Strange Build error in Azure Devops while using flutter

Question

I used this guide https://medium.com/@levelfivecoder/how-to-build-sign-and-distribute-your-flutter-android-application-using-azure-devops-and-appcenter-965382b85b8b to make a build script on my azure devops server.

After a few successful builds I got the next error: ##[error]Error: The process '/Users/runner/hostedtoolcache/Flutter/1.20.1-stable/macos/flutter/bin/flutter' failed with exit code 1

Anyone encountered this error?

Update

I change the version as suggested to flutter 1.17.5 and now getting the next log error:

2020-08-18T07:40:48.2833420Z 
2020-08-18T07:40:53.9032320Z Running "flutter pub get" in angusclient...                         5.6s
2020-08-18T07:42:13.0082500Z Running Gradle task 'assembleRelease'...                        
2020-08-18T07:42:13.0102150Z 
2020-08-18T07:42:13.0103930Z Compiler message:
2020-08-18T07:42:13.0104400Z 
2020-08-18T07:42:13.0104760Z 
2020-08-18T07:42:13.0105700Z lib/ui/Alerts.dart:63:36: Error: Getter not found: 'arrow_upward_sharp'.
2020-08-18T07:42:13.0108430Z 
2020-08-18T07:42:13.0110350Z                   icon: Icon(Icons.arrow_upward_sharp),
2020-08-18T07:42:13.0113380Z 
2020-08-18T07:42:13.0115060Z                                    ^^^^^^^^^^^^^^^^^^
2020-08-18T07:42:13.0116500Z 
2020-08-18T07:42:13.0118540Z lib/ui/Alerts.dart:99:45: Error: Getter not found: 'warning_amber_outlined'.
2020-08-18T07:42:13.0120570Z 
2020-08-18T07:42:13.0121300Z                         leading: Icon(Icons.warning_amber_outlined),
2020-08-18T07:42:13.0122660Z 
2020-08-18T07:42:13.0124090Z                                             ^^^^^^^^^^^^^^^^^^^^^^
2020-08-18T07:42:19.7446230Z 
2020-08-18T07:42:19.7448540Z Target kernel_snapshot failed: Exception: Errors during snapshot creation: null
2020-08-18T07:42:19.7448910Z 
2020-08-18T07:42:19.7450480Z build failed.
2020-08-18T07:42:19.8622130Z 
2020-08-18T07:42:19.8624860Z 
2020-08-18T07:42:19.8625260Z 
2020-08-18T07:42:19.8626630Z FAILURE: Build failed with an exception.
2020-08-18T07:42:19.8626970Z 
2020-08-18T07:42:19.8627080Z 
2020-08-18T07:42:19.8631600Z 
2020-08-18T07:42:19.8632370Z * Where:
2020-08-18T07:42:19.8632580Z 
2020-08-18T07:42:19.8633950Z Script '/Users/runner/hostedtoolcache/Flutter/1.17.5-stable/macos/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 882
2020-08-18T07:42:19.8640590Z 
2020-08-18T07:42:19.8644940Z 
2020-08-18T07:42:19.8645360Z 
2020-08-18T07:42:19.8645710Z 
2020-08-18T07:42:19.8646150Z * What went wrong:
2020-08-18T07:42:19.8647190Z Execution failed for task ':app:compileFlutterBuildRelease'.
2020-08-18T07:42:19.8647740Z 
2020-08-18T07:42:19.8648820Z > Process 'command '/Users/runner/hostedtoolcache/Flutter/1.17.5-stable/macos/flutter/bin/flutter'' finished with non-zero exit value 1
2020-08-18T07:42:19.8649590Z 
2020-08-18T07:42:19.8650010Z 
2020-08-18T07:42:19.8654130Z 
2020-08-18T07:42:19.8654380Z 
2020-08-18T07:42:19.8654850Z * Try:
2020-08-18T07:42:19.8656050Z Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
2020-08-18T07:42:19.8656480Z 
2020-08-18T07:42:19.8656630Z 
2020-08-18T07:42:19.8657370Z 
2020-08-18T07:42:19.8659660Z * Get more help at https://help.gradle.org
2020-08-18T07:42:19.8661880Z 
2020-08-18T07:42:19.8662150Z 
2020-08-18T07:42:19.8662590Z 
2020-08-18T07:42:19.8664140Z BUILD FAILED in 1m 24s
2020-08-18T07:42:20.6986960Z Running Gradle task 'assembleRelease'...                           86.4s
2020-08-18T07:42:20.7121710Z Gradle task assembleRelease failed with exit code 1
2020-08-18T07:42:20.7411260Z ##[error]Error: The process '/Users/runner/hostedtoolcache/Flutter/1.17.5-stable/macos/flutter/bin/flutter' failed with exit code 1
2020-08-18T07:42:20.7427470Z ##[section]Finishing: FlutterBuild

Thanks in advance to all the helpers :)

Answer 1

##[error]Error: The process '/Users/runner/hostedtoolcache/Flutter/1.20.1-stable/macos/flutter/bin/flutter' failed with exit code 1

According to the error message, I tested flutter build task. When the Build number is invalid, I could get the same error.

It seems that this issue is related with Pipeline Build number. And the Build number need to be an integer value. BuildNumber -> $(Date:yyyyMMdd).$(Rev:r)

Workaround:

You could manually set the buildnumber value as an integer value in Yaml file(name:integer value).

For example:

name: $(BuildID)
variables:
  projectDirectory: 'xxx_tracker'
trigger:
- master
jobs:
  - job: Android
    pool:
      vmImage: 'macOS-latest'
    steps:
    - task: FlutterInstall@0
      inputs:
        channel: 'stable'
        version: 'latest'
    
    - task: FlutterBuild@0
      inputs:
        target: apk
        projectDirectory: $(projectDirectory)

You can also set specific integer values in name field.

Here is a github feedback ticket with the same issue. You can follow this post to check if there is progress.

Update:

In addition, you can use flutter version 1.17.5 . It can also work fine. In this case, you don't need to set buildnumber.

- task: FlutterInstall@0
  inputs:
    channel: 'stable'
    version: 'custom'
    customVersion: '1.17.5'

Answer 2

In addition to using version 1.17.5, if you want to use the latest version of Flutter, which I recommended, there is another way to solve it.

ADD

name: $(Date:yyyyMMdd)$(Rev:r)

to the TOP of azure-pipelines.yml

like

name: $(Date:yyyyMMdd)$(Rev:r)
variables:
  projectDirectory: .
    
  jobs:
    - job: Android

Since $(Date:yyyyMMdd)$(Rev:.r) is used as $buildNumber, it is not available after version 1.17.5 (maybe flutter team fix it later). We can just simply change $(Rev:.r) to $(Rev:r). The build number be like 20200907.1 to 202009071

If you want to show prefix zeros in the number, you can add additional 'r' characters. For example, specify $(Rev:rr) if you want the Rev number to begin with 01, 02, and so on.

For more information about Configure run or build numbers, you can look this up.

Answer 3

It take me few hour to figure this out but I found workaround how to use build number which you specify in pubspec.yaml (i.g. version: 1.0.1+11) for FlutterBuild.

Documentation for this task says it is optional, but some weird number is used, but if you specify build number like: buildNumber: '' (empty quotation marks). Then magic happen and your aplication will be build with build number specified in pubspec.yaml.

- task: FlutterBuild@0
  displayName: 'Flutter Build'
  inputs:
    target: 'aab'
    projectDirectory: '$(Build.SourcesDirectory)'
    buildNumber: ''