Add l3build

Modified from rejected https://github.com/latex3/l3build/pull/267

src/_l3build

@@ -0,0 +1,59 @@
+#compdef l3build
+# ------------------------------------------------------------------------------
+# Description
+# -----------
+#
+#  Completion script for l3build (https://github.com/latex3/l3build/).
+#  Modified from rejected https://github.com/latex3/l3build/pull/267
+#
+# ------------------------------------------------------------------------------
+# Authors
+# -------
+#
+#  * Wu Zhenyu <wuzhenyu@ustc.edu>
+#
+# ------------------------------------------------------------------------------
+
+__l3build() {
+  local targets=(
+    'check:Run\ all\ automated\ tests'
+    'clean:Clean\ out\ directory\ tree'
+    'ctan:Create\ CTAN-ready\ archive'
+    'doc:Typesets\ all\ documentation\ files'
+    'install:Installs\ files\ into\ the\ local\ texmf\ tree'
+    'manifest:Creates\ a\ manifest\ file'
+    'save:Saves\ test\ validation\ log'
+    'tag:Updates\ release\ tags\ in\ files'
+    'uninstall:Uninstalls\ files\ from\ the\ local\ texmf\ tree'
+    'unpack:Unpacks\ the\ source\ files\ into\ the\ build\ tree'
+    'upload:Send\ archive\ to\ CTAN\ for\ public\ release'
+  )
+  local options=(
+    {--config,-c}'[Sets the config(s) used for running tests]':lua_file:'_files -g "*.lua"'
+    --date'[Sets the date to insert into sources]':
+    --debug'[Runs target in debug mode]'
+    --dirty'[Skip cleaning up the test area]'
+    --dry-run'[Dry run for install or upload]'
+    --email'[Email address of CTAN uploader]':
+    {--engine,-e}'[Sets the engine(s) to use for running test]':engine:'(pdftex xetex luatex ptex uptex)'
+    --epoch'[Sets the epoch for tests and typesetting]':
+    {--file,-F}'[Take the upload announcement from the given file]':file:_files
+    --first'[Name of first test to run]':
+    {--force,-f}'[Force tests to run if engine is not set up]'
+    --full'[Install all files]'
+    {--halt-on-error,-H}'[Stops running tests after the first failure]'
+    '(- : *)'{--help,-h}'[Print this message and exit]'
+    --last'[Name of last test to run]':
+    {--message,-m}'[Text for upload announcement message]':
+    {--quiet,-q}'[Suppresses TeX output when unpacking]'
+    --rerun'[Skip setup\: simply rerun tests]'
+    --show-log-on-error'[Show the full log of the failure with '\''halt-on-error'\'']'
+    {--show-saves,-S}'[Show the invocation to update failing .tlg files]'
+    --shuffle'[Shuffle order of tests]'
+    --texmfhome'[Location of user texmf tree]':
+    '(- : *)'--version'[Print version information and exit]'
+  )
+  _arguments -s -S $options "1:target:(($targets))"
+}
+
+__l3build