Document git read-tree --trivial

diff --git a/builtin-name-rev.c b/builtin-name-rev.c
index d44e782c999eeaf59ec661047eb95544a29dc072..61eba343ab781341a0baf127b323508a0c2af332 100644 (file)
--- a/builtin-name-rev.c
+++ b/builtin-name-rev.c
@@ -1,12 +1,13 @@
-#include <stdlib.h>
 #include "builtin.h"
 #include "cache.h"
 #include "commit.h"
 #include "tag.h"
 #include "refs.h"
 
+#define CUTOFF_DATE_SLOP 86400 /* one day */
+
 static const char name_rev_usage[] =
-       "git-name-rev [--tags] ( --all | --stdin | committish [committish...] )\n";
+       "git-name-rev [--tags | --refs=<pattern>] ( --all | --stdin | committish [committish...] )\n";
 
 typedef struct rev_name {
        const char *tip_name;
@@ -58,13 +59,20 @@ static void name_rev(struct commit *commit,
                        parents;
                        parents = parents->next, parent_number++) {
                if (parent_number > 1) {
-                       char *new_name = xmalloc(strlen(tip_name)+8);
-
+                       int len = strlen(tip_name);
+                       char *new_name = xmalloc(len +
+                               1 + decimal_length(generation) +  /* ~<n> */
+                               1 + 2 +                           /* ^NN */
+                               1);
+
+                       if (len > 2 && !strcmp(tip_name + len - 2, "^0"))
+                               len -= 2;
                        if (generation > 0)
-                               sprintf(new_name, "%s~%d^%d", tip_name,
+                               sprintf(new_name, "%.*s~%d^%d", len, tip_name,
                                                generation, parent_number);
                        else
-                               sprintf(new_name, "%s^%d", tip_name, parent_number);
+                               sprintf(new_name, "%.*s^%d", len, tip_name,
+                                               parent_number);
 
                        name_rev(parents->item, new_name,
                                merge_traversals + 1 , 0, 0);
@@ -75,14 +83,22 @@ static void name_rev(struct commit *commit,
        }
 }
 
-static int tags_only;
+struct name_ref_data {
+       int tags_only;
+       int name_only;
+       const char *ref_filter;
+};
 
-static int name_ref(const char *path, const unsigned char *sha1)
+static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data)
 {
        struct object *o = parse_object(sha1);
+       struct name_ref_data *data = cb_data;
        int deref = 0;
 
-       if (tags_only && strncmp(path, "refs/tags/", 10))
+       if (data->tags_only && prefixcmp(path, "refs/tags/"))
+               return 0;
+
+       if (data->ref_filter && fnmatch(data->ref_filter, path, 0))
                return 0;
 
        while (o && o->type == OBJ_TAG) {
@@ -95,12 +111,16 @@ static int name_ref(const char *path, const unsigned char *sha1)
        if (o && o->type == OBJ_COMMIT) {
                struct commit *commit = (struct commit *)o;
 
-               if (!strncmp(path, "refs/heads/", 11))
+               if (!prefixcmp(path, "refs/heads/"))
                        path = path + 11;
-               else if (!strncmp(path, "refs/", 5))
+               else if (data->tags_only
+                   && data->name_only
+                   && !prefixcmp(path, "refs/tags/"))
+                       path = path + 10;
+               else if (!prefixcmp(path, "refs/"))
                        path = path + 5;
 
-               name_rev(commit, strdup(path), 0, 0, deref);
+               name_rev(commit, xstrdup(path), 0, 0, deref);
        }
        return 0;
 }
@@ -121,16 +141,22 @@ static const char* get_rev_name(struct object *o)
 
        if (!n->generation)
                return n->tip_name;
-
-       snprintf(buffer, sizeof(buffer), "%s~%d", n->tip_name, n->generation);
-
-       return buffer;
+       else {
+               int len = strlen(n->tip_name);
+               if (len > 2 && !strcmp(n->tip_name + len - 2, "^0"))
+                       len -= 2;
+               snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name,
+                               n->generation);
+
+               return buffer;
+       }
 }
 
 int cmd_name_rev(int argc, const char **argv, const char *prefix)
 {
        struct object_array revs = { 0, 0, NULL };
        int as_is = 0, all = 0, transform_stdin = 0;
+       struct name_ref_data data = { 0, 0, NULL };
 
        git_config(git_default_config);
 
@@ -146,8 +172,14 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
                        if (!strcmp(*argv, "--")) {
                                as_is = 1;
                                continue;
+                       } else if (!strcmp(*argv, "--name-only")) {
+                               data.name_only = 1;
+                               continue;
                        } else if (!strcmp(*argv, "--tags")) {
-                               tags_only = 1;
+                               data.tags_only = 1;
+                               continue;
+                       } else  if (!prefixcmp(*argv, "--refs=")) {
+                               data.ref_filter = *argv + 7;
                                continue;
                        } else if (!strcmp(*argv, "--all")) {
                                if (argc > 1)
@@ -186,7 +218,9 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
                add_object_array((struct object *)commit, *argv, &revs);
        }
 
-       for_each_ref(name_ref);
+       if (cutoff)
+               cutoff = cutoff - CUTOFF_DATE_SLOP;
+       for_each_ref(name_ref, &data);
 
        if (transform_stdin) {
                char buffer[2048];
@@ -241,16 +275,18 @@ int cmd_name_rev(int argc, const char **argv, const char *prefix)
                        struct object * obj = get_indexed_object(i);
                        if (!obj)
                                continue;
-                       printf("%s %s\n", sha1_to_hex(obj->sha1), get_rev_name(obj));
+                       if (!data.name_only)
+                               printf("%s ", sha1_to_hex(obj->sha1));
+                       printf("%s\n", get_rev_name(obj));
                }
        } else {
                int i;
-               for (i = 0; i < revs.nr; i++)
-                       printf("%s %s\n",
-                               revs.objects[i].name,
-                               get_rev_name(revs.objects[i].item));
+               for (i = 0; i < revs.nr; i++) {
+                       if (!data.name_only)
+                               printf("%s ", revs.objects[i].name);
+                       printf("%s\n", get_rev_name(revs.objects[i].item));
+               }
        }
 
        return 0;
 }
-