clean up pyenv and python resources

completion/available/pyenv.completion.bash

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# Bash completion support for pyenv
+
+if _command_exists pyenv && [[ -r "$(dirname $(readlink -f $(which pyenv)))/../completions/pyenv.bash" ]] ; then
+  source "$(dirname $(readlink -f $(which pyenv)))/../completions/pyenv.bash"
+fi

plugins/available/pyenv.plugin.bash

@@ -1,12 +1,30 @@
 cite about-plugin
 about-plugin 'load pyenv, if you are using it'
 
-export PYENV_ROOT="$HOME/.pyenv"
+# Load after basher
+# BASH_IT_LOAD_PRIORITY: 275
+
+# Don't modify the environment if we can't find the tool:
+# - Check if in $PATH already
+# - Check if installed manually to $PYENV_ROOT
+# - Check if installed manually to $HOME
+_command_exists pyenv ||
+  [[ -n "$PYENV_ROOT" && -x "$PYENV_ROOT/bin/pyenv" ]] ||
+  [[ -x "$HOME/.pyenv/bin/pyenv" ]] ||
+  return 0
+
+# Set PYENV_ROOT, if not already set
+export PYENV_ROOT="${PYENV_ROOT:-$HOME/.pyenv}"
+
+# Add PYENV_ROOT/bin to PATH, if that's where it's installed
+if ! _command_exists pyenv && [[ -x "$PYENV_ROOT/bin/pyenv" ]] ; then
   pathmunge "$PYENV_ROOT/bin"
-
-[[ `which pyenv 2>/dev/null` ]] && eval "$(pyenv init - bash)"
-
-#Load pyenv virtualenv if the virtualenv plugin is installed.
-if pyenv virtualenv-init - &> /dev/null; then
-  eval "$(pyenv virtualenv-init - bash)"
 fi
+
+# Initialize pyenv
+eval "$(pyenv init - bash)"
+
+# Load pyenv virtualenv if the plugin is installed
+! _command_exists 'pyenv virtualenv --help' \
+  "pyenv plugin 'virtualenv' is not installed - skipping" ||
+    eval "$(pyenv virtualenv-init - bash)"

plugins/available/python.plugin.bash

@@ -1,8 +1,13 @@
 cite about-plugin
 about-plugin 'alias "shttp" to SimpleHTTPServer'
 
-if [ $(uname) = "Linux" ]
+# Load after pyenv
-then
+# BASH_IT_LOAD_PRIORITY: 285
+
+# Check python version to ensure pyenv can find python
+{ _command_exists python && python --version &>/dev/null ; } || return 0
+
+if [[ "$(uname -s)" == 'Linux' ]] ; then
   alias shttp='python2 -m SimpleHTTPServer'
 else
   alias shttp='python -m SimpleHTTPServer'
@@ -14,9 +19,9 @@ function pyedit() {
     example '$ pyedit requests'
     group 'python'
 
-    xpyc=`python -c "import os, sys; f = open(os.devnull, 'w'); sys.stderr = f; module = __import__('$1'); sys.stdout.write(module.__file__)"`
+    xpyc=$(python -c "import os, sys; f = open(os.devnull, 'w'); sys.stderr = f; module = __import__('$1'); sys.stdout.write(module.__file__)")
 
-    if [ "$xpyc" == "" ]; then
+    if [[ "$xpyc" == "" ]]; then
         echo "Python module $1 not found"
         return -1