grunt completion courtesy of @yonchu: https://github.com/yonchu/grunt-zsh-completion

plugins/grunt/grunt.plugin.zsh

+#compdef grunt
+# -----------------------------------------------------------------------------
+#  _grunt
+#
+#  Completion script for grunt.
+#   - https://github.com/gruntjs/grunt
+#   - https://github.com/gruntjs/grunt-cli
+#
+# -----------------------------------------------------------------------------
+#
+#  Version     : 0.1.0
+#  Author      : Yonchu <yuyuchu3333@gmail.com>
+#  License     : MIT License
+#  Repository  : https://github.com/yonchu/grunt-zsh-completion
+#  Last Change : 22 Jul 2013.
+#
+#  Copyright (c) 2013 Yonchu.
+#
+# -----------------------------------------------------------------------------
+# USAGE
+# -----
+#
+# Enable caching:
+#
+#   If you want to use the cache, set the followings in your .zshrc:
+#
+#     zstyle ':completion:*' use-cache yes
+#
+#
+# Settings:
+#
+#  - Show grunt file path:
+#      zstyle ':completion::complete:grunt::options:' show_grunt_path yes
+#
+#  - Cache expiration days (default: 7):
+#      zstyle ':completion::complete:grunt::options:' expire 1
+#
+#  - Not update options cache if target gruntfile is changed.
+#      zstyle ':completion::complete:grunt::options:' no_update_options yes
+#
+#  Note that if you change the zstyle settings,
+#  you should delete the cache file and restart zsh.
+#
+#    $ rm ~/.zcompcache/grunt
+#    $ exec zsh
+#
+# -----------------------------------------------------------------------------
+
+function _grunt() {
+    local curcontext="$curcontext" update_policy state
+    local show_grunt_path update_msg gruntfile opts tasks
+
+    # Setup cache-policy.
+    zstyle -s ":completion:${curcontext}:" cache-policy update_policy
+    if [[ -z $update_policy ]]; then
+        zstyle ":completion:${curcontext}:" cache-policy __grunt_caching_policy
+    fi
+
+    # Check show_path option.
+    zstyle -b ":completion:${curcontext}:options:" show_grunt_path show_grunt_path
+
+    # Get current gruntfile.
+    gruntfile=$(__grunt_get_gruntfile)
+
+    # Initialize opts and tasks.
+    opts=()
+    tasks=()
+
+    # Add help options.
+    opts+=('(- 1 *)'{-h,--help}'[Display this help text.]')
+
+    ## Complete without gruntfile.
+    if [[ ! -f $gruntfile ]]; then
+        _arguments "${opts[@]}"
+        return
+    fi
+
+    ## Complete with gruntfile.
+    # Retrieve cache.
+    if ! __grunt_update_cache "$gruntfile"; then
+        update_msg=' (cache updated)'
+    fi
+
+    # Make optioins completion.
+    if [[ ${#__grunt_opts} -gt 0 ]]; then
+        opts+=("${__grunt_opts[@]}")
+    fi
+
+    # Complete arguments.
+    _arguments \
+        "${opts[@]}" \
+        '*: :->tasks' \
+        && return
+
+    case $state in
+        tasks)
+            if [[ $show_grunt_path == 'yes' ]]; then
+                update_msg="$update_msg: ${${gruntfile/#$HOME/~}%/}"
+            fi
+            # Make tasks completion.
+            if [[ ${#__grunt_tasks} -gt 0 ]]; then
+                tasks+=("${__grunt_tasks[@]}")
+                _describe -t grunt-task "$verbose grunt task$update_msg" tasks || return 1
+            fi
+        ;;
+    esac
+
+    return 0
+}
+
+# Cache policy:
+#   The cache file name: grunt
+#   The cache variable name: __grunt_version __grunt_gruntfile __grunt_opts __grunt_tasks
+function __grunt_update_cache() {
+    # TODO
+    local version='0.1.0'
+    local is_updating=0
+    local gruntfile="$1"
+    local grunt_info no_update_options cache_path
+
+    # Check no_update_options option.
+    zstyle -b ":completion:${curcontext}:options:" no_update_options no_update_options
+
+
+    if ! ( ((  $+__grunt_gruntfile )) \
+        && (( $+__grunt_opts )) \
+        && (( $+__grunt_tasks )) ) \
+        && ! _retrieve_cache 'grunt'; then
+        is_updating=1
+    fi
+
+    if [[ $gruntfile != $__grunt_gruntfile ]]; then
+        # Except for --help options.
+        __grunt_gruntfile=$gruntfile
+        if [[ $no_update_options == 'yes' ]]; then
+            if [[ $PREFIX == ${PREFIX#-} ]]; then
+                # Not options completions.
+                is_updating=1
+            elif [[ ${#__grunt_opts} -lt 2 ]]; then
+                is_updating=1
+            else
+                unset __grunt_gruntfile
+            fi
+        else
+            is_updating=1
+        fi
+    else
+        if [[ $PREFIX != ${PREFIX#-} && ${#__grunt_opts} -gt 1 ]]; then
+            unset __grunt_gruntfile
+        fi
+    fi
+
+    if _cache_invalid 'grunt'; then
+        is_updating=1
+    fi
+
+    # Check _grunt version.
+    if [[ $__grunt_version != $version ]]; then
+        is_updating=1
+    fi
+
+    if [[ $is_updating -ne 0 ]]; then
+        # Update caceh.
+        __grunt_version=$version
+        __grunt_gruntfile=$gruntfile
+        is_updating=1
+        grunt_info=$(grunt --help --no-color --gruntfile "$__grunt_gruntfile" 2>/dev/null)
+        __grunt_opts=(${(f)"$(__grunt_get_opts "$grunt_info")"})
+        __grunt_tasks=(${(f)"$(__grunt_get_tasks "$grunt_info")"})
+        _store_cache 'grunt' __grunt_version __grunt_gruntfile __grunt_opts __grunt_tasks
+    fi
+    return $is_updating
+}
+
+function __grunt_get_tasks() {
+    echo -E "$1" \
+        | grep 'Available tasks' -A 100 \
+        | grep '^ ' \
+        | sed -e 's/^[[:blank:]]*//' -e 's/[[:blank:]]*$//' \
+        | sed -e 's/  /:/'
+}
+
+function __grunt_get_opts() {
+    local opt_hunk opt_sep opt_num line opt
+    opt_hunk=$(echo -E "$1" \
+        | grep 'Options$' -A 100 \
+        | sed '1 d' \
+        | sed -e 's/[[:blank:]]*$//' \
+    )
+
+    opt_sep=()
+    opt_hunk=(${(f)opt_hunk})
+    opt_num=0
+    for line in "$opt_hunk[@]"; do
+        opt=$(echo -E "$line" | sed -e 's/^[[:blank:]]*//')
+        if [[ $line == $opt ]]; then
+            break
+        fi
+        if [[ $opt != ${opt#-} ]]; then
+            # Start with -
+            (( opt_num++ ))
+            opt=$(echo -E "$opt" | sed 's/^\(\(--[^ ]*\)\(, \(-[^ ]*\)\)*\)  */\2\\t\4\\\t/')
+        fi
+        opt_sep[$opt_num]=("${opt_sep[$opt_num]}${opt}")
+    done
+
+    for line in "$opt_sep[@]"; do
+        opt=(${(s:\t:)line})
+        if [[ ${opt[1]} == '--help' ]]; then
+            continue
+        fi
+        if [[ ${#opt} -eq 2 ]]; then
+            echo -E "(${opt[1]})${opt[1]}[${opt[2]}]"
+        else
+            echo -E "(${opt[1]},${opt[2]})${opt[1]}[${opt[3]}]"
+            echo -E "(${opt[1]},${opt[2]})${opt[2]}[${opt[3]}]"
+        fi
+    done
+}
+
+function __grunt_get_gruntfile() {
+    local gruntfile
+    local curpath="$PWD"
+    while [ "$curpath" ]; do
+        for gruntfile in "$curpath/"{G,g}runtfile.{js,coffee}; do
+            if [[ -e "$gruntfile" ]]; then
+                echo "$gruntfile"
+                return
+            fi
+        done
+        curpath=${curpath%/*}
+    done
+    return 1
+}
+
+function __grunt_caching_policy() {
+    # Returns status zero if the completions cache needs rebuilding.
+
+    # Rebuild if .agignore more recent than cache.
+    if [[ -f $__grunt_gruntfile && $__grunt_gruntfile -nt $1 ]]; then
+        # Invalid cache because gruntfile is old.
+        return 0
+    fi
+
+    local -a oldp
+    local expire
+    zstyle -s ":completion:${curcontext}:options:" expire expire || expire=7
+    # Rebuild if cache is more than $expire days.
+    oldp=( "$1"(Nm+$expire) )
+    (( $#oldp ))
+}
+
+compdef _grunt grunt