Ticket #4726: add mc-wrapper for FISH

Fish is increasingly growing popularity, and has gained a lot of new interest
after 4.0 version was released.

There is obviously high chance that bunch of them are mc users, and would like
to continue that trend also as fish users.

Based on these observations, add mc-wrapper shenanigans for fish.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@iki.fi>
Signed-off-by: Yury V. Zaytsev <yury@shurup.com>

Author: jarkkojs

contrib/Makefile.am

@@ -29,3 +29,5 @@ mc-wrapper.csh: $(top_builddir)/config.status $(srcdir)/mc-wrapper.csh.in
 mc-wrapper.sh: $(top_builddir)/config.status $(srcdir)/mc-wrapper.sh.in
 	$(SED) "s%@""bindir@%$(bindir)%" $(srcdir)/mc-wrapper.sh.in > mc-wrapper.sh
 
+mc-wrapper.sh: $(top_builddir)/config.status $(srcdir)/mc-wrapper.fish.in
+	$(SED) "s%@""bindir@%$(bindir)%" $(srcdir)/mc-wrapper.fish.in > mc-wrapper.fish

contrib/mc-wrapper.fish.in

@@ -0,0 +1,20 @@
+if set -q MC_TMPDIR
+	set MC_PWD_FILE (mktemp "$MC_TMPDIR/mc.pwd.XXXXXX")
+else if set -q TMPDIR
+	set MC_PWD_FILE (mktemp "$TMPDIR/mc.pwd.XXXXXX")
+else
+	set MC_PWD_FILE (mktemp "/tmp/mc.pwd.XXXXXX")
+end
+
+@bindir@/mc -P "$MC_PWD_FILE" "$argv"
+
+if test -r "$MC_PWD_FILE"
+	set MC_PWD (cat $MC_PWD_FILE)
+	if test -n "$MC_PWD" && test "$MC_PWD" != "$PWD" && test -d "$MC_PWD"
+		cd "$MC_PWD"
+	end
+	set -e MC_PWD
+end
+
+rm -f "$MC_PWD_FILE"
+set -e MC_PWD_FILE