From 85f0a9e875eee768766d7bdd24272d348f6b1e33 Mon Sep 17 00:00:00 2001
From: cashmere <cashmere@autistici.org>
Date: Tue, 21 Jul 2026 14:07:41 +0200
Subject: 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.
---
 .envrc      |  7 +++++++
 .gitignore  | 11 +++++++++++
 devenv.lock | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 devenv.nix  | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 devenv.yaml | 18 +++++++++++++++++
 5 files changed, 159 insertions(+)
 create mode 100644 .envrc
 create mode 100644 devenv.lock
 create mode 100644 devenv.nix
 create mode 100644 devenv.yaml

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..d9f8be7
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+eval "$(devenv direnvrc)"
+
+# You can pass flags to the devenv command
+# For example: use devenv --impure --option services.postgres.enable:bool true
+use devenv
diff --git a/.gitignore b/.gitignore
index b8e547d..1aaab13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,14 @@
 /target
 perf.*
 profile.svg
+
+# Devenv
+.devenv*
+devenv.local.nix
+devenv.local.yaml
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml
diff --git a/devenv.lock b/devenv.lock
new file mode 100644
index 0000000..b2e8779
--- /dev/null
+++ b/devenv.lock
@@ -0,0 +1,65 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1784630606,
+        "narHash": "sha256-P14j5mWQMhS4q8X/GPWTu0ibtolXvwLIwY/DUCcLaaE=",
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "3ed1df36d10ab30ce537e21460f5cac1f13df27f",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "inputs": {
+        "nixpkgs-src": "nixpkgs-src"
+      },
+      "locked": {
+        "lastModified": 1783345554,
+        "narHash": "sha256-LZhOm4kqjHUnwP4CNHpaqqEVcumGNd1PvOEOad8LkS0=",
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "6004ea8c229fe9d41b21c6f4c76bf6c2e10771dd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1783279667,
+        "narHash": "sha256-/NAkDSsve+GNM0Bt6tleJdCGfsTlK89nPjkVOzZMo0s=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f205b5574fd0cb7da5b702a2da51507b7f4fdd1b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
\ No newline at end of file
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/
+}
diff --git a/devenv.yaml b/devenv.yaml
new file mode 100644
index 0000000..3dcab58
--- /dev/null
+++ b/devenv.yaml
@@ -0,0 +1,18 @@
+# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allow_unfree to true.
+# allow_unfree: true
+
+# If you're not willing to allow unsupported packages:
+# allow_unsupported_system: false
+
+# If you're willing to use a package that's vulnerable
+# permitted_insecure_packages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend
-- 
cgit v1.3.1