[PATCH v3 16/17] ui-shared: add helper for generating non-urlencoded links

[Andy Green]

We are going to have to produce plain links in the next patch.
But depending on config, the links are not simple.

Reproduce the logic in repolink() to generate correctly-
formatted links in a strbuf, without urlencoding, in a reusable
helper cgit_repo_create_url().

Signed-off-by: Andy Green <andy at warmcat.com>
---
 ui-shared.c |   30 ++++++++++++++++++++++++++++++
 ui-shared.h |    3 +++
 2 files changed, 33 insertions(+)

diff --git a/ui-shared.c b/ui-shared.c
index 21bbded..79c39a8 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -221,6 +221,36 @@ void cgit_index_link(const char *name, const char *title, const char *class,
 	site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 }
 
+char *cgit_repo_create_url(struct strbuf *sb_pre, struct strbuf *sb_post,
+			    const char *page, const char *head, const char *path)
+{
+	const char *delim = "?";
+	struct strbuf *sb = sb_pre;
+
+	if (ctx.cfg.virtual_root)
+		strbuf_addf(sb_pre, "%s%s", ctx.cfg.virtual_root, ctx.repo->url);
+	else {
+		strbuf_addstr(sb_pre, ctx.cfg.script_name);
+		strbuf_addf(sb_post, "?url=%s", ctx.repo->url);
+		sb = sb_post;
+		delim = "&";
+	}
+
+	if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
+		strbuf_addch(sb, '/');
+	if (page) {
+		strbuf_addf(sb, "%s/", page);
+		if (path)
+			strbuf_addstr(sb, path);
+	}
+
+	if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
+		strbuf_addf(sb_post, "%sh=%s", delim, head);
+		delim = "&";
+	}
+	return fmt("%s", delim);
+}
+
 static char *repolink(const char *title, const char *class, const char *page,
 		      const char *head, const char *path)
 {
diff --git a/ui-shared.h b/ui-shared.h
index c105b3b..679d2f2 100644
--- a/ui-shared.h
+++ b/ui-shared.h
@@ -59,6 +59,9 @@ extern void cgit_object_link(struct object *obj);
 
 extern void cgit_submodule_link(const char *class, char *path,
 				const char *rev);
+extern char *cgit_repo_create_url(struct strbuf *sb_pre, struct strbuf *sb_post,
+				  const char *page, const char *head,
+				  const char *path);
 
 extern void cgit_print_layout_start(void);
 extern void cgit_print_layout_end(void);