79 lines
2.6 KiB
Python
Executable File
79 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env nix-shell
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#!nix-shell -I nixpkgs=./nixpkgs.nix -i python3 -p python3 curl nix
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import json
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import re
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import subprocess as sub
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import sys
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# fetch the release info from releases/latest
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def curl_latest_release():
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url = "https://api.github.com/repos/dhall-lang/dhall-haskell/releases/latest"
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return json.loads(sub.check_output(["curl", url]))
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# fetch the latest nixos unstable version
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def curl_latest_nixos_unstable():
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url = "https://nixos.org/channels/nixos-unstable/git-revision"
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return sub.check_output(["curl", "--location", url]).strip().decode()
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def update_nixpkgs(lockfile_path, new_hash):
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# --unpack produces the hash required by `builtins.fetchTarball`
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github_archive = "https://github.com/NixOS/nixpkgs/archive/{}.tar.gz".format(new_hash)
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hash = sub.check_output([
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"nix-prefetch-url", '--unpack', github_archive
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]).strip().decode()
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date = sub.check_output([
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"date", "--iso-8601=minutes"
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]).strip().decode()
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with open(lockfile_path, 'w') as f:
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json.dump({
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"comment": "autogenerated by fetch.py",
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"url": github_archive,
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"sha256": hash,
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"date": date
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}, f, indent=2)
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# call nix-prefetch-url on each asset to get their hashes
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def prefetch_binaries(release):
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res = []
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for a in release['assets']:
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if "linux" in a['name'] or "macOS" in a['name']:
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print(a['name'], file=sys.stderr)
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hash = sub.check_output([
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"nix-prefetch-url", a['browser_download_url']
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]).strip().decode()
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res += [{
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'name': a['name'],
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'url': a['browser_download_url'],
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'hash': hash
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}]
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return res
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# convert the list of binaries to an object we can address
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def postprocess(fetched):
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obj = {}
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for i in fetched:
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# split on the first digit ("dhall-foo-bar-1.2.3")
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name = re.split(r'-\d', i['name'])[0]
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post = "-linux" if "linux" in i['name'] else "-darwin"
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obj[name + post] = i
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return(obj)
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if __name__ == "__main__":
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print("updating nixpkgs to latest unstable", file=sys.stderr)
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nixos_hash = curl_latest_nixos_unstable()
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update_nixpkgs("./nixpkgs.json", nixos_hash)
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release = curl_latest_release()
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version = release['tag_name']
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print("updating to release {}".format(version), file=sys.stderr)
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fetched = prefetch_binaries(release)
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res = postprocess(fetched)
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print("writing ./release.json", file=sys.stderr)
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with open("./release.json", mode='w') as f:
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json.dump(res, f, indent=2)
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