grin/doc/release_instruction.md

Grin - Instruction of Release

Note: [totally draft doc! to be reviewed and discussed]

Version Number Rule

In Grin, we're using Semantic Versioning 2.0.0. For a short description of the rule:

A version number include MAJOR.MINOR.PATCH, and increment the:

1. MAJOR version when you make incompatible API changes,
2. MINOR version when you add functionality in a backwards-compatible manner, and
3. PATCH version when you make backwards-compatible bug fixes.

And additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.

The examples of the release version of Grin:

• 0.3.0
• 0.3.1
• 1.5.90

The examples of label of pre-release:

• 1.0.0-alpha.1
• 1.0.0-beta.2
• 1.0.0-test.5

In Grin, build metadata is used as the build number which comes from the Travis-CI job ID of building jobs, it's an unique ID for each building. Note: for the moment, this metadata is only used in the name of the released binary, and it's auto generated, no need to set it manually.

Here is an example of the build metadata of Grin release version:

• 0.3.1-430839304

And as the end of this section, here's an example of the whole encoded version string:

• 0.3.1-pre.1-430839316

Release Files (Binaries)

So far, Grin support both Mac and Linux, and 64bits only. There're 2 binaries in one version release, plus md5 checksum for each binary.

For example:

• grin-0.3.1-pre.1-430839316-oxs.tgz
• grin-0.3.1-pre.1-430839316-oxs.tgz-md5sum.txt
• grin-0.3.1-pre.1-430839318-linux-amd64.tgz
• grin-0.3.1-pre.1-430839318-linux-amd64.tgz-md5sum.txt

Change Log of Release

Currently, Grin release is using automatic change log generating, thanks to github-changelog-generator. These change logs are fully automated generated, and normally there's no human editing on these change logs, but in case of any exception display on release page, we could do a little manual fixing on that.

The github changelog generator heavily rely on the Github project *issues, pull requests, so for achieving a good change log on each release, we have to follow some rules on the daily management of github issues and pull request.

And this changelog generator will collect all the github closed issues and merged pull-requests, since last tag.

Also it will give a link to fully compare this release with the previous tag in github.

Rules of Github Issue and Pull-Request Management

As said above, we have to define some basic rules for github issue and pull-request, but don't worry, it's quite simple!

Rules of Issue

The most important rule is to Distinguish Issues by Labels:

• Label bug issues as bug
• Label enhancement issues as enhancement

And all closed issues w/o label will be put into group "closed issues with no labels", which is definitely not so good.

As opposite, all closed issues with the following labels will be automatically excluded from the change log:

• question
• duplicate
• invalid
• wontfix

For more details, please run github_changelog_generator --help, or check its github repo: github-changelog-generator

Rules of Pull-Request

And regarding to merged pull-requests, it will be put into group "all merged pull-requests". And it's strongly recommended that each pull-request give a commit message with prefix:

• feat: A new feature
• fix: A bug fix
• docs: Documentation only changes
• style: Formatting, missing semi-colons, white-space, etc
• refactor: A code change that neither fixes a bug nor adds a feature
• perf: A code change that improves performance
• test: Adding missing tests
• chore: Maintain. Changes to the build process or auxiliary tools/libraries/documentation

These prefix are part of Angular.js commit message conventions, and you can take a look at the practice in Angular.js github project.

There's no need to fully follow Angular.js commit message conventions. We just need use these prefix in each pull-request's commit message, that's all. Perhaps a simple pull-request template can be set as default in Github.

Release Branches

Each time when Grin release a new version, there's definitely a tag there with same version number. But it's not mandatory to have a branch with this version release.

We define the following rules for the release branch:

1. Only MAJOR.MINOR version could have a release branch, but also NOT mandatory.
2. Only when a fix is needed for a MAJOR.MINOR version, we create a release branch on the name of MAJOR.MINOR from the tag of MAJOR.MINOR.0, and only one branch for all the fixes on this MAJOR.MINOR version.
3. New version based on this release branch must have same MAJOR.MINOR version number, only .PATCH can be changed.

Release Instruction

1. TAG

To trigger a version release, the ONLY thing which need to do manually is to make a tag. As the owner of a github repo, he/she just need to run 2 commands locally:

git tag 0.3.1-pre1 -m "0.3.1 pre release 1"
git push origin 0.3.1-pre1

Done. Remember to replace 0.3.1-pre1 as the real version, and warmly remind the Version Number Rule. For official release, just use 0.3.1 or something like that.

If you're NOT the owner of the github repo, but at least you have to be a committer which has the right to do a release, the following steps are needed to trigger a version release:

1. Go to release page of the repo, click Draft a new release, remember to check the branch is what you're working on! set the Tag version to the release number (for example: 0.3.1-pre1), and set anything in Release title and description, then click Publish release. Don't worry the title and description parts because we need delete it in next step.
2. Because github release will be auto-created by our auto-release building script, we MUST delete the release which we just created in previous step! (Unfortunately, there's no way to only create tag by web.)

Even normally Travis-CI need tens of minutes to complete building, I suggest you complete step 2 quickly, otherwise the auto-release script will fail on error "release already exist".

2. Travis-CI Building

For building in both mac and Linux, we enabled the CI on both platforms, since we start doing this automatic binaries release.

The release building is just one of the TEST_DIRS, named as none. So each time when version release building is triggered, all those exising Travis-CI tests are also triggered, this design is for the CI test purpose and we hope this new added auto release script has no any impact on these existing CI tests.

So, the point is: the release building job is that one tagged with TEST_DIR=none.

Note: auto-release script will only be executed on deploy stage, and according to Travis-CI, it will be skipped for any pull-request trigger, and since we set tag: true it will be only executed when triggered by a tag.

3. Check the Release Page

The last step is to check the Github release page, after Travis-CI complete the whole building, normally it need half an hour or one hour.