Update makefile with repatching scripts

Signed-off-by: Dan Ryan <dan.ryan@canonical.com>

Makefile

@@ -4,13 +4,22 @@ venv_file := $(CURDIR)/.test_venv
 get_venv_path =$(file < $(venv_file))
 # This is how we will build tag-specific wheels, e.g. py36 or py37
 PY_VERSIONS:= 2.7 3.5 3.6 3.7 3.8
+BACKSLASH = '\\'
 # This is how we will build generic wheels, e.g. py2 or py3
 INSTALL_TARGETS := $(addprefix install-py,$(PY_VERSIONS))
 CLEAN_TARGETS := $(addprefix clean-py,$(PY_VERSIONS))
 DATE_STRING := $(shell date +%Y.%m.%d)
 THIS_MONTH_DATE := $(shell date +%Y.%m.01)
 NEXT_MONTH_DATE := $(shell date -d "+1 month" +%Y.%m.01)
-
+PATCHED_PIP_VERSION := $(shell awk '/__version__/{gsub(/"/,"",$$3); print $$3}' pipenv/patched/notpip/__init__.py)
+PATCHED_PIPTOOLS_VERSION := $(shell awk -F "=" '/pip-tools/ {print $$3}' pipenv/patched/patched.txt)
+GITDIR_STAMPFILE := $(CURDIR)/.git-checkout-dir
+create_git_tmpdir = $(shell mktemp -dt pipenv-vendor-XXXXXXXX 2>/dev/null || mktemp -d 2>/dev/null)
+write_git_tmpdir = $(file > $(GITDIR_STAMPFILE),$(create_git_tmpdir))
+get_checkout_dir = $(file < $(GITDIR_STAMPFILE))
+get_checkout_subdir = $(addprefix $(get_checkout_dir), $(1))
+pip-checkout-dir = $(get_checkout_dir)/patch-pip
+piptools-checkout-dir = $(get_checkout_dir)/patch-piptools
 
 format:
 	black pipenv/*.py
@@ -19,10 +28,9 @@ test:
 
 .PHONY: install
 install:
-	pip install -e . && pipenv install --dev
+	pip install -e .
 
-install.stamp:
-	[ ! -e install.stamp ] && $(MAKE) install
+install.stamp: install
 	@touch install.stamp
 
 .PHONY: install-py%
@@ -75,12 +83,8 @@ retest: virtualenv submodules test-install
 	. $(get_venv_path)/bin/activate && pipenv run pytest -ra -k 'test_check_unused or test_install_editable_git_tag or test_get_vcs_refs or test_skip_requirements_when_pipfile or test_editable_vcs_install or test_basic_vcs_install or test_git_vcs_install or test_ssh_vcs_install or test_vcs_can_use_markers' -vvv --full-trace --tb=long
 
 .PHONY: build
-build: install.stamp
-	pipenv run python setup.py sdist bdist_wheel
-
-build.stamp:
-	[ ! -e build.stamp ] && $(MAKE) build
-	@touch build.stamp
+build: install-virtualenvs.stamp install.stamp
+	PIPENV_PYTHON=3.7 pipenv run python setup.py sdist bdist_wheel
 
 .PHONY: update-version
 update-version:
@@ -121,5 +125,56 @@ cleanbuild:
 	@rm -rf build.stamp
 
 .PHONY: clean
-clean: cleanbuild
-	rm -rf install.stamp build.stamp install-virtualenvs.stamp
+clean:
+	rm -rf install.stamp build.stamp install-virtualenvs.stamp .git-checkout-dir
+
+.PHONY: gitclean
+gitclean:
+	@echo "Cleaning up git trees..."
+	@rm -rf $(file < .git-checkout-dir)
+	@echo "Cleaning up git checkout stamp"
+	@rm -rf .git-checkout-dir
+
+.git-checkout-dir:
+	@echo "Creating git repo temp file"
+	@echo "Creating git checkout stamp file at .git-checkout-dir"
+	@echo $(file > $(CURDIR)/.git-checkout-dir,$(shell mktemp -dt pipenv-vendor-XXXXXXXX 2>/dev/null || mktemp -d 2>/dev/null))
+
+.PHONY: clone-pip
+clone-pip: .git-checkout-dir
+	[ -e $(pip-checkout-dir) ] && echo "Pip already exists, moving on!" || git clone https://github.com/pypa/pip.git $(pip-checkout-dir) -b $(PATCHED_PIP_VERSION)
+
+.PHONY: clone-piptools
+clone-piptools: .git-checkout-dir
+	[ -e $(piptools-checkout-dir) ] && echo "Piptools already exists, moving on!" || git clone https://github.com/jazzband/pip-tools.git $(piptools-checkout-dir) -b $(PATCHED_PIPTOOLS_VERSION)
+
+.PHONY: patch-pip
+patch-pip: clone-pip
+	@find $(CURDIR)/tasks/vendoring/patches/patched/ -regex ".*/pip[0-9]+.patch" -exec cp {} $(pip-checkout-dir) \;
+	@sed -i -r 's:([a-b]\/)pipenv/patched/:\1src/:g' $(pip-checkout-dir)/*.patch
+	@find $(CURDIR)/tasks/vendoring/patches/patched/ -regex ".*/_post-pip-[^/\.]*.patch" -exec cp {} $(pip-checkout-dir)/ \;
+	@sed -i -r 's:([a-b]\/)pipenv/patched/not:\1src/:g' $(pip-checkout-dir)/_post-*.patch
+	@cd $(pip-checkout-dir)/ && git apply --ignore-whitespace --verbose pip*.patch
+	@echo "Head to $(pip-checkout-dir) to update the pip patches to the latest version"
+
+.PHONY: patch-piptools
+patch-piptools: clone-piptools
+	@find $(CURDIR)/tasks/vendoring/patches/patched/ -regex ".*/piptools[^/\.]*.patch" -exec cp {} $(piptools-checkout-dir)/ \;
+	@sed -i -r 's:([a-b]\/)pipenv/patched/:\1/:g' $(piptools-checkout-dir)/*.patch
+	@cd $(piptools-checkout-dir)/ && git apply --ignore-whitespace --verbose piptools*.patch
+	@echo "Head to $(piptools-checkout-dir) to update the piptools patches to the latest version"
+
+.PHONY: patches
+patches: patch-pip patch-piptools
+
+.PHONY: reimport-pip-patch
+reimport-pip-patch:
+	@sed -i -r 's:([a-b]\/)src/:\1pipenv/patched/not:g' $(pip-checkout-dir)/_post-*.patch
+	@sed -i -r 's:([a-b]\/)src/:\1pipenv/patched/:g' $(pip-checkout-dir)/pip*.patch
+	@find $(pip-checkout-dir) -maxdepth 1 -regex ".*/pip[0-9]+.patch" -exec cp {} $(CURDIR)/tasks/vendoring/patches/patched/ \;
+	@find $(pip-checkout-dir) -maxdepth 1 -regex ".*/_post-pip-[^/\.]*.patch" -exec cp {} $(CURDIR)/tasks/vendoring/patches/patched/ \;
+
+.PHONY: reimport-piptools-patch
+reimport-piptools-patch:
+	@sed -i -r 's:([a-b]\/):\1pipenv/patched/:g' $(piptools-checkout-dir)/*.patch
+	@find $(piptools-checkout-dir)/ -maxdepth 1 -regex ".*/piptools[^/\.]*.patch" -exec cp {} $(CURDIR)/tasks/vendoring/patches/patched/ \;