Test for executables: replace 'which' with more robust 'command -v'

Instances of:
if [ $(which <command> ]
have been replaced with:
if command -v <command> >/dev/null
which is considered to be more robust in a range of environments.

scripts/build/chroot_archives: line 259:
	if [ "${LB_APT}" = "aptitude" ] && [ ! $(Chroot chroot "which aptitude") ]
has been left untouched because the chroot might require a more complex command
which would need more testing.

manpages/Makefile: line 42:
	@if [ ! -x "$$(which po4a 2>/dev/null)" ]; \
has been left untouched because I am not sufficiently familiar with makefiles.

1 files changed, 1 insertions, 1 deletions

diff --git a/frontend/live-build b/frontend/live-build
index 29efec9cf..2980158c0 100755
--- a/frontend/live-build
+++ b/frontend/live-build
@@ -23,7 +23,7 @@
 
 set -e
 
-if [ $(which man) ]
+if command -v man >/dev/null
 then
 	man live-build
 else