read-cache/write-cache: optionally return cache checksum SHA1.

diff --git a/rev-list.c b/rev-list.c
index 22141e2b045bb4e54709ec16c83942fcfdd44ed2..8b0ec388fa0afe5ffb28c94f2e75544612ab7265 100644 (file)
--- a/rev-list.c
+++ b/rev-list.c
@@ -5,11 +5,12 @@
 #include "tree.h"
 #include "blob.h"
 #include "tree-walk.h"
+#include "diff.h"
 #include "revision.h"
 
-/* bits #0-5 in revision.h */
+/* bits #0-15 in revision.h */
 
-#define COUNTED                (1u<<6)
+#define COUNTED                (1u<<16)
 
 static const char rev_list_usage[] =
 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
@@ -30,6 +31,7 @@ static const char rev_list_usage[] =
 "    --unpacked\n"
 "    --header | --pretty\n"
 "    --abbrev=nr | --no-abbrev\n"
+"    --abbrev-commit\n"
 "  special purpose:\n"
 "    --bisect"
 ;
@@ -37,22 +39,23 @@ static const char rev_list_usage[] =
 struct rev_info revs;
 
 static int bisect_list = 0;
-static int verbose_header = 0;
-static int abbrev = DEFAULT_ABBREV;
 static int show_timestamp = 0;
 static int hdr_termination = 0;
-static const char *commit_prefix = "";
-static enum cmit_fmt commit_format = CMIT_FMT_RAW;
+static const char *header_prefix;
 
 static void show_commit(struct commit *commit)
 {
        if (show_timestamp)
                printf("%lu ", commit->date);
-       if (commit_prefix[0])
-               fputs(commit_prefix, stdout);
+       if (header_prefix)
+               fputs(header_prefix, stdout);
        if (commit->object.flags & BOUNDARY)
                putchar('-');
-       fputs(sha1_to_hex(commit->object.sha1), stdout);
+       if (revs.abbrev_commit && revs.abbrev)
+               fputs(find_unique_abbrev(commit->object.sha1, revs.abbrev),
+                     stdout);
+       else
+               fputs(sha1_to_hex(commit->object.sha1), stdout);
        if (revs.parents) {
                struct commit_list *parents = commit->parents;
                while (parents) {
@@ -72,14 +75,16 @@ static void show_commit(struct commit *commit)
                     parents = parents->next)
                        parents->item->object.flags &= ~TMP_MARK;
        }
-       if (commit_format == CMIT_FMT_ONELINE)
+       if (revs.commit_format == CMIT_FMT_ONELINE)
                putchar(' ');
        else
                putchar('\n');
 
-       if (verbose_header) {
+       if (revs.verbose_header) {
                static char pretty_header[16384];
-               pretty_print_commit(commit_format, commit, ~0, pretty_header, sizeof(pretty_header), abbrev);
+               pretty_print_commit(revs.commit_format, commit, ~0,
+                                   pretty_header, sizeof(pretty_header),
+                                   revs.abbrev);
                printf("%s%c", pretty_header, hdr_termination);
        }
        fflush(stdout);
@@ -291,50 +296,16 @@ int main(int argc, const char **argv)
        struct commit_list *list;
        int i;
 
+       init_revisions(&revs);
+       revs.abbrev = 0;
+       revs.commit_format = CMIT_FMT_UNSPECIFIED;
        argc = setup_revisions(argc, argv, &revs, NULL);
 
        for (i = 1 ; i < argc; i++) {
                const char *arg = argv[i];
 
-               /* accept -<digit>, like traditilnal "head" */
-               if ((*arg == '-') && isdigit(arg[1])) {
-                       revs.max_count = atoi(arg + 1);
-                       continue;
-               }
-               if (!strcmp(arg, "-n")) {
-                       if (++i >= argc)
-                               die("-n requires an argument");
-                       revs.max_count = atoi(argv[i]);
-                       continue;
-               }
-               if (!strncmp(arg,"-n",2)) {
-                       revs.max_count = atoi(arg + 2);
-                       continue;
-               }
                if (!strcmp(arg, "--header")) {
-                       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;
-                       hdr_termination = '\n';
-                       if (commit_format == CMIT_FMT_ONELINE)
-                               commit_prefix = "";
-                       else
-                               commit_prefix = "commit ";
+                       revs.verbose_header = 1;
                        continue;
                }
                if (!strcmp(arg, "--timestamp")) {
@@ -348,15 +319,30 @@ int main(int argc, const char **argv)
                usage(rev_list_usage);
 
        }
+       if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
+               /* The command line has a --pretty  */
+               hdr_termination = '\n';
+               if (revs.commit_format == CMIT_FMT_ONELINE)
+                       header_prefix = "";
+               else
+                       header_prefix = "commit ";
+       }
+       else if (revs.verbose_header)
+               /* Only --header was specified */
+               revs.commit_format = CMIT_FMT_RAW;
 
        list = revs.commits;
 
-       if (!list &&
-           (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) && !revs.pending_objects))
+       if ((!list &&
+            (!(revs.tag_objects||revs.tree_objects||revs.blob_objects) &&
+             !revs.pending_objects)) ||
+           revs.diff)
                usage(rev_list_usage);
 
-       save_commit_buffer = verbose_header;
+       save_commit_buffer = revs.verbose_header;
        track_object_refs = 0;
+       if (bisect_list)
+               revs.limited = 1;
 
        prepare_revision_walk(&revs);
        if (revs.tree_objects)