Merge pull request cesanta#110 from cesanta/version

Version-tag builds

auth_server/.gitignore

@@ -1,3 +1,4 @@
 ca-certificates.crt
 auth_server
 Godeps/
+version.*

auth_server/Makefile

@@ -2,6 +2,7 @@ MAKEFLAGS += --warn-undefined-variables
 IMAGE ?= cesanta/docker_auth
 COMPRESS_BINARY ?= false
 CA_BUNDLE = /etc/ssl/certs/ca-certificates.crt
+VERSION = $(shell cat version.txt)
 
 BUILDER_IMAGE ?= centurylink/golang-builder
 BUILDER_IMAGE_EXTRA-build-cross = -cross
@@ -15,24 +16,31 @@ local: build-local
 
 update-deps:
 	go get -v -u -f github.com/tools/godep github.com/jteeuwen/go-bindata/...
+	go generate ./...
 
 godep:
 	godep save
 
 build-local: update-deps
-	go generate ./...
 	go build
 
 ca-certificates.crt:
 	cp $(CA_BUNDLE) .
 
 docker-build:
 	docker run --rm -v $(PWD):/src -e COMPRESS_BINARY=$(COMPRESS_BINARY) $(BUILDER_OPTS-$@) $(BUILDER_IMAGE)$(BUILDER_IMAGE_EXTRA-$@) $(IMAGE)
+	@echo === Built version $(VERSION) ===
 
 build build-cross: update-deps godep ca-certificates.crt docker-build
 
+docker-tag:
+	docker tag $(IMAGE):latest $(IMAGE):$(VERSION)
+
 docker-tag-%:
-	docker tag -f $(IMAGE):latest $(IMAGE):$*
+	docker tag $(IMAGE):latest $(IMAGE):$*
+
+docker-push:
+	docker push $(IMAGE):latest $(IMAGE):$(VERSION)
 
 docker-push-%: docker-tag-%
 	docker push $(IMAGE):$*

auth_server/gen_version.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+
+import datetime
+import sys
+
+# Debian/Ubuntu: apt-get install python-git
+# PIP: pip install GitPython
+import git
+
+repo = git.Repo('.', search_parent_directories=True)
+
+
+def get_tag_for_commit(repo, commit):
+    for tag in repo.tags:
+        if tag.commit == commit:
+            return tag.name
+    return None
+
+
+if repo.head.is_detached:
+    branch_or_tag = get_tag_for_commit(repo, repo.head.commit)
+    if branch_or_tag is None:
+        branch_or_tag = '?'
+else:
+    branch_or_tag = repo.active_branch
+
+dirty = repo.is_dirty()
+
+ts = datetime.datetime.utcnow()
+build_id = '%s/%s@%s%s' % (ts.strftime('%Y%m%d-%H%M%S'),
+                           branch_or_tag,
+                           str(repo.head.commit)[:8],
+                           '+' if dirty else '')
+
+version = None
+if not dirty:
+    version = get_tag_for_commit(repo, repo.head.commit)
+if version is None:
+    version = ts.strftime('%Y%m%d%H%M%S')
+
+
+if len(sys.argv) == 1 or sys.argv[1] == '-':
+    f = sys.stdout
+else:
+    f = open(sys.argv[1], 'w')
+
+with open('version.go', 'w') as f:
+    f.write("""\
+package main
+
+const (
+\tVersion = "{version}"
+\tBuildId = "{build_id}"
+)
+""".format(version=version, build_id=build_id))
+
+with open('version.txt', 'w') as f:
+    f.write(version)
+
+f.close()

auth_server/main.go

@@ -14,6 +14,8 @@
    limitations under the License.
 */
 
+//go:generate ./gen_version.py
+
 package main // import "github.com/cesanta/docker_auth/auth_server"
 
 import (
@@ -158,6 +160,8 @@ func main() {
 	rand.Seed(time.Now().UnixNano())
 	glog.CopyStandardLogTo("INFO")
 
+	glog.Infof("docker_auth %s build %s", Version, BuildId)
+
 	cf := flag.Arg(0)
 	if cf == "" {
 		glog.Exitf("Config file not specified")