add devenv environment with rust toolchain and pango/cairo system deps

pangocairo's -sys crates need glib/cairo/pango via pkg-config; provide them through devenv so cargo build works on NixOS.

1 files changed, 58 insertions, 0 deletions

diff --git a/devenv.nix b/devenv.nix
new file mode 100644
index 0000000..6db7400
--- /dev/null
+++ b/devenv.nix
@@ -0,0 +1,58 @@
+{ pkgs, lib, config, inputs, ... }:
+
+{
+  # https://devenv.sh/basics/
+  env.GREET = "devenv";
+
+  # https://devenv.sh/packages/
+  packages = [
+    pkgs.git
+    # Needed by Emacs (flycheck-rust/eglot) outside of a full rustup env
+    pkgs.rust-analyzer
+    pkgs.rustfmt
+    pkgs.clippy
+    # System libraries required by pangocairo (via pkg-config)
+    pkgs.pkg-config
+    pkgs.glib
+    pkgs.cairo
+    pkgs.pango
+    pkgs.harfbuzz
+  ];
+
+  # https://devenv.sh/languages/
+  languages.rust.enable = true;
+
+  # https://devenv.sh/processes/
+  # processes.dev.exec = "${lib.getExe pkgs.watchexec} -n -- ls -la";
+
+  # https://devenv.sh/services/
+  # services.postgres.enable = true;
+
+  # https://devenv.sh/scripts/
+  scripts.hello.exec = ''
+    echo hello from $GREET
+  '';
+
+  # https://devenv.sh/basics/
+  enterShell = ''
+    hello         # Run scripts directly
+    git --version # Use packages
+  '';
+
+  # https://devenv.sh/tasks/
+  # tasks = {
+  #   "myproj:setup".exec = "mytool build";
+  #   "devenv:enterShell".after = [ "myproj:setup" ];
+  # };
+
+  # https://devenv.sh/tests/
+  enterTest = ''
+    echo "Running tests"
+    git --version | grep --color=auto "${pkgs.git.version}"
+  '';
+
+  # https://devenv.sh/git-hooks/
+  # git-hooks.hooks.shellcheck.enable = true;
+
+  # See full reference at https://devenv.sh/reference/options/
+}