Remove PYENV_DEACTIVATE (fixes #121)

This means that pyenv-virtualenv will not allow manual deactivation of
virtualenv if pyenv-virtualenv-init is enabled. This must be acceptable
since the activation of virtualenv is just setting of environment
variables in current implementation.

bin/pyenv-sh-activate

@@ -14,6 +14,10 @@
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
 
+if [ -z "${PYENV_ROOT}" ]; then
+  PYENV_ROOT="$(pyenv-root)"
+fi
+
 resolve_link() {
   $(type -p greadlink readlink | head -1) "$1"
 }
@@ -66,7 +70,7 @@ fi
 venv="${versions}"
 
 # exit as success if some virtualenv outside from pyenv is already activated
-if [ -n "${VIRTUAL_ENV}" ]; then
+if [ -n "${VIRTUAL_ENV}" ] && [[ "${VIRTUAL_ENV}" == "${VIRTUAL_ENV#${PYENV_ROOT}/versions/}" ]]; then
   if [ -z "${FORCE}" ]; then
     if [ -z "${QUIET}" ]; then
       echo "pyenv-virtualenv: virtualenv \`${VIRTUAL_ENV}' is already activated" 1>&2
@@ -77,7 +81,7 @@ if [ -n "${VIRTUAL_ENV}" ]; then
 fi
 
 if ! pyenv-virtualenv-prefix "${venv}" 1>/dev/null 2>&1; then
-  if [ -z "$QUIET" ]; then
+  if [ -z "${QUIET}" ]; then
     echo "pyenv-virtualenv: version \`${venv}' is not a virtualenv" 1>&2
   fi
   echo "false"
@@ -89,7 +93,7 @@ fi
 for version in "${versions[@]}"; do
   if [[ "${version}" != "${venv}" ]]; then
     if pyenv-virtualenv-prefix "${version}" 1>/dev/null 2>&1; then
-      if [ -z "$QUIET" ]; then
+      if [ -z "${QUIET}" ]; then
         echo "pyenv-virtualenv: cannot activate multiple versions at once: ${versions[@]}" 1>&2
       fi
       echo "false"
@@ -116,16 +120,6 @@ if [[ "${VIRTUAL_ENV}" == "${prefix}" ]]; then
   fi
 fi
 
-if [[ "${PYENV_DEACTIVATE}" == "${prefix}" ]]; then
-  if [ -z "${FORCE}" ]; then
-    if [ -z "${QUIET}" ]; then
-      echo "pyenv-virtualenv: \`${venv}' is marked deactivated. use \`pyenv activate --force ${venv}' to activate forcibly." 1>&2
-    fi
-    echo "false"
-    exit 1
-  fi
-fi
-
 # Display setup instruction, if pyenv-virtualenv has not been initialized.
 # if 'pyenv virtualenv-init -' is not found in "$profile"
 if [ -z "$PYENV_VIRTUALENV_INIT" ]; then
@@ -161,16 +155,10 @@ fi
 # virtualenv/pyvenv
 case "${shell}" in
 fish )
-  cat <<EOS
-set -e PYENV_DEACTIVATE;
-setenv VIRTUAL_ENV "${prefix}";
-EOS
+  echo "setenv VIRTUAL_ENV \"${prefix}\";"
   ;;
 * )
-  cat <<EOS
-unset PYENV_DEACTIVATE;
-export VIRTUAL_ENV="${prefix}";
-EOS
+  echo "export VIRTUAL_ENV=\"${prefix}\";"
   ;;
 esac
 

bin/pyenv-sh-deactivate

@@ -32,11 +32,13 @@ while [ $# -gt 0 ]; do
 done
 
 if [ -z "${VIRTUAL_ENV}" ]; then
-  if [ -z "$QUIET" ]; then
-    echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2
+  if [ -z "${FORCE}" ]; then
+    if [ -z "${QUIET}" ]; then
+      echo "pyenv-virtualenv: no virtualenv has been activated." 1>&2
+    fi
+    echo "false"
+    exit 1
   fi
-  echo "false"
-  exit 1
 fi
 
 shell="$(basename "${PYENV_SHELL:-$SHELL}")"
@@ -72,20 +74,13 @@ fi
 # virtualenv/pyvenv
 case "${shell}" in
 fish )
-  cat <<EOS
-setenv PYENV_DEACTIVATE "${VIRTUAL_ENV}";
-set -e VIRTUAL_ENV;
-EOS
+  echo "set -e VIRTUAL_ENV;"
   ;;
 * )
-  cat <<EOS
-export PYENV_DEACTIVATE="${VIRTUAL_ENV}";
-unset VIRTUAL_ENV;
-EOS
+  echo "unset VIRTUAL_ENV;"
   ;;
 esac
 
-
 # anaconda/miniconda
 if [ -n "${CONDA_DEFAULT_ENV}" ]; then
   case "${shell}" in

bin/pyenv-virtualenv

@@ -11,6 +11,10 @@
 
 PYENV_VIRTUALENV_VERSION="20151103"
 
+if [ -z "${PYENV_ROOT}" ]; then
+  PYENV_ROOT="$(pyenv-root)"
+fi
+
 set -e
 [ -n "$PYENV_DEBUG" ] && set -x
 
@@ -19,10 +23,6 @@ if [ "$1" = "--complete" ]; then
   exec pyenv-versions --bare
 fi
 
-if [ -z "$PYENV_ROOT" ]; then
-  PYENV_ROOT="${HOME}/.pyenv"
-fi
-
 unset PIP_REQUIRE_VENV
 unset PIP_REQUIRE_VIRTUALENV
 
@@ -105,7 +105,7 @@ version() {
   local version
   if [ -n "$USE_PYVENV" ]; then
     version="$(pyenv-which pyvenv 2>/dev/null || true)"
-    version="${version#$(pyenv-root)/versions/}"
+    version="${version#${PYENV_ROOT}/versions/}"
     version="${version%/bin/pyvenv}"
     echo "pyenv-virtualenv ${PYENV_VIRTUALENV_VERSION} (pyvenv ${version:-unknown})"
   else