6104083817
Without the change metadata evaluation fails on package like
`zammad.src` where no fields are defined in `.nix `files:
src = fetchFromGitHub (lib.importJSON ./source.json);
There evaluation fails as:
$ nix-instantiate --strict --eval --expr 'with import ./. {}; zammad.src.meta'
error:
23| # to indicate where derivation originates, similar to make-derivation.nix's mkDerivation
24| position = "${position.file}:${toString position.line}";
| ^
25| };
error: value is null while a set was expected
After the change evaluation succeeds as:
$ nix-instantiate --strict --eval --expr 'with import ./. {}; zammad.src.meta'
{ homepage = "https://github.com/zammad/zammad"; }
64 lines
2.3 KiB
Nix
64 lines
2.3 KiB
Nix
{ lib, fetchgit, fetchzip }:
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lib.makeOverridable (
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{ owner, repo, rev, name ? "source"
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, fetchSubmodules ? false, leaveDotGit ? null
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, deepClone ? false, private ? false, forceFetchGit ? false
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, sparseCheckout ? []
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, githubBase ? "github.com", varPrefix ? null
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, meta ? { }
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, ... # For hash agility
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}@args:
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let
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position = (if args.meta.description or null != null
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then builtins.unsafeGetAttrPos "description" args.meta
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else builtins.unsafeGetAttrPos "rev" args
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);
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baseUrl = "https://${githubBase}/${owner}/${repo}";
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newMeta = meta // {
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homepage = meta.homepage or baseUrl;
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} // lib.optionalAttrs (position != null) {
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# to indicate where derivation originates, similar to make-derivation.nix's mkDerivation
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position = "${position.file}:${toString position.line}";
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};
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passthruAttrs = removeAttrs args [ "owner" "repo" "rev" "fetchSubmodules" "forceFetchGit" "private" "githubBase" "varPrefix" ];
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varBase = "NIX${lib.optionalString (varPrefix != null) "_${varPrefix}"}_GITHUB_PRIVATE_";
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useFetchGit = fetchSubmodules || (leaveDotGit == true) || deepClone || forceFetchGit || (sparseCheckout != []);
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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 useFetchGit 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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gitRepoUrl = "${baseUrl}.git";
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fetcherArgs = (if useFetchGit
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then {
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inherit rev deepClone fetchSubmodules sparseCheckout; url = gitRepoUrl;
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} // lib.optionalAttrs (leaveDotGit != null) { inherit leaveDotGit; }
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else {
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url = "${baseUrl}/archive/${rev}.tar.gz";
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passthru = {
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inherit gitRepoUrl;
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};
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}
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) // privateAttrs // passthruAttrs // { inherit name; };
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in
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fetcher fetcherArgs // { meta = newMeta; inherit rev owner repo; }
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)
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