4 files changed, 25 insertions, 4 deletions

diff --git a/cgit.c b/cgit.c
index 779a464..eb7b45d 100644
--- a/cgit.c
+++ b/cgit.c
@@ -102,2 +102,4 @@ void config_cb(const char *name, const char *value)
 		ctx.cfg.max_commit_count = atoi(value);
+	else if (!strcmp(name, "source-filter"))
+		ctx.cfg.source_filter = new_filter(value, 1);
 	else if (!strcmp(name, "summary-log"))
diff --git a/cgit.h b/cgit.h
index d0fff1f..f9cf0df 100644
--- a/cgit.h
+++ b/cgit.h
@@ -185,2 +185,3 @@ struct cgit_config {
 	int summary_tags;
+	struct cgit_filter *source_filter;
 };
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index a207fe0..d420ad4 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -200,2 +200,10 @@ snapshots::
 
+source-filter::
+	Specifies a command which will be invoked to format plaintext blobs
+	in the tree view. The command will get the blob content on its STDIN
+	and the name of the blob as its only command line argument. The STDOUT
+	from the command will be included verbatim as the blob contents, i.e.
+	this can be used to implement e.g. syntax highlighting. Default value:
+	none.
+
 summary-branches::
diff --git a/ui-tree.c b/ui-tree.c
index 553dbaa..816e121 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -17,3 +17,3 @@ int header = 0;
 
-static void print_text_buffer(char *buf, unsigned long size)
+static void print_text_buffer(const char *name, char *buf, unsigned long size)
 {
@@ -24,2 +24,12 @@ static void print_text_buffer(char *buf, unsigned long size)
 	html("<table summary='blob content' class='blob'>\n");
+	if (ctx.cfg.source_filter) {
+		html("<tr><td class='lines'><pre><code>");
+		ctx.cfg.source_filter->argv[1] = xstrdup(name);
+		cgit_open_filter(ctx.cfg.source_filter);
+		write(STDOUT_FILENO, buf, size);
+		cgit_close_filter(ctx.cfg.source_filter);
+		html("</code></pre></td></tr></table>\n");
+		return;
+	}
+
 	html("<tr><td class='linenumbers'><pre>");
@@ -67,3 +77,3 @@ static void print_binary_buffer(char *buf, unsigned long size)
 
-static void print_object(const unsigned char *sha1, char *path)
+static void print_object(const unsigned char *sha1, char *path, const char *basename)
 {
@@ -95,3 +105,3 @@ static void print_object(const unsigned char *sha1, char *path)
 	else
-		print_text_buffer(buf, size);
+		print_text_buffer(basename, buf, size);
 }
@@ -215,3 +225,3 @@ static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
 		} else {
-			print_object(sha1, buffer);
+			print_object(sha1, buffer, pathname);
 			return 0;