From b0e3e7d8a55f1fd77625880853c156811ff007dc Mon Sep 17 00:00:00 2001
From: Tyler Cipriani <tcipriani@wikimedia.org>
Date: Thu, 24 May 2018 11:46:02 -0600
Subject: Cross-compile using gox

Reviewers: dduvall, #release-engineering-team

Reviewed By: dduvall, #release-engineering-team

Tags: #release-engineering-team

Differential Revision: https://phabricator.wikimedia.org/D1059
---
 .gitignore      |  1 +
 CONTRIBUTING.md |  9 +++++++++
 Makefile        | 12 +++++++++++-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index c0899c9..483f344 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /bin
 /blubber
 /blubber.git
+/_release
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8e08cc1..d9c2d8f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,6 +25,8 @@ to both users inside and outside of WMF and our communities.
  4. An account at [phabricator.wikimedia.org](https://phabricator.wikimedia.org)
     * See our [help article](https://www.mediawiki.org/wiki/Phabricator/Help)
       for setup instructions.
+ 5. (optional) `gox` is used for cross-compiling binary releases. To
+    install `gox` use `go get github.com/mitchellh/gox`.
 
 ## Get the source
 
@@ -92,3 +94,10 @@ Use `arc diff` to submit your changes to Differential.
 
 Once your changes have been accepted, run `arc land` on your local branch to
 merge/push the commit and close the diff.
+
+## Releases
+
+The `release` target of the `Makefile` in this repository uses `gox` to
+cross-compile binary releases of Blubber.
+
+    make release
diff --git a/Makefile b/Makefile
index cb06b90..9a73549 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,6 @@
+RELEASE_DIR ?= ./_release
+TARGETS ?= darwin/amd64 linux/amd64 linux/386 linux/arm linux/arm64 linux/ppc64le windows/amd64 plan9/amd64
+
 PACKAGE := phabricator.wikimedia.org/source/blubber
 
 GO_LDFLAGS := \
@@ -7,4 +10,11 @@ GO_LDFLAGS := \
 install:
 	go install -v -ldflags "$(GO_LDFLAGS)"
 
-.PHONY: install
+release:
+	gox -output="$(RELEASE_DIR)/{{.OS}}-{{.Arch}}/{{.Dir}}" -osarch='$(TARGETS)' -ldflags '$(GO_LDFLAGS)' $(PACKAGE)
+	cp LICENSE "$(RELEASE_DIR)"
+	for f in "$(RELEASE_DIR)"/*/blubber; do \
+		shasum -a 256 "$${f}" | awk '{print $$1}' > "$${f}.sha256"; \
+	done
+
+.PHONY: install release
-- 
cgit v1.2.1