34 lines
1.5 KiB
Nix
34 lines
1.5 KiB
Nix
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{ lib, fetchgit, fetchzip }:
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{ owner, repo, rev, name ? "source"
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, fetchSubmodules ? false, private ? false
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, githubBase ? "github.com", varPrefix ? null
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, ... # For hash agility
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}@args: assert private -> !fetchSubmodules;
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let
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baseUrl = "https://${githubBase}/${owner}/${repo}";
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passthruAttrs = removeAttrs args [ "owner" "repo" "rev" "fetchSubmodules" "private" "githubBase" "varPrefix" ];
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varBase = "NIX${if varPrefix == null then "" else "_${varPrefix}"}_GITHUB_PRIVATE_";
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# We prefer fetchzip in cases we don't need submodules as the hash
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# is more stable in that case.
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fetcher = if fetchSubmodules then fetchgit else fetchzip;
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privateAttrs = lib.optionalAttrs private {
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netrcPhase = ''
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if [ -z "''$${varBase}USERNAME" -o -z "''$${varBase}PASSWORD" ]; then
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echo "Error: Private fetchFromGitHub requires the nix building process (nix-daemon in multi user mode) to have the ${varBase}USERNAME and ${varBase}PASSWORD env vars set." >&2
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exit 1
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fi
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cat > netrc <<EOF
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machine ${githubBase}
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login ''$${varBase}USERNAME
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password ''$${varBase}PASSWORD
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EOF
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'';
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netrcImpureEnvVars = [ "${varBase}USERNAME" "${varBase}PASSWORD" ];
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};
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fetcherArgs = (if fetchSubmodules
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then { inherit rev fetchSubmodules; url = "${baseUrl}.git"; }
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else ({ url = "${baseUrl}/archive/${rev}.tar.gz"; } // privateAttrs)
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) // passthruAttrs // { inherit name; };
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in fetcher fetcherArgs // { meta.homepage = baseUrl; inherit rev; }
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