changelog-maker

A git log to CHANGELOG.md tool

Eh?

changelog-maker is a formalisation of the Node.js CHANGELOG.md entry process but flexible enough to be used on other repositories.
changelog-maker will look at the git log of the current directory, pulling entries since the last tag. Commits with just a version number in the summary are removed, as are commits prior to, and including summaries that say working on <version> (this is an io.js / Node ism).
After collecting the list of commits, any that have PR-URL: <url> in them are looked up on GitHub and the labels of the pull request are collected, specifically looking for labels that start with semver (the assumption is that semver-minor, semver-major labels are used to indicate non-patch version bumps).
Finally, the list is formatted as Markdown and printed to stdout.
Each commit will come out something like this (on one line):

* [[`20f8e7f17a`](https://github.com/nodejs/io.js/commit/20f8e7f17a)] -
  **test**: remove flaky test functionality (Rod Vagg)
  [#812](https://github.com/nodejs/io.js/pull/812)

Note:

• When running changelog-maker on the command-line, the default GitHub repo is computed from the package.json that exists on cwd, otherwise fallback to nodejs/node, you can change this by supplying the user/org as the first argument and project as the second. e.g changelog-maker joyent node.
• Commit links will go to the assumed repo (default: nodejs/node)
• If a commit summary starts with a word, followed by a :, this is treated as a special label and rendered in bold
• Commits that have semver* labels on the pull request referred to in their PR-URL have those labels printed out at the start of the summary, in bold, upper cased.
• Pull request URLs come from the PR-URL data, if it matches the assumed repo (default: nodejs/node) then just a # followed by the number, if another repo then a full user/project#number.

When printing to a console some special behaviours are invoked:

• Commits with a summary that starts with doc: are rendered in grey
• Commits that have a semver* label on the pull request referred to in their PR-URL are rendered in bold green

Install

npm i changelog-maker -g

Usage

changelog-maker [--plaintext|p] [--markdown|md] [--sha] [--group|-g] [--reverse] [--find-matching-prs] [--commit-url=<url/with/{ref}>] [--start-ref=<ref>] [--end-ref=<ref>] [github-user[, github-project]]
github-user and github-project should point to the GitHub repository that can be used to find the PR-URL data if just an issue number is provided and will also impact how the PR-URL issue numbers are displayed

• --format: dictates what formatting the output will have. Possible options are: simple, markdown, plaintext, messageonly and sha. The default is to print a simple output suitable for stdout.

- simple: don't print full markdown output, good for console printing without the additional fluff. - sha: print only the 10-character truncated commit hashes. - plaintext: a very simple form, without commit details, implies --group. - markdown: a Markdown formatted from, with links and proper escaping. - messageonly: displays the commit message only, implies --group

• --sha: same as --format=sha.
• --plaintext: same as --format=plaintext.
• --markdown: same as --format=markdown.
• --messageonly: same as --format=messageonly.
• --group: reorder commits so that they are listed in groups where the xyz: prefix of the commit message defines the group. Commits are listed in original order within group.
• --reverse: reverse the order of commits when printed, does not work with --reverse
• --commit-url: pass in a url template which will be used to generate commit URLs for a repository not hosted in Github. {ref} is the placeholder that will be replaced with the commit, i.e. --commit-url=https://gitlab.com/myUser/myRepo/commit/{ref}
• --start-ref=<ref>: use the given git <ref> as a starting point rather than the last tag. The <ref> can be anything commit-ish including a commit sha, tag, branch name. If you specify a --start-ref argument the commit log will not be pruned so that version commits and working on <version> commits are left in the list.
• --end-ref=<ref>: use the given git <ref> as a end-point rather than the now. The <ref> can be anything commit-ish including a commit sha, tag, branch name.
• --filter-release: exclude Node-style release commits from the list. e.g. "Working on v1.0.0" or "2015-10-21 Version 2.0.0" and also "npm version X" style commits containing only an x.y.z semver designator.
• --find-matching-prs: use the GitHub API to find the pull requests that match commits that don't have the PR-URL metadata in their message text. Without metadata, it may be necessary to also pass the org/user and repo name on the commandline (as the github-user and github-project arguments as demonstrated above, it may also be necessary to use --find-matching-prs=true in this case).
• --quiet or -q: do not print to process.stdout
• --all or -a: process all commits since beginning, instead of last tag.
• --help or -h: show usage and help.

Development

Tests require GitHub authentication in order to fetch pull request metadata. ghauth will generate, store and load a personal access token in your local user configuration when changelog-maker is run during normal operation. To run the tests, you will need to ensure that you have a token in place. There are two ways to do this:

1. Run node ./changelog-maker.js -a to cause changelog-maker to fetch metadata on a commit with a PR-URL.

1. Manually generate a personal access token with public_repo scope. Then create a config.json file:

```json
{
  "user": "MY_GITHUB_USERNAME",
  "token": "MY_SECRET_TOKEN"
}
```

`user` is your username, and `token` is the token you generated above. The location of `config.json` depends on the OS, please see <https://github.com/LinusU/node-application-config#config-location>

License

changelog-maker is Copyright (c) 2015 Rod Vagg @rvagg and licenced under the MIT licence. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE.md file for more details.