From 8cbfdf70d916e9c2ed77947ebadb2d70e42b6c43 Mon Sep 17 00:00:00 2001
From: Rodney Lorrimar <rodney.lorrimar@iohk.io>
Date: Tue, 3 Jul 2018 04:01:04 +1000
Subject: [PATCH] [DEVOPS-937] nix: use cleanSourceWith for source filtering

---
 default.nix                   | 24 +-----------------------
 explorer/frontend/default.nix | 29 +++++++++--------------------
 lib.nix                       | 15 ++++++++++++++-
 3 files changed, 24 insertions(+), 44 deletions(-)

diff --git a/default.nix b/default.nix
index 15e2c851b56..de012c35cdb 100644
--- a/default.nix
+++ b/default.nix
@@ -113,29 +113,7 @@ let
         # Provide a dummy installPhase for benchmark packages.
         installPhase = "mkdir -p $out";
       }) // optionalAttrs (args ? src) {
-        src = let
-           cleanSourceFilter = with pkgs.stdenv;
-             name: type: let baseName = baseNameOf (toString name); in ! (
-               # Filter out .git repo
-               (type == "directory" && baseName == ".git") ||
-               # Filter out editor backup / swap files.
-               lib.hasSuffix "~" baseName ||
-               builtins.match "^\\.sw[a-z]$" baseName != null ||
-               builtins.match "^\\..*\\.sw[a-z]$" baseName != null ||
-
-               # Filter out locally generated/downloaded things.
-               baseName == "dist" ||
-
-               # Filter out the files which I'm editing often.
-               lib.hasSuffix ".nix" baseName ||
-               # Filter out nix-build result symlinks
-               (type == "symlink" && lib.hasPrefix "result" baseName)
-             );
-
-          in
-            if (builtins.typeOf args.src) == "path"
-              then builtins.filterSource cleanSourceFilter args.src
-              else args.src or null;
+        src = localLib.cleanHaskellSource args.src;
       } // optionalAttrs enableDebugging {
         # TODO: DEVOPS-355
         dontStrip = true;
diff --git a/explorer/frontend/default.nix b/explorer/frontend/default.nix
index 6deb5a06c89..4ef2bb3cb99 100644
--- a/explorer/frontend/default.nix
+++ b/explorer/frontend/default.nix
@@ -11,26 +11,14 @@ in
 with pkgs.lib;
 
 let
-  cleanSourceFilter = with pkgs.stdenv;
-    name: type: let baseName = baseNameOf (toString name); in ! (
-      # Filter out .git repo
-      (type == "directory" && baseName == ".git") ||
-      # Filter out editor backup / swap files.
-      lib.hasSuffix "~" baseName ||
-      builtins.match "^\\.sw[a-z]$" baseName != null ||
-      builtins.match "^\\..*\\.sw[a-z]$" baseName != null ||
-
-      # Filter out locally generated/downloaded things.
-      baseName == "bower_components" ||
-      (type == "directory" && (baseName == "node_modules" || baseName == "dist")) ||
-
-      # Filter out the files which I'm editing often.
-      lib.hasSuffix ".nix" baseName ||
-      # Filter out nix-build result symlinks
-      (type == "symlink" && lib.hasPrefix "result" baseName)
-    );
-
-  src = builtins.filterSource cleanSourceFilter ./.;
+  src = cleanSourceWith {
+    src = localLib.cleanHaskellSource ./.;
+    filter = with pkgs.stdenv;
+      name: type: let baseName = baseNameOf (toString name); in ! (
+        # Filter out locally generated/downloaded things.
+        baseName == "bower_components" || baseName == "node_modules"
+      );
+  };
 
   bowerComponents = pkgs.buildBowerComponents {
     name = "cardano-sl-explorer-frontend-deps";
@@ -69,6 +57,7 @@ let
         cardano-sl-explorer
         purescript
       ];
+      passthru = { inherit bowerComponents; };
       postConfigure = ''
         rm -rf .psci_modules .pulp-cache bower_components output result
 
diff --git a/lib.nix b/lib.nix
index f6ae2f91e45..6ab4039f768 100644
--- a/lib.nix
+++ b/lib.nix
@@ -12,10 +12,23 @@ let
        then result
        else default;
 
+  cleanHaskellSource = src:
+    if (builtins.typeOf src) == "path"
+      then lib.cleanSourceWith {
+        filter = with pkgs.stdenv;
+          name: type: let baseName = baseNameOf (toString name); in ! (
+            # Filter out cabal build products
+            baseName == "dist" ||
+            # Filter out files which don't affect cabal build
+            lib.hasSuffix ".nix" baseName
+          );
+        src = lib.cleanSource src;
+      } else src;
+
   pkgs = import fetchNixPkgs {};
   lib = pkgs.lib;
 in lib // (rec {
-  inherit fetchNixPkgs;
+  inherit fetchNixPkgs cleanHaskellSource;
   isCardanoSL = lib.hasPrefix "cardano-sl";
   isBenchmark = args: !((args.isExecutable or false) || (args.isLibrary or true));
 })