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{ lib, fetchgit, fetchzip }:
lib.makeOverridable (
{ owner, repo, rev, name ? "source"
, fetchSubmodules ? false, leaveDotGit ? null
, deepClone ? false, private ? false, forceFetchGit ? false
, sparseCheckout ? []
, githubBase ? "github.com", varPrefix ? null
, meta ? { }
, ... # For hash agility
}@args:
let
position = (if args.meta.description or null != null
then builtins.unsafeGetAttrPos "description" args.meta
else builtins.unsafeGetAttrPos "rev" args
);
baseUrl = "https://${githubBase}/${owner}/${repo}";
newMeta = meta // {
homepage = meta.homepage or baseUrl;
# to indicate where derivation originates, similar to make-derivation.nix's mkDerivation
position = "${position.file}:${toString position.line}";
};
passthruAttrs = removeAttrs args [ "owner" "repo" "rev" "fetchSubmodules" "forceFetchGit" "private" "githubBase" "varPrefix" ];
varBase = "NIX${lib.optionalString (varPrefix != null) "_${varPrefix}"}_GITHUB_PRIVATE_";
useFetchGit = fetchSubmodules || (leaveDotGit == true) || deepClone || forceFetchGit || (sparseCheckout != []);
# We prefer fetchzip in cases we don't need submodules as the hash
# is more stable in that case.
fetcher = if useFetchGit then fetchgit else fetchzip;
privateAttrs = lib.optionalAttrs private {
netrcPhase = ''
if [ -z "''$${varBase}USERNAME" -o -z "''$${varBase}PASSWORD" ]; then
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
exit 1
fi
cat > netrc <<EOF
machine ${githubBase}
login ''$${varBase}USERNAME
password ''$${varBase}PASSWORD
EOF
'';
netrcImpureEnvVars = [ "${varBase}USERNAME" "${varBase}PASSWORD" ];
};
gitRepoUrl = "${baseUrl}.git";
fetcherArgs = (if useFetchGit
then {
inherit rev deepClone fetchSubmodules sparseCheckout; url = gitRepoUrl;
} // lib.optionalAttrs (leaveDotGit != null) { inherit leaveDotGit; }
else {
url = "${baseUrl}/archive/${rev}.tar.gz";
passthru = {
inherit gitRepoUrl;
};
}
) // privateAttrs // passthruAttrs // { inherit name; };
in
fetcher fetcherArgs // { meta = newMeta; inherit rev owner repo; }
)
|