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https://github.com/git/git
synced 2024-08-24 18:26:02 +00:00
![Stephan Beyer](/assets/img/avatar_default.png)
When you misuse a git command, you are shown the usage string. But this is currently shown in the dashed form. So if you just copy what you see, it will not work, when the dashed form is no longer supported. This patch makes git commands show the dash-less version. For shell scripts that do not specify OPTIONS_SPEC, git-sh-setup.sh generates a dash-less usage string now. Signed-off-by: Stephan Beyer <s-beyer@gmx.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
753 lines
19 KiB
C
753 lines
19 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "quote.h"
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#include "cache-tree.h"
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#include "tree-walk.h"
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#include "builtin.h"
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#include "refs.h"
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/*
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* Default to not allowing changes to the list of files. The
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* tool doesn't actually care, but this makes it harder to add
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* files to the revision control by mistake by doing something
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* like "git-update-index *" and suddenly having all the object
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* files be revision controlled.
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*/
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static int allow_add;
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static int allow_remove;
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static int allow_replace;
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static int info_only;
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static int force_remove;
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static int verbose;
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static int mark_valid_only;
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#define MARK_VALID 1
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#define UNMARK_VALID 2
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static void report(const char *fmt, ...)
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{
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va_list vp;
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if (!verbose)
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return;
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va_start(vp, fmt);
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vprintf(fmt, vp);
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putchar('\n');
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va_end(vp);
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}
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static int mark_valid(const char *path)
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{
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int namelen = strlen(path);
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int pos = cache_name_pos(path, namelen);
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if (0 <= pos) {
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switch (mark_valid_only) {
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case MARK_VALID:
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active_cache[pos]->ce_flags |= CE_VALID;
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break;
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case UNMARK_VALID:
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active_cache[pos]->ce_flags &= ~CE_VALID;
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break;
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}
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cache_tree_invalidate_path(active_cache_tree, path);
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active_cache_changed = 1;
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return 0;
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}
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return -1;
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}
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static int remove_one_path(const char *path)
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{
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if (!allow_remove)
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return error("%s: does not exist and --remove not passed", path);
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if (remove_file_from_cache(path))
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return error("%s: cannot remove from the index", path);
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return 0;
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}
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/*
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* Handle a path that couldn't be lstat'ed. It's either:
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* - missing file (ENOENT or ENOTDIR). That's ok if we're
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* supposed to be removing it and the removal actually
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* succeeds.
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* - permission error. That's never ok.
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*/
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static int process_lstat_error(const char *path, int err)
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{
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if (err == ENOENT || err == ENOTDIR)
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return remove_one_path(path);
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return error("lstat(\"%s\"): %s", path, strerror(errno));
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}
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static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
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{
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int option, size;
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struct cache_entry *ce;
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/* Was the old index entry already up-to-date? */
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if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
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return 0;
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size = cache_entry_size(len);
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ce = xcalloc(1, size);
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memcpy(ce->name, path, len);
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ce->ce_flags = len;
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fill_stat_cache_info(ce, st);
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ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
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if (index_path(ce->sha1, path, st, !info_only))
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return -1;
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option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
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option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
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if (add_cache_entry(ce, option))
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return error("%s: cannot add to the index - missing --add option?", path);
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return 0;
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}
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/*
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* Handle a path that was a directory. Four cases:
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*
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* - it's already a gitlink in the index, and we keep it that
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* way, and update it if we can (if we cannot find the HEAD,
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* we're going to keep it unchanged in the index!)
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*
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* - it's a *file* in the index, in which case it should be
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* removed as a file if removal is allowed, since it doesn't
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* exist as such any more. If removal isn't allowed, it's
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* an error.
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*
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* (NOTE! This is old and arguably fairly strange behaviour.
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* We might want to make this an error unconditionally, and
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* use "--force-remove" if you actually want to force removal).
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*
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* - it used to exist as a subdirectory (ie multiple files with
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* this particular prefix) in the index, in which case it's wrong
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* to try to update it as a directory.
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*
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* - it doesn't exist at all in the index, but it is a valid
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* git directory, and it should be *added* as a gitlink.
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*/
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static int process_directory(const char *path, int len, struct stat *st)
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{
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unsigned char sha1[20];
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int pos = cache_name_pos(path, len);
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/* Exact match: file or existing gitlink */
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if (pos >= 0) {
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struct cache_entry *ce = active_cache[pos];
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if (S_ISGITLINK(ce->ce_mode)) {
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/* Do nothing to the index if there is no HEAD! */
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if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
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return 0;
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return add_one_path(ce, path, len, st);
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}
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/* Should this be an unconditional error? */
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return remove_one_path(path);
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}
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/* Inexact match: is there perhaps a subdirectory match? */
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pos = -pos-1;
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while (pos < active_nr) {
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struct cache_entry *ce = active_cache[pos++];
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if (strncmp(ce->name, path, len))
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break;
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if (ce->name[len] > '/')
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break;
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if (ce->name[len] < '/')
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continue;
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/* Subdirectory match - error out */
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return error("%s: is a directory - add individual files instead", path);
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}
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/* No match - should we add it as a gitlink? */
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if (!resolve_gitlink_ref(path, "HEAD", sha1))
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return add_one_path(NULL, path, len, st);
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/* Error out. */
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return error("%s: is a directory - add files inside instead", path);
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}
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/*
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* Process a regular file
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*/
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static int process_file(const char *path, int len, struct stat *st)
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{
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int pos = cache_name_pos(path, len);
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struct cache_entry *ce = pos < 0 ? NULL : active_cache[pos];
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if (ce && S_ISGITLINK(ce->ce_mode))
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return error("%s is already a gitlink, not replacing", path);
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return add_one_path(ce, path, len, st);
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}
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static int process_path(const char *path)
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{
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int len;
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struct stat st;
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/*
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* First things first: get the stat information, to decide
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* what to do about the pathname!
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*/
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if (lstat(path, &st) < 0)
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return process_lstat_error(path, errno);
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len = strlen(path);
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if (S_ISDIR(st.st_mode))
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return process_directory(path, len, &st);
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return process_file(path, len, &st);
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}
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static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
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const char *path, int stage)
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{
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int size, len, option;
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struct cache_entry *ce;
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if (!verify_path(path))
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return -1;
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len = strlen(path);
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size = cache_entry_size(len);
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ce = xcalloc(1, size);
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hashcpy(ce->sha1, sha1);
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memcpy(ce->name, path, len);
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ce->ce_flags = create_ce_flags(len, stage);
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ce->ce_mode = create_ce_mode(mode);
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if (assume_unchanged)
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ce->ce_flags |= CE_VALID;
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option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
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option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
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if (add_cache_entry(ce, option))
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return error("%s: cannot add to the index - missing --add option?",
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path);
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report("add '%s'", path);
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return 0;
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}
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static void chmod_path(int flip, const char *path)
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{
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int pos;
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struct cache_entry *ce;
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unsigned int mode;
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pos = cache_name_pos(path, strlen(path));
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if (pos < 0)
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goto fail;
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ce = active_cache[pos];
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mode = ce->ce_mode;
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if (!S_ISREG(mode))
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goto fail;
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switch (flip) {
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case '+':
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ce->ce_mode |= 0111; break;
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case '-':
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ce->ce_mode &= ~0111; break;
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default:
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goto fail;
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}
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cache_tree_invalidate_path(active_cache_tree, path);
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active_cache_changed = 1;
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report("chmod %cx '%s'", flip, path);
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return;
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fail:
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die("git-update-index: cannot chmod %cx '%s'", flip, path);
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}
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static void update_one(const char *path, const char *prefix, int prefix_length)
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{
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const char *p = prefix_path(prefix, prefix_length, path);
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if (!verify_path(p)) {
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fprintf(stderr, "Ignoring path %s\n", path);
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goto free_return;
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}
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if (mark_valid_only) {
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if (mark_valid(p))
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die("Unable to mark file %s", path);
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goto free_return;
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}
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if (force_remove) {
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if (remove_file_from_cache(p))
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die("git-update-index: unable to remove %s", path);
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report("remove '%s'", path);
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goto free_return;
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}
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if (process_path(p))
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die("Unable to process path %s", path);
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report("add '%s'", path);
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free_return:
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if (p < path || p > path + strlen(path))
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free((char*)p);
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}
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static void read_index_info(int line_termination)
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{
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struct strbuf buf;
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struct strbuf uq;
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strbuf_init(&buf, 0);
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strbuf_init(&uq, 0);
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while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
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char *ptr, *tab;
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char *path_name;
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unsigned char sha1[20];
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unsigned int mode;
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unsigned long ul;
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int stage;
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/* This reads lines formatted in one of three formats:
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*
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* (1) mode SP sha1 TAB path
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* The first format is what "git-apply --index-info"
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* reports, and used to reconstruct a partial tree
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* that is used for phony merge base tree when falling
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* back on 3-way merge.
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*
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* (2) mode SP type SP sha1 TAB path
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* The second format is to stuff git-ls-tree output
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* into the index file.
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*
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* (3) mode SP sha1 SP stage TAB path
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* This format is to put higher order stages into the
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* index file and matches git-ls-files --stage output.
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*/
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errno = 0;
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ul = strtoul(buf.buf, &ptr, 8);
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if (ptr == buf.buf || *ptr != ' '
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|| errno || (unsigned int) ul != ul)
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goto bad_line;
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mode = ul;
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tab = strchr(ptr, '\t');
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if (!tab || tab - ptr < 41)
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goto bad_line;
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if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
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stage = tab[-1] - '0';
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ptr = tab + 1; /* point at the head of path */
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tab = tab - 2; /* point at tail of sha1 */
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}
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else {
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stage = 0;
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ptr = tab + 1; /* point at the head of path */
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}
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if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
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goto bad_line;
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path_name = ptr;
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if (line_termination && path_name[0] == '"') {
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strbuf_reset(&uq);
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if (unquote_c_style(&uq, path_name, NULL)) {
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die("git-update-index: bad quoting of path name");
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}
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path_name = uq.buf;
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}
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if (!verify_path(path_name)) {
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fprintf(stderr, "Ignoring path %s\n", path_name);
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continue;
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}
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if (!mode) {
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/* mode == 0 means there is no such path -- remove */
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if (remove_file_from_cache(path_name))
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die("git-update-index: unable to remove %s",
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ptr);
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}
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else {
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/* mode ' ' sha1 '\t' name
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* ptr[-1] points at tab,
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* ptr[-41] is at the beginning of sha1
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*/
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ptr[-42] = ptr[-1] = 0;
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if (add_cacheinfo(mode, sha1, path_name, stage))
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die("git-update-index: unable to update %s",
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path_name);
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}
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continue;
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bad_line:
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die("malformed index info %s", buf.buf);
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}
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strbuf_release(&buf);
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strbuf_release(&uq);
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}
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static const char update_index_usage[] =
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"git update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again | -g] [--ignore-missing] [-z] [--verbose] [--] <file>...";
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static unsigned char head_sha1[20];
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static unsigned char merge_head_sha1[20];
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static struct cache_entry *read_one_ent(const char *which,
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unsigned char *ent, const char *path,
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int namelen, int stage)
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{
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unsigned mode;
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unsigned char sha1[20];
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int size;
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struct cache_entry *ce;
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if (get_tree_entry(ent, path, sha1, &mode)) {
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if (which)
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error("%s: not in %s branch.", path, which);
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return NULL;
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}
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if (mode == S_IFDIR) {
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if (which)
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error("%s: not a blob in %s branch.", path, which);
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return NULL;
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}
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size = cache_entry_size(namelen);
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ce = xcalloc(1, size);
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hashcpy(ce->sha1, sha1);
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memcpy(ce->name, path, namelen);
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ce->ce_flags = create_ce_flags(namelen, stage);
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ce->ce_mode = create_ce_mode(mode);
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return ce;
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}
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static int unresolve_one(const char *path)
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{
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int namelen = strlen(path);
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int pos;
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int ret = 0;
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struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
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/* See if there is such entry in the index. */
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pos = cache_name_pos(path, namelen);
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if (pos < 0) {
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/* If there isn't, either it is unmerged, or
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* resolved as "removed" by mistake. We do not
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* want to do anything in the former case.
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*/
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pos = -pos-1;
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if (pos < active_nr) {
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struct cache_entry *ce = active_cache[pos];
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if (ce_namelen(ce) == namelen &&
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!memcmp(ce->name, path, namelen)) {
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fprintf(stderr,
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"%s: skipping still unmerged path.\n",
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path);
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goto free_return;
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}
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}
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}
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/* Grab blobs from given path from HEAD and MERGE_HEAD,
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* stuff HEAD version in stage #2,
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* stuff MERGE_HEAD version in stage #3.
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*/
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ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
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ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
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if (!ce_2 || !ce_3) {
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ret = -1;
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goto free_return;
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}
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if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
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ce_2->ce_mode == ce_3->ce_mode) {
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fprintf(stderr, "%s: identical in both, skipping.\n",
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path);
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goto free_return;
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}
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remove_file_from_cache(path);
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if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
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error("%s: cannot add our version to the index.", path);
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ret = -1;
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goto free_return;
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}
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if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
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return 0;
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error("%s: cannot add their version to the index.", path);
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ret = -1;
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free_return:
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free(ce_2);
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free(ce_3);
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return ret;
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}
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static void read_head_pointers(void)
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{
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if (read_ref("HEAD", head_sha1))
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die("No HEAD -- no initial commit yet?\n");
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if (read_ref("MERGE_HEAD", merge_head_sha1)) {
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fprintf(stderr, "Not in the middle of a merge.\n");
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exit(0);
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}
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}
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static int do_unresolve(int ac, const char **av,
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const char *prefix, int prefix_length)
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{
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int i;
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int err = 0;
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/* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
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* are not doing a merge, so exit with success status.
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*/
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read_head_pointers();
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for (i = 1; i < ac; i++) {
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const char *arg = av[i];
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const char *p = prefix_path(prefix, prefix_length, arg);
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err |= unresolve_one(p);
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if (p < arg || p > arg + strlen(arg))
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free((char*)p);
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}
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return err;
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|
}
|
|
|
|
static int do_reupdate(int ac, const char **av,
|
|
const char *prefix, int prefix_length)
|
|
{
|
|
/* Read HEAD and run update-index on paths that are
|
|
* merged and already different between index and HEAD.
|
|
*/
|
|
int pos;
|
|
int has_head = 1;
|
|
const char **pathspec = get_pathspec(prefix, av + 1);
|
|
|
|
if (read_ref("HEAD", head_sha1))
|
|
/* If there is no HEAD, that means it is an initial
|
|
* commit. Update everything in the index.
|
|
*/
|
|
has_head = 0;
|
|
redo:
|
|
for (pos = 0; pos < active_nr; pos++) {
|
|
struct cache_entry *ce = active_cache[pos];
|
|
struct cache_entry *old = NULL;
|
|
int save_nr;
|
|
|
|
if (ce_stage(ce) || !ce_path_match(ce, pathspec))
|
|
continue;
|
|
if (has_head)
|
|
old = read_one_ent(NULL, head_sha1,
|
|
ce->name, ce_namelen(ce), 0);
|
|
if (old && ce->ce_mode == old->ce_mode &&
|
|
!hashcmp(ce->sha1, old->sha1)) {
|
|
free(old);
|
|
continue; /* unchanged */
|
|
}
|
|
/* Be careful. The working tree may not have the
|
|
* path anymore, in which case, under 'allow_remove',
|
|
* or worse yet 'allow_replace', active_nr may decrease.
|
|
*/
|
|
save_nr = active_nr;
|
|
update_one(ce->name + prefix_length, prefix, prefix_length);
|
|
if (save_nr != active_nr)
|
|
goto redo;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int cmd_update_index(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int i, newfd, entries, has_errors = 0, line_termination = '\n';
|
|
int allow_options = 1;
|
|
int read_from_stdin = 0;
|
|
int prefix_length = prefix ? strlen(prefix) : 0;
|
|
char set_executable_bit = 0;
|
|
unsigned int refresh_flags = 0;
|
|
int lock_error = 0;
|
|
struct lock_file *lock_file;
|
|
|
|
git_config(git_default_config, NULL);
|
|
|
|
/* We can't free this memory, it becomes part of a linked list parsed atexit() */
|
|
lock_file = xcalloc(1, sizeof(struct lock_file));
|
|
|
|
newfd = hold_locked_index(lock_file, 0);
|
|
if (newfd < 0)
|
|
lock_error = errno;
|
|
|
|
entries = read_cache();
|
|
if (entries < 0)
|
|
die("cache corrupted");
|
|
|
|
for (i = 1 ; i < argc; i++) {
|
|
const char *path = argv[i];
|
|
const char *p;
|
|
|
|
if (allow_options && *path == '-') {
|
|
if (!strcmp(path, "--")) {
|
|
allow_options = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "-q")) {
|
|
refresh_flags |= REFRESH_QUIET;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--ignore-submodules")) {
|
|
refresh_flags |= REFRESH_IGNORE_SUBMODULES;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--add")) {
|
|
allow_add = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--replace")) {
|
|
allow_replace = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--remove")) {
|
|
allow_remove = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--unmerged")) {
|
|
refresh_flags |= REFRESH_UNMERGED;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--refresh")) {
|
|
has_errors |= refresh_cache(refresh_flags);
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--really-refresh")) {
|
|
has_errors |= refresh_cache(REFRESH_REALLY | refresh_flags);
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--cacheinfo")) {
|
|
unsigned char sha1[20];
|
|
unsigned int mode;
|
|
|
|
if (i+3 >= argc)
|
|
die("git-update-index: --cacheinfo <mode> <sha1> <path>");
|
|
|
|
if (strtoul_ui(argv[i+1], 8, &mode) ||
|
|
get_sha1_hex(argv[i+2], sha1) ||
|
|
add_cacheinfo(mode, sha1, argv[i+3], 0))
|
|
die("git-update-index: --cacheinfo"
|
|
" cannot add %s", argv[i+3]);
|
|
i += 3;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--chmod=-x") ||
|
|
!strcmp(path, "--chmod=+x")) {
|
|
if (argc <= i+1)
|
|
die("git-update-index: %s <path>", path);
|
|
set_executable_bit = path[8];
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--assume-unchanged")) {
|
|
mark_valid_only = MARK_VALID;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--no-assume-unchanged")) {
|
|
mark_valid_only = UNMARK_VALID;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--info-only")) {
|
|
info_only = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--force-remove")) {
|
|
force_remove = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "-z")) {
|
|
line_termination = 0;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--stdin")) {
|
|
if (i != argc - 1)
|
|
die("--stdin must be at the end");
|
|
read_from_stdin = 1;
|
|
break;
|
|
}
|
|
if (!strcmp(path, "--index-info")) {
|
|
if (i != argc - 1)
|
|
die("--index-info must be at the end");
|
|
allow_add = allow_replace = allow_remove = 1;
|
|
read_index_info(line_termination);
|
|
break;
|
|
}
|
|
if (!strcmp(path, "--unresolve")) {
|
|
has_errors = do_unresolve(argc - i, argv + i,
|
|
prefix, prefix_length);
|
|
if (has_errors)
|
|
active_cache_changed = 0;
|
|
goto finish;
|
|
}
|
|
if (!strcmp(path, "--again") || !strcmp(path, "-g")) {
|
|
has_errors = do_reupdate(argc - i, argv + i,
|
|
prefix, prefix_length);
|
|
if (has_errors)
|
|
active_cache_changed = 0;
|
|
goto finish;
|
|
}
|
|
if (!strcmp(path, "--ignore-missing")) {
|
|
refresh_flags |= REFRESH_IGNORE_MISSING;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "--verbose")) {
|
|
verbose = 1;
|
|
continue;
|
|
}
|
|
if (!strcmp(path, "-h") || !strcmp(path, "--help"))
|
|
usage(update_index_usage);
|
|
die("unknown option %s", path);
|
|
}
|
|
p = prefix_path(prefix, prefix_length, path);
|
|
update_one(p, NULL, 0);
|
|
if (set_executable_bit)
|
|
chmod_path(set_executable_bit, p);
|
|
if (p < path || p > path + strlen(path))
|
|
free((char*)p);
|
|
}
|
|
if (read_from_stdin) {
|
|
struct strbuf buf, nbuf;
|
|
|
|
strbuf_init(&buf, 0);
|
|
strbuf_init(&nbuf, 0);
|
|
while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
|
|
const char *p;
|
|
if (line_termination && buf.buf[0] == '"') {
|
|
strbuf_reset(&nbuf);
|
|
if (unquote_c_style(&nbuf, buf.buf, NULL))
|
|
die("line is badly quoted");
|
|
strbuf_swap(&buf, &nbuf);
|
|
}
|
|
p = prefix_path(prefix, prefix_length, buf.buf);
|
|
update_one(p, NULL, 0);
|
|
if (set_executable_bit)
|
|
chmod_path(set_executable_bit, p);
|
|
if (p < buf.buf || p > buf.buf + buf.len)
|
|
free((char *)p);
|
|
}
|
|
strbuf_release(&nbuf);
|
|
strbuf_release(&buf);
|
|
}
|
|
|
|
finish:
|
|
if (active_cache_changed) {
|
|
if (newfd < 0) {
|
|
if (refresh_flags & REFRESH_QUIET)
|
|
exit(128);
|
|
die("unable to create '%s.lock': %s",
|
|
get_index_file(), strerror(lock_error));
|
|
}
|
|
if (write_cache(newfd, active_cache, active_nr) ||
|
|
commit_locked_index(lock_file))
|
|
die("Unable to write new index file");
|
|
}
|
|
|
|
rollback_lock_file(lock_file);
|
|
|
|
return has_errors ? 1 : 0;
|
|
}
|