From 3d816c9e1f0af6dde3b18169b4abeaae61d4bf83 Mon Sep 17 00:00:00 2001
From: Joseph Wright <joseph@texdev.net>
Date: Tue, 15 Oct 2024 14:08:59 +0100
Subject: [PATCH] Add --dev switch

---
 CHANGELOG.md          | 3 +++
 l3build-arguments.lua | 5 +++++
 l3build.dtx           | 1 +
 l3build.lua           | 4 ++++
 4 files changed, 13 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1355a643..3a45a60b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ this project uses date-based 'snapshot' version identifiers.
 
 ## [Unreleased]
 
+### Added
+- `--dev` switch to run tests using development format
+
 ## [2024-10-08]
 
 ### Fixed
diff --git a/l3build-arguments.lua b/l3build-arguments.lua
index ac34f90f..e1c189db 100644
--- a/l3build-arguments.lua
+++ b/l3build-arguments.lua
@@ -53,6 +53,11 @@ option_list =
         desc = "Runs target in debug mode",
         type = "boolean"
       },
+    dev =
+      {
+        desc = "Use the development LaTeX format",
+        type = "boolean"
+      },
     dirty =
       {
         desc = "Skips cleaning up the test area",
diff --git a/l3build.dtx b/l3build.dtx
index 140c9516..ec286866 100644
--- a/l3build.dtx
+++ b/l3build.dtx
@@ -371,6 +371,7 @@
 % \item |--config| (|-c|) Configuration(s) to use for testing
 % \item |--date| (|-d|) Date to use when tagging data
 % \item |--debug| Runs the target in debug mode (not supported by all targets)
+% \item |--dev| Runs \LaTeX{} checks using the development format
 % \item |--dirty| Skips cleaning up of the test area
 % \item |--dry-run| Runs the \texttt{install} target but does not copy
 %   any files: simply lists those that would be installed
diff --git a/l3build.lua b/l3build.lua
index 675806dd..7547758f 100644
--- a/l3build.lua
+++ b/l3build.lua
@@ -131,6 +131,10 @@ if forcedocepoch then
     typesetopts = typesetopts .. " -utc"
   end
 end
+-- Allow for LaTeX "dev" release
+if options["dev"] and checkformat == "latex" then
+  checkformat = "latex-dev"
+end
 
 --
 -- Deal with multiple configs for tests