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[perso/Immae/Config/Nix.git] / libs.nix

diff --git a/libs.nix b/libs.nix
index cef85869d513fba5227907955abe20eef49d60d0..57b0f64d6f37253e1523e735aec76777354fbb98 100644 (file)
--- a/libs.nix
+++ b/libs.nix
@@ -27,5 +27,30 @@ in
       src = fetchgit json.git;
     };
 
-  checkEnv = var: builtins.stringLength (builtins.getEnv var) > 0;
+  fetchedGitPrivate = path:
+    let
+      json = lib.importJSON path;
+    in rec {
+      version = json.tag;
+      name = "${json.meta.name}-${version}";
+      src = fetchgitPrivate json.git;
+    };
+
+  wrap = { paths ? [], vars ? {}, file ? null, script ? null, name ? "wrap" }:
+    assert file != null || script != null ||
+      abort "wrap needs 'file' or 'script' argument";
+    with rec {
+      set  = n: v: "--set ${pkgs.lib.escapeShellArg n} " +
+                    "${pkgs.lib.escapeShellArg v}";
+      args = (map (p: "--prefix PATH : ${p}/bin") paths) ++
+            (builtins.attrValues (pkgs.lib.mapAttrs set vars));
+    };
+    runCommand name
+      {
+        f           = if file == null then writeScript name script else file;
+        buildInputs = [ makeWrapper ];
+      }
+      ''
+        makeWrapper "$f" "$out" ${toString args}
+      '';
 }