67 lines
2.9 KiB
Nix
67 lines
2.9 KiB
Nix
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{ stdenv, fetchzip }@args:
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let lib = import ../extra-lib.nix {inherit (args.stdenv) lib;}; in
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with builtins; with lib;
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let
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default-fetcher = {domain ? "github.com", owner ? "", repo, rev, name ? "source", sha256 ? null, ...}@args:
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let ext = if args?sha256 then "zip" else "tar.gz";
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fmt = if args?sha256 then "zip" else "tarball";
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pr = match "^#(.*)$" rev;
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url = switch-if [
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{ cond = isNull pr && !isNull (match "^github.*" domain);
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out = "https://${domain}/${owner}/${repo}/archive/${rev}.${ext}"; }
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{ cond = !isNull pr && !isNull (match "^github.*" domain);
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out = "https://api.${domain}/repos/${owner}/${repo}/${fmt}/pull/${head pr}/head"; }
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{ cond = isNull pr && !isNull (match "^gitlab.*" domain);
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out = "https://${domain}/${owner}/${repo}/-/archive/${rev}/${repo}-${rev}.${ext}"; }
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{ cond = !isNull (match "(www.)?mpi-sws.org" domain);
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out = "https://www.mpi-sws.org/~${owner}/${repo}/download/${repo}-${rev}.${ext}";}
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] (throw "meta-fetch: no fetcher found for domain ${domain} on ${rev}");
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fetch = x: if args?sha256 then fetchzip (x // { inherit sha256; }) else fetchTarball x;
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in fetch { inherit url ; };
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in
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{
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fetcher ? default-fetcher,
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location,
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release ? {},
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releaseRev ? (v: v),
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}:
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let isVersion = x: isString x && match "^/.*" x == null && release?${x};
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shortVersion = x: if (isString x && match "^/.*" x == null)
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then findFirst (v: versions.majorMinor v == x) null
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(sort versionAtLeast (attrNames release))
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else null;
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isShortVersion = x: shortVersion x != null;
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isPathString = x: isString x && match "^/.*" x != null && pathExists x; in
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arg:
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switch arg [
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{ case = isNull; out = { version = "broken"; src = ""; broken = true; }; }
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{ case = isPathString; out = { version = "dev"; src = arg; }; }
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{ case = pred.union isVersion isShortVersion;
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out = let v = if isVersion arg then arg else shortVersion arg; in
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if !release.${v}?sha256 then throw "meta-fetch: a sha256 must be provided for each release"
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else {
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version = release.${v}.version or v;
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src = release.${v}.src or fetcher (location // { rev = releaseRev v; } // release.${v});
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};
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}
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{ case = isString;
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out = let
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splitted = filter isString (split ":" arg);
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rev = last splitted;
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has-owner = length splitted > 1;
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version = "dev"; in {
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inherit version;
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src = fetcher (location // { inherit rev; } //
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(optionalAttrs has-owner { owner = head splitted; }));
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}; }
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{ case = isAttrs;
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out = let
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{ version = arg.version or "dev";
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src = (arg.fetcher or fetcher) (location // (arg.location or {}));
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}; }
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{ case = isPath;
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out = {
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version = "dev" ;
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src = builtins.path {path = arg; name = location.name or "source";}; }; }
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] (throw "not a valid source description")
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