From 227fbe844b13a8014f4419e88cf0fc86bb4a7ad7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=89=E5=92=B2=E6=99=BA=E5=AD=90?= <sxzz@sxzz.moe>
Date: Sat, 17 Sep 2022 15:23:13 +0800
Subject: [PATCH] fix: cannot find eof

---
 src/ts-errs-map.ts |  2 +-
 src/utils.ts       | 13 ++++++++-----
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/ts-errs-map.ts b/src/ts-errs-map.ts
index 500481a..4d3fad8 100644
--- a/src/ts-errs-map.ts
+++ b/src/ts-errs-map.ts
@@ -25,7 +25,7 @@ async function getErrPreviewLineByIndexFromFile(
   // line index is zero-based, so we need to minus 1
   const [prevLine, lineContent, nextLine] = await getLineByIndexesFromFile(
     filePath,
-    [line - 1 - 1, line - 1, line - 1 + 1]
+    [line - 1, line, line + 1]
   )
   return `${errMsg}
 
diff --git a/src/utils.ts b/src/utils.ts
index b0ba0de..0d8112f 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -28,7 +28,7 @@ export function isFilePath(absPath: string) {
 
 function createOutOfRangeError(filePath: string, lineIndex: number) {
   return new RangeError(
-    `Line with index ${lineIndex} does not exist in '${filePath}'. Note that line indexing is zero-based`
+    `Line with index ${lineIndex} does not exist in '${filePath}'.`
   )
 }
 
@@ -37,14 +37,15 @@ export function getLineByIndexesFromFile(
   lineIndexes: number[]
 ) {
   return new Promise<string[]>((resolve, reject) => {
-    if (lineIndexes.some((lineIndex) => lineIndex < 0 || lineIndex % 1 !== 0))
+    if (lineIndexes.some((lineIndex) => lineIndex <= 0 || lineIndex % 1 !== 0))
       return reject(new RangeError(`Invalid line number`))
 
-    let cursor = 0
+    let cursor = 1
     const input = fs.createReadStream(filePath)
     const rl = readline.createInterface({ input })
     const linesCollect: string[] = []
-    rl.on('line', (line) => {
+
+    function read(line: string) {
       if (cursor === Math.max(...lineIndexes)) {
         // the last index
         rl.close()
@@ -54,11 +55,13 @@ export function getLineByIndexesFromFile(
         linesCollect.push(line)
       }
       cursor++
-    })
+    }
 
+    rl.on('line', (line) => read(line))
     rl.on('error', reject)
 
     input.on('end', () => {
+      read('')
       reject(
         createOutOfRangeError(
           filePath,