new pylibmc test (#408)

* silently use sp-grep

* history

* update license

.dockerignore

@@ -0,0 +1 @@
+.git/

CHANGELOG.md

@@ -1,5 +1,49 @@
 # Python Buildpack Changelog
 
+# 109
+
+Fix output for collectstatic step.
+
+# 108
+
+Updated setuptools.
+
+# 107
+
+Bugfix for C dependency installation.
+
+# 106
+
+ Don't install packages that could mess up packaging.
+
+ - The Python buildpack will automatically remove `six`, `pyparsing`, `appdirs`,
+   `setuptools`, and `distribute` from a `requirements.txt` file now, as these
+   packages are provided by the Python buildpack.
+
+ # 105
+
+ Improvements to output messaging.
+
+# 104
+
+General improvements.
+
+- Fix for Heroku CI.
+- Use `pkg_resources` to check if a distribution is installed instead of
+  parsing `requirements.txt`. ([#395][395])
+
+[395]: https://github.com/heroku/heroku-buildpack-python/pull/395
+
+## 103
+
+Bug fixes and improvements.
+
+- Fix for Pipenv.
+- Fix for Heroku CI.
+- Improve handling of WEB_CONCURRENCY when using multiple buildpacks.
+- Adjust environment variables set during the build to more closely match those in the dyno environment (DYNO is now available, STACK is not).
+- Restore the build cache prior to running bin/pre_compile.
+
 ## 102
 
 Buildpack code cleanup.

Dockerfile

@@ -1,11 +1,13 @@
 FROM heroku/heroku:16-build
 
 WORKDIR /app
-ENV WORKSPACE_DIR=/app/builds
+ENV WORKSPACE_DIR="/app/builds" \
+    S3_BUCKET="lang-python" \
+    S3_PREFIX="heroku-16/"
 
-RUN apt-get update && apt-get install -y python-pip
+RUN apt-get update && apt-get install -y python-pip && rm -rf /var/lib/apt/lists/*
 
-# Install bob-builder application
-RUN pip install bob-builder==0.0.5
+COPY requirements.txt /app/
+RUN pip install --disable-pip-version-check --no-cache-dir -r /app/requirements.txt
 
-COPY . /app
+COPY . /app

LICENSE

@@ -1,6 +1,6 @@
 MIT License:
 
-Copyright (C) 2016 Heroku, Inc.
+Copyright (C) 2017 Heroku, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

Makefile

@@ -13,7 +13,20 @@ test-heroku-16:
 	@docker run -v $(shell pwd):/buildpack:ro --rm -it -e "STACK=heroku-16" heroku/heroku:16-build bash -c 'cp -r /buildpack /buildpack_test; cd /buildpack_test/; test/run;'
 	@echo ""
 
+buildenv-heroku-16:
+	@echo "Creating build environment (heroku-16)..."
+	@echo
+	@docker build --pull -t python-buildenv-heroku-16 .
+	@echo
+	@echo "Usage..."
+	@echo
+	@echo "  $$ export AWS_ACCESS_KEY_ID=foo AWS_SECRET_ACCESS_KEY=bar  # Optional unless deploying"
+	@echo "  $$ bob build runtimes/python-2.7.13"
+	@echo "  $$ bob deploy runtimes/python-2.7.13"
+	@echo
+	@docker run -it --rm python-buildenv-heroku-16
+
 tools:
 	git clone https://github.com/kennethreitz/pip-pop.git
 	mv pip-pop/bin/* vendor/pip-pop/
-	rm -fr pip-pop
+	rm -fr pip-pop

README.md

@@ -8,7 +8,7 @@ This is the official [Heroku buildpack](https://devcenter.heroku.com/articles/bu
 
 Recommended web frameworks include **Django** and **Flask**. The recommended webserver is **Gunicorn**. There are no restrictions around what software can be used (as long as it's pip-installable). Web processes must bind to `$PORT`, and only the HTTP protocol is permitted for incoming connections.
 
-Some Python packages with obscure C dependencies (e.g. scipy) are [not compatible](https://devcenter.heroku.com/articles/python-c-deps). 
+Some Python packages with obscure C dependencies (e.g. scipy) are [not compatible](https://devcenter.heroku.com/articles/python-c-deps).
 
 See it in Action
 ----------------
@@ -29,7 +29,7 @@ Deploying a Python application couldn't be easier:
              Downloading requests-2.12.4-py2.py3-none-any.whl (576KB)
            Installing collected packages: requests
            Successfully installed requests-2.12.4
-           
+
     -----> Discovering process types
            Procfile declares types -> (none)
 
@@ -46,11 +46,11 @@ Specify a Python Runtime
 Specific versions of the Python runtime can be specified with a `runtime.txt` file:
 
     $ cat runtime.txt
-    python-3.6.0
+    python-3.6.1
 
 Runtime options include:
 
 - `python-2.7.13`
-- `python-3.6.0`
-- `pypy-5.6.0` (unsupported, experimental)
-- `pypy3-5.5.0` (unsupported, experimental)
+- `python-3.6.1`
+- `pypy-5.7.1` (unsupported, experimental)
+- `pypy3-5.5.1` (unsupported, experimental)

bin/compile

@@ -15,6 +15,10 @@
 # Fail fast and fail hard.
 set -eo pipefail
 
+# Standard Library.
+export BPLOG_PREFIX="buildpack.python"
+export BUILDPACK_LOG_FILE=${BUILDPACK_LOG_FILE:-/dev/null}
+
 [ "$BUILDPACK_XTRACE" ] && set -o xtrace
 
 # Prepend proper path for virtualenv hackery. This will be deprecated soon.
@@ -32,7 +36,6 @@ DEFAULT_PYTHON_VERSION="python-2.7.13"
 DEFAULT_PYTHON_STACK="cedar-14"
 PYTHON_EXE="/app/.heroku/python/bin/python"
 PIP_VERSION="9.0.1"
-SETUPTOOLS_VERSION="32.1.0"
 
 # Common Problem Warnings
 export WARNINGS_LOG=$(mktemp)
@@ -48,7 +51,7 @@ export PATH=$PATH:$ROOT_DIR/vendor/:$ROOT_DIR/vendor/pip-pop
 
 # Sanitizing environment variables.
 unset GIT_DIR PYTHONHOME PYTHONPATH
-unset RECEIVE_DATA RUN_KEY BUILD_INFO DEPLOY LOG_TOKEN DYNO
+unset RECEIVE_DATA RUN_KEY BUILD_INFO DEPLOY LOG_TOKEN
 unset CYTOKINE_LOG_FILE GEM_PATH
 
 # Syntax sugar.
@@ -64,6 +67,7 @@ mkdir -p /app/.heroku
 PROFILE_PATH="$BUILD_DIR/.profile.d/python.sh"
 EXPORT_PATH="$BIN_DIR/../export"
 GUNICORN_PROFILE_PATH="$BUILD_DIR/.profile.d/python.gunicorn.sh"
+WEB_CONCURRENCY_PROFILE_PATH="$BUILD_DIR/.profile.d/WEB_CONCURRENCY.sh"
 
 # We'll need to send these statics to other scripts we `source`.
 export BUILD_DIR CACHE_DIR BIN_DIR PROFILE_PATH EXPORT_PATH
@@ -87,6 +91,20 @@ if [[ ! -f Procfile ]]; then
   puts-warn 'Learn more: https://devcenter.heroku.com/articles/procfile'
 fi
 
+# Prepare the cache.
+mkdir -p $CACHE_DIR
+
+# Restore old artifacts from the cache.
+mkdir -p .heroku
+
+cp -R $CACHE_DIR/.heroku/python .heroku/ &> /dev/null || true
+cp -R $CACHE_DIR/.heroku/python-stack .heroku/ &> /dev/null || true
+cp -R $CACHE_DIR/.heroku/python-version .heroku/ &> /dev/null || true
+cp -R $CACHE_DIR/.heroku/vendor .heroku/ &> /dev/null || true
+if [[ -d $CACHE_DIR/.heroku/src ]]; then
+  cp -R $CACHE_DIR/.heroku/src .heroku/ &> /dev/null || true
+fi
+
 # Experimental pre_compile hook.
 source $BIN_DIR/steps/hooks/pre_compile
 
@@ -110,21 +128,6 @@ if [ ! -f runtime.txt ]; then
   echo $DEFAULT_PYTHON_VERSION > runtime.txt
 fi
 
-# Prepare the cache.
-mkdir -p $CACHE_DIR
-
-# Restore old artifacts from the cache.
-mkdir -p .heroku
-
-cp -R $CACHE_DIR/.heroku/python .heroku/ &> /dev/null || true
-cp -R $CACHE_DIR/.heroku/python-stack .heroku/ &> /dev/null || true
-cp -R $CACHE_DIR/.heroku/python-version .heroku/ &> /dev/null || true
-cp -R $CACHE_DIR/.heroku/vendor .heroku/ &> /dev/null || true
-if [[ -d $CACHE_DIR/.heroku/src ]]; then
-  cp -R $CACHE_DIR/.heroku/src .heroku/ &> /dev/null || true
-fi
-
-
 mkdir -p $(dirname $PROFILE_PATH)
 mkdir -p /app/.heroku/src
 
@@ -137,10 +140,9 @@ if [[ $BUILD_DIR != '/app' ]]; then
 fi
 
 # Install Python.
+let start=$(nowms)
 source $BIN_DIR/steps/python
-
-# Sanity check for setuptools/distribute.
-source $BIN_DIR/steps/setuptools
+mtime "python.install.time" "${start}"
 
 # Pipenv support.
 source $BIN_DIR/steps/pipenv
@@ -169,20 +171,32 @@ sub-env $BIN_DIR/steps/geo-libs
 source $BIN_DIR/steps/gdal
 
 # Install dependencies with Pip (where the magic happens).
+let start=$(nowms)
 source $BIN_DIR/steps/pip-install
+mtime "pip.install.time" "${start}"
 
 # Uninstall removed dependencies with Pip.
+let start=$(nowms)
 source $BIN_DIR/steps/pip-uninstall
+mtime "pip.uninstall.time" "${start}"
 
 # Support for NLTK corpora.
+let start=$(nowms)
 sub-env $BIN_DIR/steps/nltk
+mtime "nltk.download.time" "${start}"
 
 # Support for pip install -e.
-rm -fr $BUILD_DIR/.heroku/src
-deep-cp /app/.heroku/src $BUILD_DIR/.heroku/src
+# In CI, $BUILD_DIR is /app.
+if [[ ! "$BUILD_DIR" == "/app" ]]; then
+  rm -fr $BUILD_DIR/.heroku/src
+  deep-cp /app/.heroku/src $BUILD_DIR/.heroku/src
+fi
+
 
 # Django collectstatic support.
+let start=$(nowms)
 sub-env $BIN_DIR/steps/collectstatic
+mtime "collectstatic.time" "${start}"
 
 # Create .profile script for application runtime environment variables.
 set-env PATH '$HOME/.heroku/python/bin:$PATH'
@@ -195,8 +209,10 @@ set-default-env PYTHONHASHSEED random
 set-default-env PYTHONPATH /app/
 
 # Install sane-default script for $WEB_CONCURRENCY and $FORWARDED_ALLOW_IPS.
+cp $ROOT_DIR/vendor/WEB_CONCURRENCY.sh $WEB_CONCURRENCY_PROFILE_PATH
 cp $ROOT_DIR/vendor/python.gunicorn.sh $GUNICORN_PROFILE_PATH
 
+
 # Experimental post_compile hook.
 source $BIN_DIR/steps/hooks/post_compile
 
@@ -219,3 +235,6 @@ cp -R .heroku/vendor $CACHE_DIR/.heroku/ &> /dev/null || true
 if [[ -d .heroku/src ]]; then
   cp -R .heroku/src $CACHE_DIR/.heroku/ &> /dev/null || true
 fi
+
+# Measure the size of the Python installation.
+mmeasure 'python.size' "$(measure-size)"

bin/steps/collectstatic

@@ -20,13 +20,13 @@ MANAGE_FILE=${MANAGE_FILE:-fakepath}
 [ -f .heroku/collectstatic_disabled ] && DISABLE_COLLECTSTATIC=1
 
 # Ensure that Django is explicitly specified in requirements.txt
-pip-grep -s requirements.txt django Django && DJANGO_INSTALLED=1
+sp-grep -s django && DJANGO_INSTALLED=1
 
 
 if [ ! "$DISABLE_COLLECTSTATIC" ] && [ -f "$MANAGE_FILE" ] && [ "$DJANGO_INSTALLED" ]; then
     set +e
 
-    puts-cmd "python $MANAGE_FILE collectstatic --noinput"
+    puts-step "$ python $MANAGE_FILE collectstatic --noinput"
 
     # Run collectstatic, cleanup some of the noisy output.
     python $MANAGE_FILE collectstatic --noinput --traceback 2>&1 | sed '/^Post-processed/d;/^Copying/d;/^$/d' | indent

bin/steps/pip-install

@@ -1,20 +1,23 @@
-# Install dependencies with Pip.
-puts-step "Installing requirements with pip"
+if [ ! "$SKIP_PIP_INSTALL" ]; then
 
-set +e
-/app/.heroku/python/bin/pip install -r $BUILD_DIR/requirements.txt --exists-action=w --src=/app/.heroku/src --disable-pip-version-check --no-cache-dir 2>&1 | tee $WARNINGS_LOG | cleanup | indent
-PIP_STATUS="${PIPESTATUS[0]}"
-set -e
+    # Install dependencies with Pip.
+    puts-step "Installing requirements with pip"
 
-show-warnings
+    set +e
+    /app/.heroku/python/bin/pip install -r $BUILD_DIR/requirements.txt --exists-action=w --src=/app/.heroku/src --disable-pip-version-check --no-cache-dir 2>&1 | tee $WARNINGS_LOG | cleanup | indent
+    PIP_STATUS="${PIPESTATUS[0]}"
+    set -e
 
-if [[ ! $PIP_STATUS -eq 0 ]]; then
-    exit 1
-fi
+    show-warnings
+
+    if [[ ! $PIP_STATUS -eq 0 ]]; then
+        exit 1
+    fi
 
 
-# Smart Requirements handling
-cp requirements.txt .heroku/python/requirements-declared.txt
-/app/.heroku/python/bin/pip freeze --disable-pip-version-check > .heroku/python/requirements-installed.txt
+    # Smart Requirements handling
+    cp requirements.txt .heroku/python/requirements-declared.txt
+    /app/.heroku/python/bin/pip freeze --disable-pip-version-check > .heroku/python/requirements-installed.txt
 
-echo
+    echo
+fi

bin/steps/pipenv

@@ -1,10 +1,19 @@
 # Pipenv support (Generate requriements.txt with pipenv).
 if [[ -f Pipfile ]]; then
     if [[ ! -f requirements.txt ]]; then
-        puts-step "Generating 'requirements.txt' with pipenv"
+        puts-step "Installing requirements with latest pipenv..."
 
+        # Install pipenv.
         /app/.heroku/python/bin/pip install pipenv --upgrade &> /dev/null
 
-        /app/.heroku/python/bin/pipenv lock --requirements --no-hashes > $BUILD_DIR/requirements.txt 2> /dev/null
+        # Install the dependencies.
+        /app/.heroku/python/bin/pipenv install --system 2>&1 | indent
+
+        # Skip pip install, later.
+        export SKIP_PIP_INSTALL=1
+
+        # Pip freeze, for compatibility.
+        /app/.heroku/python/bin/pip freeze > requirements.txt
+
     fi
 fi

bin/steps/python

@@ -25,6 +25,8 @@ if [ ! "$SKIP_INSTALL" ]; then
     mkdir -p .heroku/python
 
     curl https://lang-python.s3.amazonaws.com/$STACK/runtimes/$PYTHON_VERSION.tar.gz -s | tar zxv -C .heroku/python &> /dev/null
+    mcount "version.python.$PYTHON_VERSION"
+
     if [[ $? != 0 ]] ; then
       puts-warn "Requested runtime ($PYTHON_VERSION) is not available for this stack ($STACK)."
       puts-warn "Aborting.  More info: https://devcenter.heroku.com/articles/python-support"

bin/steps/setuptools

@@ -1,11 +0,0 @@
-#!/usr/bin/env bash
-
-# Syntax sugar.
-source $BIN_DIR/utils
-
-if (pip-grep -s requirements.txt setuptools distribute &> /dev/null) then
-
-  puts-warn 'The package setuptools/distribute is listed in requirements.txt.'
-  puts-warn 'Please remove to ensure expected behavior. '
-
-fi

bin/utils

@@ -1,5 +1,12 @@
+#!/usr/bin/env bash
 shopt -s extglob
 
+# The standard library.
+if [[ ! -f  /tmp/stdlib.sh ]]; then
+  curl --retry 3 -s https://lang-common.s3.amazonaws.com/buildpack-stdlib/v2/stdlib.sh > /tmp/stdlib.sh
+fi
+source /tmp/stdlib.sh
+
 if [ $(uname) == Darwin ]; then
     sed() { command sed -l "$@"; }
 else
@@ -11,16 +18,12 @@ indent() {
   sed "s/^/       /"
 }
 
+
 # Clean up pip output
 cleanup() {
   sed -e 's/\.\.\.\+/.../g' | sed -e '/already satisfied/Id' | sed -e '/No files were found to uninstall/Id' | sed -e '/Overwriting/Id' | sed -e '/python executable/Id' | sed -e '/no previously-included files/Id'
 }
 
-# Buildpack Indented line.
-puts-line() {
-  echo "       $@"
-}
-
 # Buildpack Steps.
 puts-step() {
   echo "-----> $@"
@@ -31,28 +34,6 @@ puts-warn() {
   echo " !     $@"
 }
 
-# Buildpack Commands.
-puts-cmd() {
-  echo "     $ $@"
-}
-
-# Usage: $ set-env key value
-set-env() {
-  echo "export $1=$2" >> $PROFILE_PATH
-  echo "export $1=$2" >> $EXPORT_PATH
-}
-
-# Usage: $ set-default-env key value
-set-default-env() {
-  echo "export $1=\${$1:-$2}" >> $PROFILE_PATH
-  echo "export $1=\${$1:-$2}" >> $EXPORT_PATH
-}
-
-# Usage: $ un-set-env key
-un-set-env() {
-  echo "unset $1" >> $PROFILE_PATH
-}
-
 # Does some serious copying.
 deep-cp() {
   declare source="$1" target="$2"
@@ -69,26 +50,11 @@ deep-cp() {
   )
 }
 
-# Does some serious moving.
-deep-mv() {
-  deep-cp "$1" "$2"
-  deep-rm "$1"
-}
-
-# Does some serious deleting.
-deep-rm() {
-  # subshell to avoid surprising caller with shopts.
-  (
-    shopt -s dotglob
-    rm -rf "$1"/!(.curlrc|.netrc|tmp|.|..)
-  )
-}
-
 
 sub-env() {
 
   WHITELIST=${2:-''}
-  BLACKLIST=${3:-'^(GIT_DIR|PYTHONHOME|LD_LIBRARY_PATH|LIBRARY_PATH|PATH)$'}
+  BLACKLIST=${3:-'^(GIT_DIR|STACK|PYTHONHOME|LD_LIBRARY_PATH|LIBRARY_PATH|PATH)$'}
 
   # Python-specific variables.
   export PYHONHOME=$BUILD_DIR/.heroku/python
@@ -108,3 +74,8 @@ sub-env() {
   )
 }
 
+# Measure the size of the Python installation.
+measure-size() {
+  echo "$((du -s .heroku/python 2>/dev/null || echo 0) | awk '{print $1}')"
+}
+

bin/warnings

@@ -7,6 +7,7 @@ old-platform() {
     puts-warn "This caused the security warning you saw above during the 'pip install' step."
     puts-warn "We recommend '$RECOMMENDED_PYTHON_VERSION', which you can specify in a 'runtime.txt' file."
     puts-warn "  -- Much Love, Heroku."
+    mcount 'warnings.python.old'
   fi
 }
 
@@ -16,6 +17,7 @@ pylibmc-missing() {
     puts-warn "Hello! There was a problem with your build related to libmemcache."
     puts-warn "The Python library 'pylibmc' must be explicitly specified in 'requirements.txt' in order to build correctly."
     puts-warn "Once you do that, everything should work as expected.   -- Much Love, Heroku."
+    mcount 'warnings.libmemcache'
   fi
 }
 
@@ -27,6 +29,7 @@ scipy-included() {
     puts-warn "There is, however, a buildpack available that makes it possible to use it on Heroku."
     puts-warn "You can learn more here:  https://devcenter.heroku.com/articles/python-c-deps"
     puts-warn "Sorry for the inconvenience.   -- Much Love, Heroku."
+    mcount 'warnings.scipy'
   fi
 }
 
@@ -37,6 +40,18 @@ distribute-included() {
     puts-warn "This library is automatically installed by Heroku and shouldn't be in"
     puts-warn "Your requirements.txt file. This can cause unexpected behavior."
     puts-warn "  -- Much Love, Heroku."
+    mcount 'warnings.distribute'
+  fi
+}
+
+six-included() {
+  if grep -qi 'Running setup.py install for six' "$WARNINGS_LOG"; then
+    echo
+    puts-warn "Hello! Your requirements.txt file contains the six package."
+    puts-warn "This library is automatically installed by Heroku and shouldn't be in"
+    puts-warn "Your requirements.txt file. This can cause unexpected behavior."
+    puts-warn "  -- Much Love, Heroku."
+    mcount 'warnings.six'
   fi
 }
 
@@ -45,5 +60,6 @@ show-warnings() {
   pylibmc-missing
   scipy-included
   distribute-included
+  six-included
 }
 

builds/README.md

@@ -1,5 +1,7 @@
 # Python Buildpack Binaries
 
+For Cedar-14 stack
+------------------
 
 To get started with it, create an app on Heroku inside a clone of this repository, and set your S3 config vars:
 
@@ -28,4 +30,12 @@ If this works, run `bob deploy` instead of `bob build` to have the result upload
 
 To speed things up drastically, it'll usually be a good idea to `heroku run bash --size PX` instead.
 
-Enjoy :)
+For Heroku-16 stack
+-------------------
+
+1. Ensure GNU Make and Docker are installed.
+2. From the root of the buildpack repository, run: `make buildenv-heroku-16`
+3. Follow the instructions displayed!
+
+
+Enjoy :)

builds/runtimes/pypy-5.7.0

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+# NOTICE: This formula only works for the cedar-14 and heroku-16 stacks, not cedar.
+
+OUT_PREFIX=$1
+
+echo "Building PyPy..."
+SOURCE_TARBALL='https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.7.0-linux64.tar.bz2'
+curl -L $SOURCE_TARBALL | tar jx
+cp -R pypy2-v5.7.0-linux64/* $OUT_PREFIX
+
+ln $OUT_PREFIX/bin/pypy $OUT_PREFIX/bin/python

builds/runtimes/pypy-5.7.1

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+# NOTICE: This formula only works for the cedar-14 stack, not cedar.
+
+OUT_PREFIX=$1
+
+echo "Building PyPy..."
+SOURCE_TARBALL='https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.7.1-linux64.tar.bz2'
+curl -L $SOURCE_TARBALL | tar jx
+cp -R pypy2-v5.7.1-linux64/* $OUT_PREFIX
+
+ln $OUT_PREFIX/bin/pypy $OUT_PREFIX/bin/python

builds/runtimes/pypy3-5.7.1

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+OUT_PREFIX=$1
+
+echo "Building PyPy..."
+SOURCE_TARBALL='https://bitbucket.org/pypy/pypy/downloads/pypy3-v5.7.1-linux64.tar.bz2'
+curl -L $SOURCE_TARBALL | tar jx
+cp -R pypy3-v5.7.1-linux64/* $OUT_PREFIX
+
+ln $OUT_PREFIX/bin/pypy3 $OUT_PREFIX/bin/python

builds/runtimes/python-3.5.3

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+OUT_PREFIX=$1
+
+echo "Building Python..."
+SOURCE_TARBALL='https://python.org/ftp/python/3.5.3/Python-3.5.3.tgz'
+curl -L $SOURCE_TARBALL | tar xz
+mv Python-3.5.3 src
+cd src
+
+./configure --prefix=$OUT_PREFIX --with-ensurepip=no
+make
+make install
+
+# ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+

builds/runtimes/python-3.6.1

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+OUT_PREFIX=$1
+
+echo "Building Python..."
+SOURCE_TARBALL='https://python.org/ftp/python/3.6.1/Python-3.6.1.tgz'
+curl -L $SOURCE_TARBALL | tar xz
+mv Python-3.6.1 src
+cd src
+
+./configure --prefix=$OUT_PREFIX --with-ensurepip=no
+make
+make install
+
+ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+

requirements.txt

@@ -1 +1 @@
-bob-builder==0.0.5
+bob-builder==0.0.13

test/fixtures/pylibmc/requirements.txt

@@ -0,0 +1 @@
+pylibmc

test/run

@@ -44,6 +44,12 @@ testPsycopg2() {
   assertCapturedSuccess
 }
 
+testPylibmc() {
+  compile "pylibmc"
+  assertCaptured "pylibmc"
+  assertCapturedSuccess
+}
+
 testPython2() {
   compile "python2"
   assertCaptured "python-2.7.13"

test/utils

@@ -93,8 +93,14 @@ assertNotCaptured()
 
 assertCapturedSuccess()
 {
-  assertEquals "Expected captured exit code to be 0; was <${RETURN}>" "0" "${RETURN}"
-  assertEquals "Expected STD_ERR to be empty; was <$(cat ${STD_ERR})>" "" "$(cat ${STD_ERR})"
+  assertEquals "Captured exit code -" "0" "${RETURN}"
+  assertEquals "STD_ERR -" "" "$(cat ${STD_ERR})"
+
+  if [ $RETURN -ne 0 -a -z "$(cat ${STD_ERR})" ]; then
+    # Failing exit code but stderr was empty. Display stdout to help debugging.
+    cat $STD_OUT
+    echo
+  fi
 }
 
 # assertCapturedError [[expectedErrorCode] expectedErrorMsg]

vendor/WEB_CONCURRENCY.sh

@@ -0,0 +1,29 @@
+case $(ulimit -u) in
+
+# Automatic configuration for Gunicorn's Workers setting.
+
+# Standard-1X (+Free, +Hobby) Dyno
+256)
+  export DYNO_RAM=512
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-02}
+  ;;
+
+# Standard-2X Dyno
+512)
+  export DYNO_RAM=1024
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-04}
+  ;;
+
+# Performance-M Dyno
+16384)
+  export DYNO_RAM=2560
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-08}
+  ;;
+
+# Performance-L Dyno
+32768)
+  export DYNO_RAM=6656
+  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-011}
+  ;;
+
+esac

vendor/pip-pop/sp-grep

@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""Usage:
+  sp-grep [-s] <package>...
+
+Options:
+  -h --help     Show this screen.
+"""
+from docopt import docopt
+from pkg_resources import DistributionNotFound, get_distribution
+
+
+def has_any_distribution(names, silent=False):
+    for name in names:
+        try:
+            get_distribution(name)
+        except DistributionNotFound:
+            continue
+
+        if not silent:
+            print('Package {name} found!'.format(name=name))
+
+        exit(0)
+
+    if not silent:
+        print('Not found.')
+
+    exit(1)
+
+
+def main():
+    args = docopt(__doc__, version='sp-grep')
+    has_any_distribution(names=args['<package>'], silent=args['-s'])
+
+
+if __name__ == '__main__':
+    main()

vendor/python.gunicorn.sh

@@ -1,38 +1,2 @@
-if [[ "${WEB_CONCURRENCY:-}" == 0* ]]; then
-  # another buildpack set a default value, with leading zero
-  unset WEB_CONCURRENCY
-fi
-
-case $(ulimit -u) in
-
-# Automatic configuration for Gunicorn's Workers setting.
-# Leading zero padding so a subsequent buildpack can figure out that we set a value, and not the user
-
-# Standard-1X (+Free, +Hobby) Dyno
-256)
-  export DYNO_RAM=512
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-02}
-  ;;
-
-# Standard-2X Dyno
-512)
-  export DYNO_RAM=1024
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-04}
-  ;;
-
-# Performance-M Dyno
-16384)
-  export DYNO_RAM=2560
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-08}
-  ;;
-
-# Performance-L Dyno
-32768)
-  export DYNO_RAM=6656
-  export WEB_CONCURRENCY=${WEB_CONCURRENCY:-011}
-  ;;
-
-esac
-
 # Automatic configuration for Gunicorn's ForwardedAllowIPS setting.
 export FORWARDED_ALLOW_IPS='*'