Revision 16652170bf80542fd77de75fb88da2f7761f65c4 authored by Junio C Hamano on 27 September 2006, 19:34:37 UTC, committed by Junio C Hamano on 27 September 2006, 19:34:37 UTC
This script creates two separate histories, A and B, each of which does: (A0, B0): create fileA and subdir/fileB (A1, B1): modify fileA (A2, B2): modify subdir/fileB and then grafts them together to make B0 a child of A2. So the final history looks like (time flows from top to bottom): true parent touches subdir? A0 none yes (creates it) A1 A0 no A2 A1 yes B0 none yes (different from what's in A2) B1 B0 no B2 B1 yes "git rev-list --parents --pretty=raw B2" would give "fake" parents on the "commit " header lines while "parent " header lines show the parent as recorded in the commit object (i.e. B0 appears to have A2 as its parent on "commit " header but there is no "parent A2" header line in it). When you have path limiters, we simplify history to omit commits that do not affect the specified paths. So "git rev-list --parents --pretty=raw B2 subdir" would return "B2 B0 A2 A0" (because B1 and A1 do not touch the path). When it does so, the "commit " header lines have "fake" parents (i.e. B2 appears to have B0 as its parent on "commit " header), but you can still get the true parents by looking at "parent " header. Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 4a0641b
builtin-rm.c
/*
* "git rm" builtin command
*
* Copyright (C) Linus Torvalds 2006
*/
#include "cache.h"
#include "builtin.h"
#include "dir.h"
#include "cache-tree.h"
static const char builtin_rm_usage[] =
"git-rm [-n] [-v] [-f] <filepattern>...";
static struct {
int nr, alloc;
const char **name;
} list;
static void add_list(const char *name)
{
if (list.nr >= list.alloc) {
list.alloc = alloc_nr(list.alloc);
list.name = xrealloc(list.name, list.alloc * sizeof(const char *));
}
list.name[list.nr++] = name;
}
static int remove_file(const char *name)
{
int ret;
char *slash;
ret = unlink(name);
if (!ret && (slash = strrchr(name, '/'))) {
char *n = xstrdup(name);
do {
n[slash - name] = 0;
name = n;
} while (!rmdir(name) && (slash = strrchr(name, '/')));
}
return ret;
}
static struct lock_file lock_file;
int cmd_rm(int argc, const char **argv, const char *prefix)
{
int i, newfd;
int verbose = 0, show_only = 0, force = 0;
const char **pathspec;
char *seen;
git_config(git_default_config);
newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
if (read_cache() < 0)
die("index file corrupt");
for (i = 1 ; i < argc ; i++) {
const char *arg = argv[i];
if (*arg != '-')
break;
if (!strcmp(arg, "--")) {
i++;
break;
}
if (!strcmp(arg, "-n")) {
show_only = 1;
continue;
}
if (!strcmp(arg, "-v")) {
verbose = 1;
continue;
}
if (!strcmp(arg, "-f")) {
force = 1;
continue;
}
usage(builtin_rm_usage);
}
if (argc <= i)
usage(builtin_rm_usage);
pathspec = get_pathspec(prefix, argv + i);
seen = NULL;
for (i = 0; pathspec[i] ; i++)
/* nothing */;
seen = xcalloc(i, 1);
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
continue;
add_list(ce->name);
}
if (pathspec) {
const char *match;
for (i = 0; (match = pathspec[i]) != NULL ; i++) {
if (*match && !seen[i])
die("pathspec '%s' did not match any files", match);
}
}
/*
* First remove the names from the index: we won't commit
* the index unless all of them succeed
*/
for (i = 0; i < list.nr; i++) {
const char *path = list.name[i];
printf("rm '%s'\n", path);
if (remove_file_from_cache(path))
die("git-rm: unable to remove %s", path);
cache_tree_invalidate_path(active_cache_tree, path);
}
if (show_only)
return 0;
/*
* Then, if we used "-f", remove the filenames from the
* workspace. If we fail to remove the first one, we
* abort the "git rm" (but once we've successfully removed
* any file at all, we'll go ahead and commit to it all:
* by then we've already committed ourselves and can't fail
* in the middle)
*/
if (force) {
int removed = 0;
for (i = 0; i < list.nr; i++) {
const char *path = list.name[i];
if (!remove_file(path)) {
removed = 1;
continue;
}
if (!removed)
die("git-rm: %s: %s", path, strerror(errno));
}
}
if (active_cache_changed) {
if (write_cache(newfd, active_cache, active_nr) ||
close(newfd) || commit_lock_file(&lock_file))
die("Unable to write new index file");
}
return 0;
}
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