feat(golang): use goenv to install and manage Go versions

zsh/golang.zsh

@@ -2,6 +2,37 @@
 # Go (golang) environment setup.
 #
 
+# ==============================================================================
+# goenv
+# ==============================================================================
+
+# install goenv
+zinit ice wait lucid as'program' pick'bin/goenv' from'gh' \
+  atclone'src/configure && make -C src' atpull'%atclone' nocompile'!'
+zinit light syndbg/goenv
+
+zinit ice wait lucid as'program' pick'plugins/go-build/bin/go-build' from'gh' \
+  id-as'syndbg/go-build'
+zinit light syndbg/goenv
+
+# lazy-load goenv
+goenv() {
+  load-goenv
+  goenv "$@"
+}
+
+_goenv() {
+  load-goenv
+  _goenv "$@"
+}
+
+compctl -K _goenv goenv
+
+load-goenv() {
+  unset -f load-goenv _goenv goenv
+  eval "$(command goenv init -)"
+}
+
 # ==============================================================================
 # global golang packages
 # ==============================================================================

zshenv

@@ -137,10 +137,6 @@ path_append "/opt/flutter/bin/cache/dart-sdk/bin"
 # Use gnu-getop if available
 path_prepend "/usr/local/opt/gnu-getopt/bin"
 
-# Go (golang) environment setup
-export GOPATH="$HOME/.go"
-path_prepend "$GOPATH/bin"
-
 # Homebrew setup
 export HOMEBREW_NO_ANALYTICS=1
 
@@ -153,6 +149,10 @@ path_prepend "/opt/emacs/bin"
 # Use custom tmux install if available
 path_prepend "/opt/tmux/bin"
 
+# Go setup for golang (./zsh/golang.zsh)
+path_prepend "$HOME/.goenv/shims"
+export GOENV_GOPATH_PREFIX="$HOME/.goenv/go"
+
 # Ruby setup for rbenv (./zsh/ruby.zsh)
 path_prepend "$HOME/.rbenv/shims"
 path_prepend "$HOME/.rbenv/bin"