Add devenv configuration

.envrc

@@ -0,0 +1,3 @@
+source_url "https://raw.githubusercontent.com/cachix/devenv/95f329d49a8a5289d31e0982652f7058a189bfca/direnvrc" "sha256-d+8cBpDfDBj41inrADaJt+bDWhOktwslgoP5YiGJ1v0="
+
+use devenv

.gitignore

@@ -10,3 +10,12 @@
 /spec/unit/.lib
 /tmp
 /docs/*.html
+# Devenv
+.devenv*
+devenv.local.nix
+
+# direnv
+.direnv
+
+# pre-commit
+.pre-commit-config.yaml

README.md

@@ -107,6 +107,19 @@ Run `make test` to run the test suites:
 
 Run `make docs` to build the manpages.
 
+### Devenv
+
+This repository contains a configuration for [devenv.sh](https://devenv.sh) which
+makes it easy to setup a reproducible environment with all necessary tools for
+building and testing.
+
+- Checkout the repository
+- Run `devenv shell` to get a shell with development environment
+
+A hook for [automatic shell activation](https://devenv.sh/automatic-shell-activation/)
+is also included. If you have `direnv` installed, the devenv environment loads
+automatically upon entering the repo folder.
+
 ## License
 
 Licensed under the Apache License, Version 2.0. See [LICENSE](./LICENSE) for

devenv.lock

@@ -0,0 +1,156 @@
+{
+  "nodes": {
+    "devenv": {
+      "locked": {
+        "dir": "src/modules",
+        "lastModified": 1713968789,
+        "owner": "cachix",
+        "repo": "devenv",
+        "rev": "b26b52a4dac68bdc305f6b9df948c97f49b2c3ee",
+        "treeHash": "4a034bbd3511c196f4075a1eb0da1b422d1011db",
+        "type": "github"
+      },
+      "original": {
+        "dir": "src/modules",
+        "owner": "cachix",
+        "repo": "devenv",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1696426674,
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "treeHash": "2addb7b71a20a25ea74feeaf5c2f6a6b30898ecb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "treeHash": "bd263f021e345cb4a39d80c126ab650bebc3c10c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "pre-commit-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "treeHash": "ca14199cabdfe1a06a7b1654c76ed49100a689f9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1713361204,
+        "owner": "cachix",
+        "repo": "devenv-nixpkgs",
+        "rev": "285676e87ad9f0ca23d8714a6ab61e7e027020c6",
+        "treeHash": "50354b35a3e0277d4a83a0a88fa0b0866b5f392f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "ref": "rolling",
+        "repo": "devenv-nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable": {
+      "locked": {
+        "lastModified": 1713995372,
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "dd37924974b9202f8226ed5d74a252a9785aedf8",
+        "treeHash": "8114bf8e19ad8c67c0e2639b83c606c58c7bccec",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-23.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "pre-commit-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "gitignore": "gitignore",
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable"
+      },
+      "locked": {
+        "lastModified": 1713954846,
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "rev": "6fb82e44254d6a0ece014ec423cb62d92435336f",
+        "treeHash": "a456512c8da29752b79131f1e5b45053e2394078",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "pre-commit-hooks.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "devenv": "devenv",
+        "nixpkgs": "nixpkgs",
+        "pre-commit-hooks": "pre-commit-hooks"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "treeHash": "cce81f2a0f0743b2eb61bc2eb6c7adbe2f2c6beb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

devenv.nix

@@ -0,0 +1,24 @@
+{ pkgs, lib, config, inputs, ... }:
+
+{
+  # https://devenv.sh/packages/
+  packages = with pkgs; [
+    # build deps
+    gnumake
+    asciidoctor
+
+    # test deps
+    git
+    fossil
+    mercurial
+  ];
+  enterShell = ''
+    crystal --version
+  '';
+
+  languages.crystal.enable = true;
+
+  # https://devenv.sh/pre-commit-hooks/
+  pre-commit.hooks.shellcheck.enable = true;
+  pre-commit.hooks.crystal.enable = true;
+}

devenv.yaml

@@ -0,0 +1,14 @@
+inputs:
+  nixpkgs:
+    url: github:cachix/devenv-nixpkgs/rolling
+
+# If you're using non-OSS software, you can set allowUnfree to true.
+# allowUnfree: true
+
+# If you're willing to use a package that's vulnerable
+# permittedInsecurePackages:
+#  - "openssl-1.1.1w"
+
+# If you have more than one devenv you can merge them
+#imports:
+# - ./backend