[#245] Convert helper into a module

helper.zsh

@@ -1,93 +0,0 @@
-#
-# Defines helper functions.
-#
-# Authors:
-#   Sorin Ionescu <sorin.ionescu@gmail.com>
-#
-
-# Checks a boolean variable for "true".
-# Case insensitive: "1", "y", "yes", "t", "true", "o", and "on".
-function is-true {
-  [[ -n "$1" && "$1" == (1|[Yy]([Ee][Ss]|)|[Tt]([Rr][Uu][Ee]|)|[Oo]([Nn]|)) ]]
-}
-
-# Checks a name if it is a command, function, or alias.
-function is-callable {
-  (( $+commands[$1] )) || (( $+functions[$1] )) || (( $+aliases[$1] ))
-}
-
-# Prints the first non-empty string in the arguments array.
-function coalesce {
-  for arg in $argv; do
-    print "$arg"
-    return 0
-  done
-  return 1
-}
-
-# Checks if a file can be autoloaded by trying to load it in a subshell.
-function autoloadable {
-  ( unfunction $1 ; autoload -U +X $1 ) &> /dev/null
-}
-
-# Loads Prezto modules.
-function pmodload {
-  local -a pmodules
-  local pmodule
-  local pfunction_glob='^([_.]*|prompt_*_setup|README*)(.N:t)'
-
-  # $argv is overridden in the anonymous function.
-  pmodules=("$argv[@]")
-
-  # Add functions to $fpath.
-  fpath=(${pmodules:+${ZDOTDIR:-$HOME}/.zprezto/modules/${^pmodules}/functions(/FN)} $fpath)
-
-  function {
-    local pfunction
-
-    # Extended globbing is needed for listing autoloadable function directories.
-    setopt LOCAL_OPTIONS EXTENDED_GLOB
-
-    # Load Prezto functions.
-    for pfunction in ${ZDOTDIR:-$HOME}/.zprezto/modules/${^pmodules}/functions/$~pfunction_glob; do
-      autoload -Uz "$pfunction"
-    done
-  }
-
-  # Load Prezto modules.
-  for pmodule in "$pmodules[@]"; do
-    if zstyle -t ":prezto:module:$pmodule" loaded; then
-      continue
-    elif [[ ! -d "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule" ]]; then
-      print "$0: no such module: $pmodule" >&2
-      continue
-    else
-      if [[ -s "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/init.zsh" ]]; then
-        source "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/init.zsh"
-      fi
-
-      if (( $? == 0 )); then
-        zstyle ":prezto:module:$pmodule" loaded 'yes'
-      else
-        # Remove the $fpath entry.
-        fpath[(r)${ZDOTDIR:-$HOME}/.zprezto/modules/${pmodule}/functions]=()
-
-        function {
-          local pfunction
-
-          # Extended globbing is needed for listing autoloadable function
-          # directories.
-          setopt LOCAL_OPTIONS EXTENDED_GLOB
-
-          # Unload Prezto functions.
-          for pfunction in ${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/functions/$~pfunction_glob; do
-            unfunction "$pfunction"
-          done
-        }
-
-        zstyle ":prezto:module:$pmodule" loaded 'no'
-      fi
-    fi
-  done
-}
-

init.zsh

@@ -5,6 +5,10 @@
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
 #
 
+#
+# Version Check
+#
+
 # Check for the minimum supported version.
 min_zsh_version='4.3.10'
 if ! autoload -Uz is-at-least || ! is-at-least "$min_zsh_version"; then
@@ -13,6 +17,75 @@ if ! autoload -Uz is-at-least || ! is-at-least "$min_zsh_version"; then
 fi
 unset min_zsh_version
 
+#
+# Module Loader
+#
+
+# Loads Prezto modules.
+function pmodload {
+  local -a pmodules
+  local pmodule
+  local pfunction_glob='^([_.]*|prompt_*_setup|README*)(.N:t)'
+
+  # $argv is overridden in the anonymous function.
+  pmodules=("$argv[@]")
+
+  # Add functions to $fpath.
+  fpath=(${pmodules:+${ZDOTDIR:-$HOME}/.zprezto/modules/${^pmodules}/functions(/FN)} $fpath)
+
+  function {
+    local pfunction
+
+    # Extended globbing is needed for listing autoloadable function directories.
+    setopt LOCAL_OPTIONS EXTENDED_GLOB
+
+    # Load Prezto functions.
+    for pfunction in ${ZDOTDIR:-$HOME}/.zprezto/modules/${^pmodules}/functions/$~pfunction_glob; do
+      autoload -Uz "$pfunction"
+    done
+  }
+
+  # Load Prezto modules.
+  for pmodule in "$pmodules[@]"; do
+    if zstyle -t ":prezto:module:$pmodule" loaded; then
+      continue
+    elif [[ ! -d "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule" ]]; then
+      print "$0: no such module: $pmodule" >&2
+      continue
+    else
+      if [[ -s "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/init.zsh" ]]; then
+        source "${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/init.zsh"
+      fi
+
+      if (( $? == 0 )); then
+        zstyle ":prezto:module:$pmodule" loaded 'yes'
+      else
+        # Remove the $fpath entry.
+        fpath[(r)${ZDOTDIR:-$HOME}/.zprezto/modules/${pmodule}/functions]=()
+
+        function {
+          local pfunction
+
+          # Extended globbing is needed for listing autoloadable function
+          # directories.
+          setopt LOCAL_OPTIONS EXTENDED_GLOB
+
+          # Unload Prezto functions.
+          for pfunction in ${ZDOTDIR:-$HOME}/.zprezto/modules/$pmodule/functions/$~pfunction_glob; do
+            unfunction "$pfunction"
+          done
+        }
+
+        zstyle ":prezto:module:$pmodule" loaded 'no'
+      fi
+    fi
+  done
+}
+
+#
+# Prezto Initialization
+#
+
 # Source the Prezto configuration file.
 if [[ -s "${ZDOTDIR:-$HOME}/.zpreztorc" ]]; then
   source "${ZDOTDIR:-$HOME}/.zpreztorc"
@@ -34,9 +107,6 @@ zstyle -a ':prezto:load' zfunction 'zfunctions'
 for zfunction ("$zfunctions[@]") autoload -Uz "$zfunction"
 unset zfunction{s,}
 
-# Source files (the order matters).
-source "${0:h}/helper.zsh"
-
 # Load Prezto modules.
 zstyle -a ':prezto:load' pmodule 'pmodules'
 pmodload "$pmodules[@]"

modules/helper/init.zsh

@@ -0,0 +1,32 @@
+#
+# Defines helper functions.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+# Checks a boolean variable for "true".
+# Case insensitive: "1", "y", "yes", "t", "true", "o", and "on".
+function is-true {
+  [[ -n "$1" && "$1" == (1|[Yy]([Ee][Ss]|)|[Tt]([Rr][Uu][Ee]|)|[Oo]([Nn]|)) ]]
+}
+
+# Checks a name if it is a command, function, or alias.
+function is-callable {
+  (( $+commands[$1] )) || (( $+functions[$1] )) || (( $+aliases[$1] ))
+}
+
+# Prints the first non-empty string in the arguments array.
+function coalesce {
+  for arg in $argv; do
+    print "$arg"
+    return 0
+  done
+  return 1
+}
+
+# Checks if a file can be autoloaded by trying to load it in a subshell.
+function autoloadable {
+  ( unfunction $1 ; autoload -U +X $1 ) &> /dev/null
+}
+

modules/prompt/functions/prompt_sorin_setup

@@ -8,6 +8,9 @@
 #   http://i.imgur.com/4CeOj.png
 #
 
+# Load dependencies.
+pmodload 'helper'
+
 function prompt_sorin_precmd {
   setopt LOCAL_OPTIONS
   unsetopt XTRACE KSH_ARRAYS

modules/ssh-agent/init.zsh

@@ -11,6 +11,9 @@
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
 #
 
+# Load dependencies.
+pmodload 'helper'
+
 # Return if requirements are not found.
 if (( ! $+commands[ssh-agent] )); then
   return 1

modules/utility/init.zsh

@@ -8,7 +8,7 @@
 #
 
 # Load dependencies.
-pmodload 'spectrum'
+pmodload 'helper' 'spectrum'
 
 # Correct commands.
 setopt CORRECT