xdiff: PATIENCE/HISTOGRAM are not independent option bits

diff --git a/submodule.c b/submodule.c
index ad86534ba1e1e1726fd6427c65182ba954957904..0fd10a0fdbf5d1af10819dea808b43f6b13b98a8 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -8,12 +8,18 @@
 #include "diffcore.h"
 #include "refs.h"
 #include "string-list.h"
+#include "sha1-array.h"
+#include "argv-array.h"
 
 static struct string_list config_name_for_path;
 static struct string_list config_fetch_recurse_submodules_for_name;
 static struct string_list config_ignore_for_name;
 static int config_fetch_recurse_submodules = RECURSE_SUBMODULES_ON_DEMAND;
 static struct string_list changed_submodule_paths;
+static int initialized_fetch_ref_tips;
+static struct sha1_array ref_tips_before_fetch;
+static struct sha1_array ref_tips_after_fetch;
+
 /*
  * The following flag is set if the .gitmodules file is unmerged. We then
  * disable recursion for all submodules where .git/config doesn't have a
@@ -474,20 +480,46 @@ static void submodule_collect_changed_cb(struct diff_queue_struct *q,
        }
 }
 
+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;
-       const char *argv[] = {NULL, NULL, "--not", "--all", NULL};
-       int argc = ARRAY_SIZE(argv) - 1;
+       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[1] = xstrdup(sha1_to_hex(new_sha1));
-       setup_revisions(argc, argv, &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");
 
@@ -511,7 +543,11 @@ void check_for_new_submodule_commits(unsigned char new_sha1[20])
                        parent = parent->next;
                }
        }
-       free((char *)argv[1]);
+
+       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,
@@ -545,6 +581,8 @@ int fetch_populated_submodules(int num_options, const char **options,
        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;
@@ -756,7 +794,7 @@ static void print_commit(struct commit *commit)
 
 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])
+                   const unsigned char b[20], int search)
 {
        struct commit *commit_base, *commit_a, *commit_b;
        int parent_count;
@@ -811,6 +849,10 @@ int merge_submodule(unsigned char result[20], const char *path,
         * 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) {