gwl-0.2.1 released [stable]

[Ricardo Wurmus <rekado@elephly.net>]

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We are pleased to announce the release of the GNU Guix Workflow Language
version 0.2.1, representing 23 commits by one person.  This is a bug-fix
release to correct a few annoying bugs that went unnoticed in the
previous release.  One of the fixes unlocks the process output cache,
which was added in 0.2.0 but was always disabled.

• About

  The Guix Workflow Language (GWL) provides an extension to GNU Guix's
  declarative language for package management to automate the
  execution of programs in scientific workflows.  The GWL can use
  process engines to integrate with various computing environments.

• Download

Here are the compressed sources and a GPG detached signature[*]:
  https://ftpmirror.gnu.org/gwl/gwl-0.2.1.tar.gz
  https://ftpmirror.gnu.org/gwl/gwl-0.2.1.tar.gz.sig

Use a mirror for higher download bandwidth:
  https://www.gnu.org/order/ftp.html

[*] Use a .sig file to verify that the corresponding file (without the
.sig suffix) is intact.  First, be sure to download both the .sig file
and the corresponding tarball.  Then, run a command like this:

  gpg --verify gwl-0.2.1.tar.gz.sig

If that command fails because you don't have the required public key,
then run this command to import it:

  gpg --keyserver keys.gnupg.net --recv-keys BCA689B636553801C3C62150197A5888235FACAC

and rerun the 'gpg --verify' command.

This release was bootstrapped with the following tools:
  Autoconf 2.69
  Automake 1.16.1
  Gnulib v0.1-3269-g03d7a6b1f

• Changes in 0.2.1 (since 0.2.0)

** Documentation
- additional documentation of the “run-time” field and the “complexity” type
- added example of how to use =pick= with local variable definitions
** Bug fixes
- due to a faulty condition (a test whether a file is a directory),
  process outputs were never cached.  The condition has been
  corrected.
- outputs with absolute file names are no longer considered missing
- workflows without inputs no longer trigger an error

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