Extract Nix package for better compatability with Nixpkgs (#16)

Fixes #14

Author: tesujimath

bash-env-json

@@ -22,7 +22,7 @@
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-VERSION="0.9.2"
+VERSION="0.10.0a1"
 USAGE="bash-env-json [--help] [--shellfns <comma-separated-function-names>] [path]"
 
 shopt -s extglob

flake.nix

@@ -13,34 +13,7 @@
           pkgs = import nixpkgs {
             inherit system;
           };
-          bash-env-json =
-            let
-              inherit (pkgs) bash coreutils gnused jq makeWrapper writeShellScriptBin;
-              inherit (pkgs.lib) makeBinPath;
-
-              substFullPaths = program_package:
-                let replaceList = pkgs.lib.attrsets.mapAttrsToList (name: pkg: { from = " ${name} "; to = " ${pkg}/bin/${name} "; }) program_package; in
-                builtins.replaceStrings (map (x: x.from) replaceList) (map (x: x.to) replaceList);
-
-            in
-            (writeShellScriptBin "bash-env-json"
-              (substFullPaths
-                {
-                  env = pkgs.coreutils;
-                  jq = pkgs.jq;
-                  mktemp = pkgs.coreutils;
-                  rm = pkgs.coreutils;
-                  sed = pkgs.gnused;
-                  touch = pkgs.coreutils;
-                }
-                (builtins.readFile ./bash-env-json))).overrideAttrs (old: {
-              buildInputs = [ bash ];
-              buildCommand =
-                ''
-                  ${old.buildCommand}
-                  patchShebangs $out
-                '';
-            });
+          bash-env-json = import ./package.nix pkgs;
         in
         {
           devShells =

package.nix

@@ -0,0 +1,32 @@
+{ lib
+, bash
+, coreutils
+, gnused
+, jq
+, writeShellScriptBin
+, ...
+}:
+let
+  substFullPaths = program_package:
+    let replaceList = lib.attrsets.mapAttrsToList (name: pkg: { from = " ${name} "; to = " ${pkg}/bin/${name} "; }) program_package; in
+    builtins.replaceStrings (map (x: x.from) replaceList) (map (x: x.to) replaceList);
+
+in
+(writeShellScriptBin "bash-env-json"
+  (substFullPaths
+    {
+      env = coreutils;
+      jq = jq;
+      mktemp = coreutils;
+      rm = coreutils;
+      sed = gnused;
+      touch = coreutils;
+    }
+    (builtins.readFile ./bash-env-json))).overrideAttrs (old: {
+  buildInputs = [ bash ];
+  buildCommand =
+    ''
+      ${old.buildCommand}
+      patchShebangs $out
+    '';
+})