log-tree.c: small refactor in show_signature()

The next patch needs to show the result of signature verification on a
mergetag extended header in a way similar to how embedded signature for
the commit object itself is shown. Separate out the logic to go through
the message lines and show them in the "error" color (highlighted) or the
"correct" color (dim).

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/log-tree.c b/log-tree.c
index 142ba5142782cde77477eeda6bc788d5c80bd3a3..005c5a51c08b046ed62034deeef0ea42967b1c1a 100644 (file)
--- a/log-tree.c
+++ b/log-tree.c
@@ -404,13 +404,27 @@ void log_write_email_headers(struct rev_info *opt, struct commit *commit,
        *extra_headers_p = extra_headers;
 }
 
+static void show_sig_lines(struct rev_info *opt, int status, const char *bol)
+{
+       const char *color, *reset, *eol;
+
+       color = diff_get_color_opt(&opt->diffopt,
+                                  status ? DIFF_WHITESPACE : DIFF_FRAGINFO);
+       reset = diff_get_color_opt(&opt->diffopt, DIFF_RESET);
+       while (*bol) {
+               eol = strchrnul(bol, '\n');
+               printf("%s%.*s%s%s", color, (int)(eol - bol), bol, reset,
+                      *eol ? "\n" : "");
+               bol = (*eol) ? (eol + 1) : eol;
+       }
+}
+
 static void show_signature(struct rev_info *opt, struct commit *commit)
 {
        struct strbuf payload = STRBUF_INIT;
        struct strbuf signature = STRBUF_INIT;
        struct strbuf gpg_output = STRBUF_INIT;
        int status;
-       const char *color, *reset, *bol, *eol;
 
        if (parse_signed_commit(commit->object.sha1, &payload, &signature) <= 0)
                goto out;
@@ -421,17 +435,7 @@ static void show_signature(struct rev_info *opt, struct commit *commit)
        if (status && !gpg_output.len)
                strbuf_addstr(&gpg_output, "No signature\n");
 
-       color = diff_get_color_opt(&opt->diffopt,
-                                  status ? DIFF_WHITESPACE : DIFF_FRAGINFO);
-       reset = diff_get_color_opt(&opt->diffopt, DIFF_RESET);
-
-       bol = gpg_output.buf;
-       while (*bol) {
-               eol = strchrnul(bol, '\n');
-               printf("%s%.*s%s%s", color, (int)(eol - bol), bol, reset,
-                      *eol ? "\n" : "");
-               bol = (*eol) ? (eol + 1) : eol;
-       }
+       show_sig_lines(opt, status, gpg_output.buf);
 
  out:
        strbuf_release(&gpg_output);