auto-meson-pc-cmp.sh

   1 #!/bin/sh
   2 # Compare semantically pc files between two dirs, with same relative
   3 # pathnames, say one generated by autotools, the other one generated
   4 # by meson, by not requesting lexical identity but by
   5 # checking that the same vars are available, and that they eventually
   6 # have the same definition, whatever way (with whatever pkconf
   7 # variable) they have been expressed.
   8 #
   9 # Copyright 2024 Thierry LARONDE <tlaronde@kergis.com>
  10 # SPDX-License-Identifier: MIT
  11
  12 # Pc file paths have to be given fully qualified to be independent
  13 # from PKG_CONFIG_LIBDIR and PKG_CONFIG_PATH definition.
  14 #
  15 test $# -eq 2 && test -d "$1" && test -d "$2"\
  16         && test "${1#/}" != "$1" && test "${2#/}" != "$2" || {
  17         echo "Usage: $(basename $0) fqdir1 fqdir2" >&2
  18         exit 1
  19 }
  20
  21 : ${TMPDIR:=/tmp}
  22
  23 log() {
  24         printf "$@" >&2
  25 }
  26
  27 cleantmp() {
  28         rm "$TMPDIR"/$$.*
  29 }
  30
  31 dir1="$1"
  32 dir2="$2"
  33
  34 # Start by simply comparing the list of pc files between the two dirs.
  35 #
  36 (cd "$dir1"; find . -type f -name "*.pc") | sort > "$TMPDIR/$$.1"
  37 (cd "$dir2"; find . -type f -name "*.pc") | sort > "$TMPDIR/$$.2"
  38 cmp "$TMPDIR/$$.1" "$TMPDIR/$$.2" 2>/dev/null || {
  39         log "Pc files not matching between %s and %s:\n" "$dir1" "$dir2"
  40         diff -u "$TMPDIR/$$.1" "$TMPDIR/$$.2" >&2
  41         cleantmp
  42         exit 1
  43 }
  44
  45 status=0
  46 while read pcfile; do
  47         pcfile=${pcfile#./}
  48         ifile=0
  49         for pc in "$dir1/$pcfile" "$dir2/$pcfile"; do
  50                 ifile=$(($ifile + 1))
  51                 pkgconf --print-variables "$pc"\
  52                         | sort\
  53                         | while read var; do
  54                                 test "$var" != "pcfiledir" || continue
  55                                 pkgconf --variable=$var "$pc"\
  56                                         | sed "s!^!$var=!"
  57                         done >"$TMPDIR/$$.pc$ifile"
  58         done
  59         if ! cmp "$TMPDIR/$$.pc1" "$TMPDIR/$$.pc2" 2>/dev/null; then
  60                 log "!!! %s generated files differ:\n" "$pcfile"
  61                 diff -U0 "$TMPDIR/$$.pc1" "$TMPDIR/$$.pc2" >&2
  62                 status=$(($status + 1))
  63         fi
  64 done  <"$TMPDIR/$$.1"
  65
  66 cleantmp
  67 if test "$status" -ne 0; then
  68         log "%d pc files in %s and %s differ semantically.\n" "$status" "$dir1" "$dir2"
  69         exit 1
  70 else
  71         exit 0
  72 fi