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From: dana <dana@dana.is>
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Subject: [PATCH] Completion: Add _lua
Message-Id: <84B28497-6E79-439D-BFB5-CDD32D6BECB5@dana.is>
Date: Mon, 23 Jul 2018 01:50:05 -0500
To: Zsh hackers list <zsh-workers@zsh.org>
X-Mailer: Apple Mail (2.3445.8.2)

Add completion for the Lua command-line interpreter.

_lua_libraries is maybe a little excessive, tbh, but i found it useful =
=E2=80=94 i don't
think there's any 'official' way to do what it does.

dana


diff --git a/Completion/Unix/Command/_lua b/Completion/Unix/Command/_lua
new file mode 100644
index 000000000..e11cd226c
--- /dev/null
+++ b/Completion/Unix/Command/_lua
@@ -0,0 +1,48 @@
+#compdef lua -P lua[0-9.-]##
+
+# Complete lua library names. We go out of our way here to support =
sub-modules
+# (of the format foo.bar.baz), even though the way `lua -l` handles =
those isn't
+# very nice, because it might be useful for informational purposes
+(( $+functions[_lua_libraries] )) ||
+_lua_libraries() {
+  local p
+  local -a tmp tmp2 pre
+
+  # Lua will tell us its effective search paths in the error message
+  tmp=3D( ${(f)"$( _call_program libraries $words[1] -l '"%%FAKE%%"' =
2>&1 )"} )
+
+  [[ $tmp =3D=3D *'%%FAKE%%'* ]] && {
+    tmp=3D( ${(@M)tmp:#*no file*'%%FAKE%%'*} )
+    tmp=3D( ${(@)tmp##[[:space:]]#no file[[:space:]\'\"]##} )
+    tmp=3D( ${(@)tmp%%[[:space:]\'\"]##} )
+
+    for p in $tmp; do
+      pre+=3D( ${(b)p%%'%%FAKE%%'*} )
+      # Don't recurse infinitely into the current directory; we'll just =
trust
+      # that all other paths are sensible
+      if [[ $p =3D=3D './%%FAKE%%'* ]]; then
+        tmp2+=3D( ${~${${(b)p}/'%%FAKE%%'/'*'}}(#qN) )
+      else
+        tmp2+=3D( ${~${${(b)p}/'%%FAKE%%'/'**/*'}}(#qN) )
+      fi
+    done
+
+    tmp=3D( $tmp2 )
+    tmp=3D( ${(@)tmp%%(.lua|/init.lua|.so)} )
+    tmp=3D( ${(@)tmp##(${~${(j<|>)pre}})} )
+    tmp=3D( ${(@u)${(@)tmp//\//.}} )
+  }
+
+  _wanted -x libraries expl 'Lua library' compadd -a "$@" - tmp
+}
+
+# Stacking not supported, no arguments are exclusive except `-`
+_arguments -S -A '-*' : \
+  '*-e+[execute specified command string]:command string' \
+  '-E[ignore environment variables]' \
+  '-i[enter interactive mode]' \
+  '*-l+[specify library or module to require]: :_lua_libraries' \
+  '-v[display version information]' \
+  '(1 -)-[stop argument parsing and execute script on stdin]' \
+  '1:Lua script:_files' \
+  '*:script argument'