Prepare CI for our internal release train (#828)

* Drone: trigger on weekly release branches

* Update the image-tag to include the branch name on non-tags

* tools/image-tag: use bash

This requires bash to be installed in the alpine/git image

docker run --rm -it --entrypoint /bin/sh alpine/git
/git # bash
/bin/sh: bash: not found
/git # apk --update --no-cache add bash
fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/main/x86_64/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/community/x86_64/APKINDEX.tar.gz
(1/2) Installing readline (8.1.0-r0)
(2/2) Installing bash (5.1.0-r0)
Executing bash-5.1.0-r0.post-install
Executing busybox-1.32.1-r6.trigger
OK: 27 MiB in 33 packages
/git # ^C

* Add CHANGELOG entry

.drone/drone.yml

@@ -11,6 +11,7 @@ steps:
 - name: image-tag
   image: alpine/git
   commands:
+  - apk --update --no-cache add bash
   - git fetch origin --tags
   - echo $(./tools/image-tag) > .tags
 
@@ -36,6 +37,8 @@ trigger:
   ref:
   - refs/heads/main
   - refs/tags/**
+  - refs/heads/r? # For weekly release
+  - refs/heads/r?? # For weekly release
 
 ---
 ##  AMD64  ##
@@ -50,6 +53,7 @@ steps:
 - name: image-tag
   image: alpine/git
   commands:
+  - apk --update --no-cache add bash
   - git fetch origin --tags
   - echo $(./tools/image-tag)-amd64 > .tags
 
@@ -90,6 +94,8 @@ trigger:
   ref:
   - refs/heads/main
   - refs/tags/v*
+  - refs/heads/r? # For weekly release
+  - refs/heads/r?? # For weekly release
 
 ---
 ##  ARM64  ##
@@ -104,6 +110,7 @@ steps:
 - name: image-tag
   image: alpine/git
   commands:
+  - apk --update --no-cache add bash
   - git fetch origin --tags
   - echo $(./tools/image-tag)-arm64 > .tags
 
@@ -144,6 +151,8 @@ trigger:
   ref:
   - refs/heads/main
   - refs/tags/v*
+  - refs/heads/r? # For weekly release
+  - refs/heads/r?? # For weekly release
 
 ---
 ##  MANIFEST  ##
@@ -158,6 +167,7 @@ steps:
 - name: image-tag
   image: alpine/git
   commands:
+  - apk --update --no-cache add bash
   - git fetch origin --tags
   - echo $(./tools/image-tag) > .tags
 
@@ -189,6 +199,8 @@ trigger:
   ref:
   - refs/heads/main
   - refs/tags/v*
+  - refs/heads/r? # For weekly release
+  - refs/heads/r?? # For weekly release
 
 ---
 kind: secret

CHANGELOG.md

@@ -14,6 +14,7 @@
 * [ENHANCEMENT] Add `-config.expand-env` cli flag to support environment variables expansion in config file. [#796](https://github.com/grafana/tempo/pull/796) (@Ashmita152)
 * [ENHANCEMENT] Emit traces for ingester flush operations. [#812](https://github.com/grafana/tempo/pull/812) (@bboreham)
 * [ENHANCEMENT] Add retry middleware in query-frontend. [#814](https://github.com/grafana/tempo/pull/814) (@kvrhdn)
+* [CHANGE] Docker images are now prefixed by their branch name [#828](https://github.com/grafana/tempo/pull/828) (@jvrplmlmn)
 
 ## v1.0.1
 

tools/image-tag

@@ -1,15 +1,21 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
 set -o errexit
 set -o nounset
+set -o pipefail
 
-SHA="$(git rev-parse --short HEAD)"
+WIP=$(git diff --quiet || echo '-WIP')
+BRANCH=$(git rev-parse --abbrev-ref HEAD | sed 's#/#-#g')
+# When 7 chars are not enough to be unique, git automatically uses more.
+# We are forcing to 7 here, as we are doing for grafana/grafana as well.
+SHA=$(git rev-parse --short=7 HEAD | head -c7)
+
+# If not a tag, use branch-hash else use tag
+TAG=$((git describe --exact-match 2> /dev/null || echo "") | sed 's/v//g')
 
-# If tag, use tag
-TAG=$( (git describe --exact-match 2> /dev/null || echo "") | sed 's/v//g')
 if [ -z "$TAG" ]
 then
-      echo ${SHA}
+      echo ${BRANCH}-${SHA}${WIP}
 else
       echo ${TAG}
 fi