Add --log-size to git log to print message size

With this option git-log prints log message size
just before the corresponding message.

Porcelain tools could use this to speedup parsing
of git-log output.

Note that size refers to log message only. If also
patch content is shown its size is not included.

In case it is not possible to know the size upfront
size value is set to zero.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index 63c1dbe..5a90f65 100644 (file)
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -64,6 +64,13 @@ include::pretty-options.txt[]
 --follow::
        Continue listing the history of a file beyond renames.
 
+--log-size::
+       Before the log message print out its size in bytes. Intended
+       mainly for porcelain tools consumption. If git is unable to
+       produce a valid value size is set to zero.
+       Note that only message is considered, if also a diff is shown
+       its size is not included.
+
 <paths>...::
        Show only commits that affect the specified paths.
 

diff --git a/log-tree.c b/log-tree.c
index 8624d5a..a642371 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -295,6 +295,9 @@ void show_log(struct rev_info *opt, const char *sep)
        if (opt->add_signoff)
                len = append_signoff(&msgbuf, &msgbuf_len, len,
                                     opt->add_signoff);
+       if (opt->show_log_size)
+               printf("log size %i\n", len);
+
        printf("%s%s%s", msgbuf, extra, sep);
        free(msgbuf);
 }

diff --git a/revision.c b/revision.c
index 038693c..7d32a89 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -1150,6 +1150,10 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                                        die("unknown date format %s", arg);
                                continue;
                        }
+                       if (!strcmp(arg, "--log-size")) {
+                               revs->show_log_size = 1;
+                               continue;
+                       }
 
                        /*
                         * Grepping the commit log

diff --git a/revision.h b/revision.h
index f46b4d5..98a0a8f 100644 (file)
--- a/revision.h
+++ b/revision.h
@@ -81,6 +81,7 @@ struct rev_info {
        const char      *log_reencode;
        const char      *subject_prefix;
        int             no_inline;
+       int             show_log_size;
 
        /* Filter by commit log message */
        struct grep_opt *grep_filter;