*
* Copyright (C) 2016 Johannes Schindelin
*/
+#define USE_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
+#include "config.h"
#include "builtin.h"
#include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
#include "parse-options.h"
#include "argv-array.h"
#include "strbuf.h"
#include "lockfile.h"
+#include "object-store.h"
#include "dir.h"
-static char *diff_gui_tool;
static int trust_exit_code;
static const char *const builtin_difftool_usage[] = {
static int difftool_config(const char *var, const char *value, void *cb)
{
- if (!strcmp(var, "diff.guitool")) {
- diff_gui_tool = xstrdup(value);
- return 0;
- }
-
if (!strcmp(var, "difftool.trustexitcode")) {
trust_exit_code = git_config_bool(var, value);
return 0;
*mode2 = (int)strtol(p + 1, &p, 8);
if (*p != ' ')
return error("expected ' ', got '%c'", *p);
- if (get_oid_hex(++p, oid1))
- return error("expected object ID, got '%s'", p + 1);
- p += GIT_SHA1_HEXSZ;
+ if (parse_oid_hex(++p, oid1, (const char **)&p))
+ return error("expected object ID, got '%s'", p);
if (*p != ' ')
return error("expected ' ', got '%c'", *p);
- if (get_oid_hex(++p, oid2))
- return error("expected object ID, got '%s'", p + 1);
- p += GIT_SHA1_HEXSZ;
+ if (parse_oid_hex(++p, oid2, (const char **)&p))
+ return error("expected object ID, got '%s'", p);
if (*p != ' ')
return error("expected ' ', got '%c'", *p);
*status = *++p;
int fd = open(buf.buf, O_RDONLY);
if (fd >= 0 &&
- !index_fd(wt_oid.hash, fd, &st, OBJ_BLOB, name, 0)) {
+ !index_fd(&the_index, &wt_oid, fd, &st, OBJ_BLOB, name, 0)) {
if (is_null_oid(oid)) {
oidcpy(oid, &wt_oid);
use = 1;
- } else if (!oidcmp(oid, &wt_oid))
+ } else if (oideq(oid, &wt_oid))
use = 1;
}
}
char path[FLEX_ARRAY];
};
-static int working_tree_entry_cmp(struct working_tree_entry *a,
- struct working_tree_entry *b, void *keydata)
+static int working_tree_entry_cmp(const void *unused_cmp_data,
+ const void *entry,
+ const void *entry_or_key,
+ const void *unused_keydata)
{
+ const struct working_tree_entry *a = entry;
+ const struct working_tree_entry *b = entry_or_key;
return strcmp(a->path, b->path);
}
const char path[FLEX_ARRAY];
};
-static int pair_cmp(struct pair_entry *a, struct pair_entry *b, void *keydata)
+static int pair_cmp(const void *unused_cmp_data,
+ const void *entry,
+ const void *entry_or_key,
+ const void *unused_keydata)
{
+ const struct pair_entry *a = entry;
+ const struct pair_entry *b = entry_or_key;
+
return strcmp(a->path, b->path);
}
char path[FLEX_ARRAY];
};
-static int path_entry_cmp(struct path_entry *a, struct path_entry *b, void *key)
+static int path_entry_cmp(const void *unused_cmp_data,
+ const void *entry,
+ const void *entry_or_key,
+ const void *key)
{
+ const struct path_entry *a = entry;
+ const struct path_entry *b = entry_or_key;
+
return strcmp(a->path, key ? key : b->path);
}
hashmap_entry_init(entry, strhash(buf.buf));
hashmap_add(result, entry);
}
+ fclose(fp);
if (finish_command(&diff_files))
die("diff-files did not exit properly");
strbuf_release(&index_env);
}
}
+/*
+ * Unconditional writing of a plain regular file is what
+ * "git difftool --dir-diff" wants to do for symlinks. We are preparing two
+ * temporary directories to be fed to a Git-unaware tool that knows how to
+ * show a diff of two directories (e.g. "diff -r A B").
+ *
+ * Because the tool is Git-unaware, if a symbolic link appears in either of
+ * these temporary directories, it will try to dereference and show the
+ * difference of the target of the symbolic link, which is not what we want,
+ * as the goal of the dir-diff mode is to produce an output that is logically
+ * equivalent to what "git diff" produces.
+ *
+ * Most importantly, we want to get textual comparison of the result of the
+ * readlink(2). get_symlink() provides that---it returns the contents of
+ * the symlink that gets written to a regular file to force the external tool
+ * to compare the readlink(2) result as text, even on a filesystem that is
+ * capable of doing a symbolic link.
+ */
+static char *get_symlink(const struct object_id *oid, const char *path)
+{
+ char *data;
+ if (is_null_oid(oid)) {
+ /* The symlink is unknown to Git so read from the filesystem */
+ struct strbuf link = STRBUF_INIT;
+ if (has_symlinks) {
+ if (strbuf_readlink(&link, path, strlen(path)))
+ die(_("could not read symlink %s"), path);
+ } else if (strbuf_read_file(&link, path, 128))
+ die(_("could not read symlink file %s"), path);
+
+ data = strbuf_detach(&link, NULL);
+ } else {
+ enum object_type type;
+ unsigned long size;
+ data = read_object_file(oid, &type, &size);
+ if (!data)
+ die(_("could not read object %s for symlink %s"),
+ oid_to_hex(oid), path);
+ }
+
+ return data;
+}
+
+static int checkout_path(unsigned mode, struct object_id *oid,
+ const char *path, const struct checkout *state)
+{
+ struct cache_entry *ce;
+ int ret;
+
+ ce = make_transient_cache_entry(mode, oid, path, 0);
+ ret = checkout_entry(ce, state, NULL, NULL);
+
+ discard_cache_entry(ce);
+ return ret;
+}
+
static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
int argc, const char **argv)
{
struct strbuf rpath = STRBUF_INIT, buf = STRBUF_INIT;
struct strbuf ldir = STRBUF_INIT, rdir = STRBUF_INIT;
struct strbuf wtdir = STRBUF_INIT;
+ char *lbase_dir, *rbase_dir;
size_t ldir_len, rdir_len, wtdir_len;
- struct cache_entry *ce = xcalloc(1, sizeof(ce) + PATH_MAX + 1);
const char *workdir, *tmp;
int ret = 0, i;
FILE *fp;
struct hashmap working_tree_dups, submodules, symlinks2;
struct hashmap_iter iter;
struct pair_entry *entry;
- enum object_type type;
- unsigned long size;
struct index_state wtindex;
struct checkout lstate, rstate;
int rc, flags = RUN_GIT_CMD, err = 0;
memset(&wtindex, 0, sizeof(wtindex));
memset(&lstate, 0, sizeof(lstate));
- lstate.base_dir = ldir.buf;
+ lstate.base_dir = lbase_dir = xstrdup(ldir.buf);
lstate.base_dir_len = ldir.len;
lstate.force = 1;
memset(&rstate, 0, sizeof(rstate));
- rstate.base_dir = rdir.buf;
+ rstate.base_dir = rbase_dir = xstrdup(rdir.buf);
rstate.base_dir_len = rdir.len;
rstate.force = 1;
rdir_len = rdir.len;
wtdir_len = wtdir.len;
- hashmap_init(&working_tree_dups,
- (hashmap_cmp_fn)working_tree_entry_cmp, 0);
- hashmap_init(&submodules, (hashmap_cmp_fn)pair_cmp, 0);
- hashmap_init(&symlinks2, (hashmap_cmp_fn)pair_cmp, 0);
+ hashmap_init(&working_tree_dups, working_tree_entry_cmp, NULL, 0);
+ hashmap_init(&submodules, pair_cmp, NULL, 0);
+ hashmap_init(&symlinks2, pair_cmp, NULL, 0);
child.no_stdin = 1;
child.git_cmd = 1;
struct object_id loid, roid;
char status;
const char *src_path, *dst_path;
- size_t src_path_len, dst_path_len;
if (starts_with(info.buf, "::"))
die(N_("combined diff formats('-c' and '--cc') are "
if (strbuf_getline_nul(&lpath, fp))
break;
src_path = lpath.buf;
- src_path_len = lpath.len;
i++;
if (status != 'C' && status != 'R') {
dst_path = src_path;
- dst_path_len = src_path_len;
} else {
if (strbuf_getline_nul(&rpath, fp))
break;
dst_path = rpath.buf;
- dst_path_len = rpath.len;
}
if (S_ISGITLINK(lmode) || S_ISGITLINK(rmode)) {
strbuf_reset(&buf);
strbuf_addf(&buf, "Subproject commit %s",
oid_to_hex(&roid));
- if (!oidcmp(&loid, &roid))
+ if (oideq(&loid, &roid))
strbuf_addstr(&buf, "-dirty");
add_left_or_right(&submodules, dst_path, buf.buf, 1);
continue;
}
if (S_ISLNK(lmode)) {
- char *content = read_sha1_file(loid.hash, &type, &size);
+ char *content = get_symlink(&loid, src_path);
add_left_or_right(&symlinks2, src_path, content, 0);
free(content);
}
if (S_ISLNK(rmode)) {
- char *content = read_sha1_file(roid.hash, &type, &size);
+ char *content = get_symlink(&roid, dst_path);
add_left_or_right(&symlinks2, dst_path, content, 1);
free(content);
}
if (lmode && status != 'C') {
- ce->ce_mode = lmode;
- oidcpy(&ce->oid, &loid);
- strcpy(ce->name, src_path);
- ce->ce_namelen = src_path_len;
- if (checkout_entry(ce, &lstate, NULL))
- return error("could not write '%s'", src_path);
+ if (checkout_path(lmode, &loid, src_path, &lstate)) {
+ ret = error("could not write '%s'", src_path);
+ goto finish;
+ }
}
- if (rmode) {
+ if (rmode && !S_ISLNK(rmode)) {
struct working_tree_entry *entry;
/* Avoid duplicate working_tree entries */
hashmap_add(&working_tree_dups, entry);
if (!use_wt_file(workdir, dst_path, &roid)) {
- ce->ce_mode = rmode;
- oidcpy(&ce->oid, &roid);
- strcpy(ce->name, dst_path);
- ce->ce_namelen = dst_path_len;
- if (checkout_entry(ce, &rstate, NULL))
- return error("could not write '%s'",
- dst_path);
+ if (checkout_path(rmode, &roid, dst_path,
+ &rstate)) {
+ ret = error("could not write '%s'",
+ dst_path);
+ goto finish;
+ }
} else if (!is_null_oid(&roid)) {
/*
* Changes in the working tree need special
* index.
*/
struct cache_entry *ce2 =
- make_cache_entry(rmode, roid.hash,
+ make_cache_entry(&wtindex, rmode, &roid,
dst_path, 0, 0);
add_index_entry(&wtindex, ce2,
ADD_CACHE_JUST_APPEND);
add_path(&rdir, rdir_len, dst_path);
- if (ensure_leading_directories(rdir.buf))
- return error("could not create "
- "directory for '%s'",
- dst_path);
+ if (ensure_leading_directories(rdir.buf)) {
+ ret = error("could not create "
+ "directory for '%s'",
+ dst_path);
+ goto finish;
+ }
add_path(&wtdir, wtdir_len, dst_path);
if (symlinks) {
if (symlink(wtdir.buf, rdir.buf)) {
}
}
+ fclose(fp);
+ fp = NULL;
if (finish_command(&child)) {
ret = error("error occurred running diff --raw");
goto finish;
}
if (!i)
- return 0;
+ goto finish;
/*
* Changes to submodules require special treatment.This loop writes a
* in the common case of --symlinks and the difftool updating
* files through the symlink.
*/
- hashmap_init(&wt_modified, (hashmap_cmp_fn)path_entry_cmp,
- wtindex.cache_nr);
- hashmap_init(&tmp_modified, (hashmap_cmp_fn)path_entry_cmp,
- wtindex.cache_nr);
+ hashmap_init(&wt_modified, path_entry_cmp, NULL, wtindex.cache_nr);
+ hashmap_init(&tmp_modified, path_entry_cmp, NULL, wtindex.cache_nr);
for (i = 0; i < wtindex.cache_nr; i++) {
struct hashmap_entry dummy;
continue;
if (!indices_loaded) {
- static struct lock_file lock;
+ struct lock_file lock = LOCK_INIT;
strbuf_reset(&buf);
strbuf_addf(&buf, "%s/wtindex", tmpdir);
if (hold_lock_file_for_update(&lock, buf.buf, 0) < 0 ||
write_locked_index(&wtindex, &lock, COMMIT_LOCK)) {
ret = error("could not write %s", buf.buf);
- rollback_lock_file(&lock);
goto finish;
}
changed_files(&wt_modified, buf.buf, workdir);
exit_cleanup(tmpdir, rc);
finish:
- free(ce);
+ if (fp)
+ fclose(fp);
+
+ free(lbase_dir);
+ free(rbase_dir);
strbuf_release(&ldir);
strbuf_release(&rdir);
strbuf_release(&wtdir);
int cmd_difftool(int argc, const char **argv, const char *prefix)
{
int use_gui_tool = 0, dir_diff = 0, prompt = -1, symlinks = 0,
- tool_help = 0;
+ tool_help = 0, no_index = 0;
static char *difftool_cmd = NULL, *extcmd = NULL;
struct option builtin_difftool_options[] = {
OPT_BOOL('g', "gui", &use_gui_tool,
N_("use `diff.guitool` instead of `diff.tool`")),
OPT_BOOL('d', "dir-diff", &dir_diff,
N_("perform a full-directory diff")),
- { OPTION_SET_INT, 'y', "no-prompt", &prompt, NULL,
+ OPT_SET_INT_F('y', "no-prompt", &prompt,
N_("do not prompt before launching a diff tool"),
- PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, 0},
- { OPTION_SET_INT, 0, "prompt", &prompt, NULL, NULL,
- PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN,
- NULL, 1 },
+ 0, PARSE_OPT_NONEG),
+ OPT_SET_INT_F(0, "prompt", &prompt, NULL,
+ 1, PARSE_OPT_NONEG | PARSE_OPT_HIDDEN),
OPT_BOOL(0, "symlinks", &symlinks,
N_("use symlinks in dir-diff mode")),
- OPT_STRING('t', "tool", &difftool_cmd, N_("<tool>"),
+ OPT_STRING('t', "tool", &difftool_cmd, N_("tool"),
N_("use the specified diff tool")),
OPT_BOOL(0, "tool-help", &tool_help,
N_("print a list of diff tools that may be used with "
OPT_BOOL(0, "trust-exit-code", &trust_exit_code,
N_("make 'git-difftool' exit when an invoked diff "
"tool returns a non - zero exit code")),
- OPT_STRING('x', "extcmd", &extcmd, N_("<command>"),
+ OPT_STRING('x', "extcmd", &extcmd, N_("command"),
N_("specify a custom command for viewing diffs")),
+ OPT_ARGUMENT("no-index", &no_index, N_("passed to `diff`")),
OPT_END()
};
if (tool_help)
return print_tool_help();
- /* NEEDSWORK: once we no longer spawn anything, remove this */
- setenv(GIT_DIR_ENVIRONMENT, absolute_path(get_git_dir()), 1);
- setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(get_git_work_tree()), 1);
+ if (!no_index && !startup_info->have_repository)
+ die(_("difftool requires worktree or --no-index"));
+
+ if (!no_index){
+ setup_work_tree();
+ setenv(GIT_DIR_ENVIRONMENT, absolute_path(get_git_dir()), 1);
+ setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(get_git_work_tree()), 1);
+ } else if (dir_diff)
+ die(_("--dir-diff is incompatible with --no-index"));
+
+ if (use_gui_tool + !!difftool_cmd + !!extcmd > 1)
+ die(_("--gui, --tool and --extcmd are mutually exclusive"));
- if (use_gui_tool && diff_gui_tool && *diff_gui_tool)
- setenv("GIT_DIFF_TOOL", diff_gui_tool, 1);
+ if (use_gui_tool)
+ setenv("GIT_MERGETOOL_GUI", "true", 1);
else if (difftool_cmd) {
if (*difftool_cmd)
setenv("GIT_DIFF_TOOL", difftool_cmd, 1);