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how-to-release.md

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How to release

Below you will find flows that talk about npm packages and webapps and libraries. Those are purely for the purpose of giving simple examples. The same flows apply to any repository that has been bootstrapped with support-firecloud, no matter the programming languaguage.

Semantic Versioning

See https://semver.org/spec/v2.0.0.html .

TL;DR :

  • pre-public versions
    • 0.0.1 initial version
    • 0.0.2 minor version with bugfixes, new features
    • 0.1.0 major version with bugfixes, new features, breaking changes
  • public versions
    • 1.0.0 initial public version
    • 1.0.1 patch version with bugfixes
    • 1.1.0 minor version with bugfixes, new features
    • 2.0.0 major version with bugfixes, new features, breaking changes

You don't need to remember all of these if you use the make release/* targets below.

  • make release/bugfix is equivalent to
    • make release/patch for pre-public versions
    • make release/patch for public versions
  • make release/feature is equivalent to
    • make release/patch for pre-public versions
    • make release/minor for public versions
  • make release/breaking is equivalent to
    • make release/minor for pre-public versions
    • make release/major for public versions
  • make release/public is equivalent to
    • make release/v1.0.0

npm packages as git tags

NOTE This section applies to packages which you intend to use as dependencies for other packages i.e. this section is for library repositories, not webapp repositories.

In order to simplify the release process and not depend on npm registries, we publish to the git repository itself thanks to npm-publish-git.

If that sounds weird to you, it is not. npm had support for git urls as dependencies](https://docs.npmjs.com/files/package.json#git-urls-as-dependencies) for a long time.

The biggest counter-argument to git urls as dependencies is that you end up checking out the source, the submodules, devDependecies, building, etc. every time you install the dependency, although you are only interested in the artifact.

And this is what npm-publish-git addresses. What you end up having in a git tag is an exact match of what would be available on a npm registry, so there are no git submodules to checkout, no devDependecies to install, no build process. Read more in the npm-publish-git README.

An example flow for publishing minlog which in its Makefile is using

cd path/to/minlog

# make changes

# save changes
git add
git commit -m "some changes"

# create a clean (nuked) build
# and bump the patch version
# and create a `git` tag via `npm version patch` e.g. v0.0.1
# and publish by overwriting it (old v0.0.1 tag is renamed to v0.0.1-src)
make release

From this point on, using git://github.com/tobiipro/minlog.git#v0.0.1 or git://github.com/tobiipro/minlog.git#semver:~0.0.1 is exactly the same as if minlog would be published on the npm registry and you would have used only 0.0.1, respectively ~0.0.1, as a version specifier.

npm packages as github artifacts

NOTE This section applies to repositories which you do NOT intend to use as dependencies for other packages i.e. this section is for webapp repositories, not library repositories.

github releases support attaching artifacts (or binaries).

One could manually create a release, or create one automatically via the CI.

We have this working for a few private repositories, integrated with Travis CI.

An example of a repository which in its Makefile is using

cd path/to/repo

# make changes

# save changes
git add
git commit -m "some changes"

# create a clean (nuked) build
# and bump the patch version
# and create a `git` tag via `npm version patch` e.g. v0.0.1
# and publish by pushing the v0.0.1 tag to the remote as is
make release

# this is then picked up by Travis CI, which will then publish the artifacts as a github release

Travis CI is then configured with

  1. a personal access token giving :repo access, via a GH_TOKEN environment variable
  2. a deploy flow, via .travis.yml with:
# 6. Deploy
before_deploy: ./.ci.sh before_deploy
deploy:
  - provider: script
    script: ./.ci.sh deploy
    skip_cleanup: true
    on:
      tags: true
after_deploy: ./.ci.sh after_deploy

.ci.sh is then configured with

ci_run_deploy() {
    local GIT_TAG=$(git tag -l --points-at HEAD | head -1)

    ${SUPPORT_FIRECLOUD_DIR}/bin/github-create-release \
        --repo-slug ${CI_REPO_SLUG} \
        --tag ${GIT_TAG} \
        --target $(git rev-parse HEAD) \
        --asset dist/app.zip \
        --asset snapshot.zip \
        --token ${GH_TOKEN}
}

NOTE The generation of the artifacts (e.g. the mentioned dist/app.zip and snapshot.zip) happen via make dist which is called by default in the before_deploy.

hotfix

NOTE This section applies to repositories which you do NOT intend to use as dependencies for other packages i.e. this section is for webapp repositories, not library repositories.

At times, we need to create hotfix releases for old versions. That is, we deployed version 1.2.3 which needs a small fix, but internally we're working on version 2.3.4 already.

What we need is to branch off from the 1.2.3 version, make the small fix, and release.

But we cannot follow the normal release process e.g. via make release/patch, because there might already be a version 1.2.4.

What we want is to create a 1.2.3-hotfix.1 release that doesn't overlap with any other version, and correctly signals that this is something in between 1.2.3 and 1.2.4.

We do that by running make release/vX.Y.Z-hotfix.N, where X.Y.Z is the current version and hotfix.N is an identifier and an index for the hotfix/custom release.

Here's an example

cd path/to/repo

git checkout -b small-fix-for-1.2.3 v1.2.3

# make changes

# save changes
git add
git commit -m "some changes"

# create a clean (nuked) build
# and bump the patch version
# and create a `git` tag via `npm version patch` e.g. v0.0.1
# and publish by pushing the v0.0.1 tag to the remote as is
make release/v.1.2.3-hotfix.1

# this is then picked up by Travis CI, which will then publish the artifacts as a github release

If you haven't done so already, please remember to merge your fixes to the master branch e.g. via git cherry-pick.