reset.c: extract function for updating {ORIG_,}HEAD

diff --git a/builtin/log.c b/builtin/log.c
index 09cf43e6d40efc13f6b7bda2094fca5bdc1bbc87..3899b1d43acc8c51e7609be94469eac057116440 100644 (file)
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -351,7 +351,8 @@ static int git_log_config(const char *var, const char *value, void *cb)
        }
        if (!prefixcmp(var, "color.decorate."))
                return parse_decorate_color_config(var, 15, value);
-
+       if (grep_config(var, value, cb) < 0)
+               return -1;
        return git_diff_ui_config(var, value, cb);
 }
 
@@ -360,6 +361,7 @@ int cmd_whatchanged(int argc, const char **argv, const char *prefix)
        struct rev_info rev;
        struct setup_revision_opt opt;
 
+       init_grep_defaults();
        git_config(git_log_config, NULL);
 
        init_revisions(&rev, prefix);
@@ -450,6 +452,7 @@ int cmd_show(int argc, const char **argv, const char *prefix)
        struct pathspec match_all;
        int i, count, ret = 0;
 
+       init_grep_defaults();
        git_config(git_log_config, NULL);
 
        init_pathspec(&match_all, NULL);
@@ -530,6 +533,7 @@ int cmd_log_reflog(int argc, const char **argv, const char *prefix)
        struct rev_info rev;
        struct setup_revision_opt opt;
 
+       init_grep_defaults();
        git_config(git_log_config, NULL);
 
        init_revisions(&rev, prefix);
@@ -552,6 +556,7 @@ int cmd_log(int argc, const char **argv, const char *prefix)
        struct rev_info rev;
        struct setup_revision_opt opt;
 
+       init_grep_defaults();
        git_config(git_log_config, NULL);
 
        init_revisions(&rev, prefix);
@@ -1011,8 +1016,9 @@ static char *find_branch_name(struct rev_info *rev)
 {
        int i, positive = -1;
        unsigned char branch_sha1[20];
-       struct strbuf buf = STRBUF_INIT;
-       const char *branch;
+       const unsigned char *tip_sha1;
+       const char *ref;
+       char *full_ref, *branch = NULL;
 
        for (i = 0; i < rev->cmdline.nr; i++) {
                if (rev->cmdline.rev[i].flags & UNINTERESTING)
@@ -1022,18 +1028,27 @@ static char *find_branch_name(struct rev_info *rev)
                else
                        return NULL;
        }
-       if (positive < 0)
+       if (0 <= positive) {
+               ref = rev->cmdline.rev[positive].name;
+               tip_sha1 = rev->cmdline.rev[positive].item->sha1;
+       } else if (!rev->cmdline.nr && rev->pending.nr == 1 &&
+                  !strcmp(rev->pending.objects[0].name, "HEAD")) {
+               /*
+                * No actual ref from command line, but "HEAD" from
+                * rev->def was added in setup_revisions()
+                * e.g. format-patch --cover-letter -12
+                */
+               ref = "HEAD";
+               tip_sha1 = rev->pending.objects[0].item->sha1;
+       } else {
                return NULL;
-       strbuf_addf(&buf, "refs/heads/%s", rev->cmdline.rev[positive].name);
-       branch = resolve_ref_unsafe(buf.buf, branch_sha1, 1, NULL);
-       if (!branch ||
-           prefixcmp(branch, "refs/heads/") ||
-           hashcmp(rev->cmdline.rev[positive].item->sha1, branch_sha1))
-               branch = NULL;
-       strbuf_release(&buf);
-       if (branch)
-               return xstrdup(rev->cmdline.rev[positive].name);
-       return NULL;
+       }
+       if (dwim_ref(ref, strlen(ref), branch_sha1, &full_ref) &&
+           !prefixcmp(full_ref, "refs/heads/") &&
+           !hashcmp(tip_sha1, branch_sha1))
+               branch = xstrdup(full_ref + strlen("refs/heads/"));
+       free(full_ref);
+       return branch;
 }
 
 int cmd_format_patch(int argc, const char **argv, const char *prefix)
@@ -1121,6 +1136,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
        extra_hdr.strdup_strings = 1;
        extra_to.strdup_strings = 1;
        extra_cc.strdup_strings = 1;
+       init_grep_defaults();
        git_config(git_format_config, NULL);
        init_revisions(&rev, prefix);
        rev.commit_format = CMIT_FMT_EMAIL;