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#+TITLE: ccwl NEWS – History of user-visible changes
Copyright © 2021, 2024 Arun Isaac <arunisaac@systemreboot.net>
* Changes in 0.3.0 (since 0.2.0)
** Features
*** New ~array~ construct to specify array types
*** Allow specification of array input item separators
*** New pass-through ~identity~ construct
*** New scattering ~scatter~, ~scatter-cross~ and ~scatter-nested-cross~ constructs
*** New ~#:stdout~ and ~#:stderr~ parameters in commands
*** Support staging input files
*** Support returning command objects, not just workflow objects, from ccwl files
*** Allow literal values as arguments
*** Add message requesting users report uncaught exceptions as bugs
*** Allow steps with expressions that evaluate to commands
*** Allow steps with unspecified default arguments
*** Support specifying command requirements
*** Tolerate prefixed strings in ~#:run~ parameters of commands
*** Allow calling workflows inside other workflows
*** Deprecate auto-connection of single-input commands
** Compiler error messages
ccwl now comes with significantly better error messages that highlight
the exact context of errors in workflow descriptions.
*** Error out if arguments have been supplied more than once
*** Error out when ccwl file does not return supported object
*** Error out when unknown keys were passed to rename
*** Error out when workflow syntax is not recognized
*** Error out when body of workflow has multiple expressions
*** Error out on unrecognized keyword arguments to ~command~, ~input~ or ~output~
*** Error out on unexpected extra argument to unary keyword argument of ~command~, ~input~ or ~output~
*** Error out on unexpected positional argument to ~command~, ~input~ or ~output~
*** Error out when external CWL workflow files do not exist
*** Error out when undefined inputs are used in the ~#:run~ parameter of a command
*** Error out when command is not defined
*** Error out on argument prefixes that are not strings
*** Error out when ~#:other~ and ~#:binding~ parameters are not YAML serializable trees
*** Error out when workflow step is missing required parameters
*** Error out when workflow step does not accept input key
*** Error out when workflow step is supplied with unknown key
*** Error out when ~#:run~ argument to command is invalid
*** Error out when rename mappings are not an alternating sequence of keywords and symbols
** Noteworthy bug fixes
*** Escape all indicator characters when serializing YAML
*** Do not escape backslashes when serializing graphviz dot
*** When key is renamed, rename the corresponding CWL output ID too
*** Rename final workflow output correctly
** Other
*** Serialize atomic YAML dictionary values on the same line
*** Serialize YAML arrays with a single atomic value on the same line
*** New guile-lib dependency for ~(term ansi-color)~
* Changes in 0.2.0 (since 0.1.0)
** Documentation
*** New "Let's write a spell check workflow" section in the manual
*** New "Reuse external CWL workflows" section in the manual
** Features
*** Make workflow inputs global to all steps
*** Support renaming intermediate inputs and outputs
*** Support external CWL workflows
*** Support compiling workflows to graphviz dot language for rendering as a graph
** Other
*** New guile-libyaml dependency
* Initial release 0.1.0
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