Fixes for ancient versions of GNU make

[git.git] / rev-list.c

diff --git a/rev-list.c b/rev-list.c
index 1bc1887..63391fc 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -12,6 +12,7 @@
 #define COUNTED                (1u << 2)
 #define SHOWN          (1u << 3)
 #define TREECHANGE     (1u << 4)
+#define TMP_MARK       (1u << 5) /* for isolated cases; clean after use */
 
 static const char rev_list_usage[] =
 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
@@ -31,6 +32,7 @@ static const char rev_list_usage[] =
 "    --objects\n"
 "    --unpacked\n"
 "    --header | --pretty\n"
+"    --abbrev=nr | --no-abbrev\n"
 "  special purpose:\n"
 "    --bisect"
 ;
@@ -42,6 +44,7 @@ static int tag_objects = 0;
 static int tree_objects = 0;
 static int blob_objects = 0;
 static int verbose_header = 0;
+static int abbrev = DEFAULT_ABBREV;
 static int show_parents = 0;
 static int hdr_termination = 0;
 static const char *commit_prefix = "";
@@ -72,9 +75,21 @@ static void show_commit(struct commit *commit)
        if (show_parents) {
                struct commit_list *parents = commit->parents;
                while (parents) {
-                       printf(" %s", sha1_to_hex(parents->item->object.sha1));
+                       struct object *o = &(parents->item->object);
                        parents = parents->next;
+                       if (o->flags & TMP_MARK)
+                               continue;
+                       printf(" %s", sha1_to_hex(o->sha1));
+                       o->flags |= TMP_MARK;
                }
+               /* TMP_MARK is a general purpose flag that can
+                * be used locally, but the user should clean
+                * things up after it is done with them.
+                */
+               for (parents = commit->parents;
+                    parents;
+                    parents = parents->next)
+                       parents->item->object.flags &= ~TMP_MARK;
        }
        if (commit_format == CMIT_FMT_ONELINE)
                putchar(' ');
@@ -83,7 +98,7 @@ static void show_commit(struct commit *commit)
 
        if (verbose_header) {
                static char pretty_header[16384];
-               pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), 0);
+               pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), abbrev);
                printf("%s%c", pretty_header, hdr_termination);
        }
        fflush(stdout);
@@ -782,6 +797,18 @@ int main(int argc, const char **argv)
                        verbose_header = 1;
                        continue;
                }
+               if (!strcmp(arg, "--no-abbrev")) {
+                       abbrev = 0;
+                       continue;
+               }
+               if (!strncmp(arg, "--abbrev=", 9)) {
+                       abbrev = strtoul(arg + 9, NULL, 10);
+                       if (abbrev && abbrev < MINIMUM_ABBREV)
+                               abbrev = MINIMUM_ABBREV;
+                       else if (40 < abbrev)
+                               abbrev = 40;
+                       continue;
+               }
                if (!strncmp(arg, "--pretty", 8)) {
                        commit_format = get_commit_format(arg+8);
                        verbose_header = 1;