finally, at least :)

Had to move `struct blame_line' to the header for it to be visible and
typedef the callback because was painful to type.

no functional change intended.

ok?

diff /home/op/w/got
commit - 69525b4e7234cc5d81905e84a67d9b1768606e34
path + /home/op/w/got
blob - 6ee4848f094c2566d8233b5aefa8fbbaabc158e9
file + gotwebd/got_operations.c
--- gotwebd/got_operations.c
+++ gotwebd/got_operations.c
@@ -1027,13 +1027,6 @@ struct blame_line {
 	return 0;
 }
 
-struct blame_line {
-	int annotated;
-	char *id_str;
-	char *committer;
-	char datebuf[11]; /* YYYY-MM-DD + NUL */
-};
-
 struct blame_cb_args {
 	struct blame_line *lines;
 	int nlines;
@@ -1043,6 +1036,7 @@ struct blame_cb_args {
 	FILE *f;
 	struct got_repository *repo;
 	struct request *c;
+	render_blame_line_fn cb;
 };
 
 static const struct got_error *
@@ -1053,14 +1047,11 @@ got_gotweb_blame_cb(void *arg, int nlines, int lineno,
 	struct blame_cb_args *a = arg;
 	struct blame_line *bline;
 	struct request *c = a->c;
-	struct transport *t = c->t;
-	struct repo_dir *repo_dir = t->repo_dir;
-	char *line = NULL, *eline = NULL;
+	char *line = NULL;
 	size_t linesize = 0;
 	off_t offset;
 	struct tm tm;
 	time_t committer_time;
-	int r;
 
 	if (nlines != a->nlines ||
 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
@@ -1105,76 +1096,26 @@ got_gotweb_blame_cb(void *arg, int nlines, int lineno,
 	}
 
 	while (a->lineno_cur <= a->nlines && bline->annotated) {
-		char *smallerthan, *at, *nl, *committer;
-		size_t len;
-
 		if (getline(&line, &linesize, a->f) == -1) {
 			if (ferror(a->f))
 				err = got_error_from_errno("getline");
 			break;
 		}
 
-		committer = bline->committer;
-		smallerthan = strchr(committer, '<');
-		if (smallerthan && smallerthan[1] != '\0')
-			committer = smallerthan + 1;
-		at = strchr(committer, '@');
-		if (at)
-			*at = '\0';
-		len = strlen(committer);
-		if (len >= 9)
-			committer[8] = '\0';
+		if (a->cb(c->tp, line, bline, a->nlines_prec,
+		    a->lineno_cur) == -1)
+			break;
 
-		nl = strchr(line, '\n');
-		if (nl)
-			*nl = '\0';
-
-		err = gotweb_escape_html(&eline, line);
-		if (err)
-			goto done;
-
-		if (fcgi_printf(c, "<div class='blame_wrapper'>"
-		    "<div class='blame_number'>%.*d</div>"
-		    "<div class='blame_hash'>",
-		    a->nlines_prec, a->lineno_cur) == -1)
-			goto done;
-
-		r = gotweb_link(c, &(struct gotweb_url){
-			.action = DIFF,
-			.index_page = -1,
-			.page = -1,
-			.path = repo_dir->name,
-			.commit = bline->id_str,
-		    }, "%.8s", bline->id_str);
-		if (r == -1)
-			goto done;
-
-		r = fcgi_printf(c,
-		    "</div>"
-		    "<div class='blame_date'>%s</div>"
-		    "<div class='blame_author'>%s</div>"
-		    "<div class='blame_code'>%s</div>"
-		    "</div>",	/* .blame_wrapper */
-		    bline->datebuf,
-		    committer,
-		    eline);
-		if (r == -1)
-			goto done;
-
 		a->lineno_cur++;
 		bline = &a->lines[a->lineno_cur - 1];
-
-		free(eline);
-		eline = NULL;
 	}
 done:
 	free(line);
-	free(eline);
 	return err;
 }
 
 const struct got_error *
-got_output_file_blame(struct request *c)
+got_output_file_blame(struct request *c, render_blame_line_fn cb)
 {
 	const struct got_error *error = NULL;
 	struct transport *t = c->t;
@@ -1194,6 +1135,7 @@ got_output_file_blame(struct request *c)
 	TAILQ_INIT(&refs);
 	bca.f = NULL;
 	bca.lines = NULL;
+	bca.cb = cb;
 
 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
 	    qs->folder ? "/" : "", qs->file) == -1) {
blob - dadd1ae79464caf377f53bb82de16886cdeb9df9
file + gotwebd/gotweb.c
--- gotwebd/gotweb.c
+++ gotwebd/gotweb.c
@@ -93,7 +93,6 @@ static const struct got_error *gotweb_render_blame(str
     struct server *, const char *, int);
 static const struct got_error *gotweb_get_clone_url(char **, struct server *,
     const char *, int);
-static const struct got_error *gotweb_render_blame(struct request *);
 
 static void gotweb_free_querystring(struct querystring *);
 static void gotweb_free_repo_dir(struct repo_dir *);
@@ -245,11 +244,13 @@ render:
 
 	switch(qs->action) {
 	case BLAME:
-		error = gotweb_render_blame(c);
+		error = got_get_repo_commits(c, 1);
 		if (error) {
 			log_warnx("%s: %s", __func__, error->msg);
 			goto err;
 		}
+		if (gotweb_render_blame(c->tp) == -1)
+			goto done;
 		break;
 	case BLOB:
 		if (gotweb_render_blob(c->tp, blob) == -1)
@@ -974,59 +975,6 @@ static const struct got_error *
 	return error;
 }
 
-static const struct got_error *
-gotweb_render_blame(struct request *c)
-{
-	const struct got_error *error = NULL;
-	struct transport *t = c->t;
-	struct repo_commit *rc = NULL;
-	char *age = NULL, *msg = NULL;
-	int r;
-
-	error = got_get_repo_commits(c, 1);
-	if (error)
-		return error;
-
-	rc = TAILQ_FIRST(&t->repo_commits);
-
-	error = gotweb_get_time_str(&age, rc->committer_time, TM_LONG);
-	if (error)
-		goto done;
-	error = gotweb_escape_html(&msg, rc->commit_msg);
-	if (error)
-		goto done;
-
-	r = fcgi_printf(c, "<div id='blame_title_wrapper'>\n"
-	    "<div id='blame_title'>Blame</div>\n"
-	    "</div>\n"		/* #blame_title_wrapper */
-	    "<div id='blame_content'>\n"
-	    "<div id='blame_header_wrapper'>\n"
-	    "<div id='blame_header'>\n"
-	    "<div class='header_age_title'>Date:</div>\n"
-	    "<div class='header_age'>%s</div>\n"
-	    "<div id='header_commit_msg_title'>Message:</div>\n"
-	    "<div id='header_commit_msg'>%s</div>\n"
-	    "</div>\n"		/* #blame_header */
-	    "</div>\n"		/* #blame_header_wrapper */
-	    "<div class='dotted_line'></div>\n"
-	    "<div id='blame'>\n",
-	    age,
-	    msg);
-	if (r == -1)
-		goto done;
-
-	error = got_output_file_blame(c);
-	if (error)
-		goto done;
-
-	fcgi_printf(c, "</div>\n"	/* #blame */
-	    "</div>\n");		/* #blame_content */
-done:
-	free(age);
-	free(msg);
-	return error;
-}
-
 const struct got_error *
 gotweb_escape_html(char **escaped_html, const char *orig_html)
 {
blob - 2b26cfe7719c3bdd3462b9c0934f59fbcaac5aed
file + gotwebd/gotwebd.h
--- gotwebd/gotwebd.h
+++ gotwebd/gotwebd.h
@@ -143,6 +143,13 @@ struct repo_dir {
 	uint8_t		reserved;
 }__attribute__((__packed__));
 
+struct blame_line {
+	int		 annotated;
+	char		*id_str;
+	char		*committer;
+	char		 datebuf[11]; /* YYYY-MM-DD + NUL */
+};
+
 struct repo_dir {
 	char			*name;
 	char			*owner;
@@ -431,6 +438,9 @@ extern struct gotwebd	*gotwebd_env;
 
 extern struct gotwebd	*gotwebd_env;
 
+typedef int (*render_blame_line_fn)(struct template *, const char *,
+    struct blame_line *, int, int);
+
 /* sockets.c */
 void sockets(struct privsep *, struct privsep_proc *);
 void sockets_shutdown(void);
@@ -475,6 +485,7 @@ int	gotweb_render_rss(struct template *);
 int	gotweb_render_diff(struct template *, FILE *);
 int	gotweb_render_branches(struct template *, struct got_reflist_head *);
 int	gotweb_render_summary(struct template *, struct got_reflist_head *);
+int	gotweb_render_blame(struct template *);
 int	gotweb_render_rss(struct template *);
 
 /* parse.y */
@@ -512,7 +523,8 @@ const struct got_error *got_output_file_blame(struct r
 const struct got_error *got_output_file_blob(struct request *);
 int got_output_blob_by_lines(struct template *, struct got_blob_object *,
     int (*)(struct template *, const char *, size_t));
-const struct got_error *got_output_file_blame(struct request *);
+const struct got_error *got_output_file_blame(struct request *,
+    render_blame_line_fn);
 
 /* config.c */
 int config_setserver(struct gotwebd *, struct server *);
blob - 4ed5a74cc4f6b80c911b880ef2f0a628eed248c0
file + gotwebd/pages.tmpl
--- gotwebd/pages.tmpl
+++ gotwebd/pages.tmpl
@@ -40,6 +40,8 @@ static int gotweb_render_tree_item(struct template *, 
 
 static int gotweb_render_blob_line(struct template *, const char *, size_t);
 static int gotweb_render_tree_item(struct template *, struct got_tree_entry *);
+static int blame_line(struct template *, const char *, struct blame_line *,
+    int, int);
 
 static inline int diff_line(struct template *, char *);
 static inline int tag_item(struct template *, struct repo_tag *);
@@ -870,6 +872,77 @@ gotweb_render_age(struct template *tp, time_t time, in
 {{ render gotweb_render_branches(tp, refs) }}
 {{ end }}
 
+{{ define gotweb_render_blame(struct template *tp) }}
+{!
+	const struct got_error	*err;
+	struct request		*c = tp->tp_arg;
+	struct transport	*t = c->t;
+	struct repo_commit	*rc = TAILQ_FIRST(&t->repo_commits);
+!}
+<div id="blame_title_wrapper">
+  <div id="blame_title">Blame</div>
+</div>
+<div id="blame_content">
+  <div id="blame_header_wrapper">
+    <div id="blame_header">
+      <div class="header_age_title">Date:</div>
+      <div class="header_age">
+        {{ render gotweb_render_age(tp, rc->committer_time, TM_LONG) }}
+      </div>
+      <div id="header_commit_msg_title">Message:</div>
+      <div id="header_commit_msg">{{ rc->commit_msg }}</div>
+    </div>
+  </div>
+  <div class="dotted_line"></div>
+  <div id="blame">
+    {{ "\n" }}
+    {!
+	err = got_output_file_blame(c, &blame_line);
+	if (err) {
+		log_warnx("%s: got_output_file_blame: %s", __func__,
+		    err->msg);
+		return (-1);
+	}
+    !}
+  </div>
+</div>
+{{ end }}
+
+{{ define blame_line(struct template *tp, const char *line,
+    struct blame_line *bline, int lprec, int lcur) }}
+{!
+	struct request		*c = tp->tp_arg;
+	struct transport	*t = c->t;
+	struct repo_dir		*repo_dir = t->repo_dir;
+	char			*committer, *s;
+	struct gotweb_url	 url = {
+		.action = DIFF,
+		.index_page = -1,
+		.page = -1,
+		.path = repo_dir->name,
+		.commit = bline->id_str,
+	};
+
+	s = strchr(bline->committer, '<');
+	committer = s ? s + 1 : bline->committer;
+
+	s = strchr(committer, '@');
+	if (s)
+		*s = '\0';
+!}
+<div class="blame_wrapper">
+  <div class="blame_number">{{ printf "%.*d", lprec, lcur }}</div>
+  <div class="blame_hash">
+    <a href="{{ render gotweb_render_url(c, &url) }}">
+      {{ printf "%.8s", bline->id_str }}
+    </a>
+  </div>
+  <div class="blame_date">{{ bline->datebuf }}</div>
+  <div class="blame_author">{{ printf "%.9s", committer }}</div>
+  <div class="blame_code">{{ line }}</div>
+</div>
+{{ end }}
+
 {{ define gotweb_render_rss(struct template *tp) }}
 {!
 	struct request		*c = tp->tp_arg;