commit: allow suppression of implicit identity advice

diff --git a/builtin-commit.c b/builtin-commit.c
index e93a647c59f1f52a4b0eb92b6c84fd9cec0aad6a..a73a532f2ff4e11d070ddb2bdf490f850a6a425f 100644 (file)
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -35,7 +35,20 @@ static const char * const builtin_status_usage[] = {
        NULL
 };
 
+static const char implicit_ident_advice[] =
+"Your name and email address were configured automatically based\n"
+"on your username and hostname. Please check that they are accurate.\n"
+"You can suppress this message by setting them explicitly:\n"
+"\n"
+"    git config --global user.name Your Name\n"
+"    git config --global user.email you@example.com\n"
+"\n"
+"If the identity used for this commit is wrong, you can fix it with:\n"
+"\n"
+"    git commit --amend --author='Your Name <you@example.com>'\n";
+
 static unsigned char head_sha1[20], merge_head_sha1[20];
+
 static char *use_message_buffer;
 static const char commit_editmsg[] = "COMMIT_EDITMSG";
 static struct lock_file index_lock; /* real index */
@@ -890,7 +903,7 @@ static int parse_status_slot(const char *var, int offset)
                return WT_STATUS_NOBRANCH;
        if (!strcasecmp(var+offset, "unmerged"))
                return WT_STATUS_UNMERGED;
-       die("bad config variable '%s'", var);
+       return -1;
 }
 
 static int git_status_config(const char *k, const char *v, void *cb)
@@ -910,6 +923,8 @@ static int git_status_config(const char *k, const char *v, void *cb)
        }
        if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
                int slot = parse_status_slot(k, 13);
+               if (slot < 0)
+                       return 0;
                if (!v)
                        return config_error_nonbool(k);
                color_parse(v, k, s->color_palette[slot]);
@@ -955,9 +970,12 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
 {
        struct rev_info rev;
        struct commit *commit;
-       static const char *format = "format:%h] %s";
+       struct strbuf format = STRBUF_INIT;
        unsigned char junk_sha1[20];
        const char *head = resolve_ref("HEAD", junk_sha1, 0, NULL);
+       struct pretty_print_context pctx = {0};
+       struct strbuf author_ident = STRBUF_INIT;
+       struct strbuf committer_ident = STRBUF_INIT;
 
        commit = lookup_commit(sha1);
        if (!commit)
@@ -965,6 +983,25 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
        if (!commit || parse_commit(commit))
                die("could not parse newly created commit");
 
+       strbuf_addstr(&format, "format:%h] %s");
+
+       format_commit_message(commit, "%an <%ae>", &author_ident, &pctx);
+       format_commit_message(commit, "%cn <%ce>", &committer_ident, &pctx);
+       if (strbuf_cmp(&author_ident, &committer_ident)) {
+               strbuf_addstr(&format, "\n Author: ");
+               strbuf_addbuf_percentquote(&format, &author_ident);
+       }
+       if (!user_ident_explicitly_given) {
+               strbuf_addstr(&format, "\n Committer: ");
+               strbuf_addbuf_percentquote(&format, &committer_ident);
+               if (advice_implicit_identity) {
+                       strbuf_addch(&format, '\n');
+                       strbuf_addstr(&format, implicit_ident_advice);
+               }
+       }
+       strbuf_release(&author_ident);
+       strbuf_release(&committer_ident);
+
        init_revisions(&rev, prefix);
        setup_revisions(0, NULL, &rev, NULL);
 
@@ -975,7 +1012,8 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
 
        rev.verbose_header = 1;
        rev.show_root_diff = 1;
-       get_commit_format(format, &rev);
+       get_commit_format(format.buf, &rev);
+       strbuf_release(&format);
        rev.always_show_header = 0;
        rev.diffopt.detect_rename = 1;
        rev.diffopt.rename_limit = 100;
@@ -994,7 +1032,7 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
                struct pretty_print_context ctx = {0};
                struct strbuf buf = STRBUF_INIT;
                ctx.date_mode = DATE_NORMAL;
-               format_commit_message(commit, format + 7, &buf, &ctx);
+               format_commit_message(commit, format.buf + 7, &buf, &ctx);
                printf("%s\n", buf.buf);
                strbuf_release(&buf);
        }