Line listeners from @actions/exec is broken (#3)

Line listeners from @actions/exec is broken

CHANGELOG.md

@@ -5,3 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [1.0.1] - 2020-04-13
+
+### Changed
+
+- Fix #2: Line listeners from @actions/exec is broken

src/Cargo.ts

@@ -35,6 +35,8 @@ export class Cargo {
 
   ///
   async runCommand(command: string, args: string[]): Promise<number> {
+    let outBuffer = ''
+    let errBuffer = ''
     const resultCode = await exec.exec(
       'cargo',
       [
@@ -48,8 +50,20 @@ export class Cargo {
         silent: true,
         ignoreReturnCode: true,
         listeners: {
-          stdline: this.processOutputLine,
-          errline: this.processErrorLine,
+          stdout: (data: Buffer) => {
+            outBuffer = Cargo.processLineBuffer(
+              data,
+              outBuffer,
+              this.processOutputLine
+            )
+          },
+          stderr: (data: Buffer) => {
+            errBuffer = Cargo.processLineBuffer(
+              data,
+              errBuffer,
+              this.processErrorLine
+            )
+          },
           debug: this.processOutputLine
         }
       }
@@ -90,4 +104,26 @@ export class Cargo {
   private isFormatterSupport(command: string): boolean {
     return command !== 'fmt' && command !== 'audit'
   }
+
+  private static processLineBuffer(
+    data: Buffer,
+    strBuffer: string,
+    onLine: (line: string) => void
+  ): string {
+    const EOL = '\n'
+
+    let s = strBuffer + data.toString()
+    let n = s.indexOf(EOL)
+
+    while (n > -1) {
+      const line = s.substring(0, n)
+      onLine(line)
+
+      // the rest of the string ...
+      s = s.substring(n + EOL.length)
+      n = s.indexOf(EOL)
+    }
+
+    return s
+  }
 }