diff: --full-index

A new option, --full-index, is introduced to diff family.  This
causes the full object name of pre- and post-images to appear on
the index line of patch formatted output, to be used in
conjunction with --allow-binary-replacement option of git-apply.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 8eef86e..6b496ed 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -13,6 +13,11 @@
 --name-status::
        Show only names and status of changed files.
 
+--full-index::
+       Instead of the first handful characters, show full
+       object name of pre- and post-image blob on the "index"
+       line when generating a patch format output.     
+
 -B::
        Break complete rewrite changes into pairs of delete and create.
 

diff --git a/diff.c b/diff.c
index fca61f3..0391e8c 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -650,7 +650,7 @@ static void diff_fill_sha1_info(struct diff_filespec *one)
                memset(one->sha1, 0, 20);
 }
 
-static void run_diff(struct diff_filepair *p)
+static void run_diff(struct diff_filepair *p, struct diff_options *o)
 {
        const char *pgm = external_diff();
        char msg[PATH_MAX*2+300], *xfrm_msg;
@@ -713,11 +713,11 @@ static void run_diff(struct diff_filepair *p)
 
        if (memcmp(one->sha1, two->sha1, 20)) {
                char one_sha1[41];
+               const char *index_fmt = o->full_index ? "index %s..%s" : "index %.7s..%.7s";
                memcpy(one_sha1, sha1_to_hex(one->sha1), 41);
 
                len += snprintf(msg + len, sizeof(msg) - len,
-                               "index %.7s..%.7s", one_sha1,
-                               sha1_to_hex(two->sha1));
+                               index_fmt, one_sha1, sha1_to_hex(two->sha1));
                if (one->mode == two->mode)
                        len += snprintf(msg + len, sizeof(msg) - len,
                                        " %06o", one->mode);
@@ -794,6 +794,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
                options->line_termination = 0;
        else if (!strncmp(arg, "-l", 2))
                options->rename_limit = strtoul(arg+2, NULL, 10);
+       else if (!strcmp(arg, "--full-index"))
+               options->full_index = 1;
        else if (!strcmp(arg, "--name-only"))
                options->output_format = DIFF_FORMAT_NAME;
        else if (!strcmp(arg, "--name-status"))
@@ -1022,7 +1024,7 @@ int diff_unmodified_pair(struct diff_filepair *p)
        return 0;
 }
 
-static void diff_flush_patch(struct diff_filepair *p)
+static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
 {
        if (diff_unmodified_pair(p))
                return;
@@ -1031,7 +1033,7 @@ static void diff_flush_patch(struct diff_filepair *p)
            (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode)))
                return; /* no tree diffs in patch format */ 
 
-       run_diff(p);
+       run_diff(p, o);
 }
 
 int diff_queue_is_empty(void)
@@ -1163,7 +1165,7 @@ void diff_flush(struct diff_options *options)
                        die("internal error in diff-resolve-rename-copy");
                switch (diff_output_format) {
                case DIFF_FORMAT_PATCH:
-                       diff_flush_patch(p);
+                       diff_flush_patch(p, options);
                        break;
                case DIFF_FORMAT_RAW:
                case DIFF_FORMAT_NAME_STATUS:

diff --git a/diff.h b/diff.h
index 1259079..9b2e1e6 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -32,7 +32,8 @@ struct diff_options {
        const char *orderfile;
        const char *pickaxe;
        unsigned recursive:1,
-                tree_in_recursive:1;
+                tree_in_recursive:1,
+                full_index:1;
        int break_opt;
        int detect_rename;
        int find_copies_harder;
@@ -96,6 +97,7 @@ extern void diffcore_std_no_resolve(struct diff_options *);
 "  -u            synonym for -p.\n" \
 "  --name-only   show only names of changed files.\n" \
 "  --name-status show names and status of changed files.\n" \
+"  --full-index  show full object name on index ines.\n" \
 "  -R            swap input file pairs.\n" \
 "  -B            detect complete rewrites.\n" \
 "  -M            detect renames.\n" \