Merge remote-tracking branch 'origin/master'

.gitignore

 *.pyc
 site
+.DS_Store

CHANGELOG.md

 # Python Buildpack Changelog
 
+## 100
+
+Preliminary pipenv support.
+
 ## 99
 
 Cleanup.

bin/compile

@@ -42,7 +42,7 @@ export WARNINGS_LOG=$(mktemp)
 export RECOMMENDED_PYTHON_VERSION=$DEFAULT_PYTHON_VERSION
 
 # Setup bpwatch
-export PATH=$PATH:$ROOT_DIR/vendor/bpwatch
+export PATH=$PATH:$ROOT_DIR/vendor/:$ROOT_DIR/vendor/bpwatch
 LOGPLEX_KEY="t.b90d9d29-5388-4908-9737-b4576af1d4ce"
 export BPWATCH_STORE_PATH=$CACHE_DIR/bpwatch.json
 BUILDPACK_VERSION=v28
@@ -107,12 +107,6 @@ bpwatch start pre_compile
   source $BIN_DIR/steps/hooks/pre_compile
 bpwatch stop pre_compile
 
-# If no requirements.txt file given, assume `setup.py develop` is intended.
-if [ ! -f requirements.txt ]; then
-  echo "-e ." > requirements.txt
-fi
-
-
 # Sticky runtimes.
 if [ -f $CACHE_DIR/.heroku/python-version ]; then
   DEFAULT_PYTHON_VERSION=$(cat $CACHE_DIR/.heroku/python-version)
@@ -125,6 +119,9 @@ else
   CACHED_PYTHON_STACK=$STACK
 fi
 
+# Pipenv Python version support.
+source $BIN_DIR/steps/pipenv-python-version
+
 # If no runtime given, assume default version.
 if [ ! -f runtime.txt ]; then
   echo $DEFAULT_PYTHON_VERSION > runtime.txt
@@ -172,6 +169,14 @@ source $BIN_DIR/steps/python
 # Sanity check for setuptools/distribute.
 source $BIN_DIR/steps/setuptools
 
+# Pipenv support.
+source $BIN_DIR/steps/pipenv
+
+# If no requirements.txt file given, assume `setup.py develop` is intended.
+if [ ! -f requirements.txt ]; then
+  echo "-e ." > requirements.txt
+fi
+
 # Uninstall removed dependencies with Pip.
 source $BIN_DIR/steps/pip-uninstall
 

bin/detect

@@ -15,7 +15,7 @@
 BUILD_DIR=$1
 
 # Exit early if app is clearly not Python.
-if [ ! -f $BUILD_DIR/requirements.txt ] && [ ! -f $BUILD_DIR/setup.py ]; then
+if [ ! -f $BUILD_DIR/requirements.txt ] && [ ! -f $BUILD_DIR/setup.py ] && [ ! -f $BUILD_DIR/Pipfile ]; then
   exit 1
 fi
 

bin/steps/pipenv

+# Generate requriements.txt with pipenv.
+
+if [[ -f Pipfile ]]; then
+    if [[ ! -f requirements.txt ]]; then
+        puts-step "Generating 'requirements.txt' with pipenv"
+
+        pip install pipenv --upgrade &> /dev/null
+        pipenv lock --requirements > requirements.txt 2> /dev/null
+
+        pipstrip requirements.txt
+    fi
+fi
+

bin/steps/pipenv-python-version

+# Detect Python-version with Pipenv.
+
+if [[ -f $BUILD_DIR/Pipfile.lock ]]; then
+
+    if [[ ! -f $BUILD_DIR/runtime.txt ]]; then
+        if [[ ! -f Pipfile.lock ]]; then
+            pipenv lock 2> /dev/null
+        fi
+
+        set +e
+        PYTHON=$(cat $BUILD_DIR/Pipfile.lock | jq '._meta.requires.python_version' -r)
+        set -e
+
+        if [ "$PYTHON" = 2.7 ]; then
+            echo "python-2.7.13" > $BUILD_DIR/runtime.txt
+        fi
+        if [ "$PYTHON" = 3.6 ]; then
+            echo "python-3.6.0" > $BUILD_DIR/runtime.txt
+        fi
+    fi
+fi
+

vendor/pipstrip

+#!/usr/bin/env python
+
+import sys
+
+req_file = sys.argv[1]
+
+lines = []
+
+with open(req_file, 'r') as f:
+    r = f.readlines()
+    for l in r:
+        lines.append(l.split('--hash')[0])
+
+with open(req_file, 'w') as f:
+    f.write('\n'.join(lines))