refactor(core): change page default date to 0000-00-00

BREAKING CHANGE: change page default date from 1970-01-01 to 0000-00-00

Author: meteorlxy

docs/reference/frontmatter.md

@@ -119,7 +119,7 @@ head:
   - The `date` frontmatter.
   - The filename that matches the date pattern `yyyy-MM-dd-foobar.md` or `yyyy-MM-foobar.md`.
   - The dirname that matches the date pattern `yyyy/MM/dd/foobar.md` or `yyyy/MM/foobar.md`.
-  - Fallback to `1970-01-01`.
+  - Fallback to `0000-00-00`.
 
 - Example:
 

docs/zh/reference/frontmatter.md

@@ -119,7 +119,7 @@ head:
   - Frontmatter 中的 `date` 字段。
   - 符合 `yyyy-MM-dd-foobar.md` 或 `yyyy-MM-foobar.md` 日期格式的文件名。
   - 符合 `yyyy/MM/dd/foobar.md` 或 `yyyy/MM/foobar.md` 日期格式的目录名。
-  - 默认值 `1970-01-01` 。
+  - 默认值 `0000-00-00` 。
 
 - 示例：
 

packages/@vuepress/core/__tests__/page/createPage.spec.ts

@@ -25,6 +25,6 @@ describe('core > page > createPage', () => {
     expect(page.headers).toEqual([])
     expect(page.links).toEqual([])
     expect(page.slug).toBe('')
-    expect(page.date).toBe('1970-01-01')
+    expect(page.date).toBe('0000-00-00')
   })
 })

packages/@vuepress/core/__tests__/page/resolvePageDate.spec.ts

@@ -32,7 +32,7 @@ const testCases: [
         filePathRelative: null,
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
   // `frontmatter.data` is `undefined`, and relative file path is `null`
   [
@@ -42,7 +42,7 @@ const testCases: [
         filePathRelative: null,
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
   // filename is empty
   [
@@ -52,7 +52,7 @@ const testCases: [
         filePathRelative: '',
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
   // filename without date prefix
   [
@@ -62,7 +62,7 @@ const testCases: [
         filePathRelative: 'foo.md',
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
   // filename with date prefix
   [
@@ -92,7 +92,7 @@ const testCases: [
         filePathRelative: 'foo/bar.md',
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
   // filename with date prefix, dirname without date prefix
   [
@@ -142,7 +142,7 @@ const testCases: [
         filePathRelative: '/',
       },
     ],
-    '1970-01-01',
+    '0000-00-00',
   ],
 ]
 

packages/@vuepress/core/src/page/resolvePageDate.ts

@@ -4,7 +4,7 @@ import { PageFrontmatter } from '../types'
 
 const FILENAME_DATE_RE = /^(\d{4})-(\d{1,2})(?:-(\d{1,2}))?-(.*)$/
 const DIRNAME_DATE_RE = /(\d{4})\/(\d{1,2})(?:\/(\d{1,2}))?(\/|$)/
-const defaultDate = '1970-01-01'
+const DEFAULT_DATE = '0000-00-00'
 
 /**
  * Resolve page date according to frontmatter or file path
@@ -26,16 +26,16 @@ export const resolvePageDate = ({
         frontmatter.date.getUTCMonth() + 1,
         frontmatter.date.getUTCDate(),
       ].join('-'),
-      defaultDate
+      DEFAULT_DATE
     )
   }
 
   if (isString(frontmatter.date)) {
-    return formatDateString(frontmatter.date, defaultDate)
+    return formatDateString(frontmatter.date, DEFAULT_DATE)
   }
 
   if (filePathRelative === null) {
-    return defaultDate
+    return DEFAULT_DATE
   }
 
   const filename = path.parse(filePathRelative).name
@@ -45,7 +45,7 @@ export const resolvePageDate = ({
     if (matches) {
       return formatDateString(
         `${matches[1]}-${matches[2]}-${matches[3] ?? '01'}`,
-        defaultDate
+        DEFAULT_DATE
       )
     }
   }
@@ -57,10 +57,10 @@ export const resolvePageDate = ({
     if (matches) {
       return formatDateString(
         `${matches[1]}-${matches[2]}-${matches[3] ?? '01'}`,
-        defaultDate
+        DEFAULT_DATE
       )
     }
   }
 
-  return defaultDate
+  return DEFAULT_DATE
 }

packages/@vuepress/shared/__tests__/utils/formatDateString.spec.ts

@@ -11,6 +11,9 @@ const testCasesFallback = [
   ['202-1-1', '1970-01-01'],
   ['2020-111-1', '1970-01-01'],
   ['2020-01-001', '1970-01-01'],
+  ['202-1-1', '0000-00-00'],
+  ['2020-111-1', '0000-00-00'],
+  ['2020-01-001', '0000-00-00'],
 ]
 
 describe('shared > formatDateString', () => {