From db37bb96434e03681c53b4b835aef572a87184d8 Mon Sep 17 00:00:00 2001
From: Yamashita Yuu <yamashita@geishatokyo.com>
Date: Tue, 7 May 2013 22:31:12 +0900
Subject: [PATCH] Download `virtualenv.py` if specified version has not been
 installed.

---
 .gitignore                                     |  8 ++++----
 README.md                                      |  3 ++-
 bin/pyenv-virtualenv                           | 18 ++++++++++++++++--
 install.sh                                     |  4 ++--
 .../pyenv-virtualenv/{ => 1.9.1}/virtualenv.py |  0
 5 files changed, 24 insertions(+), 9 deletions(-)
 rename libexec/pyenv-virtualenv/{ => 1.9.1}/virtualenv.py (100%)

diff --git a/.gitignore b/.gitignore
index a097bf0..c860e56 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
-/libexec/*.class
-/libexec/*.pyc
-/libexec/*.pyo
-/libexec/__pycache__
+/libexec/pyenv-virtualenv/*/*.class
+/libexec/pyenv-virtualenv/*/*.pyc
+/libexec/pyenv-virtualenv/*/*.pyo
+/libexec/pyenv-virtualenv/*/__pycache__
 *.swo
 *.swp
diff --git a/README.md b/README.md
index 29d04f7..0f83536 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,8 @@ under `~/.pyenv/versions`.
 #### 2013XXYY
 
  * Remove `python-virtualenv` which was no longer used.
- * Change the installation path of the `virtualenv.py` script. (`./libexec` -> `./libexec/pyenv-virtualenv`)
+ * Change the installation path of the `virtualenv.py` script. (`./libexec` -> `./libexec/pyenv-virtualenv/${VIRTUALENV_VERSION}`)
+ * Download `virtualenv.py` if specified version has not been installed.
 
 #### 20130507
 
diff --git a/bin/pyenv-virtualenv b/bin/pyenv-virtualenv
index 7070d73..ad563b9 100755
--- a/bin/pyenv-virtualenv
+++ b/bin/pyenv-virtualenv
@@ -107,6 +107,15 @@ usage() {
   [ -z "$1" ] || exit "$1"
 }
 
+ensure_virtualenv() {
+  local file="$1"
+  local url="$2"
+  [ -f "${file}" ] || {
+    mkdir -p "$(dirname "${file}")"
+    http get "${url}" "${file}"
+  }
+}
+
 PYENV_VIRTUALENV_ROOT="$(abs_dirname "$0")/.."
 if [ -z "${PYENV_VIRTUALENV_CACHE_PATH}" ]; then
   PYENV_VIRTUALENV_CACHE_PATH="${PYTHON_BUILD_CACHE_PATH:-${PYENV_ROOT}/cache}"
@@ -114,9 +123,14 @@ fi
 if [ -z "${PYENV_VIRTUALENV_SCRIPT_PATH}" ]; then
   PYENV_VIRTUALENV_SCRIPT_PATH="${PYENV_VIRTUALENV_ROOT}/libexec/pyenv-virtualenv"
 fi
-VIRTUALENV="${PYENV_VIRTUALENV_SCRIPT_PATH}/virtualenv.py"
+VIRTUALENV="${PYENV_VIRTUALENV_SCRIPT_PATH}/${VIRTUALENV_VERSION}/virtualenv.py"
 VIRTUALENV_OPTIONS=()
 
+ensure_virtualenv "${VIRTUALENV}" "https://raw.github.com/pypa/virtualenv/${VIRTUALENV_VERSION}/virtualenv.py" || {
+  echo "pyenv-virtualenv: could not find virtualenv script: ${VIRTUALENV}" 1>&2
+  exit 1
+}
+
 parse_options "$@"
 for option in "${OPTIONS[@]}"; do
   case "$option" in
@@ -142,7 +156,7 @@ done
 
 PYTHON_BIN=$(PYENV_VERSION="${VERSION_NAME}" pyenv-which python)
 if [ ! -x "${PYTHON_BIN}" ]; then
-  echo "pyenv-virtualenv: could not find python executable: ${PYTHON_BIN}" >&2
+  echo "pyenv-virtualenv: could not find python executable: ${PYTHON_BIN}" 1>&2
   exit 1
 fi
 
diff --git a/install.sh b/install.sh
index fa433bc..062e588 100755
--- a/install.sh
+++ b/install.sh
@@ -16,8 +16,8 @@ for file in bin/*; do
   cp "${file}" "${BIN_PATH}"
 done
 
-for file in libexec/pyenv-virtualenv/*.py; do
-  cp "${file}" "${LIBEXEC_PATH}"
+for file in libexec/pyenv-virtualenv/*; do
+  cp -Rp "${file}" "${LIBEXEC_PATH}"
 done
 
 echo "Installed pyenv-virtualenv at ${PREFIX}"
diff --git a/libexec/pyenv-virtualenv/virtualenv.py b/libexec/pyenv-virtualenv/1.9.1/virtualenv.py
similarity index 100%
rename from libexec/pyenv-virtualenv/virtualenv.py
rename to libexec/pyenv-virtualenv/1.9.1/virtualenv.py