datapackage-pipelines-github 0.0.4

# datapackage-pipelines-github

Extension for `datapackage-pipelines` for pulling stuff from GitHub.
- **Pipelines and Processor Code** from a specific branch will be pulled
- **Issues** will be presented, using their title and description, as 'unable to start' pipelines.
- **Pull Requests** will be shown and executed, based on a predefined policies defining:
- Should pipeline specs be pulled from PRs
- Should processor code be pulled from PRs
- Which processors are allowed to run, when executing PRs

You can define separate policies for local PRs (from the same fork) or remote PRs (from another fork.)

note: When pulling code from PRs, we will only bring processors referenced from the
pipeline spec and residing in the same directory as the `pipeline-spec.yaml` file.

## Source spec

Place files named `github.source-spec.yaml` in your pipelines directory.
Each one should be of the form:
```yaml
<pipeline-id-prefix>:
repository: <owner/repo>
base-path: <where to look for pipelines and code. default is 'pipelines/'>
code: <if not present, won't fetch code. set to {} to use the defaults>
ref: <which branch/commit to use to get code from. default is 'master>
issues: <if not present, won't fetch issues. set to {} to use the defaults>
closed: <boolean, should fetch closed issues? default is no>
pipeline-id-format: <string, see below>
pull-requests: <if not present, won't fetch prs. set to {} to use the defaults>
local: <policy for local PRs>
specs: <boolean, should pull pipeline specs? default is yes>
code: <boolean, should pull code from PRs? default is yes>
disallow-processors: <which processors are not allowed to run in PRs? default is ["dump\..*"]>
- <regular-expression for processor name>
remote: <policy for remote PRs, same as local>
specs: <boolean, should pull pipeline specs? default is yes>
code: <boolean, should pull code from PRs? default is no>
disallow-processors: <which processors are not allowed to run in PRs? default is ["dump\..*"]>
- <regular-expression for processor name>
pipeline-id-format: <string, see below>
```

`pipeline-id-format` is a Python format string with two placeholders:
- `issue-id`: The issue/pr number
- `title-slug`: The issue title slug

The default format for issues is "issue/{issue-id:03}_{title-slug}"
The default format for pull-requests is "pr/{pr-id:03}_{title-slug}"

#### Example:
```yaml
dpp-github:
repository: firctionlessdata/datapackage-pipelines-github
code:
ref: master
pull-requests:
local:
specs: yes
code: yes
disallow-processors:
- "dump\..*"
remote:
specs: no
pipeline-id-format: "{title-slug}__{issue-id}"
issues:
closed: no
pipeline-id-format: "{title-slug}__{issue-id}"
```