[bug #57630] test-groff clobbers environment's GROFF_*_PATH variables

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?57630>

                 Summary: test-groff clobbers environment's GROFF_*_PATH
variables
                 Project: GNU troff
            Submitted by: barx
            Submitted on: Sat 18 Jan 2020 10:39:28 PM CST
                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:

The test-groff script simulates an installation by defining its own
GROFF_BIN_PATH, GROFF_FONT_PATH, and GROFF_TMAC_PATH values pointing to the
build directory.

Unfortunately, instead of appending to any existing values of these variables,
it overwrites them, so the user's environment is ignored.

For this script to more closely emulate running an installed groff, it should
prepend any existing values to the ones it defines.  This would make it treat
these variables the way a groff installation would, searching the user's
environment (if any) first, then the "system" one.

For example:


if [ "$GROFF_FONT_PATH" ]
then
  GROFF_FONT_PATH="$GROFF_FONT_PATH$SEP"
fi

GROFF_FONT_PATH=$GROFF_FONT_PATH\
[... rest of script's normal definition for this variable ...]





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