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ts2workflows changelog

Version 0.15.0 - 2026-03-18

New features:

  • Static method Array.includes(arr, x) for checking if the array arr contain the value x

Fixes:

  • Print the correct source code line on error messages
  • Type annotation fixes in workflowslib

Version 0.14.0 - 2025-11-19

Fixes:

  • Blocking calls and assignments were generated in a wrong order in complex expressions
  • Don't output undefined arguments in call steps
  • Type annotation fixes in workflowslib

Version 0.13.0 - 2025-10-12

Fixes:

  • function identifiers (e.g. in call_step and parallel) are included in the --link output
  • Improve type annotations of map.* functions

Version 0.12.0 - 2025-08-30

New features:

  • New command line option --link generates self-contained YAML files (all needed subworkflows in one file)
  • Accepts Typescript's satisfies expression and debugger statement. They do not affect the YAML output.

Fixes:

  • Empty body in an if statements generated invalid code
  • In certain cases nested map literals generated invalid code
  • Some expressions with many extractable sub-expressions (map literals, blocking calls) generated invalid code because a temporary variable was re-used incorrectly
  • Empty statements are accepted at the top level
  • Ignore extra arguments in blocking function calls in all cases. Previously, extra arguments were ignored in some cases but threw errors in other cases.
  • Call expressions in optional chaining (data?.getPerson()?.name) now result in error. Previously, they were incorrectly treated as non-optional in the generated code.
  • Fixed code generation for an object rest element nested in an array pattern: const [{...rest}] = data

Version 0.11.0 - 2025-06-28

Breaking changes:

  • Requires Node 20 or newer and Typescript 5.4.0 or newer
  • retry_policy() must be called inside a try block, not after
  • Variable declarations with var are not supported, only let and const
  • Step name numbering starts from 1 at the start of each subworkflow

Fixes:

  • Type annotation fixes in workflowslib

Version 0.10.0 - 2025-04-28

  • Accept binary expressions as properties in assignments: a[i + 4] = 1 (regression in 0.9.0)
  • Evaluate side-effects only once on the left-hand side in compound assignments: x[f()] += 1
  • Fix calling call_step() on the right-hand side of a compound assignment: x += call_step(sum, {a: 10, b: 11})
  • Output an error if a subworkflow is empty because empty body is not allowed on GCP

Version 0.9.0 - 2025-04-23

Breaking changes:

  • True, TRUE, False and FALSE no longer are synonyms for true and false

New features:

  • Array and object destructuring: const [a, b] = getArray()

Fixes:

  • Fix a deployment error caused by the same temp variable name being used inside and outside of a parallel branch

Version 0.8.0 - 2025-03-03

  • Multiple input files can be given on the command line
  • Argument --outdir sets the output directory
  • Argument --project defines the TSConfig location for the source files
  • --(no-)generated-file-comment: optionally include a comment about the output file being generated
  • --version prints the correct version number
  • Accept instantiation expressions func<TYPE>

Version 0.7.0 - 2025-02-02

  • typeof operator
  • null is allowed as interpolated value in template literal ${null}
  • Accept undefined as a function argument default argument: func(a: number | undefined = undefined)
  • Optional function arguments: func(a?: number)

Version 0.6.0 - 2025-01-09

Breaking changes:

  • retry_policy() takes a plain policy function name instead of a {policy: ...} object

Fixes:

  • The try statement supports a finally block
  • Support empty body in a catch block
  • retry_policy() parameter values can now be expressions in addition to number literals
  • 0, "", false and null can now be used as subworkflow parameter default values
  • Type annotation fixes

Version 0.5.0 - 2024-11-09

  • Move nested map expressions to assign steps where necessary
  • Array.isArray() is transformed correcly in nested expressions

Version 0.4.0 - 2024-11-05

  • Optional chaining a?.b is converted to map.get(a, "b")
  • Non-null assertions person!.name is accepted but ignored to the transpiler
  • Merge a next step to a preceeding assign step
  • Accept a single-statement body (body without braces {}) in if, while, etc
  • Assign the result of call_step() to a member variable: obj.property = call_step()
  • parallel() and retry_policy() special functions can only be used as statements
  • Better error messages on RegExp, BigInt, spread syntax and other non-supported Javascript features

Version 0.3.0 - 2024-10-19

  • Function invocations no longer generate invalid empty variable names
  • Include more utility types: ReturnType, Partial, Required, etc.
  • Type annotation fixes

Version 0.2.0 - 2024-10-09

  • Reduce cases where maps are needlessly split off into assign statements
  • Accept (but ignore) "declare function"
  • Implemented Array.isArray()
  • Fixes to type annotations