This adds a new configuration setting: AzurePublishEndpoints, similar
to the existing S3PublishEndpoints and SwiftPublishEndpoints.
For each endpoint, the following has to be defined:
- accountName
- accountKey
- container
- prefix
Azure tests require the following environment variables to be set:
- AZURE_STORAGE_ACCOUNT
- AZURE_STORAGE_ACCESS_KEY
With either of these not set, Azure-specific tests are skipped.
Apply retries as global, config-level option `downloadRetries` so that
it can be applied to any aptly command which downloads objects.
Unwrap `errors.Wrap` which is used in downloader.
Unwrap `*url.Error` which should be the actual error returned from the
HTTP client, catch more cases, be more specific around failures.
upstream switched the alignment check backend and in doing so fails to run
if the old backend is defined in the config.
also skip alignment linting on a struct we use for byte decoding as we have
no choice in its member order.
Now that there's an official Go AWS SDK from Amazon, use that instead of
goamz. goamz isn't getting much love these days.
Implement support for STS credentials, as in assumed roles and EC2
instance profiles. The configuration is extended to support a session
token, though I'm not sure why anyone would put temporary credentials in
a configuration file. More likely, no credentials will be explicitly
configured at all, and they will be discovered through the standard SDK
mechanisms described at
<https://blogs.aws.amazon.com/security/post/Tx3D6U6WSFGOK2H/A-New-and-Standardized-Way-to-Manage-Credentials-in-the-AWS-SDKs>.
Resolves#342.
