go-latestver/docs/config.md
Knut Ahlers d7de10cbef
Fix: Update documentation
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2024-04-17 14:11:47 +02:00

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# Configuration file format
```yaml
---
catalog:
- name: alpine
tag: stable
fetcher: html
fetcher_config:
url: https://alpinelinux.org/downloads/
xpath: '//div[@class="l-box"]/p/strong'
links:
- icon_class: 'fas fa-globe'
name: 'Website'
url: 'https://alpinelinux.org'
version_constraint:
allow_downgrade: false
allow_prerelease: false
type: semver
check_interval: 1h
...
```
Each catalog entry contains a `name` and a `tag` representing the entry. You can choose those freely but they should be URL-safe. Some examples I'm using are: `alpine:stable`, `google-chrome:dev`, `google-chrome:stable`, `factorio:latest`, …
Additionally you will configure a `fetcher` with its corresponding `fetcher_config` for the catalog entry. In the example above the `html` fetcher is used with two attributes configured. The attributes for each fetcher can be found below.
You can provide your own `links` for each catalog entry which will be added to or override the links returned from the fetcher. If you provide the same `name` as the fetcher uses the link of the fetcher will be overridden. The `icon_class` should consist of `fas` or `fab` and an icon (for example `fa-globe`). You can use all **solid** (`fas`) or **breand** (`fab`) icons within [Font Awesome v5 Free](https://fontawesome.com/v5.15/icons?d=gallery&s=brands,solid&m=free).
For the `version_constraint`s you must specify a `type` to parse the version returned by the fetcher (currently `semver` and `numeric_dot` (`104.0.5112.79`) are supported) and then can allow downgrades and pre-releases in the version. If no constraint is present, versions are neither parsed nor checked for downgrade / pre-release. If only the `type` is specified, downgrades and pre-releases are forbidden.
## Available Fetchers
## Fetcher: `atlassian`
Fetches latest version of an Atlassian product
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `product` | ✅ | string | | Lowercase name of the product to fetch (e.g. confluence, crowd, jira-software, ...) |
| `edition` | | string | | Filter down the versions according to its edition (e.g. "Enterprise" or "Standard" for Confluence) |
| `search` | | string | `TAR.GZ` | What to search in the download description: default is to search for the standalone .tar.gz file |
## Fetcher: `git_tag`
Reads git tags (annotated and leightweight) from a remote repository and returns the newest one
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `remote` | ✅ | string | | Repository remote to fetch the tags from (should accept everything you can use in `git remote set-url` command) |
## Fetcher: `github_release`
Fetches the latest release from Github for a given repository not marked as pre-release
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `repository` | ✅ | string | | Repository to fetch in form `owner/repo` |
## Fetcher: `helm`
Fetches the index file of a Helm Repo and yields the latest Helm-Chart version
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `chart` | ✅ | string | | Chart to fetch the version of (i.e. "grafana") |
| `repo` | ✅ | string | | URL of the repo (i.e. "https://grafana.github.io/helm-charts") |
## Fetcher: `html`
Downloads website, selects text-node using XPath and optionally applies custom regular expression
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `url` | ✅ | string | | URL to fetch the HTML from |
| `xpath` | ✅ | string | | XPath expression leading to the text-node containing the version |
| `regex` | | string | `(v?(?:[0-9]+\.?){2,})` | Regular expression to apply to the text from the XPath expression |
## Fetcher: `json`
Fetches a JSON / JSONP file from remote source and traverses it using XPath expression
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `url` | ✅ | string | | URL to fetch the HTML from |
| `xpath` | ✅ | string | | XPath expression leading to the text-node containing the version |
| `jsonp` | | boolean | `false` | File contains JSONP function, strip it to get the raw JSON |
## Fetcher: `regex`
Fetches URL and applies a regular expression to extract a version from it
| Attribute | Req. | Type | Default Value | Description |
| --------- | :--: | ---- | ------------- | ----------- |
| `regex` | ✅ | string | | Regular expression (RE2) to apply to the text fetched from the URL. The regex MUST have exactly one submatch containing the version. |
| `url` | ✅ | string | | URL to fetch the content from |
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