Add zsh completion script

Fixes #103

Closes: #1727
Approved by: alexlarsson

Makefile.am

@@ -115,9 +115,13 @@ if PRIV_MODE_SETUID
 endif # !PRIV_MODE_SETUID
 endif # !WITH_SYSTEM_BWRAP
 
-completiondir = $(datadir)/bash-completion/completions
-completion_DATA = completion/flatpak
-EXTRA_DIST += $(completion_DATA)
+bashcompletiondir = $(datadir)/bash-completion/completions
+bashcompletion_DATA = completion/flatpak
+EXTRA_DIST += $(bashcompletion_DATA)
+
+zshcompletiondir = $(datadir)/zsh/site-functions
+zshcompletion_DATA = completion/_flatpak
+EXTRA_DIST += $(zshcompletion_DATA)
 
 profiledir = $(PROFILE_DIR)
 profile_DATA = flatpak.sh

completion/_flatpak

@@ -0,0 +1,27 @@
+#compdef flatpak
+
+emulate -L zsh
+
+local index
+(( index = ${(c)#words[0,CURRENT]} + $#PREFIX + 1 ))
+
+
+local resp=($(flatpak complete "$words" $index "$words[CURRENT]"))
+
+_description options opt_expl option
+_description arguments arg_expl argument
+
+local match
+for match in $resp; do
+  case $match in
+    __FLATPAK_FILE) _files;;
+    __FLATPAK_BUNDLE_FILE) _path_files -g '*.flatpak';;
+    __FLATPAK_BUNDLE_OR_REF_FILE) _path_files -g '*.flatpak(|ref)';;
+    __FLATPAK_DIR) _path_files -/;;
+    -*=) compadd $opt_expl[@] -S "" -- $match;;
+    -*) compadd $opt_expl[@] -- $match;;
+    *) compadd $arg_expl[@] $match;;
+  esac
+done
+
+# vim: ft=zsh