AWS Maven Wagon

Description

This project is a fork of a Maven Wagon for Amazon S3. In order to to publish artifacts to an S3 bucket, the user (as identified by their access key) must be listed as an owner on the bucket.

Why this fork?

• Using AWS SDK v2.

Usage

TODO: To publish Maven artifacts to S3 a build extension must be defined in a project's pom.xml. The latest version of the wagon can be found on the aws-maven page in Maven Central.

<project>
  ...
  <build>
    ...
    <extensions>
      ...
      <extension>
        <groupId>io.github.kuraun</groupId>
        <artifactId>aws-maven</artifactId>
        <version>7.0.0.RELEASE</version>
      </extension>
      ...
    </extensions>
    ...
  </build>
  ...
</project>

Once the build extension is configured distribution management repositories can be defined in the pom.xml with an s3:// scheme.

<project>
  ...
  <distributionManagement>
    <repository>
      <id>aws-release</id>
      <name>AWS Release Repository</name>
      <url>s3://<BUCKET>/release</url>
    </repository>
    <snapshotRepository>
      <id>aws-snapshot</id>
      <name>AWS Snapshot Repository</name>
      <url>s3://<BUCKET>/snapshot</url>
    </snapshotRepository>
  </distributionManagement>
  ...
</project>

Finally the ~/.m2/settings.xml must be updated to include access and secret keys for the account. The access key should be used to populate the username element, and the secret access key should be used to populate the password element.

<settings>
  ...
  <servers>
    ...
    <server>
      <id>aws-release</id>
      <username>0123456789ABCDEFGHIJ</username>
      <password>0123456789abcdefghijklmnopqrstuvwxyzABCD</password>
      <configuration>
        <wagonProvider>s3</wagonProvider>
      </configuration>
    </server>
    <server>
      <id>aws-snapshot</id>
      <username>0123456789ABCDEFGHIJ</username>
      <password>0123456789abcdefghijklmnopqrstuvwxyzABCD</password>
      <configuration>
        <wagonProvider>s3</wagonProvider>
      </configuration>
    </server>
    ...
  </servers>
  ...
</settings>

Connecting through a Proxy

For being able to connect behind an HTTP proxy you need to add the following configuration to ~/.m2/settings.xml:

<settings>
  ...
  <proxies>
     ...
     <proxy>
         <active>true</active>
         <protocol>s3</protocol>
         <host>myproxy.host.com</host>
         <port>8080</port>
         <username>proxyuser</username>
         <password>somepassword</password>
         <nonProxyHosts>www.google.com|*.somewhere.com</nonProxyHosts>
     </proxy>
     ...
    </proxies>
  ...
</settings>

Alternatively, the access and secret keys for the account can be provided using (applied in order below)

• aws.accessKeyId and aws.secretKey system properties
• AWS_ACCESS_KEY_ID (or AWS_ACCESS_KEY) and AWS_SECRET_KEY (or AWS_SECRET_ACCESS_KEY) environment variables
• aws_access_key_id and aws_secret_access_key of aws cli
• The Amazon EC2 Instance Metadata Service

Making Artifacts Public

This wagon doesn't set an explict ACL for each artifact that is uploaded. Instead you should create an AWS Bucket Policy to set permissions on objects. A bucket policy can be set in the AWS Console and can be generated using the AWS Policy Generator.

In order to make the contents of a bucket public you need to add statements with the following details to your policy:

Effect	Principal	Action	Amazon Resource Name (ARN)
Allow	*	ListBucket	arn:aws:s3:::<BUCKET>
Allow	*	GetObject	arn:aws:s3:::<BUCKET>/*

If your policy is setup properly it should look something like:

{
  "Id": "Policy1397027253868",
  "Statement": [
    {
      "Sid": "Stmt1397027243665",
      "Action": [
        "s3:ListBucket"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::<BUCKET>",
      "Principal": {
        "AWS": [
          "*"
        ]
      }
    },
    {
      "Sid": "Stmt1397027177153",
      "Action": [
        "s3:GetObject"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::<BUCKET>/*",
      "Principal": {
        "AWS": [
          "*"
        ]
      }
    }
  ]
}

If you prefer to use the command line, you can use the following script to make the contents of a bucket public:

BUCKET=<BUCKET>
TIMESTAMP=$(date +%Y%m%d%H%M)
POLICY=$(cat<<EOF
{
  "Id": "public-read-policy-$TIMESTAMP",
  "Statement": [
    {
      "Sid": "list-bucket-$TIMESTAMP",
      "Action": [
        "s3:ListBucket"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::$BUCKET",
      "Principal": {
        "AWS": [
          "*"
        ]
      }
    },
    {
      "Sid": "get-object-$TIMESTAMP",
      "Action": [
        "s3:GetObject"
      ],
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::$BUCKET/*",
      "Principal": {
        "AWS": [
          "*"
        ]
      }
    }
  ]
}
EOF
)

aws s3api put-bucket-policy --bucket $BUCKET --policy "$POLICY"

Release Notes(TODO)

• 7.0.0
  • Updated to the 2.x versions of aws-sdk and maven-wagon.

License

Copyright 2019-Present Kuraun Developers.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.