[PATCH v4] ui-shared: allow to split the repository link

[Petr Vorel]

Teach cgit split the repository link in the top of repository "summary"
view. This emulates the same behaviour as it's in gitweb.

This behaviour is not implemented for repositories which have
"repo.name" set different than "repo.url".

This feature is controlled by a new config variable:
"summary-enable-split-repo-link" (disabled by default).

Signed-off-by: Petr Vorel <petr.vorel at gmail.com>
---
v4: Implement suggestions from John Keeping (thanks for them :-)):
* use strchr() instead of strtok_r() and variadic arrays
* use cgit_repourl() and html_*() instead of cgit_summary_link().
* add comment why we compare page.url and page.name
v3: New config variable "summary-enable-split-repo-link", minor cleanup.
v2: Minor cleanup.
---
 cgit.c         |  3 +++
 cgit.h         |  1 +
 cgitrc.5.txt   |  6 ++++++
 tests/setup.sh |  1 +
 ui-shared.c    | 29 ++++++++++++++++++++++++++++-
 5 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/cgit.c b/cgit.c
index fc482be..d9050f4 100644
--- a/cgit.c
+++ b/cgit.c
@@ -250,6 +250,8 @@ static void config_cb(const char *name, const char *value)
 		ctx.cfg.summary_log = atoi(value);
 	else if (!strcmp(name, "summary-branches"))
 		ctx.cfg.summary_branches = atoi(value);
+	else if (!strcmp(name, "summary-enable-split-repo-link"))
+		ctx.cfg.summary_enable_split_repo_link = atoi(value);
 	else if (!strcmp(name, "summary-tags"))
 		ctx.cfg.summary_tags = atoi(value);
 	else if (!strcmp(name, "side-by-side-diffs"))
@@ -389,6 +391,7 @@ static void prepare_context(void)
 	ctx.cfg.repository_sort = "name";
 	ctx.cfg.section_sort = 1;
 	ctx.cfg.summary_branches = 10;
+	ctx.cfg.summary_enable_split_repo_link = 0;
 	ctx.cfg.summary_log = 10;
 	ctx.cfg.summary_tags = 10;
 	ctx.cfg.max_atom_items = 10;
diff --git a/cgit.h b/cgit.h
index 325432b..fec5b7e 100644
--- a/cgit.h
+++ b/cgit.h
@@ -255,6 +255,7 @@ struct cgit_config {
 	int snapshots;
 	int section_sort;
 	int summary_branches;
+	int summary_enable_split_repo_link;
 	int summary_log;
 	int summary_tags;
 	diff_type difftype;
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 2e1912d..be58857 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -438,6 +438,12 @@ summary-branches::
 	Specifies the number of branches to display in the repository "summary"
 	view. Default value: "10".
 
+summary-enable-split-repo-link::
+	Flag which, when set to "1", will make cgit split the repository link in
+	the top of repository "summary" view. This emulates the same behaviour as
+	it's in gitweb. This behaviour is not implemented for repositories which
+	have "repo.name" set different than "repo.url". Default value: "0".
+
 summary-log::
 	Specifies the number of log entries to display in the repository
 	"summary" view. Default value: "10".
diff --git a/tests/setup.sh b/tests/setup.sh
index 7590f04..14e4f93 100755
--- a/tests/setup.sh
+++ b/tests/setup.sh
@@ -109,6 +109,7 @@ enable-log-filecount=1
 enable-log-linecount=1
 summary-log=5
 summary-branches=5
+summary-enable-split-repo-link=0
 summary-tags=5
 clone-url=git://example.org/\$CGIT_REPO_URL.git
 enable-filter-overrides=1
diff --git a/ui-shared.c b/ui-shared.c
index 9a38aa9..2b85a94 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -937,7 +937,34 @@ static void print_header(void)
 	if (ctx.repo) {
 		cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 		html(" : ");
-		cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
+
+		/*
+		 * NOTE: If repo.name and repo.url are different, we ignore
+		 * summary_enable_split_repo_link flag and don't split link as it
+		 * wouldn't make sense to split the path.
+		 * */
+		if (ctx.cfg.summary_enable_split_repo_link &&
+			!(strcmp(ctx.repo->name, ctx.repo->url))) {
+			char *name = ctx.repo->name;
+			char *start = name;
+			for (;;) {
+				char *delim = strchr(start, '/');
+				if (delim)
+					*delim = '\0';
+
+				html_link_open(cgit_repourl(name), NULL, NULL);
+				html_ntxt(strlen(start), start);
+				html_link_close();
+
+				if (!delim)
+					break;
+				*delim = '/';
+				html("/");
+				start = delim + 1;
+			}
+		} else
+			cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
+
 		if (ctx.env.authenticated) {
 			html("</td><td class='form'>");
 			html("<form method='get' action=''>\n");
-- 
2.8.1