remove pip-accel and make sure commands work if you're in a venv

remove pip-accel - it's not been updated in two years, and pins our
version of pip to a version that is several breaking changes old.

make sure commands work if you're already in a venv - mostly by
checking for presence of $VIRTUAL_ENV, and ensuring we use the correct
pip to install packages. Also clean up the commands a bit.

Makefile

@@ -2,7 +2,6 @@
 SHELL := /bin/bash
 DATE = $(shell date +%Y-%m-%d:%H:%M:%S)
 
-PIP_ACCEL_CACHE ?= ${CURDIR}/cache/pip-accel
 APP_VERSION_FILE = app/version.py
 
 GIT_BRANCH ?= $(shell git symbolic-ref --short HEAD 2> /dev/null || echo "detached")
@@ -34,11 +33,19 @@ help:
 	@cat $(MAKEFILE_LIST) | grep -E '^[a-zA-Z_-]+:.*?## .*$$' | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
 
 .PHONY: venv
+# if there's a virtualenv already active, we don't want to do anything
+ifeq ($(VIRTUAL_ENV),)
 venv: venv/bin/activate ## Create virtualenv if it does not exist
 
 venv/bin/activate:
 	test -d venv || virtualenv venv -p python3
-	. venv/bin/activate && pip install pip-accel
+
+VENV_BIN_DIR = $(shell . venv/bin/activate && echo $$VIRTUAL_ENV/bin)
+else
+venv:
+
+VENV_BIN_DIR = $(VIRTUAL_ENV)/bin
+endif
 
 .PHONY: check-env-vars
 check-env-vars: ## Check mandatory environment variables
@@ -65,10 +72,9 @@ production: ## Set environment to production
 	@true
 
 .PHONY: dependencies
-dependencies: venv ## Install build dependencies
-	mkdir -p ${PIP_ACCEL_CACHE}
-	. venv/bin/activate && make install-pycurl
-	. venv/bin/activate && PIP_ACCEL_CACHE=${PIP_ACCEL_CACHE} pip-accel install -r requirements_for_test.txt
+dependencies: venv
+	$(call install-pycurl, $(VENV_BIN_DIR)/pip)
+	$(VENV_BIN_DIR)/pip install -r requirements_for_test.txt
 
 .PHONY: generate-version-file
 generate-version-file: ## Generates the app version file
@@ -76,7 +82,7 @@ generate-version-file: ## Generates the app version file
 
 .PHONY: build
 build: dependencies generate-version-file ## Build project
-	. venv/bin/activate && PIP_ACCEL_CACHE=${PIP_ACCEL_CACHE} pip-accel install -r requirements.txt
+
 
 .PHONY: build-paas-artifact
 build-paas-artifact:  ## Build the deploy artifact for PaaS
@@ -109,7 +115,7 @@ freeze-requirements:
 
 define install-pycurl
 	# install pycurl separately to avoid flags disabling wheels for other packages
-	PYCURL_SSL_LIBRARY=openssl ${1} install pycurl --global-option="build_ext" --global-option="-I/usr/local/opt/openssl/include"
+	PYCURL_SSL_LIBRARY=openssl ${1} install pycurl==7.43.0.2 --global-option="build_ext" --global-option="-I/usr/local/opt/openssl/include"
 endef
 
 .PHONY: install-pycurl
@@ -125,11 +131,10 @@ test-requirements:
 
 .PHONY: coverage
 coverage: venv ## Create coverage report
-	. venv/bin/activate && coveralls
+	coveralls
 
 .PHONY: prepare-docker-build-image
 prepare-docker-build-image: ## Prepare the Docker builder image
-	mkdir -p ${PIP_ACCEL_CACHE}
 	make -C docker build
 
 .PHONY: build-with-docker
@@ -137,7 +142,6 @@ build-with-docker: prepare-docker-build-image ## Build inside a Docker container
 	@docker run -i${DOCKER_TTY} --rm \
 		--name "${DOCKER_CONTAINER_PREFIX}-build" \
 		-v "`pwd`:/var/project" \
-		-v "${PIP_ACCEL_CACHE}:/var/project/cache/pip-accel" \
 		-e UID=$(shell id -u) \
 		-e GID=$(shell id -g) \
 		-e GIT_COMMIT=${GIT_COMMIT} \

requirements-app.txt

@@ -28,3 +28,5 @@ awscli-cwlogs>=1.4,<1.5
 botocore<1.11.0
 
 git+https://github.com/alphagov/notifications-utils.git@30.4.0#egg=notifications-utils==30.4.0
+
+# if you want to update pycurl please do so in makefile

scripts/bootstrap.sh

@@ -20,17 +20,7 @@ function display_result {
   fi
 }
 
-if [ ! $VIRTUAL_ENV ]; then
-  virtualenv -p python3 ./venv
-  . ./venv/bin/activate
-fi
-
-# we need the version file to exist otherwise the app will blow up
-make generate-version-file
-
-make install-pycurl
-# Install Python development dependencies
-pip3 install -r requirements_for_test.txt
+make build
 
 # Create Postgres databases
 createdb notification_api