feat: support files with more than 1000 lines by generateCodeFrame (vitejs#20508)

Author: sapphi-red

packages/vite/src/node/__tests__/__snapshots__/utils.spec.ts.snap

@@ -139,6 +139,17 @@ exports[`generateCodeFrames > start with position 3`] = `
 "
 `;
 
+exports[`generateCodeFrames > supports more than 1000 lines 1`] = `
+"
+1198 |  // 1197
+1199 |  // 1198
+1200 |  // 1199
+     |  ^
+1201 |  // 1200
+1202 |  // 1201
+"
+`;
+
 exports[`generateCodeFrames > works with CRLF 1`] = `
 "
 1  |  import foo from './foo'

packages/vite/src/node/__tests__/utils.spec.ts

@@ -288,6 +288,9 @@ foo()
 // 2
 // 3
 `.trim()
+  const veryLongSource = Array.from({ length: 2000 }, (_, i) => `// ${i}`).join(
+    '\n',
+  )
 
   const expectSnapshot = (value: string) => {
     try {
@@ -340,6 +343,10 @@ foo()
   test('invalid start > end', () => {
     expectSnapshot(generateCodeFrame(source, 2, 0))
   })
+
+  test('supports more than 1000 lines', () => {
+    expectSnapshot(generateCodeFrame(veryLongSource, { line: 1200, column: 0 }))
+  })
 })
 
 describe('getHash', () => {

packages/vite/src/node/utils.ts

@@ -511,6 +511,11 @@ export function generateCodeFrame(
     end !== undefined ? posToNumber(source, end) : start,
     source.length,
   )
+  const lastPosLine =
+    end !== undefined
+      ? numberToPos(source, end).line
+      : numberToPos(source, start).line + range
+  const lineNumberWidth = Math.max(3, String(lastPosLine).length + 1)
   const lines = source.split(splitRE)
   let count = 0
   const res: string[] = []
@@ -521,7 +526,7 @@ export function generateCodeFrame(
         if (j < 0 || j >= lines.length) continue
         const line = j + 1
         res.push(
-          `${line}${' '.repeat(Math.max(3 - String(line).length, 0))}|  ${
+          `${line}${' '.repeat(lineNumberWidth - String(line).length)}|  ${
             lines[j]
           }`,
         )
@@ -533,11 +538,15 @@ export function generateCodeFrame(
             1,
             end > count ? lineLength - pad : end - start,
           )
-          res.push(`   |  ` + ' '.repeat(pad) + '^'.repeat(length))
+          res.push(
+            `${' '.repeat(lineNumberWidth)}|  ` +
+              ' '.repeat(pad) +
+              '^'.repeat(length),
+          )
         } else if (j > i) {
           if (end > count) {
             const length = Math.max(Math.min(end - count, lineLength), 1)
-            res.push(`   |  ` + '^'.repeat(length))
+            res.push(`${' '.repeat(lineNumberWidth)}|  ` + '^'.repeat(length))
           }
           count += lineLength + 1
         }