• Added -C/--condition-file option for loading full-program conditions from a external file.
• Added -T/--date-time option to display RFC 3339 timestamps in verbose mode.

• Added the -u/--unlimited option as a more clear alternative to -f/--forever. -f/--forever will remain available but is not recommended in new usage.
• In the internal retryConfig struct, split the FixedDelay interval into more logical ConstantDelay and MaxDelay. This affects the config output shown for debugging with -vvv.
• Added a new verbosity level -vvvv that includes zero values in the config output.

• Added a new CLI option -R/--report.
• Fixed a race condition when checking for the command's existence.
• Switched to a GOOS/GOARCH naming scheme for prebuilt binaries.

This release includes several relatively small breaking changes. The breaking changes to Starlark conditions were made to better introduce a new feature, regular-expression search on standard input/output/error.

Breaking changes

• The Starlark condition can be any truthy or falsy value, not just a boolean.
• Replaced the Starlark function flush_stdout() with the method stdout.flush().
• Changed error exit codes:
  • Command not found: from 255 to 127 (like POSIX shell)
  • Timeout: from 255 to 124 (like GNU and BSD timeout)
  • Unknown error: from -1 to 255 (for consistency between POSIX and Windows because Windows allows negative exit codes)
• Required Go 1.22 to build (was 1.19).

Features

• Implemented an object-oriented approach to standard input/output/error in Starlark condition expressions.
• Added a new CLI option -E/--hold-stderr that works like -O/--hold-stdout but for standard error. Added stderr.flush() in condition expressions.
• Added a new CLI option -s/--seed to set the random seed for reproducible jitter.
• Added regular-expression search on buffers: stdin.search(), stdout.search(), and stderr.search()
• Improved the option -j/--jitter to allow spaces around the comma in the value. For example, 1ms, 5ms is now valid.

• Added a new CLI option -O/--hold-stdout.

• Added a new CLI option -I/--replay-stdin.

• Fixed the delay being reset with every attempt when no -r/--reset option was given.
• Added a new CLI option -F/--fib.

• Added a new CLI option -r/--reset.

• Fixed time, total_time not being properly converted to seconds in Starlark conditions.
• Added a new Starlark function inspect for debugging conditions.
• Changed the log message "waiting 1s after attempt 2" to "waiting 1s before attempt 3". This is consistent with how exit codes are announced.

Full changelog: v2.0.4...v2.1.0.

• Added ARM64 Windows binaries.
• Changed the build and the repository structure.
• Changed the module path to dbohdan.com/recur/v2.