AWS CodeBuild throws an error "CLIENT_ERROR Message: no matching artifact paths found

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AWS CodeBuild throws an error "CLIENT_ERROR Message: no matching artifact paths found".

I'm trying to build a docker app using CodeCommit repository, Build phase seems to be passing without problems, but there is some issue with the artifact file path.

This is the link, I have referred https://youtu.be/MDMH_XXDbrI Timestamp: 48:18 to 56:24

Here is my buildspec:

```
version: 0.2

phases:

pre_build:

commands:

- echo Logging in to Amazon ECR...

- aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com

- REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME

- COMMIT_HASH=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)

- IMAGE_TAG=${COMMIT_HASH:=latest}

build:

commands:

- echo Build started on `date`

- echo Building the Docker image...
          
      - docker build -t $REPOSITORY_URI:latest .

- docker tag $REPOSITORY_URI:latest $REPOSITORY_URI:$IMAGE_TAG

post_build:

commands:

- echo Build completed on `date`

- echo Pushing the Docker image...

- docker push $REPOSITORY_URI:latest

- docker push $REPOSITORY_URI:$IMAGE_TAG

- echo Writing image definitions file...

- printf '[{"name":"%s","imageUri":"%s"}]' "$IMAGE_REPO_NAME" "$REPOSITORY_URI:$IMAGE_TAG" > imagedefinitions.json

artifacts:

files: imagedefinitions.json

```

Here is the build log:

```
[Container] 2023/05/06 06:40:30 Phase complete: PRE_BUILD State: SUCCEEDED

[Container] 2023/05/06 06:40:30 Phase context status code:  Message:

[Container] 2023/05/06 06:40:30 Entering phase BUILD

[Container] 2023/05/06 06:40:30 Phase complete: BUILD State: SUCCEEDED

[Container] 2023/05/06 06:40:30 Phase context status code:  Message:

[Container] 2023/05/06 06:40:30 Entering phase POST_BUILD

[Container] 2023/05/06 06:40:30 Phase complete: POST_BUILD State: SUCCEEDED

[Container] 2023/05/06 06:40:30 Phase context status code:  Message:

[Container] 2023/05/06 06:40:30 Expanding base directory path: .

[Container] 2023/05/06 06:40:30 Assembling file list

[Container] 2023/05/06 06:40:30 Expanding .

[Container] 2023/05/06 06:40:30 Expanding file paths for base directory .

[Container] 2023/05/06 06:40:30 Assembling file list

[Container] 2023/05/06 06:40:30 Expanding imagedefinitions.json

[Container] 2023/05/06 06:40:30 Skipping invalid file path imagedefinitions.json

[Container] 2023/05/06 06:40:30 Phase complete: UPLOAD_ARTIFACTS State: FAILED

[Container] 2023/05/06 06:40:30 Phase context status code: CLIENT_ERROR Message: no matching artifact paths found

```

I don't have a clue what is wrong here...

Accepted Answer

I made some changes in the last line of the buildspec.yml file.

```
version: 0.2

phases:
  pre_build:
    commands:
      - echo Logging in to Amazon ECR...
      - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
      - REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME
      - COMMIT_HASH=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)
      - IMAGE_TAG=${COMMIT_HASH:=latest}
  build:
    commands:
      - echo Build started on `date`
      - echo Building the Docker image...          
      - docker build -t $REPOSITORY_URI:latest .
      - docker tag $REPOSITORY_URI:latest $REPOSITORY_URI:$IMAGE_TAG    
  post_build:
    commands:
      - echo Build completed on `date`
      - echo Pushing the Docker image...
      - docker push $REPOSITORY_URI:latest
      - docker push $REPOSITORY_URI:$IMAGE_TAG
      - echo Writing image definitions file...
      - printf '[{"name":"%s","imageUri":"%s"}]' "$IMAGE_REPO_NAME" "$REPOSITORY_URI:$IMAGE_TAG" > imagedefinitions.json
artifacts:
    files: 
      - 'imagedefinitions.json'
```
And the Build was successful

Answer

I thought the syntax of the buildspec.yml was different when I checked the following documentation.  
https://docs.aws.amazon.com/codebuild/latest/userguide/build-spec-ref.html#build-spec-ref-syntax

I think "files" may be a list.  
So I thought the last line would be "- imagedefinitions.json".  
```
version: 0.2

phases:

pre_build:

commands:

- echo Logging in to Amazon ECR...

- aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com

- REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME

- COMMIT_HASH=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)

- IMAGE_TAG=${COMMIT_HASH:=latest}

build:

commands:

- echo Build started on `date`

- echo Building the Docker image...
          
      - docker build -t $REPOSITORY_URI:latest .

- docker tag $REPOSITORY_URI:latest $REPOSITORY_URI:$IMAGE_TAG

post_build:

commands:

- echo Build completed on `date`

- echo Pushing the Docker image...

- docker push $REPOSITORY_URI:latest

- docker push $REPOSITORY_URI:$IMAGE_TAG

- echo Writing image definitions file...

- printf '[{"name":"%s","imageUri":"%s"}]' "$IMAGE_REPO_NAME" "$REPOSITORY_URI:$IMAGE_TAG" > imagedefinitions.json

artifacts:

files: 
    - imagedefinitions.json
```

Another point to check is to make sure that imagedefinitions.json is located in "$CODEBUILD_SRC_DIR".
https://docs.aws.amazon.com/codebuild/latest/userguide/build-env-ref-env-vars.html

AWS CodeBuild throws an error "CLIENT_ERROR Message: no matching artifact paths found

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