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75adbf40ca
The new `--error-style` option decides how build failures are printed. The default mode "verbose" prints all context including the step graph fragment and the failed command (if any). The alternative mode "minimal" prints only the failed step itself, and does not print the failed command. There are also "verbose_clear" and "minimal_clear" modes, which have the distinction that the output is cleared (through ANSI escape codes) between updates, preventing different updates from being confused in the output. If `--error-style` is not specified, the environment variable `ZIG_BUILD_ERROR_STYLE` is checked before falling back to the default of "verbose"; this means the value can effectively be chosen system-wide since it is generally a personal preference. Also introduced is a `--multiline-errors` option which decides how to print errors which span multiple lines. By default, non-initial lines are indented to align with the first. Alternatively, a leading newline can be printed to align everyting on the first column, or no special treatment can be applied, resulting in misaligned output. Again, there is an environment variable (`ZIG_BUILD_MULTILINE_ERRORS`) to specify a preferred default if the option is not explicitly provided. Resolves: #23472