git-extra: avoid forcing LDAP query by editing nsswitch.conf

With certain nsswitch.conf settings, Cygwin/MSys2 is forced to query the
ActiveDirectory (LDAP). By commenting out those settings, we avoid that.

As reported by Jeremy Kolb, this query can lead to dozens of seconds
delay upon starting the Git Bash.

This fixes git-for-windows/git#193.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

git-extra/git-extra.install.in

@@ -11,7 +11,15 @@ GITCONFIG
 	done
 
 	grep -q '^db_home: env windows' /etc/nsswitch.conf ||
-	sed -i 's/^\(db_\(home\|shell\|gecos\): \)\(windows \)\?\([^w]\)/\1env windows \4/' \
+	sed -i 's/^\(db_home: \)\(windows \)\?\([^w]\)/\1env windows \3/' \
+		/etc/nsswitch.conf
+
+	! grep -q '^db_shell: [^#]*cygwin' /etc/nsswitch.conf ||
+	sed -i 's/^\(db_shell: \)\(env \)\?\(windows \)\?/\1env windows # /' \
+		/etc/nsswitch.conf
+
+	! grep -q '^db_gecos: [^#]*\(cygwin\|windows\)' /etc/nsswitch.conf ||
+	sed -i 's/^\(db_gecos: \)\(env \)\?\([^e]\)/\1env # \3/' \
 		/etc/nsswitch.conf
 
 	! grep -q '^PS1=' /etc/bash.bashrc ||