treewide: Format with shellcheck, jsonlint and yamllint

nix/checks.nix

@@ -0,0 +1,65 @@
+let
+  sources = import ./default.nix;
+  pkgs = import sources.nixpkgs { };
+  pre-commit = import sources.git-hooks;
+
+  globalExcludes = [
+    "nix/default.nix"
+    ".*vendor"
+    ".*chart/.*"
+    ".*schema.json"
+  ];
+
+in
+pre-commit.run {
+  src = pkgs.nix-gitignore.gitignoreSource [ ] ../.;
+  # Do not run at pre-commit time
+  default_stages = [
+    "pre-push"
+  ];
+  # TODO(mrtz): Remove when default
+  package = pkgs.prek;
+  # Linters From https://github.com/cachix/pre-commit-hooks.nix
+  hooks = {
+    nixfmt-rfc-style = {
+      enable = true;
+      excludes = globalExcludes;
+    };
+
+    trim-trailing-whitespace.enable = true;
+
+    shellcheck = {
+      enable = true;
+      excludes = [
+        "vcluster/"
+      ];
+      args = [
+        "-x"
+        "-o"
+        "all"
+      ];
+    };
+
+    yamllint = {
+      enable = false;
+      excludes = [
+        "attic/"
+        "charts/templates/"
+        "charts/charts/"
+      ];
+      settings = {
+        strict = true;
+        configData = ''{ extends: default, rules: { document-start: disable, line-length: {max: 165} } }'';
+      };
+    };
+
+    check-json.enable = true;
+
+    renovate-config-validator = {
+      enable = true;
+      files = "renovate.json$";
+      entry = "renovate-config-validator";
+    };
+
+  };
+}

nix/sources.json

@@ -1,5 +1,18 @@
 {
   "pins": {
+    "git-hooks": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "cachix",
+        "repo": "git-hooks.nix"
+      },
+      "branch": "master",
+      "submodules": false,
+      "revision": "b68b780b69702a090c8bb1b973bab13756cc7a27",
+      "url": "https://github.com/cachix/git-hooks.nix/archive/b68b780b69702a090c8bb1b973bab13756cc7a27.tar.gz",
+      "hash": "1k99smax7zpa5cdw9afa4v4y4155amy21a8z5z8x3cikdz3gyx5p"
+    },
     "nixpkgs": {
       "type": "Channel",
       "name": "nixpkgs-unstable",