From 43dd92024ab54921fbf85285d04344cb2c6e77cc Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Mon, 2 Sep 2013 23:03:03 +0200 Subject: union: Don't traverse sub-directories only found in one element of the union. This significantly reduces I/O when building profiles, especially with lots of package-specific sub-directories (such as 'share/emacs/24.3', 'texmf', etc.) * guix/build/union.scm (union-build)[file-tree](others-have-it?): New procedure. Use it in the 'enter?' parameter of 'file-system-fold'; change 'skip' parameter accordingly. * tests/union.scm ("union-build"): Ensure that 'include' is a symlink and 'bin' is a directory. --- tests/union.scm | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'tests/union.scm') diff --git a/tests/union.scm b/tests/union.scm index 9816882101..6287cffc38 100644 --- a/tests/union.scm +++ b/tests/union.scm @@ -114,7 +114,17 @@ (file-exists? "bin/ld") (file-exists? "lib/libc.so") (directory-exists? "lib/gcc") - (file-exists? "include/unistd.h")))))) + (file-exists? "include/unistd.h") + + ;; The 'include' sub-directory is only found in + ;; glibc-bootstrap, so it should be unified in a + ;; straightforward way, without traversing it. + (eq? 'symlink (stat:type (lstat "include"))) + + ;; Conversely, several inputs have a 'bin' sub-directory, so + ;; unifying it requires traversing them all, and creating a + ;; new 'bin' sub-directory in the profile. + (eq? 'directory (stat:type (lstat "bin")))))))) (test-end) -- cgit 1.4.1