lib/cli: Add "cli.bash"

lib/cli.bash

@@ -0,0 +1,108 @@
+#!/usr/bin/env bash
+
+function omb {
+  [[ $# -gt 0 ]] || {
+    _omb::help
+    return 1
+  }
+
+  local command="$1"
+  shift
+
+  # Subcommand functions start with _ so that they don't
+  # appear as completion entries when looking for `omb`
+  (( $+functions[_omb::$command] )) || {
+    _omb::help
+    return 1
+  }
+
+  _omb::$command "$@"
+}
+
+function _omb {
+  local -a cmds subcmds
+  cmds=(
+    'changelog:Print the changelog'
+    'help:Usage information'
+    'plugin:Manage plugins'
+    'pr:Manage Oh My Bash Pull Requests'
+    'reload:Reload the current bash session'
+    'theme:Manage themes'
+    'update:Update Oh My Bash'
+    'version:Show the version'
+  )
+
+  if (( CURRENT == 2 )); then
+    _describe 'command' cmds
+  elif (( CURRENT == 3 )); then
+    case "$words[2]" in
+      changelog) local -a refs
+        refs=("${(@f)$(cd "$OSH"; command git for-each-ref --format="%(refname:short):%(subject)" refs/heads refs/tags)}")
+        _describe 'command' refs ;;
+      plugin) subcmds=(
+        'disable:Disable plugin(s)'
+        'enable:Enable plugin(s)'
+        'info:Get plugin information'
+        'list:List plugins'
+        'load:Load plugin(s)'
+      )
+        _describe 'command' subcmds ;;
+      pr) subcmds=('clean:Delete all Pull Request branches' 'test:Test a Pull Request')
+        _describe 'command' subcmds ;;
+      theme) subcmds=('list:List themes' 'set:Set a theme in your .zshrc file' 'use:Load a theme')
+        _describe 'command' subcmds ;;
+    esac
+  elif (( CURRENT == 4 )); then
+    case "${words[2]}::${words[3]}" in
+      plugin::(disable|enable|load))
+        local -aU valid_plugins
+
+        if [[ "${words[3]}" = disable ]]; then
+          # if command is "disable", only offer already enabled plugins
+          valid_plugins=($plugins)
+        else
+          valid_plugins=("$OSH"/plugins/*/{_*,*.plugin.zsh}(.N:h:t) "$OSH_CUSTOM"/plugins/*/{_*,*.plugin.zsh}(.N:h:t))
+          # if command is "enable", remove already enabled plugins
+          [[ "${words[3]}" = enable ]] && valid_plugins=(${valid_plugins:|plugins})
+        fi
+
+        _describe 'plugin' valid_plugins ;;
+      plugin::info)
+        local -aU plugins
+        plugins=("$OSH"/plugins/*/{_*,*.plugin.zsh}(.N:h:t) "$OSH_CUSTOM"/plugins/*/{_*,*.plugin.zsh}(.N:h:t))
+        _describe 'plugin' plugins ;;
+      theme::(set|use))
+        local -aU themes
+        themes=("$OSH"/themes/*.zsh-theme(.N:t:r) "$OSH_CUSTOM"/**/*.zsh-theme(.N:r:gs:"$OSH_CUSTOM"/themes/:::gs:"$OSH_CUSTOM"/:::))
+        _describe 'theme' themes ;;
+    esac
+  elif (( CURRENT > 4 )); then
+    case "${words[2]}::${words[3]}" in
+      plugin::(enable|disable|load))
+        local -aU valid_plugins
+
+        if [[ "${words[3]}" = disable ]]; then
+          # if command is "disable", only offer already enabled plugins
+          valid_plugins=($plugins)
+        else
+          valid_plugins=("$OSH"/plugins/*/{_*,*.plugin.zsh}(.N:h:t) "$OSH_CUSTOM"/plugins/*/{_*,*.plugin.zsh}(.N:h:t))
+          # if command is "enable", remove already enabled plugins
+          [[ "${words[3]}" = enable ]] && valid_plugins=(${valid_plugins:|plugins})
+        fi
+
+        # Remove plugins already passed as arguments
+        # NOTE: $(( CURRENT - 1 )) is the last plugin argument completely passed, i.e. that which
+        # has a space after them. This is to avoid removing plugins partially passed, which makes
+        # the completion not add a space after the completed plugin.
+        local -a args
+        args=(${words[4,$(( CURRENT - 1))]})
+        valid_plugins=(${valid_plugins:|args})
+
+        _describe 'plugin' valid_plugins ;;
+    esac
+  fi
+
+  return 0
+}
+
+compdef _omb omb