Replace nyc with c8

.gitignore

@@ -1,7 +1,6 @@
-.DS_Store
-*.log
 coverage/
-.nyc_output/
 node_modules/
+.DS_Store
+*.log
 package-lock.json
 yarn.lock

package.json

@@ -32,10 +32,10 @@
     "Denis Augsburger <denis.augsburger@simpleen.io> (https://simpleen.io)"
   ],
   "devDependencies": {
+    "c8": "^7.0.0",
     "dox": "^0.9.0",
     "lerna": "^3.0.0",
     "mdast-zone": "^4.0.0",
-    "nyc": "^15.0.0",
     "parse-author": "^2.0.0",
     "prettier": "^2.0.0",
     "remark": "^13.0.0",
@@ -58,16 +58,10 @@
     "generate:presets": "node script/build-presets",
     "generate:rules": "node script/build-rules",
     "generate": "npm run generate:presets && npm run generate:rules",
-    "test-api": "node test",
-    "test-coverage": "nyc --reporter lcov tape test.js",
+    "test-api": "node --conditions development test.js",
+    "test-coverage": "c8 --check-coverage --branches 100 --functions 100 --lines 100 --statements 100 --reporter lcov npm run test-api",
     "test": "npm run generate && npm run format && npm run test-coverage"
   },
-  "nyc": {
-    "check-coverage": true,
-    "lines": 100,
-    "functions": 100,
-    "branches": 100
-  },
   "prettier": {
     "tabWidth": 2,
     "useTabs": false,

packages/remark-lint-checkbox-character-style/index.js

@@ -124,9 +124,9 @@ function checkboxCharacterStyle(tree, file, option) {
 
     type = types[node.checked]
 
-    /* istanbul ignore next - a list item cannot be checked and empty, according
-     * to GFM, but theoretically it makes sense to get the end if that were
-     * possible. */
+    // A list item cannot be checked and empty, according to GFM, but
+    // theoretically it makes sense to get the end if that were possible.
+    /* c8 ignore next */
     point = node.children.length === 0 ? end(node) : start(node.children[0])
     // Move back to before `] `.
     point.offset -= 2
@@ -137,8 +137,8 @@ function checkboxCharacterStyle(tree, file, option) {
       contents.slice(point.offset - 2, point.offset + 1)
     )
 
-    /* istanbul ignore if - failsafe to make sure we don‘t crash if there
-     * actually isn’t a checkbox. */
+    // Failsafe to make sure we don‘t crash if there actually isn’t a checkbox.
+    /* c8 ignore next */
     if (!value) return
 
     style = preferred[type]

packages/remark-lint-checkbox-content-indent/index.js

@@ -62,18 +62,18 @@ function checkboxContentIndent(tree, file) {
       return
     }
 
-    /* istanbul ignore next - a list item cannot be checked and empty, according
-     * to GFM, but theoretically it makes sense to get the end if that were
-     * possible. */
+    // A list item cannot be checked and empty, according to GFM, but
+    // theoretically it makes sense to get the end if that were possible.
+    /* c8 ignore next */
     point = node.children.length === 0 ? end(node) : start(node.children[0])
 
     // Assume we start with a checkbox, because well, `checked` is set.
     value = /\[([\t xX])]/.exec(
       contents.slice(point.offset - 4, point.offset + 1)
     )
 
-    /* istanbul ignore if - failsafe to make sure we don‘t crash if there
-     * actually isn’t a checkbox. */
+    // Failsafe to make sure we don‘t crash if there actually isn’t a checkbox.
+    /* c8 ignore next */
     if (!value) return
 
     // Move past checkbox.

packages/remark-lint-link-title-style/index.js

@@ -152,7 +152,8 @@ function linkTitleStyle(tree, file, option) {
     while (last) {
       final = contents.charAt(last)
 
-      /* istanbul ignore if - remark before 8.0.0 */
+      // Legacy for remark before 8.0.0
+      /* c8 ignore next 2 */
       if (/\s/.test(final)) {
         last--
       } else {

packages/remark-lint-list-item-content-indent/index.js

@@ -88,7 +88,8 @@ function listItemContentIndent(tree, file) {
 
         reason =
           'Don’t use mixed indentation for children, ' +
-          /* istanbul ignore next - hard to test, I couldn’t find it at least. */
+          // Hard to test, I couldn’t find it at least.
+          /* c8 ignore next */
           (diff > 0 ? 'add' : 'remove') +
           ' ' +
           abs +

packages/remark-lint-maximum-line-length/index.js

@@ -139,7 +139,8 @@ function maximumLineLength(tree, file, option) {
     var initial
     var final
 
-    /* istanbul ignore if - Nothing to allow when generated. */
+    // Nothing to allow when generated.
+    /* c8 ignore next 3 */
     if (generated(node)) {
       return
     }
@@ -165,7 +166,8 @@ function maximumLineLength(tree, file, option) {
   }
 
   function ignore(node) {
-    /* istanbul ignore else - Hard to test, as we only run this case on `position: true` */
+    // Hard to test, as we only run this case on `position: true`.
+    /* c8 ignore next 3 */
     if (!generated(node)) {
       allowList(start(node).line - 1, end(node).line)
     }

packages/remark-lint-no-paragraph-content-indent/index.js

@@ -98,7 +98,6 @@ function noParagraphContentIndent(tree, file) {
     var offset
     var lineColumn
 
-    /* istanbul ignore else - Custom nodes may be containers. */
     if (parent && parent.type === 'root') {
       column = 1
     } else if (parent && parent.type === 'blockquote') {

packages/remark-lint-no-table-indentation/index.js

@@ -81,7 +81,6 @@ function noTableIndentation(tree, file) {
     var offset
     var lineColumn
 
-    /* istanbul ignore else - Custom nodes may be containers. */
     if (parent && parent.type === 'root') {
       column = 1
     } else if (parent && parent.type === 'blockquote') {
@@ -90,6 +89,7 @@ function noTableIndentation(tree, file) {
       column = position.start(parent.children[0]).column
 
       // Skip past the first line if we’re the first child of a list item.
+      /* c8 ignore next 3 */
       if (parent.children[0] === node) {
         line++
       }
@@ -108,10 +108,6 @@ function noTableIndentation(tree, file) {
         offset--
       }
 
-      /* istanbul ignore else - Exit if we find some other content before this
-       * line.
-       * This might be because the paragraph line is lazy, which isn’t this
-       * rule. */
       if (!offset || /[\r\n>]/.test(content.charAt(offset - 1))) {
         offset = lineColumn
 

packages/unified-lint-rule/index.js

@@ -10,7 +10,8 @@ function factory(id, rule) {
   var ruleId = parts[1]
   var fn = wrapped(rule)
 
-  /* istanbul ignore if - possibly useful if externalised later. */
+  // Possibly useful if externalised later.
+  /* c8 ignore next 4 */
   if (!ruleId) {
     ruleId = source
     source = null
@@ -38,7 +39,8 @@ function factory(id, rule) {
         var message
 
         // Add the error, if not already properly added.
-        /* istanbul ignore if - only happens for incorrect plugins */
+        // Only happens for incorrect plugins.
+        /* c8 ignore next 5 */
         if (error && messages.indexOf(error) === -1) {
           try {
             file.fail(error)
@@ -66,7 +68,8 @@ function coerce(name, value) {
   var result
   var level
 
-  /* istanbul ignore if - Handled by unified in v6.0.0 */
+  // Handled by unified in v6.0.0.
+  /* c8 ignore next 3 */
   if (typeof value === 'boolean') {
     result = [value]
   } else if (value == null) {

script/util/rule.js

@@ -24,12 +24,12 @@ function ruleSync(filePath) {
   description = find(tags, 'fileoverview')
   name = find(tags, 'module')
 
-  /* istanbul ignore if */
+  /* c8 ignore next 3 */
   if (name !== ruleId) {
     throw new Error(ruleId + ' has an incorrect `@module`: ' + name)
   }
 
-  /* istanbul ignore if */
+  /* c8 ignore next 3 */
   if (!description) {
     throw new Error(ruleId + ' is missing a `@fileoverview`')
   }
@@ -55,8 +55,8 @@ function ruleSync(filePath) {
 
     try {
       info = JSON.parse(lines[0])
+      /* c8 ignore next 5 */
     } catch (error) {
-      /* istanbul ignore next */
       throw new Error(
         'Could not parse example in ' + ruleId + ':\n' + error.stack
       )
@@ -83,7 +83,7 @@ function ruleSync(filePath) {
       return
     }
 
-    /* istanbul ignore if */
+    /* c8 ignore next 9 */
     if (info.label !== 'input' && info.label !== 'output') {
       throw new Error(
         'Expected `input` or `ouput` for `label` in ' +