Add nautilus-macros.m4

svn path=/trunk/; revision=1655

diff --git a/hack-macros/nautilus-macros.m4 b/hack-macros/nautilus-macros.m4
new file mode 100644 (file)
index 0000000..5c4e0f6
--- /dev/null
+++ b/hack-macros/nautilus-macros.m4
@@ -0,0 +1,56 @@
+dnl
+dnl NAUTILUS_VERSION_CANON(version)
+dnl                     1
+AC_DEFUN(NAUTILUS_VERSION_CANON, [`
+
+       dnl Assumes that there are no more than 999 revisions at a level,
+       dnl no more than three levels of revision.
+       dnl
+       dnl Any more than that, and test starts messing up the numeric
+       dnl comparisons because its integers overflow, and there's no
+       dnl way to do string comparisons in the shell.  Grr.
+       dnl
+       dnl Must come up with some way to fix this.
+
+       echo "$1" |
+       tr . '\012' |
+       sed -e 's/^/000/' -e 's/^.*\(...\)/\1/' |
+       tr -d '\012' |
+       sed 's/$/000000000/
+            s/^\(.........\).*/\1/'
+`])
+
+dnl NAUTILUS_VERSION_INSIST(package, get-version-cmd, operator, want-version-var)
+dnl                      1        2                3         4
+
+AC_DEFUN(NAUTILUS_VERSION_INSIST, [
+       ez_want_version=[$]$4
+
+       case "$3" in
+               ">")    ez_operator=-gt ;;
+               ">=")   ez_operator=-ge ;;
+               "<")    ez_operator=-lt ;;
+               "<=")   ez_operator=-le ;;
+               "=")    ez_operator=-eq ;;
+               "!=")   ez_operator=-ne ;;
+               *)      AC_ERROR(Unknown operator $3 in configure script) ;;
+       esac
+
+       AC_MSG_CHECKING(for $1 $3 [$ez_want_version])
+
+       if ez_installed_version="`$2`"
+       then
+               AC_MSG_RESULT([$ez_installed_version])
+       else
+               AC_ERROR($2 failed)
+       fi
+
+       if test "NAUTILUS_VERSION_CANON([$ez_installed_version])" "$ez_operator" \
+               "NAUTILUS_VERSION_CANON([$ez_want_version])"
+       then
+               :
+               AC_SUBST($4)
+       else
+               AC_ERROR($1 version [$ez_want_version] is required.)
+       fi
+])