From 83b12d2483a4f64a19637db65987960e9aaf5872 Mon Sep 17 00:00:00 2001
From: Ivan Bushchik <ivabus@ivabus.dev>
Date: Sun, 13 Aug 2023 17:59:59 +0300
Subject: [PATCH] Add shells/*

Signed-off-by: Ivan Bushchik <ivabus@ivabus.dev>
---
 README.md             |  6 +++++-
 shells/README.md      | 13 +++++++++++++
 shells/crossShell.nix | 15 +++++++++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 shells/README.md
 create mode 100644 shells/crossShell.nix

diff --git a/README.md b/README.md
index a6cbf18..592638e 100644
--- a/README.md
+++ b/README.md
@@ -24,9 +24,13 @@ Apple Silicon hosts require additional `--impure` flag for firmware installation
 - vetus (iMac 27" 2017)
 - celerrime (MacBook Air M2)
 
+## Shells
+
+I "made" some shell in [shells/](./shells).
+
 ## Dotfiles (from `ivabus/dotfiles`)
 
-I'm installing my dotfiles using (with prepared script)
+I install my dotfiles with prepared script
 
 ```shell
 curl https://iva.bz/nix | sh
diff --git a/shells/README.md b/shells/README.md
new file mode 100644
index 0000000..24c2a85
--- /dev/null
+++ b/shells/README.md
@@ -0,0 +1,13 @@
+# Shells
+
+- `crossShell.nix` - Just useful shell for cross compiling
+
+## Using
+
+```
+nix-shell PATH_TO_SHELL
+```
+
+### `crossShell.nix`
+
+By default configured for `aarch64-unknown-linux-musl`, but target may be replaced by adding crossSystem arg, like `--argstr crossSystem "x86_64-unknown-linux-musl"`.
diff --git a/shells/crossShell.nix b/shells/crossShell.nix
new file mode 100644
index 0000000..7d00a90
--- /dev/null
+++ b/shells/crossShell.nix
@@ -0,0 +1,15 @@
+{ crossSystem ? "aarch64-unknown-linux-musl" }:
+
+let pkgs = import <nixpkgs> {
+  crossSystem = {
+    config = crossSystem;
+  };
+};
+in
+  pkgs.callPackage (
+    {mkShell, pkg-config, zlib}:
+    mkShell {
+      nativeBuildInputs = [ pkg-config ];
+      buildInputs = [ zlib ];
+    }
+  ) {}