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Fix -n flag to show line numbers in loop-through mode

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When the -n/--number flag is passed on the command line, bat now shows
line numbers even when piping output to another process (loop-through
mode), similar to how `cat -n` behaves.

This change detects if -n or --number was passed on the CLI (before
merging with config file and environment variables) and disables
loop-through mode in that case, allowing the InteractivePrinter to
add line numbers.

The existing behavior is preserved:
- Styles from config/env are still ignored when piping (unless --decorations=always is set)
- Only the -n flag from CLI enables line numbers in piped mode
- -p and --style options from CLI do not disable loop-through mode
This commit is contained in:
Keith Hall
2025-11-29 17:21:37 +02:00
parent f9c33971d9
commit abc7261488
3 changed files with 28 additions and 3 deletions
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CHANGELOG.md
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@@ -9,7 +9,7 @@
- Fix hang when using `--list-themes` with an explicit pager, see #3457 (@abhinavcool42)
- Fix negative values of N not being parsed in <N:M> line ranges without `=` flag value separator, see #3442 (@lmmx)
- Fix broken Docker syntax preventing use of custom assets, see #3476 (@keith-hall)
- Fix decorations being applied unexpectedly when piping, breaking cat compatibility. See #3496 (@keith-hall)
- Fix decorations being applied unexpectedly when piping. Now only line numbers explicitly required on the command line should be applied in auto decorations mode for `cat` compatibility. See #3496 (@keith-hall)
## Other
- Improve README documentation on pager options passed to less, see #3443 (@injust)