[PATCH 2/3] Allow help.htmlpath to be an http: URL

[Chris Webb <chris@arachsys.com>]

Setting this to a URL prefix instead of a path to a local directory allows
git-help --web to work even when HTML docs aren't locally installed, by
pointing the browser at a copy accessible on the web. For example,

    [help]
      format = html
      htmlpath = http://git-scm.com/docs

will use the publicly available documentation on the git homepage.

Signed-off-by: Chris Webb <chris@arachsys.com>
---
 builtin/help.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/builtin/help.c b/builtin/help.c
index b467db2..60b3251 100644
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -399,9 +399,11 @@ static void get_html_page_path(struct strbuf *page_path, const char *page)
 		html_path = system_path(GIT_HTML_PATH);
 
 	/* Check that we have a git documentation directory. */
-	if (stat(mkpath("%s/git.html", html_path), &st)
-	    || !S_ISREG(st.st_mode))
-		die(_("'%s': not a documentation directory."), html_path);
+	if (prefixcmp(html_path, "http:")) {
+		if (stat(mkpath("%s/git.html", html_path), &st)
+				|| !S_ISREG(st.st_mode))
+			die("'%s': not a documentation directory.", html_path);
+	}
 
 	strbuf_init(page_path, 0);
 	strbuf_addf(page_path, "%s/%s.html", html_path, page);
-- 
1.7.10