || ce_stage(ce) != i + 1)
+ break;
+ mmfile[i].ptr = read_sha1_file(ce->sha1, &type, &size);
+ mmfile[i].size = size;
+ }
+ for (i = 0; i < 3; i++) {
+ if (!mmfile[i].ptr && !mmfile[i].size)
+ mmfile[i].ptr = xstrdup("");
+ }
+ ll_merge(&result, path, &mmfile[0],
+ &mmfile[1], "ours",
+ &mmfile[2], "theirs", 0);
+ for (i = 0; i < 3; i++)
+ free(mmfile[i].ptr);
+
+ memset(&io, 0, sizeof(&io));
+ io.io.getline = rerere_mem_getline;
+ if (output)
+ io.io.output = fopen(output, "w");
+ else
+ io.io.output = NULL;
+ strbuf_init(&io.input, 0);
+ strbuf_attach(&io.input, result.ptr, result.size, result.size);
+
+ hunk_no = handle_path(sha1, (struct rerere_io *)&io);
+ strbuf_release(&io.input);
+ if (io.io.output)
+ fclose(io.io.output);
return hunk_no;
}
int ret;
mmfile_t cur, base, other;
mmbuffer_t result = {NULL, 0};
- xpparam_t xpp = {XDF_NEED_MINIMAL};
+ xmparam_t xmp = {{XDF_NEED_MINIMAL}};
- if (handle_file(path, NULL, rr_path(name, "thisimage")) < 0)
+ if (handle_file(path, NULL, rerere_path(name, "thisimage")) < 0)
return 1;
- if (read_mmfile(&cur, rr_path(name, "thisimage")) ||
- read_mmfile(&base, rr_path(name, "preimage")) ||
- read_mmfile(&other, rr_path(name, "postimage")))
+ if (read_mmfile(&cur, rerere_path(name, "thisimage")) ||
+ read_mmfile(&base, rerere_path(name, "preimage")) ||
+ read_mmfile(&other, rerere_path(name, "postimage")))
return 1;
ret = xdl_merge(&base, &cur, "", &other, "",
- &xpp, XDL_MERGE_ZEALOUS, &result);
+ &xmp, XDL_MERGE_ZEALOUS, &result);
if (!ret) {
FILE *f = fopen(path, "w");
if (!f)
- return error("Could not write to %s", path);
- fwrite(result.ptr, result.size, 1, f);
- fclose(f);
+ return error("Could not open %s: %s", path,
+ strerror(errno));
+ if (fwrite(result.ptr, result.size, 1, f) != 1)
+ error("Could not write %s: %s", path, strerror(errno));
+ if (fclose(f))
+ return error("Writing %s failed: %s", path,
+ strerror(errno));
}
free(cur.ptr);
hex = xstrdup(sha1_to_hex(sha1));
string_list_insert(path, rr)->util = hex;
if (mkdir(git_path("rr-cache/%s", hex), 0755))
- continue;;
- handle_file(path, NULL, rr_path(hex, "preimage"));
+ continue;
+ handle_file(path, NULL, rerere_path(hex, "preimage"));
fprintf(stderr, "Recorded preimage for '%s'\n", path);
}
}
const char *path = rr->items[i].string;
const char *name = (const char *)rr->items[i].util;
- if (has_resolution(name)) {
+ if (has_rerere_resolution(name)) {
if (!merge(name, path)) {
if (rerere_autoupdate)
string_list_insert(path, &update);
continue;
fprintf(stderr, "Recorded resolution for '%s'.\n", path);
- copy_file(rr_path(name, "postimage"), path, 0666);
+ copy_file(rerere_path(name, "postimage"), path, 0666);
mark_resolved:
rr->items[i].util = NULL;
}
static int is_rerere_enabled(void)
{
- struct stat st;
const char *rr_cache;
int rr_cache_exists;
return 0;
rr_cache = git_path("rr-cache");
- rr_cache_exists = !stat(rr_cache, &st) && S_ISDIR(st.st_mode);
+ rr_cache_exists = is_directory(rr_cache);
if (rerere_enabled < 0)
return rr_cache_exists;
return 0;
return do_plain_rerere(&merge_rr, fd);
}
+
+static int rerere_forget_one_path(const char *path, struct string_list *rr)
+{
+ const char *filename;
+ char *hex;
+ unsigned char sha1[20];
+ int ret;
+
+ ret = handle_cache(path, sha1, NULL);
+ if (ret < 1)
+ return error("Could not parse conflict hunks in '%s'", path);
+ hex = xstrdup(sha1_to_hex(sha1));
+ filename = rerere_path(hex, "postimage");
+ if (unlink(filename))
+ return (errno == ENOENT
+ ? error("no remembered resolution for %s", path)
+ : error("cannot unlink %s: %s", filename, strerror(errno)));
+
+ handle_cache(path, sha1, rerere_path(hex, "preimage"));
+ fprintf(stderr, "Updated preimage for '%s'\n", path);
+
+
+ string_list_insert(path, rr)->util = hex;
+ fprintf(stderr, "Forgot resolution for %s\n", path);
+ return 0;
+}
+
+int rerere_forget(const char **pathspec)
+{
+ int i, fd;
+ struct string_list conflict = { NULL, 0, 0, 1 };
+ struct string_list merge_rr = { NULL, 0, 0, 1 };
+
+ if (read_cache() < 0)
+ return error("Could not read index");
+
+ fd = setup_rerere(&merge_rr);
+
+ unmerge_cache(pathspec);
+ find_conflict(&conflict);
+ for (i = 0; i < conflict.nr; i++) {
+ struct string_list_item *it = &conflict.items[i];
+ if (!match_pathspec(pathspec, it->string, strlen(it->string),
+ 0, NULL))
+ continue;
+ rerere_forget_one_path(it->string, &merge_rr);
+ }
+ return write_rr(&merge_rr, fd);
+}