CRYSTAL-TOOL-MACRO_CODE_COVERAGE(1) Crystal Compiler Command Line Reference Guide CRYSTAL-TOOL-MACRO_CODE_COVERAGE(1)

crystal-tool-macro_code_coverage - generate a macro code coverage report.

crystal tool macro_code_coverage [options] [programfile]

Generate and output a macro code coverage report to STDERR. Any exception raised while computing the report is written to STDOUT.

-D FLAG, --define=FLAG

Define a compile-time flag. This is useful to con ditionally define types, methods, or commands based on flags available at compile time. The default flags are from the target triple given with --tar get-triple or the hosts default, if none is given.

-f FORMAT, --format=FORMAT

Output format 'codecov' (default).

-i PATH, --include=PATH

Include path in output.

-e PATH, --exclude=PATH

Exclude path in output (default: lib).

--error-trace

Show full error trace.

--prelude

Specify prelude to use. The default one initializes the garbage collector. You can also use --pre lude=empty to use no preludes. This can be useful for checking code generation for a specific source code file.

-s, --stats

Print statistics about the different compiler stages for the current build. Output time and used memory for each compiler process.

-p, --progress

Print statistics about the progress for the current build.

-t, --time

Print statistics about the execution time.

--no-color

Disable colored output.
2026-07-23 crystal 1.21.0