hy: 0.19.0 -> 1.0a1 and improvements

4 files changed, 86 insertions, 36 deletions

diff --git a/doc/languages-frameworks/hy.section.md b/doc/languages-frameworks/hy.section.md
new file mode 100644
index 00000000000..a851ff24dfc
--- /dev/null
+++ b/doc/languages-frameworks/hy.section.md
@@ -0,0 +1,31 @@
+# Hy {#sec-language-hy}
+
+## Installation {#ssec-hy-installation}
+
+### Installation without packages {#installation-without-packages}
+
+You can install `hy` via nix-env or by adding it to `configuration.nix` by reffering to it as a `hy` attribute. This kind of installation adds `hy` to your environment and it succesfully works with `python3`.
+
+::: {.caution}
+Packages that are installed with your python derivation, are not accesible by `hy` this way.
+:::
+
+### Installation with packages {#installation-with-packages}
+
+Creating `hy` derivation with custom `python` packages is really simple and similar to the way that python does it. Attribute `hy` provides function `withPackages` that creates custom `hy` derivation with specified packages.
+
+For example if you want to create shell with `matplotlib` and `numpy`, you can do it like so:
+
+```ShellSession
+$ nix-shell -p "hy.withPackages (ps: with ps; [ numpy matplotlib ])"
+```
+
+Or if you want to extend your `configuration.nix`:
+```nix
+{ # ...
+
+  environment.systemPackages = with pkgs; [
+    (hy.withPackages (py-packages: with py-packages; [ numpy matplotlib ]))
+  ];
+}
+```
diff --git a/doc/languages-frameworks/index.xml b/doc/languages-frameworks/index.xml
index 791afce6f5c..516bddf67fd 100644
--- a/doc/languages-frameworks/index.xml
+++ b/doc/languages-frameworks/index.xml
@@ -16,6 +16,7 @@
  <xi:include href="gnome.section.xml" />
  <xi:include href="go.section.xml" />
  <xi:include href="haskell.section.xml" />
+ <xi:include href="hy.section.xml" />
  <xi:include href="idris.section.xml" />
  <xi:include href="ios.section.xml" />
  <xi:include href="java.section.xml" />
diff --git a/pkgs/development/interpreters/hy/builder.nix b/pkgs/development/interpreters/hy/builder.nix
new file mode 100644
index 00000000000..6757f859ac1
--- /dev/null
+++ b/pkgs/development/interpreters/hy/builder.nix
@@ -0,0 +1,40 @@
+{ lib
+, python3Packages
+, hyDefinedPythonPackages /* Packages like with python.withPackages */
+, ...
+}:
+python3Packages.buildPythonApplication rec {
+  pname = "hy";
+  version = "1.0a1";
+
+  src = python3Packages.fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-lCrbvbkeutSNmvvn/eHpTnJwPb5aEH7hWTXYSE+AJmU=";
+  };
+
+  checkInputs = with python3Packages; [ flake8 pytest ];
+
+  propagatedBuildInputs = with python3Packages; [
+    appdirs
+    astor
+    clint
+    colorama
+    fastentrypoints
+    funcparserlib
+    rply
+    pygments
+  ] ++ (hyDefinedPythonPackages python3Packages);
+
+  # Hy does not include tests in the source distribution from PyPI, so only test executable.
+  checkPhase = ''
+    $out/bin/hy --help > /dev/null
+  '';
+
+  meta = with lib; {
+    description = "A LISP dialect embedded in Python";
+    homepage = "https://hylang.org/";
+    license = licenses.mit;
+    maintainers = with maintainers; [ nixy mazurel ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/interpreters/hy/default.nix b/pkgs/development/interpreters/hy/default.nix
index e39bf915cfc..f5d80c11d71 100644
--- a/pkgs/development/interpreters/hy/default.nix
+++ b/pkgs/development/interpreters/hy/default.nix
@@ -1,37 +1,15 @@
-{ lib, python3Packages }:
-
-python3Packages.buildPythonApplication rec {
-  pname = "hy";
-  version = "0.19.0";
-
-  src = python3Packages.fetchPypi {
-    inherit pname version;
-    sha256 = "05k05qmiiysiwdc05sxmanwhv1crfwbb3l8swxfisbzbvmv1snis";
-  };
-
-  checkInputs = with python3Packages; [ flake8 pytest ];
-
-  propagatedBuildInputs = with python3Packages; [
-    appdirs
-    astor
-    clint
-    colorama
-    fastentrypoints
-    funcparserlib
-    rply
-    pygments
-  ];
-
-  # Hy does not include tests in the source distribution from PyPI, so only test executable.
-  checkPhase = ''
-    $out/bin/hy --help > /dev/null
-  '';
-
-  meta = with lib; {
-    description = "A LISP dialect embedded in Python";
-    homepage = "http://hylang.org/";
-    license = licenses.mit;
-    maintainers = with maintainers; [ nixy ];
-    platforms = platforms.all;
-  };
+{ lib
+, callPackage
+, hyDefinedPythonPackages ? python-packages: [] /* Packages like with python.withPackages */
+}:
+let
+  withPackages = (
+    python-packages: callPackage ./builder.nix {
+      hyDefinedPythonPackages = python-packages;
+    }
+  );
+in
+(withPackages hyDefinedPythonPackages) // {
+  # Export withPackages function for hy customization
+  inherit withPackages;
 }