chore: configure eslint and fix lint errors (#84)

The lint check is now part of the "build" GH workflow.

The configuration is duplicated from
process-analytics/bpmn-visualization-js@48f63c2
In the future, the project may use a shared eslint configuration to
avoid duplication between repositories.

.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+max_line_length = 180
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.{md,adoc}]
+trim_trailing_whitespace = false

.eslintignore

@@ -0,0 +1,5 @@
+.idea/
+bin/
+config/
+dist/
+node_modules/

.eslintrc.js

@@ -0,0 +1,69 @@
+/*
+Copyright 2021 Bonitasoft S.A.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+module.exports = {
+  root: true,
+  plugins: ['notice'],
+  parser: '@typescript-eslint/parser', // Specifies the ESLint parser
+  extends: [
+    'plugin:prettier/recommended', // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
+  ],
+  parserOptions: {
+    ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
+    sourceType: 'module', // Allows for the use of imports
+  },
+  rules: {
+    'notice/notice': ['error', { templateFile: 'config/license-header.js', onNonMatchingHeader: 'replace' }],
+    'no-console': ['error', { allow: ['warn', 'error'] }],
+  },
+  overrides: [
+    // typescript
+    {
+      files: ['*.ts'],
+      extends: [
+        'plugin:@typescript-eslint/recommended', // Uses the recommended rules from the @typescript-eslint/eslint-plugin
+        'plugin:prettier/recommended', // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
+      ],
+      parserOptions: {
+        // This setting is required if you want to use rules which require type information
+        // https://typescript-eslint.io/packages/parser/#project
+        project: ['./packages/**/tsconfig.json', './tsconfig.eslint.json'],
+      },
+      rules: {
+        '@typescript-eslint/explicit-function-return-type': [
+          'error',
+          {
+            allowExpressions: true,
+            allowTypedFunctionExpressions: true,
+          },
+        ],
+        '@typescript-eslint/explicit-member-accessibility': [
+          'error',
+          {
+            accessibility: 'no-public',
+          },
+        ],
+        '@typescript-eslint/consistent-type-exports': [
+          'error',
+          {
+            fixMixedExportsWithInlineTypeSpecifier: true,
+          },
+        ],
+        '@typescript-eslint/consistent-type-imports': ['error'],
+      },
+    },
+  ],
+};

.github/workflows/build.yml

@@ -37,3 +37,5 @@ jobs:
         run: npm run build -w packages/addons
       - name: Check TypeScript Support
         run: npm test -w packages/check-ts-support
+      - name: Check Lint
+        run: npm run lint-check

.husky/pre-commit

@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx lint-staged

.prettierrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+  semi: true,
+  trailingComma: "all",
+  singleQuote: true,
+  arrowParens:"avoid",
+  endOfLine:"auto"
+};

config/license-header.js

@@ -0,0 +1,15 @@
+/*
+Copyright <%= YEAR %> Bonitasoft S.A.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/