bash prompt: faster untracked status indicator with untracked directories

If the untracked status indicator is enabled, __git_ps1() looks for untracked files by running 'git ls-files'. This can be perceptibly slow in case of an untracked directory containing lot of files, because it lists all files found in the untracked directory only to be redirected into /dev/null right away (this is the actual command run by __git_ps1()): $ ls untracked-dir/ |wc -l 100000 $ time git ls-files --others --exclude-standard --error-unmatch \ -- ':/*' >/dev/null 2>/dev/null real 0m0.955s user 0m0.936s sys 0m0.016s Eliminate this delay by additionally passing the '--directory --no-empty-directory' options to 'git ls-files' to show only the name of non-empty untracked directories instead of all their content: $ time git ls-files --others --exclude-standard --directory \ --no-empty-directory --error-unmatch -- ':/*' >/dev/null 2>/dev/null real 0m0.010s user 0m0.008s sys 0m0.000s This follows suit of ea95c7b8f5 (completion: improve untracked directory filtering for filename completion, 2013-09-18). Signed-off-by: SZEDER Gábor <szeder@ira.uka.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>