mirror of
https://github.com/rust-lang/crates.io-index.git
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78 lines
3 KiB
YAML
78 lines
3 KiB
YAML
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---
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# This workflow allows on-call operators to safely switch the value of the `dl`
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# key in `config.json` during an outage, to ensure people can continue building
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# projects with `cargo`.
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#
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# The workflow can be invoked through GitHub's UI.
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#
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# To add new options change `on.workflow_dispatch.inputs.url.options` to
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# include your new option, and then add the related environment variable in
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# the `env` section.
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name: Update download URL
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on:
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workflow_dispatch:
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inputs:
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url:
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description: Switch downloads to
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required: true
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type: choice
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options:
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# The format of this is "${id}:${description}". Each option
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# corresponds to the environment variable `URL_${id}`.
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- "api: API on Heroku (default)"
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- "cdn: CloudFront CDN"
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- "s3_primary: S3 bucket in us-west-1"
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- "s3_fallback: S3 bucket in eu-west-1"
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env:
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URL_api: "https://crates.io/api/v1/crates"
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URL_cdn: "https://static.crates.io/crates/{crate}/{crate}-{version}.crate"
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URL_s3_primary: "https://crates-io.s3-us-west-1.amazonaws.com/crates/{crate}/{crate}-{version}.crate"
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URL_s3_fallback: "https://crates-io-fallback.s3-eu-west-1.amazonaws.com/crates/{crate}/{crate}-{version}.crate"
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permissions:
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contents: write
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jobs:
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switch:
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# The option the user selected is included in the job name to permanently
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# log it, as those options are not otherwise logged and including it in the
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# build log would result in it being deleted after 90 days.
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name: Switch to ${{ github.event.inputs.url }}
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runs-on: ubuntu-latest
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steps:
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- name: Clone the source code
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uses: actions/checkout@v2
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- name: Switch the download endpoint
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run: |
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set -euo pipefail
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# Dynamically fetch the URL based on the choice the user made. The
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# first line calculates the environment variable name by
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# concatenating "URL_" and the part of the input before ":". Then the
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# second line fetches the value of the variable with that name.
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var_name="URL_$(echo "${{ github.event.inputs.url }}" | sed "s/:.*//")"
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url="${!var_name}"
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# Use `jq` to update the `dl` field of the configuration file while
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# preserving the rest of the contents.
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jq --arg url "${url}" '.dl = $url' config.json > updated-config.json
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# The GitHub API is used instead of `git commit`/`git push` to sign
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# the commit with GitHub's key. The sha of the previous `config.json`
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# is provided to make sure we don't override concurrent changes.
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curl \
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--fail \
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-X PUT \
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-H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
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-d "{
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\"message\": \"Switching download endpoint\",
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\"content\": \"$(base64 -w0 updated-config.json)\",
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\"sha\": \"$(git hash-object config.json)\"
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}" \
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https://api.github.com/repos/${{ github.repository }}/contents/config.json
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