From a2bf5c7b99ef1c10d335ed79236dacbb78dd0639 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Cornell=C3=A0?= <marc@mcornella.com>
Date: Tue, 23 Jul 2024 15:59:38 +0200
Subject: [PATCH] refactor(gem): favor built-in zsh completion for `gem`
 (#12576)

Completion for `gem` was included in zsh 5.5 and newer. This change
only uses the Oh My Zsh one if running an older version.

Reference: https://github.com/zsh-users/zsh/commit/9881778d48caf842f794d986bc9befebf0fb01c2
---
 plugins/gem/{ => completions}/_gem |  0
 plugins/gem/gem.plugin.zsh         | 27 ++++++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)
 rename plugins/gem/{ => completions}/_gem (100%)

diff --git a/plugins/gem/_gem b/plugins/gem/completions/_gem
similarity index 100%
rename from plugins/gem/_gem
rename to plugins/gem/completions/_gem
diff --git a/plugins/gem/gem.plugin.zsh b/plugins/gem/gem.plugin.zsh
index 938f5c993..b8a49fb56 100644
--- a/plugins/gem/gem.plugin.zsh
+++ b/plugins/gem/gem.plugin.zsh
@@ -4,4 +4,29 @@ alias gemp="gem push *.gem"
 # gemy GEM 0.0.0 = gem yank GEM -v 0.0.0
 function gemy {
 	gem yank $1 -v $2
-}
\ No newline at end of file
+}
+
+# If the completion file doesn't exist yet, we need to autoload it and
+# bind it to `gem`. Otherwise, compinit will have already done that.
+if [[ ! -f "$ZSH_CACHE_DIR/completions/_gem" ]]; then
+  typeset -g -A _comps
+  autoload -Uz _gem
+  _comps[docker]=_gem
+fi
+
+# zsh 5.5 already provides completion for `_gem`. With this we ensure that
+# our provided completion (which is not optimal but is enough in most cases)
+# is used for older versions
+autoload -Uz is-at-least
+if is-at-least 5.5; then
+  return 0
+fi
+
+{
+  # Standarized $0 handling
+  # https://zdharma-continuum.github.io/Zsh-100-Commits-Club/Zsh-Plugin-Standard.html
+  0="${${ZERO:-${0:#$ZSH_ARGZERO}}:-${(%):-%N}}"
+  0="${${(M)0:#/*}:-$PWD/$0}"
+
+  command cp -f "${0:h}/completions/_gem" "$ZSH_CACHE_DIR/completions/_gem"
+} &|