[PATCH] Support .git/category files

[Jan-Marek Glogowski]

Gitweb reads .git/category to set a repository section for
grouping. This handles the file in the same way a .git/description
file is handled.

The file section takes precedence over the ctx.cfg.section_from_path
setting.
---
 cgit.c      |  2 +-
 cgit.h      |  1 +
 scan-tree.c | 20 +++++++++++++++++++-
 shared.c    |  1 +
 4 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/cgit.c b/cgit.c
index 0ad8171..239f709 100644
--- a/cgit.c
+++ b/cgit.c
@@ -377,7 +377,7 @@ static void prepare_context(void)
 	ctx.cfg.root_desc = "a fast webinterface for the git dscm";
 	ctx.cfg.scan_hidden_path = 0;
 	ctx.cfg.script_name = CGIT_SCRIPT_NAME;
-	ctx.cfg.section = "";
+	ctx.cfg.section = cgit_default_repo_section;
 	ctx.cfg.repository_sort = "name";
 	ctx.cfg.section_sort = 1;
 	ctx.cfg.summary_branches = 10;
diff --git a/cgit.h b/cgit.h
index 16f8092..ea9aef9 100644
--- a/cgit.h
+++ b/cgit.h
@@ -318,6 +318,7 @@ extern struct cgit_context ctx;
 extern const struct cgit_snapshot_format cgit_snapshot_formats[];
 
 extern char *cgit_default_repo_desc;
+extern char *cgit_default_repo_section;
 extern struct cgit_repo *cgit_add_repo(const char *url);
 extern struct cgit_repo *cgit_get_repoinfo(const char *url);
 extern void cgit_repo_config_cb(const char *name, const char *value);
diff --git a/scan-tree.c b/scan-tree.c
index e900ad9..c7ba509 100644
--- a/scan-tree.c
+++ b/scan-tree.c
@@ -149,7 +149,25 @@ static void add_repo(const char *base, struct strbuf *path, repo_config_fn fn)
 		strbuf_setlen(path, pathlen);
 	}
 
-	if (ctx.cfg.section_from_path) {
+	if (repo->section == cgit_default_repo_section || !repo->section) {
+		strbuf_addstr(path, "category");
+		if (!stat(path->buf, &st) &&
+		    !readfile(path->buf, &repo->section, &size)) {
+			// trim category, as gitweb does
+			while (size > 0 && isspace((unsigned char)repo->section[size - 1]))
+				size--;
+			if (size == 0) {
+				free(repo->section);
+				repo->section = cgit_default_repo_section;
+			}
+			else
+				repo->section[size] = '\0';
+		}
+		strbuf_setlen(path, pathlen);
+	}
+
+	if (ctx.cfg.section_from_path
+            && (repo->section == cgit_default_repo_section || !repo->section)) {
 		n = ctx.cfg.section_from_path;
 		if (n > 0) {
 			slash = rel.buf - 1;
diff --git a/shared.c b/shared.c
index ae17d78..4b21da2 100644
--- a/shared.c
+++ b/shared.c
@@ -34,6 +34,7 @@ int chk_non_negative(int result, char *msg)
 }
 
 char *cgit_default_repo_desc = "[no description]";
+char *cgit_default_repo_section = "";
 struct cgit_repo *cgit_add_repo(const char *url)
 {
 	struct cgit_repo *ret;
-- 
1.9.1