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https://github.com/NixOS/nixpkgs.git
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80 lines
2.1 KiB
Plaintext
Executable file
80 lines
2.1 KiB
Plaintext
Executable file
#!/usr/bin/env nix-shell
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#!nix-shell --packages curl
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#!nix-shell --packages jq
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#!nix-shell --packages parallel
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#!nix-shell -i bash
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# Exit immediately if a command exits with a non-zero status.
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# Exit when a producer fails in a pipe
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# Treat undefined variable references as errors
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set -e -o pipefail -u
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# Check if working directory is (probably) right
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test "./update" = $0 || {
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echo "The working directory ought to be the same is the update script location. Please invoke as ./update" 1>&2
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exit 1
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}
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# Create temporary directory with automatic cleanup
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readonly MY_TMP="$(mktemp -d)"
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cleanup () {
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rm -rf "$MY_TMP"
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}
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trap cleanup EXIT
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# stdout: file containing release info and a convenient placeholder
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# for the sha256 attribute
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getRelease () {
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local owner="$1"
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local repo="$2"
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local out="$MY_TMP/$owner--$repo-release"
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curl -fSs https://api.github.com/repos/"$owner"/"$repo"/releases/latest \
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| jq '{ version: .name, url: .tarball_url, sha256: "__SHA256__" }' \
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> "$out"
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echo "$out"
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}
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# 'getters' for the release info file
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# stdout: unquoted tarball url
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releaseUrl () {
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local file="$1"
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jq -r '.url' <"$file"
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}
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# stdout: unquoted version
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releaseVersion () {
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local file="$1"
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jq -r '.version' <"$file"
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}
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# Fetch release tarball and compute hash
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# stdout: base32 sha256 to be used in fetchurl
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getReleaseHash () {
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local file="$1"
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local name="$2"
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nix-prefetch-url "$(releaseUrl "$file")" --name "$name-$(releaseVersion "$file").tar.gz"
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}
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# Write a release info file to release-info/$owner-$repo.json
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updateRelease () {
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local owner="$1"
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local repo="$2"
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local r="$(getRelease "$owner" "$repo")"
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local hash="$(getReleaseHash "$r" "$repo")"
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sed \
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-e s/__SHA256__/"$hash"/\
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<"$r" \
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>"release-info/$owner-$repo.json"
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}
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