mc-wrapper: fish shenanigans

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>

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