Make git-update-index a builtin
Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Lukas Sandström
committed by
Junio C Hamano
Junio C Hamano
parent
7499c99615
commit
fefe81c996
658
builtin-update-index.c
Normal file
658
builtin-update-index.c
Normal file
@ -0,0 +1,658 @@
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/*
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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 "strbuf.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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/*
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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 = 0;
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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 |= htons(CE_VALID);
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break;
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case UNMARK_VALID:
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active_cache[pos]->ce_flags &= ~htons(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 add_file_to_cache(const char *path)
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{
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int size, namelen, option, status;
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struct cache_entry *ce;
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struct stat st;
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status = lstat(path, &st);
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/* We probably want to do this in remove_file_from_cache() and
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* add_cache_entry() instead...
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*/
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cache_tree_invalidate_path(active_cache_tree, path);
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if (status < 0 || S_ISDIR(st.st_mode)) {
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/* When we used to have "path" and now we want to add
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* "path/file", we need a way to remove "path" before
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* being able to add "path/file". However,
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* "git-update-index --remove path" would not work.
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* --force-remove can be used but this is more user
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* friendly, especially since we can do the opposite
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* case just fine without --force-remove.
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*/
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if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
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if (allow_remove) {
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if (remove_file_from_cache(path))
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return error("%s: cannot remove from the index",
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path);
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else
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return 0;
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} else if (status < 0) {
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return error("%s: does not exist and --remove not passed",
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path);
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}
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}
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if (0 == status)
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return error("%s: is a directory - add files inside instead",
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path);
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else
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return error("lstat(\"%s\"): %s", path,
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strerror(errno));
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}
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namelen = strlen(path);
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size = cache_entry_size(namelen);
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ce = xcalloc(1, size);
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memcpy(ce->name, path, namelen);
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ce->ce_flags = htons(namelen);
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fill_stat_cache_info(ce, &st);
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ce->ce_mode = create_ce_mode(st.st_mode);
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if (!trust_executable_bit) {
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/* If there is an existing entry, pick the mode bits
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* from it.
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*/
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int pos = cache_name_pos(path, namelen);
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if (0 <= pos)
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ce->ce_mode = active_cache[pos]->ce_mode;
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}
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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?",
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path);
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return 0;
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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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memcpy(ce->sha1, sha1, 20);
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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 |= htons(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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cache_tree_invalidate_path(active_cache_tree, 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 = ntohl(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 |= htonl(0111); break;
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case '-':
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ce->ce_mode &= htonl(~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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cache_tree_invalidate_path(active_cache_tree, path);
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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 (add_file_to_cache(p))
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die("Unable to process file %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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strbuf_init(&buf);
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while (1) {
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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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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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read_line(&buf, stdin, line_termination);
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if (buf.eof)
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break;
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mode = strtoul(buf.buf, &ptr, 8);
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if (ptr == buf.buf || *ptr != ' ')
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goto bad_line;
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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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if (line_termination && ptr[0] == '"')
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path_name = unquote_c_style(ptr, NULL);
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else
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path_name = ptr;
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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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if (path_name != ptr)
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free(path_name);
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continue;
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}
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cache_tree_invalidate_path(active_cache_tree, path_name);
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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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if (path_name != ptr)
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free(path_name);
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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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}
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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] [--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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memcpy(ce->sha1, sha1, 20);
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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 (!memcmp(ce_2->sha1, ce_3->sha1, 20) &&
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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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cache_tree_invalidate_path(active_cache_tree, path);
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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(git_path("HEAD"), head_sha1))
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die("No HEAD -- no initial commit yet?\n");
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if (read_ref(git_path("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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|
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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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}
|
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static int do_reupdate(int ac, const char **av,
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const char *prefix, int prefix_length)
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{
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/* Read HEAD and run update-index on paths that are
|
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* merged and already different between index and HEAD.
|
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*/
|
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int pos;
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int has_head = 1;
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const char **pathspec = get_pathspec(prefix, av + 1);
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if (read_ref(git_path("HEAD"), head_sha1))
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/* If there is no HEAD, that means it is an initial
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* commit. Update everything in the index.
|
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*/
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has_head = 0;
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redo:
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for (pos = 0; pos < active_nr; pos++) {
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struct cache_entry *ce = active_cache[pos];
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struct cache_entry *old = NULL;
|
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int save_nr;
|
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|
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if (ce_stage(ce) || !ce_path_match(ce, pathspec))
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continue;
|
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if (has_head)
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old = read_one_ent(NULL, head_sha1,
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ce->name, ce_namelen(ce), 0);
|
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if (old && ce->ce_mode == old->ce_mode &&
|
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!memcmp(ce->sha1, old->sha1, 20)) {
|
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free(old);
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continue; /* unchanged */
|
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}
|
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/* Be careful. The working tree may not have the
|
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* path anymore, in which case, under 'allow_remove',
|
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* or worse yet 'allow_replace', active_nr may decrease.
|
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*/
|
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save_nr = active_nr;
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update_one(ce->name + prefix_length, prefix, prefix_length);
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if (save_nr != active_nr)
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goto redo;
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}
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return 0;
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}
|
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|
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int cmd_update_index(int argc, const char **argv, char **envp)
|
||||
{
|
||||
int i, newfd, entries, has_errors = 0, line_termination = '\n';
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int allow_options = 1;
|
||||
int read_from_stdin = 0;
|
||||
const char *prefix = setup_git_directory();
|
||||
int prefix_length = prefix ? strlen(prefix) : 0;
|
||||
char set_executable_bit = 0;
|
||||
unsigned int refresh_flags = 0;
|
||||
struct lock_file *lock_file;
|
||||
|
||||
git_config(git_default_config);
|
||||
|
||||
/* We can't free this memory, it becomes part of a linked list parsed atexit() */
|
||||
lock_file = xmalloc(sizeof(struct lock_file));
|
||||
|
||||
newfd = hold_lock_file_for_update(lock_file, get_index_file());
|
||||
if (newfd < 0)
|
||||
die("unable to create new cachefile");
|
||||
|
||||
entries = read_cache();
|
||||
if (entries < 0)
|
||||
die("cache corrupted");
|
||||
|
||||
for (i = 1 ; i < argc; i++) {
|
||||
const char *path = argv[i];
|
||||
|
||||
if (allow_options && *path == '-') {
|
||||
if (!strcmp(path, "--")) {
|
||||
allow_options = 0;
|
||||
continue;
|
||||
}
|
||||
if (!strcmp(path, "-q")) {
|
||||
refresh_flags |= REFRESH_QUIET;
|
||||
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 ((sscanf(argv[i+1], "%o", &mode) != 1) ||
|
||||
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")) {
|
||||
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);
|
||||
}
|
||||
update_one(path, prefix, prefix_length);
|
||||
if (set_executable_bit)
|
||||
chmod_path(set_executable_bit, path);
|
||||
}
|
||||
if (read_from_stdin) {
|
||||
struct strbuf buf;
|
||||
strbuf_init(&buf);
|
||||
while (1) {
|
||||
char *path_name;
|
||||
const char *p;
|
||||
read_line(&buf, stdin, line_termination);
|
||||
if (buf.eof)
|
||||
break;
|
||||
if (line_termination && buf.buf[0] == '"')
|
||||
path_name = unquote_c_style(buf.buf, NULL);
|
||||
else
|
||||
path_name = buf.buf;
|
||||
p = prefix_path(prefix, prefix_length, path_name);
|
||||
update_one(p, NULL, 0);
|
||||
if (set_executable_bit)
|
||||
chmod_path(set_executable_bit, p);
|
||||
if (p < path_name || p > path_name + strlen(path_name))
|
||||
free((char*) p);
|
||||
if (path_name != buf.buf)
|
||||
free(path_name);
|
||||
}
|
||||
}
|
||||
|
||||
finish:
|
||||
if (active_cache_changed) {
|
||||
if (write_cache(newfd, active_cache, active_nr) ||
|
||||
commit_lock_file(lock_file))
|
||||
die("Unable to write new index file");
|
||||
}
|
||||
|
||||
rollback_lock_file(lock_file);
|
||||
|
||||
return has_errors ? 1 : 0;
|
||||
}
|
||||
Reference in New Issue
Block a user