Documentation/sphinx/parallel-wrapper.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0+
   3 #
   4 # Figure out if we should follow a specific parallelism from the make
   5 # environment (as exported by scripts/jobserver-exec), or fall back to
   6 # the "auto" parallelism when "-jN" is not specified at the top-level
   7 # "make" invocation.
   8
   9 sphinx="$1"
  10 shift || true
  11
  12 parallel="$PARALLELISM"
  13 if [ -z "$parallel" ] ; then
  14         # If no parallelism is specified at the top-level make, then
  15         # fall back to the expected "-jauto" mode that the "htmldocs"
  16         # target has had.
  17         auto=$(perl -e 'open IN,"'"$sphinx"' --version 2>&1 |";
  18                         while (<IN>) {
  19                                 if (m/([\d\.]+)/) {
  20                                         print "auto" if ($1 >= "1.7")
  21                                 }
  22                         }
  23                         close IN')
  24         if [ -n "$auto" ] ; then
  25                 parallel="$auto"
  26         fi
  27 fi
  28 # Only if some parallelism has been determined do we add the -jN option.
  29 if [ -n "$parallel" ] ; then
  30         parallel="-j$parallel"
  31 fi
  32
  33 exec "$sphinx" $parallel "$@"