aptly 1.1.0 release is following (a bit late) scheduled every 3 months release of aptly.
Upgrading
There're no steps required to upgrade from any version to 1.1.0, but *downgrading* from 1.1.0 to 1.0.x (or previous versions) is not supported due to changes in internal package pool layout.
Custom Filesystem Publishing
aptly supported configuring number of [S3](https://www.aptly.info/doc/feature/s3/) and [Swift](https://www.aptly.info/doc/feature/swift/) publishing endpoints for a long time, but local filesystem publishing was limited to default directory `~/.aptly/public` and hardlinking files. There was number of requests to allow use of symlinks or file copy to support publishing to different filesystems and shared locations like NFS.
With PR 521 from seeraven aptly supports [configuration of custom filesystem endpoints](https://www.aptly.info/doc/feature/filesystem/). Each endpoint has its own filesystem root, it might support either hardlinks, symlinks or simple file copy to reference files from aptly internal package pool.
Internal Package Pool
aptly stores package files deduplicated internal package pool (under `~/.aptly/pool` by default). MD5 checksum was used to build file path in the pool, which had two consequences:
1. MD5 checksum was required to pick location, so mirrors without MD5 checksums were not supported (228, 442).
2. In unlikely event when two different package files with same filename had same first two bytes of MD5 checksum, aptly would fail to import file (329).
In order to overcome those problems, package pool and internal package file storage was changed. Now aptly always recalculates checksums on files being downloaded or imported, making sure each file has full set of checksums (including SHA512). Location of package files in the pool now includes more bytes of SHA256 making conflict unlikely.
When upgrading from previous version, aptly would be able to find and use previously downloaded or imported package files, but new files would be stored in new locations. This means that downgrading from aptly 1.1.0 to previous versions is no longer supported (it's not advised to do that for any version of aptly, but with package pool changes this would make aptly loose track of package files). There are no special actions to upgrade aptly to 1.1.0.
Database Locking
There were several issues with `aptly api serve` with `-no-lock` which got fixed (431, 582). With 1.1.0 every aptly command on startup performs 10 attempts to reopen DB if database is locked. This makes easier to use CLI from cron or in CICD environments (401). Number of attempts is configurable with `-db-open-attempts` flag for every command. If you want to go back to pre-1.1.0 behaviour, use `-db-open-attempts=0`.
PGP Providers
GPG implementation is changing a lot in 2.x series, it's becoming harder and harder to support reliable interface to `gpg` command-line tool. aptly now supports [pluggable PGP providers](https://www.aptly.info/doc/feature/pgp-providers/). Two providers are implemented:
1. Previously used `gpg` provider (default for 1.1.0), which is invoking `gpg` command-line tool.
2. Internal PGP implementation based on https://github.com/golang/crypto/tree/master/openpgp.
Internal implementation is not as feature full as `gpg`, but it has better integration when signing repos, it doesn't require `gpg` to be installed. Key management (public/secret keyring) still requires `gpg`.
PGP provider could be changed with `-gpg-provider=[gpg|internal]` command-line flag or via `gpgProvider` configuration value.
Changes
aptly sorts search results and package lists (135, 214) with respect to correct version ordering.
It's allowed to create snapshots of empty repos (288).
aptly now correctly matches checksums for indexes while mirroring (376).
aptly packages from repo.aptly.info now correctly list `xz-utils` in dependencies (395).
aptly doesn't abort execution if `Contents` generation fails (451, 533).
aptly generates detailed log while resolving dependencies with `-dep-verbose-resolve` flag (508).
aptly can now optionally skip checking package files while downloading from the mirror (520).
aptly supports setting and inheriting from the mirror values for `Origin`, `NotAutomatic`, `BadAutomaticUpgrades` while publishing (577, thanks sliverc).
aptly trims slashes on publishing prefixes (613, 607).
Development
Development documentation is [now available](CONTRIBUTING.md).
aptly code is verified with set of linters both for Go source code and Python functional tests.
Files for back completion are now part of aptly source repository for easier packaging and PRs.
Download
Debian packages and binary distributions for various platforms are available at https://www.aptly.info/download/