Pipenv development dependencies (ci) (#633)

* initial stab at pipenv --dev support

* test installation output

* locale fix

* refactor

* fix typo

* fix typo

* ellipsis

* polish

CHANGELOG.md

 # Python Buildpack Changelog
 
+# 124
+
+Update buildpack to automatically install [dev-packages] (Pipenv) during Heroku CI builds.
+
 # 123
 
 Update gunicorn init.d script to allow overrides.

README.md

@@ -23,7 +23,7 @@ Deploying a Python application couldn't be easier:
     $ git push heroku master
     …
     -----> Python app detected
-    -----> Installing python-3.6.3
+    -----> Installing python-3.6.4
     -----> Installing pip
     -----> Installing requirements with latest pipenv…
            ...
@@ -58,7 +58,7 @@ Or, more specifically:
 
 Runtime options include:
 
-- `python-3.6.3`
+- `python-3.6.4`
 - `python-2.7.14`
 - `pypy-5.7.1` (unsupported, experimental)
 - `pypy3-5.5.1` (unsupported, experimental)

bin/steps/pip-install

@@ -29,4 +29,12 @@ if [ ! "$SKIP_PIP_INSTALL" ]; then
     /app/.heroku/python/bin/pip freeze --disable-pip-version-check > .heroku/python/requirements-installed.txt
 
     echo
+    
+    # Install test dependencies, for CI. 
+    if [ "$INSTALL_TEST" ]; then
+        if [[ -f "$1/requirements-test.txt" ]]; then
+            puts-step "Installing test dependencies…"
+            /app/.heroku/python/bin/pip install -r "$1/requirements-test.txt" --exists-action=w --src=./.heroku/src --disable-pip-version-check --no-cache-dir 2>&1 | cleanup | indent
+        fi
+    fi
 fi

bin/steps/pipenv

@@ -16,13 +16,18 @@ if [[ -f Pipfile ]]; then
         # Install pipenv.
         /app/.heroku/python/bin/pip install pipenv --upgrade &> /dev/null
 
+        # Install the dependencies.
         if [[ ! -f Pipfile.lock ]]; then
             /app/.heroku/python/bin/pipenv install --system --skip-lock 2>&1 | indent
         else
             /app/.heroku/python/bin/pipenv install --system --deploy 2>&1 | indent
         fi
-        # Install the dependencies.
 
+        # Install the test dependencies, for CI.
+        if [ "$INSTALL_TEST" ]; then
+            puts-step "Installing test dependencies…"
+            /app/.heroku/python/bin/pipenv install --dev --system --deploy 2>&1 | cleanup | indent
+        fi
 
         # Skip pip install, later.
         export SKIP_PIP_INSTALL=1

bin/test-compile

@@ -6,8 +6,8 @@ BIN_DIR=$(cd "$(dirname "$0")" || return; pwd) # absolute path
 # shellcheck source=bin/utils
 source "$BIN_DIR/utils"
 
-DISABLE_COLLECTSTATIC=1 "$(dirname "${0:-}")/compile" "$1" "$2" "$3"
+# Locale support for Pipenv.
+export LC_ALL=C.UTF-8
+export LANG=C.UTF-8
 
-if [[ -f "$1/requirements-test.txt" ]]; then
-    /app/.heroku/python/bin/pip install -r "$1/requirements-test.txt" --exists-action=w --src=./.heroku/src --disable-pip-version-check --no-cache-dir 2>&1 | cleanup | indent
-fi
+DISABLE_COLLECTSTATIC=1 INSTALL_TEST=1 "$(dirname "${0:-}")/compile" "$1" "$2" "$3"
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