Support RPM builds for those who want them.

Makefile

@@ -1,7 +1,13 @@
 # This Makefile also tricks Travis into not running 'go get' for our
 # build. See http://docs.travis-ci.com/user/languages/go/
 
-OBJDIR = ./bin
+OBJDIR ?= ./bin
+DESTDIR ?= /usr/local/bin
+ARCHIVEDIR ?= /tmp
+
+VERSION ?= 1.0.0
+EPOCH ?= 1
+MAINTAINER ?= "Community"
 
 OBJECTS = activity-monitor \
 	admin-revoker \
@@ -15,7 +21,9 @@ OBJECTS = activity-monitor \
 	ocsp-responder
 
 # Build environment variables (referencing core/util.go)
-BUILD_ID = $(shell git symbolic-ref --short HEAD 2>/dev/null) +$(shell git rev-parse --short HEAD)
+COMMIT_ID = $(shell git rev-parse --short HEAD)
+
+BUILD_ID = $(shell git symbolic-ref --short HEAD 2>/dev/null) +$(COMMIT_ID)
 BUILD_ID_VAR = github.com/letsencrypt/boulder/core.BuildID
 
 BUILD_HOST = $(shell whoami)@$(shell hostname)
@@ -45,3 +53,33 @@ $(OBJECTS): pre
 clean:
 	rm -f $(OBJDIR)/*
 	rmdir $(OBJDIR)
+
+# Install to a destination directory. Defaults to /usr/local/, but you can
+# override it with the DESTDIR variable. Example:
+#
+# DESTDIR=~/bin make install
+install:
+	@mkdir -p $(DESTDIR)
+	$(foreach var,$(OBJECTS), install -m 0755 $(OBJDIR)/$(var) $(DESTDIR)/;)
+
+# Produce a tarball of the current commit; you can set the destination in the
+# ARCHIVEDIR variable.
+archive:
+	git archive --output=$(ARCHIVEDIR)/boulder-$(COMMIT_ID).tar.gz \
+		--prefix=boulder-$(COMMIT_ID)/ $(COMMIT_ID)
+
+# Building an RPM requires `fpm` from https://github.com/jordansissel/fpm
+# which you can install with `gem install fpm`.
+# It is recommended that maintainers use environment overrides to specify
+# Version and Epoch, such as:
+#
+# VERSION=0.1.9 EPOCH=52 MAINTAINER="$(whoami)" ARCHIVEDIR=/tmp make build rpm
+rpm:
+	fpm -s dir -t rpm --rpm-digest sha256 --name "boulder" \
+		--license "Mozilla Public License v2.0" --vendor "ISRG" \
+		--url "https://github.com/letsencrypt/boulder" --prefix=/opt/boulder \
+		--version $(VERSION) --iteration $(COMMIT_ID) --epoch $(EPOCH) \
+		--package $(ARCHIVEDIR)/boulder-$(VERSION)-$(COMMIT_ID).x86_64.rpm \
+		--description "Boulder is an ACME-compatible X.509 Certificate Authority" \
+		--depends "libtool-ltdl" --maintainer "$(MAINTAINER)" \
+		test/boulder-config.json $(foreach var,$(OBJECTS), $(OBJDIR)/$(var))