[bug #58016] Add an option "--label=<name>" to show an origin of diagnostics

[Bjarni Ingi Gislason]

URL:
  <https://savannah.gnu.org/bugs/?58016>

                 Summary: Add an option "--label=<name>" to show an origin of
diagnostics
                 Project: GNU troff
            Submitted by: bjarniig
            Submitted on: Sat 21 Mar 2020 07:12:14 PM UTC
                Category: Core
                Severity: 3 - Normal
              Item Group: New feature
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None

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Details:

Subject: Add an option "--label=<name>" to show an origin of diagnostics

  "groff" has sometimes to read the standard input.
 In that case diagnostics are output with a "stdin" or
 a "<standard input>" label.

  If more than one file is processed in one run,
 one can't see from which file the output is.

  This is for example the case in Makefiles.

  "grep" has such a label.
 Its explanation is

 --label=LABEL
        Display input actually coming from standard input as input
        coming from file LABEL.  This is especially useful when
        implementing tools like zgrep, e.g., gzip -cd foo.gz | grep
        --label=foo -H something.  See also the -H option.

  "diff" (same as '-L') and "diff3" have this option.





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