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https://github.com/git/git
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![René Scharfe](/assets/img/avatar_default.png)
Use diff_tree_combined_merge() instead of open-coding it. Signed-off-by: René Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
874 lines
25 KiB
C
874 lines
25 KiB
C
#include "cache.h"
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#include "submodule.h"
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#include "dir.h"
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#include "diff.h"
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#include "commit.h"
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#include "revision.h"
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#include "run-command.h"
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#include "diffcore.h"
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#include "refs.h"
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#include "string-list.h"
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#include "sha1-array.h"
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#include "argv-array.h"
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static struct string_list config_name_for_path;
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static struct string_list config_fetch_recurse_submodules_for_name;
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static struct string_list config_ignore_for_name;
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static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
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static struct string_list changed_submodule_paths;
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static int initialized_fetch_ref_tips;
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static struct sha1_array ref_tips_before_fetch;
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static struct sha1_array ref_tips_after_fetch;
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/*
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* The following flag is set if the .gitmodules file is unmerged. We then
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* disable recursion for all submodules where .git/config doesn't have a
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* matching config entry because we can't guess what might be configured in
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* .gitmodules unless the user resolves the conflict. When a command line
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* option is given (which always overrides configuration) this flag will be
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* ignored.
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*/
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static int gitmodules_is_unmerged;
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static int add_submodule_odb(const char *path)
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{
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struct strbuf objects_directory = STRBUF_INIT;
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struct alternate_object_database *alt_odb;
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int ret = 0;
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const char *git_dir;
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strbuf_addf(&objects_directory, "%s/.git", path);
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git_dir = read_gitfile(objects_directory.buf);
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if (git_dir) {
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strbuf_reset(&objects_directory);
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strbuf_addstr(&objects_directory, git_dir);
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}
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strbuf_addstr(&objects_directory, "/objects/");
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if (!is_directory(objects_directory.buf)) {
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ret = -1;
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goto done;
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}
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/* avoid adding it twice */
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for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
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if (alt_odb->name - alt_odb->base == objects_directory.len &&
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!strncmp(alt_odb->base, objects_directory.buf,
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objects_directory.len))
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goto done;
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alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
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alt_odb->next = alt_odb_list;
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strcpy(alt_odb->base, objects_directory.buf);
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alt_odb->name = alt_odb->base + objects_directory.len;
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alt_odb->name[2] = '/';
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alt_odb->name[40] = '\0';
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alt_odb->name[41] = '\0';
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alt_odb_list = alt_odb;
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prepare_alt_odb();
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done:
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strbuf_release(&objects_directory);
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return ret;
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}
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void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
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const char *path)
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{
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struct string_list_item *path_option, *ignore_option;
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path_option = unsorted_string_list_lookup(&config_name_for_path, path);
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if (path_option) {
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ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util);
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if (ignore_option)
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handle_ignore_submodules_arg(diffopt, ignore_option->util);
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else if (gitmodules_is_unmerged)
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DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
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}
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}
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int submodule_config(const char *var, const char *value, void *cb)
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{
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if (!prefixcmp(var, "submodule."))
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return parse_submodule_config_option(var, value);
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else if (!strcmp(var, "fetch.recursesubmodules")) {
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config_fetch_recurse_submodules = parse_fetch_recurse_submodules_arg(var, value);
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return 0;
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}
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return 0;
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}
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void gitmodules_config(void)
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{
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const char *work_tree = get_git_work_tree();
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if (work_tree) {
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struct strbuf gitmodules_path = STRBUF_INIT;
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int pos;
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strbuf_addstr(&gitmodules_path, work_tree);
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strbuf_addstr(&gitmodules_path, "/.gitmodules");
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if (read_cache() < 0)
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die("index file corrupt");
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pos = cache_name_pos(".gitmodules", 11);
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if (pos < 0) { /* .gitmodules not found or isn't merged */
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pos = -1 - pos;
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if (active_nr > pos) { /* there is a .gitmodules */
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const struct cache_entry *ce = active_cache[pos];
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if (ce_namelen(ce) == 11 &&
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!memcmp(ce->name, ".gitmodules", 11))
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gitmodules_is_unmerged = 1;
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}
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}
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if (!gitmodules_is_unmerged)
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git_config_from_file(submodule_config, gitmodules_path.buf, NULL);
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strbuf_release(&gitmodules_path);
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}
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}
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int parse_submodule_config_option(const char *var, const char *value)
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{
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int len;
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struct string_list_item *config;
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struct strbuf submodname = STRBUF_INIT;
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var += 10; /* Skip "submodule." */
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len = strlen(var);
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if ((len > 5) && !strcmp(var + len - 5, ".path")) {
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strbuf_add(&submodname, var, len - 5);
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config = unsorted_string_list_lookup(&config_name_for_path, value);
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if (config)
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free(config->util);
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else
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config = string_list_append(&config_name_for_path, xstrdup(value));
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config->util = strbuf_detach(&submodname, NULL);
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strbuf_release(&submodname);
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} else if ((len > 23) && !strcmp(var + len - 23, ".fetchrecursesubmodules")) {
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strbuf_add(&submodname, var, len - 23);
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config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, submodname.buf);
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if (!config)
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config = string_list_append(&config_fetch_recurse_submodules_for_name,
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strbuf_detach(&submodname, NULL));
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config->util = (void *)(intptr_t)parse_fetch_recurse_submodules_arg(var, value);
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strbuf_release(&submodname);
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} else if ((len > 7) && !strcmp(var + len - 7, ".ignore")) {
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if (strcmp(value, "untracked") && strcmp(value, "dirty") &&
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strcmp(value, "all") && strcmp(value, "none")) {
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warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var);
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return 0;
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}
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strbuf_add(&submodname, var, len - 7);
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config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf);
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if (config)
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free(config->util);
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else
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config = string_list_append(&config_ignore_for_name,
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strbuf_detach(&submodname, NULL));
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strbuf_release(&submodname);
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config->util = xstrdup(value);
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return 0;
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}
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return 0;
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}
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void handle_ignore_submodules_arg(struct diff_options *diffopt,
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const char *arg)
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{
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DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES);
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DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
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DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES);
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if (!strcmp(arg, "all"))
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DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
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else if (!strcmp(arg, "untracked"))
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DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
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else if (!strcmp(arg, "dirty"))
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DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
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else if (strcmp(arg, "none"))
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die("bad --ignore-submodules argument: %s", arg);
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}
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static int prepare_submodule_summary(struct rev_info *rev, const char *path,
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struct commit *left, struct commit *right,
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int *fast_forward, int *fast_backward)
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{
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struct commit_list *merge_bases, *list;
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init_revisions(rev, NULL);
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setup_revisions(0, NULL, rev, NULL);
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rev->left_right = 1;
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rev->first_parent_only = 1;
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left->object.flags |= SYMMETRIC_LEFT;
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add_pending_object(rev, &left->object, path);
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add_pending_object(rev, &right->object, path);
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merge_bases = get_merge_bases(left, right, 1);
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if (merge_bases) {
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if (merge_bases->item == left)
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*fast_forward = 1;
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else if (merge_bases->item == right)
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*fast_backward = 1;
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}
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for (list = merge_bases; list; list = list->next) {
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list->item->object.flags |= UNINTERESTING;
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add_pending_object(rev, &list->item->object,
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sha1_to_hex(list->item->object.sha1));
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}
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return prepare_revision_walk(rev);
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}
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static void print_submodule_summary(struct rev_info *rev, FILE *f,
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const char *del, const char *add, const char *reset)
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{
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static const char format[] = " %m %s";
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struct strbuf sb = STRBUF_INIT;
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struct commit *commit;
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while ((commit = get_revision(rev))) {
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struct pretty_print_context ctx = {0};
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ctx.date_mode = rev->date_mode;
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strbuf_setlen(&sb, 0);
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if (commit->object.flags & SYMMETRIC_LEFT) {
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if (del)
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strbuf_addstr(&sb, del);
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}
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else if (add)
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strbuf_addstr(&sb, add);
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format_commit_message(commit, format, &sb, &ctx);
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if (reset)
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strbuf_addstr(&sb, reset);
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strbuf_addch(&sb, '\n');
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fprintf(f, "%s", sb.buf);
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}
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strbuf_release(&sb);
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}
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int parse_fetch_recurse_submodules_arg(const char *opt, const char *arg)
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{
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switch (git_config_maybe_bool(opt, arg)) {
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case 1:
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return RECURSE_SUBMODULES_ON;
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case 0:
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return RECURSE_SUBMODULES_OFF;
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default:
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if (!strcmp(arg, "on-demand"))
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return RECURSE_SUBMODULES_ON_DEMAND;
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die("bad %s argument: %s", opt, arg);
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}
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}
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void show_submodule_summary(FILE *f, const char *path,
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unsigned char one[20], unsigned char two[20],
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unsigned dirty_submodule,
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const char *del, const char *add, const char *reset)
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{
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struct rev_info rev;
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struct commit *left = left, *right = right;
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const char *message = NULL;
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struct strbuf sb = STRBUF_INIT;
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int fast_forward = 0, fast_backward = 0;
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if (is_null_sha1(two))
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message = "(submodule deleted)";
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else if (add_submodule_odb(path))
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message = "(not checked out)";
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else if (is_null_sha1(one))
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message = "(new submodule)";
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else if (!(left = lookup_commit_reference(one)) ||
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!(right = lookup_commit_reference(two)))
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message = "(commits not present)";
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if (!message &&
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prepare_submodule_summary(&rev, path, left, right,
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&fast_forward, &fast_backward))
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message = "(revision walker failed)";
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if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
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fprintf(f, "Submodule %s contains untracked content\n", path);
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if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
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fprintf(f, "Submodule %s contains modified content\n", path);
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if (!hashcmp(one, two)) {
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strbuf_release(&sb);
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return;
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}
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strbuf_addf(&sb, "Submodule %s %s..", path,
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find_unique_abbrev(one, DEFAULT_ABBREV));
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if (!fast_backward && !fast_forward)
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strbuf_addch(&sb, '.');
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strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
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if (message)
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strbuf_addf(&sb, " %s\n", message);
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else
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strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
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fwrite(sb.buf, sb.len, 1, f);
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if (!message) {
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print_submodule_summary(&rev, f, del, add, reset);
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clear_commit_marks(left, ~0);
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clear_commit_marks(right, ~0);
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}
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strbuf_release(&sb);
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}
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void set_config_fetch_recurse_submodules(int value)
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{
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config_fetch_recurse_submodules = value;
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}
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static int has_remote(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
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{
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return 1;
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}
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static int submodule_needs_pushing(const char *path, const unsigned char sha1[20])
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{
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if (add_submodule_odb(path) || !lookup_commit_reference(sha1))
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return 0;
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if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
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struct child_process cp;
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const char *argv[] = {"rev-list", NULL, "--not", "--remotes", "-n", "1" , NULL};
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struct strbuf buf = STRBUF_INIT;
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int needs_pushing = 0;
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argv[1] = sha1_to_hex(sha1);
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memset(&cp, 0, sizeof(cp));
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cp.argv = argv;
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cp.env = local_repo_env;
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cp.git_cmd = 1;
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cp.no_stdin = 1;
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cp.out = -1;
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cp.dir = path;
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if (start_command(&cp))
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die("Could not run 'git rev-list %s --not --remotes -n 1' command in submodule %s",
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sha1_to_hex(sha1), path);
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if (strbuf_read(&buf, cp.out, 41))
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needs_pushing = 1;
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finish_command(&cp);
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close(cp.out);
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strbuf_release(&buf);
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return needs_pushing;
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}
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return 0;
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}
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static void collect_submodules_from_diff(struct diff_queue_struct *q,
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struct diff_options *options,
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void *data)
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{
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int i;
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int *needs_pushing = data;
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for (i = 0; i < q->nr; i++) {
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struct diff_filepair *p = q->queue[i];
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if (!S_ISGITLINK(p->two->mode))
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continue;
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if (submodule_needs_pushing(p->two->path, p->two->sha1)) {
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*needs_pushing = 1;
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break;
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}
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}
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}
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static void commit_need_pushing(struct commit *commit, int *needs_pushing)
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{
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struct rev_info rev;
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init_revisions(&rev, NULL);
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rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
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rev.diffopt.format_callback = collect_submodules_from_diff;
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rev.diffopt.format_callback_data = needs_pushing;
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diff_tree_combined_merge(commit, 1, &rev);
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}
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int check_submodule_needs_pushing(unsigned char new_sha1[20], const char *remotes_name)
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{
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struct rev_info rev;
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struct commit *commit;
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const char *argv[] = {NULL, NULL, "--not", "NULL", NULL};
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int argc = ARRAY_SIZE(argv) - 1;
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char *sha1_copy;
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int needs_pushing = 0;
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struct strbuf remotes_arg = STRBUF_INIT;
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strbuf_addf(&remotes_arg, "--remotes=%s", remotes_name);
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init_revisions(&rev, NULL);
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sha1_copy = xstrdup(sha1_to_hex(new_sha1));
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argv[1] = sha1_copy;
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argv[3] = remotes_arg.buf;
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setup_revisions(argc, argv, &rev, NULL);
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if (prepare_revision_walk(&rev))
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die("revision walk setup failed");
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while ((commit = get_revision(&rev)) && !needs_pushing)
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commit_need_pushing(commit, &needs_pushing);
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free(sha1_copy);
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strbuf_release(&remotes_arg);
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return needs_pushing;
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}
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static int is_submodule_commit_present(const char *path, unsigned char sha1[20])
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{
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int is_present = 0;
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if (!add_submodule_odb(path) && lookup_commit_reference(sha1)) {
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/* Even if the submodule is checked out and the commit is
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* present, make sure it is reachable from a ref. */
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struct child_process cp;
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const char *argv[] = {"rev-list", "-n", "1", NULL, "--not", "--all", NULL};
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struct strbuf buf = STRBUF_INIT;
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argv[3] = sha1_to_hex(sha1);
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memset(&cp, 0, sizeof(cp));
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cp.argv = argv;
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cp.env = local_repo_env;
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cp.git_cmd = 1;
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cp.no_stdin = 1;
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cp.out = -1;
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cp.dir = path;
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if (!run_command(&cp) && !strbuf_read(&buf, cp.out, 1024))
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is_present = 1;
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close(cp.out);
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strbuf_release(&buf);
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}
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return is_present;
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}
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static void submodule_collect_changed_cb(struct diff_queue_struct *q,
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struct diff_options *options,
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void *data)
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{
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int i;
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for (i = 0; i < q->nr; i++) {
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struct diff_filepair *p = q->queue[i];
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if (!S_ISGITLINK(p->two->mode))
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continue;
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if (S_ISGITLINK(p->one->mode)) {
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/* NEEDSWORK: We should honor the name configured in
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* the .gitmodules file of the commit we are examining
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* here to be able to correctly follow submodules
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* being moved around. */
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struct string_list_item *path;
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path = unsorted_string_list_lookup(&changed_submodule_paths, p->two->path);
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if (!path && !is_submodule_commit_present(p->two->path, p->two->sha1))
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string_list_append(&changed_submodule_paths, xstrdup(p->two->path));
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} else {
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/* Submodule is new or was moved here */
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/* NEEDSWORK: When the .git directories of submodules
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* live inside the superprojects .git directory some
|
|
* day we should fetch new submodules directly into
|
|
* that location too when config or options request
|
|
* that so they can be checked out from there. */
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int add_sha1_to_array(const char *ref, const unsigned char *sha1,
|
|
int flags, void *data)
|
|
{
|
|
sha1_array_append(data, sha1);
|
|
return 0;
|
|
}
|
|
|
|
void check_for_new_submodule_commits(unsigned char new_sha1[20])
|
|
{
|
|
if (!initialized_fetch_ref_tips) {
|
|
for_each_ref(add_sha1_to_array, &ref_tips_before_fetch);
|
|
initialized_fetch_ref_tips = 1;
|
|
}
|
|
|
|
sha1_array_append(&ref_tips_after_fetch, new_sha1);
|
|
}
|
|
|
|
static void add_sha1_to_argv(const unsigned char sha1[20], void *data)
|
|
{
|
|
argv_array_push(data, sha1_to_hex(sha1));
|
|
}
|
|
|
|
static void calculate_changed_submodule_paths(void)
|
|
{
|
|
struct rev_info rev;
|
|
struct commit *commit;
|
|
struct argv_array argv = ARGV_ARRAY_INIT;
|
|
|
|
/* No need to check if there are no submodules configured */
|
|
if (!config_name_for_path.nr)
|
|
return;
|
|
|
|
init_revisions(&rev, NULL);
|
|
argv_array_push(&argv, "--"); /* argv[0] program name */
|
|
sha1_array_for_each_unique(&ref_tips_after_fetch,
|
|
add_sha1_to_argv, &argv);
|
|
argv_array_push(&argv, "--not");
|
|
sha1_array_for_each_unique(&ref_tips_before_fetch,
|
|
add_sha1_to_argv, &argv);
|
|
setup_revisions(argv.argc, argv.argv, &rev, NULL);
|
|
if (prepare_revision_walk(&rev))
|
|
die("revision walk setup failed");
|
|
|
|
/*
|
|
* Collect all submodules (whether checked out or not) for which new
|
|
* commits have been recorded upstream in "changed_submodule_paths".
|
|
*/
|
|
while ((commit = get_revision(&rev))) {
|
|
struct commit_list *parent = commit->parents;
|
|
while (parent) {
|
|
struct diff_options diff_opts;
|
|
diff_setup(&diff_opts);
|
|
DIFF_OPT_SET(&diff_opts, RECURSIVE);
|
|
diff_opts.output_format |= DIFF_FORMAT_CALLBACK;
|
|
diff_opts.format_callback = submodule_collect_changed_cb;
|
|
if (diff_setup_done(&diff_opts) < 0)
|
|
die("diff_setup_done failed");
|
|
diff_tree_sha1(parent->item->object.sha1, commit->object.sha1, "", &diff_opts);
|
|
diffcore_std(&diff_opts);
|
|
diff_flush(&diff_opts);
|
|
parent = parent->next;
|
|
}
|
|
}
|
|
|
|
argv_array_clear(&argv);
|
|
sha1_array_clear(&ref_tips_before_fetch);
|
|
sha1_array_clear(&ref_tips_after_fetch);
|
|
initialized_fetch_ref_tips = 0;
|
|
}
|
|
|
|
int fetch_populated_submodules(int num_options, const char **options,
|
|
const char *prefix, int command_line_option,
|
|
int quiet)
|
|
{
|
|
int i, result = 0, argc = 0, default_argc;
|
|
struct child_process cp;
|
|
const char **argv;
|
|
struct string_list_item *name_for_path;
|
|
const char *work_tree = get_git_work_tree();
|
|
if (!work_tree)
|
|
goto out;
|
|
|
|
if (!the_index.initialized)
|
|
if (read_cache() < 0)
|
|
die("index file corrupt");
|
|
|
|
/* 6: "fetch" (options) --recurse-submodules-default default "--submodule-prefix" prefix NULL */
|
|
argv = xcalloc(num_options + 6, sizeof(const char *));
|
|
argv[argc++] = "fetch";
|
|
for (i = 0; i < num_options; i++)
|
|
argv[argc++] = options[i];
|
|
argv[argc++] = "--recurse-submodules-default";
|
|
default_argc = argc++;
|
|
argv[argc++] = "--submodule-prefix";
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
cp.argv = argv;
|
|
cp.env = local_repo_env;
|
|
cp.git_cmd = 1;
|
|
cp.no_stdin = 1;
|
|
|
|
calculate_changed_submodule_paths();
|
|
|
|
for (i = 0; i < active_nr; i++) {
|
|
struct strbuf submodule_path = STRBUF_INIT;
|
|
struct strbuf submodule_git_dir = STRBUF_INIT;
|
|
struct strbuf submodule_prefix = STRBUF_INIT;
|
|
struct cache_entry *ce = active_cache[i];
|
|
const char *git_dir, *name, *default_argv;
|
|
|
|
if (!S_ISGITLINK(ce->ce_mode))
|
|
continue;
|
|
|
|
name = ce->name;
|
|
name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
|
|
if (name_for_path)
|
|
name = name_for_path->util;
|
|
|
|
default_argv = "yes";
|
|
if (command_line_option == RECURSE_SUBMODULES_DEFAULT) {
|
|
struct string_list_item *fetch_recurse_submodules_option;
|
|
fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
|
|
if (fetch_recurse_submodules_option) {
|
|
if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_OFF)
|
|
continue;
|
|
if ((intptr_t)fetch_recurse_submodules_option->util == RECURSE_SUBMODULES_ON_DEMAND) {
|
|
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
|
|
continue;
|
|
default_argv = "on-demand";
|
|
}
|
|
} else {
|
|
if ((config_fetch_recurse_submodules == RECURSE_SUBMODULES_OFF) ||
|
|
gitmodules_is_unmerged)
|
|
continue;
|
|
if (config_fetch_recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) {
|
|
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
|
|
continue;
|
|
default_argv = "on-demand";
|
|
}
|
|
}
|
|
} else if (command_line_option == RECURSE_SUBMODULES_ON_DEMAND) {
|
|
if (!unsorted_string_list_lookup(&changed_submodule_paths, ce->name))
|
|
continue;
|
|
default_argv = "on-demand";
|
|
}
|
|
|
|
strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
|
|
strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
|
|
strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name);
|
|
git_dir = read_gitfile(submodule_git_dir.buf);
|
|
if (!git_dir)
|
|
git_dir = submodule_git_dir.buf;
|
|
if (is_directory(git_dir)) {
|
|
if (!quiet)
|
|
printf("Fetching submodule %s%s\n", prefix, ce->name);
|
|
cp.dir = submodule_path.buf;
|
|
argv[default_argc] = default_argv;
|
|
argv[argc] = submodule_prefix.buf;
|
|
if (run_command(&cp))
|
|
result = 1;
|
|
}
|
|
strbuf_release(&submodule_path);
|
|
strbuf_release(&submodule_git_dir);
|
|
strbuf_release(&submodule_prefix);
|
|
}
|
|
free(argv);
|
|
out:
|
|
string_list_clear(&changed_submodule_paths, 1);
|
|
return result;
|
|
}
|
|
|
|
unsigned is_submodule_modified(const char *path, int ignore_untracked)
|
|
{
|
|
ssize_t len;
|
|
struct child_process cp;
|
|
const char *argv[] = {
|
|
"status",
|
|
"--porcelain",
|
|
NULL,
|
|
NULL,
|
|
};
|
|
struct strbuf buf = STRBUF_INIT;
|
|
unsigned dirty_submodule = 0;
|
|
const char *line, *next_line;
|
|
const char *git_dir;
|
|
|
|
strbuf_addf(&buf, "%s/.git", path);
|
|
git_dir = read_gitfile(buf.buf);
|
|
if (!git_dir)
|
|
git_dir = buf.buf;
|
|
if (!is_directory(git_dir)) {
|
|
strbuf_release(&buf);
|
|
/* The submodule is not checked out, so it is not modified */
|
|
return 0;
|
|
|
|
}
|
|
strbuf_reset(&buf);
|
|
|
|
if (ignore_untracked)
|
|
argv[2] = "-uno";
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
cp.argv = argv;
|
|
cp.env = local_repo_env;
|
|
cp.git_cmd = 1;
|
|
cp.no_stdin = 1;
|
|
cp.out = -1;
|
|
cp.dir = path;
|
|
if (start_command(&cp))
|
|
die("Could not run 'git status --porcelain' in submodule %s", path);
|
|
|
|
len = strbuf_read(&buf, cp.out, 1024);
|
|
line = buf.buf;
|
|
while (len > 2) {
|
|
if ((line[0] == '?') && (line[1] == '?')) {
|
|
dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
|
|
if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
|
|
break;
|
|
} else {
|
|
dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
|
|
if (ignore_untracked ||
|
|
(dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
|
|
break;
|
|
}
|
|
next_line = strchr(line, '\n');
|
|
if (!next_line)
|
|
break;
|
|
next_line++;
|
|
len -= (next_line - line);
|
|
line = next_line;
|
|
}
|
|
close(cp.out);
|
|
|
|
if (finish_command(&cp))
|
|
die("'git status --porcelain' failed in submodule %s", path);
|
|
|
|
strbuf_release(&buf);
|
|
return dirty_submodule;
|
|
}
|
|
|
|
static int find_first_merges(struct object_array *result, const char *path,
|
|
struct commit *a, struct commit *b)
|
|
{
|
|
int i, j;
|
|
struct object_array merges;
|
|
struct commit *commit;
|
|
int contains_another;
|
|
|
|
char merged_revision[42];
|
|
const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path",
|
|
"--all", merged_revision, NULL };
|
|
struct rev_info revs;
|
|
struct setup_revision_opt rev_opts;
|
|
|
|
memset(&merges, 0, sizeof(merges));
|
|
memset(result, 0, sizeof(struct object_array));
|
|
memset(&rev_opts, 0, sizeof(rev_opts));
|
|
|
|
/* get all revisions that merge commit a */
|
|
snprintf(merged_revision, sizeof(merged_revision), "^%s",
|
|
sha1_to_hex(a->object.sha1));
|
|
init_revisions(&revs, NULL);
|
|
rev_opts.submodule = path;
|
|
setup_revisions(sizeof(rev_args)/sizeof(char *)-1, rev_args, &revs, &rev_opts);
|
|
|
|
/* save all revisions from the above list that contain b */
|
|
if (prepare_revision_walk(&revs))
|
|
die("revision walk setup failed");
|
|
while ((commit = get_revision(&revs)) != NULL) {
|
|
struct object *o = &(commit->object);
|
|
if (in_merge_bases(b, &commit, 1))
|
|
add_object_array(o, NULL, &merges);
|
|
}
|
|
|
|
/* Now we've got all merges that contain a and b. Prune all
|
|
* merges that contain another found merge and save them in
|
|
* result.
|
|
*/
|
|
for (i = 0; i < merges.nr; i++) {
|
|
struct commit *m1 = (struct commit *) merges.objects[i].item;
|
|
|
|
contains_another = 0;
|
|
for (j = 0; j < merges.nr; j++) {
|
|
struct commit *m2 = (struct commit *) merges.objects[j].item;
|
|
if (i != j && in_merge_bases(m2, &m1, 1)) {
|
|
contains_another = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!contains_another)
|
|
add_object_array(merges.objects[i].item,
|
|
merges.objects[i].name, result);
|
|
}
|
|
|
|
free(merges.objects);
|
|
return result->nr;
|
|
}
|
|
|
|
static void print_commit(struct commit *commit)
|
|
{
|
|
struct strbuf sb = STRBUF_INIT;
|
|
struct pretty_print_context ctx = {0};
|
|
ctx.date_mode = DATE_NORMAL;
|
|
format_commit_message(commit, " %h: %m %s", &sb, &ctx);
|
|
fprintf(stderr, "%s\n", sb.buf);
|
|
strbuf_release(&sb);
|
|
}
|
|
|
|
#define MERGE_WARNING(path, msg) \
|
|
warning("Failed to merge submodule %s (%s)", path, msg);
|
|
|
|
int merge_submodule(unsigned char result[20], const char *path,
|
|
const unsigned char base[20], const unsigned char a[20],
|
|
const unsigned char b[20], int search)
|
|
{
|
|
struct commit *commit_base, *commit_a, *commit_b;
|
|
int parent_count;
|
|
struct object_array merges;
|
|
|
|
int i;
|
|
|
|
/* store a in result in case we fail */
|
|
hashcpy(result, a);
|
|
|
|
/* we can not handle deletion conflicts */
|
|
if (is_null_sha1(base))
|
|
return 0;
|
|
if (is_null_sha1(a))
|
|
return 0;
|
|
if (is_null_sha1(b))
|
|
return 0;
|
|
|
|
if (add_submodule_odb(path)) {
|
|
MERGE_WARNING(path, "not checked out");
|
|
return 0;
|
|
}
|
|
|
|
if (!(commit_base = lookup_commit_reference(base)) ||
|
|
!(commit_a = lookup_commit_reference(a)) ||
|
|
!(commit_b = lookup_commit_reference(b))) {
|
|
MERGE_WARNING(path, "commits not present");
|
|
return 0;
|
|
}
|
|
|
|
/* check whether both changes are forward */
|
|
if (!in_merge_bases(commit_base, &commit_a, 1) ||
|
|
!in_merge_bases(commit_base, &commit_b, 1)) {
|
|
MERGE_WARNING(path, "commits don't follow merge-base");
|
|
return 0;
|
|
}
|
|
|
|
/* Case #1: a is contained in b or vice versa */
|
|
if (in_merge_bases(commit_a, &commit_b, 1)) {
|
|
hashcpy(result, b);
|
|
return 1;
|
|
}
|
|
if (in_merge_bases(commit_b, &commit_a, 1)) {
|
|
hashcpy(result, a);
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Case #2: There are one or more merges that contain a and b in
|
|
* the submodule. If there is only one, then present it as a
|
|
* suggestion to the user, but leave it marked unmerged so the
|
|
* user needs to confirm the resolution.
|
|
*/
|
|
|
|
/* Skip the search if makes no sense to the calling context. */
|
|
if (!search)
|
|
return 0;
|
|
|
|
/* find commit which merges them */
|
|
parent_count = find_first_merges(&merges, path, commit_a, commit_b);
|
|
switch (parent_count) {
|
|
case 0:
|
|
MERGE_WARNING(path, "merge following commits not found");
|
|
break;
|
|
|
|
case 1:
|
|
MERGE_WARNING(path, "not fast-forward");
|
|
fprintf(stderr, "Found a possible merge resolution "
|
|
"for the submodule:\n");
|
|
print_commit((struct commit *) merges.objects[0].item);
|
|
fprintf(stderr,
|
|
"If this is correct simply add it to the index "
|
|
"for example\n"
|
|
"by using:\n\n"
|
|
" git update-index --cacheinfo 160000 %s \"%s\"\n\n"
|
|
"which will accept this suggestion.\n",
|
|
sha1_to_hex(merges.objects[0].item->sha1), path);
|
|
break;
|
|
|
|
default:
|
|
MERGE_WARNING(path, "multiple merges found");
|
|
for (i = 0; i < merges.nr; i++)
|
|
print_commit((struct commit *) merges.objects[i].item);
|
|
}
|
|
|
|
free(merges.objects);
|
|
return 0;
|
|
}
|