1 file changed, 29 insertions, 24 deletions
diff --git a/custom/extensions/link-commits.lua b/custom/extensions/link-commits.lua
index 3f2429d..42252f3 100644
--- a/custom/extensions/link-commits.lua
+++ b/custom/extensions/link-commits.lua
@@ -10,12 +10,10 @@
 
 
 -- Object names are handled apart from the rules below because the length
--- bound on them cannot be written as a plain Lua pattern. Recognition is by
--- shape, since a commit-filter cannot ask the repository whether a hash is
--- real, so any hex run within the bounds is linked whatever mix of digits and
--- letters it has and abbreviated and all-digit names are both caught. The
--- cost is that a long hex-looking number now and then links to an object that
--- does not exist, which cgit renders as a harmless "bad object name" page.
+-- bound on them cannot be written as a plain Lua pattern. A commit-filter
+-- cannot ask the repository whether a hash is real, so matching is by shape
+-- and a long hex number may link to an object that does not exist, which
+-- cgit renders as a harmless "Bad object id" page.
 local objects = {
 	-- Set false to stop linking bare hashes.
 	enabled = true,
@@ -32,24 +30,23 @@ local objects = {
 -- Text-reference rules, each one a Lua pattern with a single capture and a
 -- URL where %s is replaced by that capture, percent-encoded. The whole match
 -- is what gets shown and the capture is only what goes into the URL. Rules are
--- tried in order and the leftmost match on the line wins, so put the more
--- specific patterns first, and an empty list leaves only object names linked.
+-- tried in order and the leftmost match wins, so put the more specific
+-- patterns first, and an empty list leaves only object names linked.
 --
--- Lua patterns are not regular expressions. There is no alternation and no
--- {n,m} repetition, %d is a digit, %a a letter, %w a letter or digit, %x a
--- hex digit, and a literal magic character is escaped with %, so a literal
--- dash is '%-'. The whole set is in the reference manual at
+-- Lua patterns are not regular expressions. The reference is
 -- https://www.lua.org/manual/5.1/manual.html#5.4.1
 --
--- Patterns run against the escaped message, so '&', '<' and '>' reach them as
--- '&amp;', '&lt;' and '&gt;'. Match those entity spellings rather than the
--- bare character, and keep a pattern from ending part way through one, since
--- the matched run is what gets wrapped in the anchor.
+-- Patterns run against the escaped message, so match the entity spellings
+-- '&amp;', '&lt;' and '&gt;' rather than the bare characters, and keep a
+-- pattern from ending part way through one.
 local rules = {
 	{ pattern = "#(%d+)", url = "https://bugs.example.com/?bug=%s" },
-	-- { pattern = "CVE%-(%d%d%d%d%-%d+)", url = "https://www.cve.org/CVERecord?id=CVE-%s" },
-	-- { pattern = "!(%d+)",               url = "https://gitlab.example.com/group/repo/-/merge_requests/%s" },
-	-- { pattern = "RFC%s?(%d+)",          url = "https://www.rfc-editor.org/rfc/rfc%s" },
+	-- { pattern = "CVE%-(%d%d%d%d%-%d+)",
+	--   url = "https://www.cve.org/CVERecord?id=CVE-%s" },
+	-- { pattern = "!(%d+)",
+	--   url = "https://gitlab.example.com/my/repo/-/merge_requests/%s" },
+	-- { pattern = "RFC%s?(%d+)",
+	--   url = "https://www.rfc-editor.org/rfc/rfc%s" },
 }
 
 
@@ -68,7 +65,9 @@ end
 -- for a gsub reference.
 local function make_link(url_template, capture, display)
 	local encoded = url_encode(capture)
-	local href = string.gsub(url_template, "%%s", function() return encoded end)
+	local href = string.gsub(url_template, "%%s", function()
+		return encoded
+	end)
 	return "<a href='" .. href .. "'>" .. display .. "</a>"
 end
 
@@ -89,7 +88,9 @@ local function collect(text)
 					capture = string.sub(text, start, stop)
 				end
 				candidates[#candidates + 1] = {
-					start = start, stop = stop, priority = priority,
+					start = start,
+					stop = stop,
+					priority = priority,
 					link = make_link(rule.url, capture,
 						string.sub(text, start, stop)),
 				}
@@ -106,9 +107,12 @@ local function collect(text)
 			local start, stop, run =
 				string.find(text, "%f[%w](%x+)%f[%W]", init)
 			if not start then break end
-			if #run >= objects.min_length and #run <= objects.max_length then
+			if #run >= objects.min_length
+					and #run <= objects.max_length then
 				candidates[#candidates + 1] = {
-					start = start, stop = stop, priority = priority,
+					start = start,
+					stop = stop,
+					priority = priority,
 					link = make_link(objects.url, run, run),
 				}
 			end
@@ -141,7 +145,8 @@ function filter_close()
 		-- A candidate reaching back into one already emitted is
 		-- dropped, so no run of text is ever wrapped twice.
 		if candidate.start >= pos then
-			out[#out + 1] = string.sub(text, pos, candidate.start - 1)
+			out[#out + 1] =
+				string.sub(text, pos, candidate.start - 1)
 			out[#out + 1] = candidate.link
 			pos = candidate.stop + 1
 		end