From c1bf2cacb509d2377b5f5dd8cd0faa302d0ce56d Mon Sep 17 00:00:00 2001
From: Chandan Singh <csingh43@bloomberg.net>
Date: Sat, 29 Dec 2018 05:02:06 +0000
Subject: WIP: Add Makefile to regenerate frozen requirements files

It can be a bit of hassle to update the requirements files properly as
we need to install the dependencies in a virtual environment and then
capture the output of `pip freeze`.

Provide a simple Makefile that would enable users to run `make
requirements-update` to simplify the above process.
---
 Makefile | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000..2f0afbd83
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,35 @@
+# Makefile for BuildStream
+#
+
+REQUIREMENTS_FILES := requirements.txt dev-requirements.txt plugin-requirements.txt
+PYTHON := python3
+VENV := $(PYTHON) -m venv
+TOX := tox
+
+VENV_PIP = $(VENVDIR)/bin/pip
+
+
+.PHONY: all sdist tests clean requirements-remove requirements-update
+
+all: tests
+
+tests:
+	$(TOX)
+
+sdist:
+	python3 setup.py sdsit
+
+requirements-remove:
+	rm $(REQUIREMENTS_FILES) || true
+
+requirements-update: requirements-remove $(REQUIREMENTS_FILES)
+
+%.txt: %.in
+	$(eval VENVDIR := $(shell mktemp -d $$TMPDIR/bst-venv.XXXXXX))
+	$(VENV) $(VENVDIR)
+	$(VENV_PIP) install -r $^
+	$(VENV_PIP) freeze -r $^ > $@
+	rm -rf $(VENVDIR)
+
+clean:
+	rm -rf __pycache__ tmp .tox
-- 
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