Merge branch 'lh/plugins'

Conflicts:
	cgit.c
	cgit.h

7 files changed, 125 insertions, 32 deletions

diff --git a/cgit.c b/cgit.c
index aa1107a..dbec196 100644
--- a/cgit.c
+++ b/cgit.c
@@ -27,2 +27,17 @@ void add_mimetype(const char *name, const char *value)
 
+struct cgit_filter *new_filter(const char *cmd, int extra_args)
+{
+	struct cgit_filter *f;
+
+	if (!cmd || !cmd[0])
+		return NULL;
+
+	f = xmalloc(sizeof(struct cgit_filter));
+	f->cmd = xstrdup(cmd);
+	f->argv = xmalloc((2 + extra_args) * sizeof(char *));
+	f->argv[0] = f->cmd;
+	f->argv[1] = NULL;
+	return f;
+}
+
 void config_cb(const char *name, const char *value)
@@ -87,2 +102,4 @@ void config_cb(const char *name, const char *value)
 		ctx.cfg.cache_dynamic_ttl = atoi(value);
+	else if (!strcmp(name, "commit-filter"))
+		ctx.cfg.commit_filter = new_filter(value, 0);
 	else if (!strcmp(name, "embedded"))
@@ -97,2 +114,4 @@ 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"))
@@ -141,2 +160,6 @@ void config_cb(const char *name, const char *value)
 		ctx.repo->module_link= xstrdup(value);
+	else if (ctx.repo && !strcmp(name, "repo.commit-filter"))
+		ctx.repo->commit_filter = new_filter(value, 0);
+	else if (ctx.repo && !strcmp(name, "repo.source-filter"))
+		ctx.repo->source_filter = new_filter(value, 1);
 	else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
diff --git a/cgit.h b/cgit.h
index 1194eb0..b8557ac 100644
--- a/cgit.h
+++ b/cgit.h
@@ -51,2 +51,11 @@ typedef void (*linediff_fn)(char *line, int len);
 
+struct cgit_filter {
+	char *cmd;
+	char **argv;
+	int old_stdout;
+	int pipe_fh[2];
+	int pid;
+	int exitstatus;
+};
+
 struct cgit_repo {
@@ -67,2 +76,4 @@ struct cgit_repo {
 	time_t mtime;
+	struct cgit_filter *commit_filter;
+	struct cgit_filter *source_filter;
 };
@@ -179,2 +190,4 @@ struct cgit_config {
 	struct string_list mimetypes;
+	struct cgit_filter *commit_filter;
+	struct cgit_filter *source_filter;
 };
@@ -253,2 +266,5 @@ extern int cgit_parse_snapshots_mask(const char *str);
 
+extern int cgit_open_filter(struct cgit_filter *filter);
+extern int cgit_close_filter(struct cgit_filter *filter);
+
 
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 0412f64..dc63637 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -57,2 +57,8 @@ clone-prefix::
 
+commit-filter::
+	Specifies a command which will be invoked to format commit messages.
+	The command will get the message on its STDIN, and the STDOUT from the
+	command will be included verbatim as the commit message, i.e. this can
+	be used to implement bugtracker integration. Default value: none.
+
 css::
@@ -208,2 +214,10 @@ 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::
@@ -234,2 +248,5 @@ repo.clone-url::
 
+repo.commit-filter::
+	Override the default commit-filter. Default value: <commit-filter>.
+
 repo.defbranch::
@@ -274,2 +291,5 @@ repo.snapshots::
 
+repo.source-filter::
+	Override the default source-filter. Default value: <source-filter>.
+
 repo.url::
diff --git a/shared.c b/shared.c
index cce0af4..783604b 100644
--- a/shared.c
+++ b/shared.c
@@ -64,2 +64,4 @@ struct cgit_repo *cgit_add_repo(const char *url)
 	ret->mtime = -1;
+	ret->commit_filter = ctx.cfg.commit_filter;
+	ret->source_filter = ctx.cfg.source_filter;
 	return ret;
@@ -357 +359,36 @@ int cgit_parse_snapshots_mask(const char *str)
 }
+
+int cgit_open_filter(struct cgit_filter *filter)
+{
+
+	filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
+		"Unable to duplicate STDOUT");
+	chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
+	filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
+	if (filter->pid == 0) {
+		close(filter->pipe_fh[1]);
+		chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
+			"Unable to use pipe as STDIN");
+		execvp(filter->cmd, filter->argv);
+		die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
+			strerror(errno), errno);
+	}
+	close(filter->pipe_fh[0]);
+	chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
+		"Unable to use pipe as STDOUT");
+	close(filter->pipe_fh[1]);
+	return 0;
+}
+
+int cgit_close_filter(struct cgit_filter *filter)
+{
+	chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
+		"Unable to restore STDOUT");
+	close(filter->old_stdout);
+	if (filter->pid < 0)
+		return 0;
+	waitpid(filter->pid, &filter->exitstatus, 0);
+	if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
+		return 0;
+	die("Subprocess %s exited abnormally", filter->cmd);
+}
diff --git a/ui-commit.c b/ui-commit.c
index 9fdb8ee..d6b73ee 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -95,3 +95,7 @@ void cgit_print_commit(char *hex)
 	html("<div class='commit-subject'>");
+	if (ctx.repo->commit_filter)
+		cgit_open_filter(ctx.repo->commit_filter);
 	html_txt(info->subject);
+	if (ctx.repo->commit_filter)
+		cgit_close_filter(ctx.repo->commit_filter);
 	show_commit_decorations(commit);
@@ -99,3 +103,7 @@ void cgit_print_commit(char *hex)
 	html("<div class='commit-msg'>");
+	if (ctx.repo->commit_filter)
+		cgit_open_filter(ctx.repo->commit_filter);
 	html_txt(info->msg);
+	if (ctx.repo->commit_filter)
+		cgit_close_filter(ctx.repo->commit_filter);
 	html("</div>");
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 5372f5d..4136b3e 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -14,33 +14,12 @@ static int write_compressed_tar_archive(struct archiver_args *args,const char *f
 {
-	int rw[2];
-	pid_t gzpid;
-	int stdout2;
-	int status;
 	int rv;
+	struct cgit_filter f;
 
-	stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing");
-	chk_zero(pipe(rw), "Opening pipe from compressor subprocess");
-	gzpid = chk_non_negative(fork(), "Forking compressor subprocess");
-	if(gzpid==0) {
-		/* child */
-		chk_zero(close(rw[1]), "Closing write end of pipe in child");
-		chk_zero(close(STDIN_FILENO), "Closing STDIN");
-		chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin");
-		execlp(filter,filter,NULL);
-		_exit(-1);
-	}
-	/* parent */
-	chk_zero(close(rw[0]), "Closing read end of pipe");
-	chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor");
-
+	f.cmd = xstrdup(filter);
+	f.argv = malloc(2 * sizeof(char *));
+	f.argv[0] = f.cmd;
+	f.argv[1] = NULL;
+	cgit_open_filter(&f);
 	rv = write_tar_archive(args);
-
-	chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor");
-	chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT");
-	chk_zero(close(stdout2), "Closing uncompressed STDOUT");
-	chk_zero(close(rw[1]), "Closing write end of pipe in parent");
-	chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process");
-	if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) )
-		cgit_print_error("Failed to compress archive");
-
+	cgit_close_filter(&f);
 	return rv;
diff --git a/ui-tree.c b/ui-tree.c
index 61fcf5a..c608754 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.repo->source_filter) {
+		html("<tr><td class='lines'><pre><code>");
+		ctx.repo->source_filter->argv[1] = xstrdup(name);
+		cgit_open_filter(ctx.repo->source_filter);
+		write(STDOUT_FILENO, buf, size);
+		cgit_close_filter(ctx.repo->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);
 }
@@ -221,3 +231,3 @@ 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;