xargs: add --show-limits diagnostics#686
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## main #686 +/- ##
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+ Coverage 91.85% 91.86% +0.01%
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Lines 6420 6454 +34
Branches 338 340 +2
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Among other things, Debian maintainers use the output of xargs --show-limits to set --max-chars appropriately for subsequent commands. Accept GNU-compatible --show-limits and print command-line size diagnostics before reading input or building a command. The output includes the Maximum length line parsed by Debian maintainer scripts. The regression test links to Debian python3.13's libPVER-minimal.prerm.in, where 3.13.5-2+deb13u2 parses xargs --show-limits, and to GNU findutils 4.10.0's xargs/xargs.c, where the diagnostic text is emitted. Reuse the existing system command-size calculation for both the default limiter and the diagnostic output, and add an integration test for the parsed limit.
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Among other things, Debian maintainers use the output of xargs --show-limits to set --max-chars appropriately for subsequent commands.
Accept GNU-compatible --show-limits and print command-line size diagnostics before reading input or building a command. The output includes the Maximum length line parsed by Debian maintainer scripts.
The regression test links to Debian python3.13's
libPVER-minimal.prerm.in, where 3.13.5-2+deb13u2 parses xargs --show-limits, and to GNU findutils 4.10.0's xargs/xargs.c, where the diagnostic text is emitted.
Reuse the existing system command-size calculation for both the default limiter and the diagnostic output, and add an integration test for the parsed limit.