treewide: replace `which` with `command -v`

Fix shellcheck SC2230
> which is non-standard. Use builtin 'command -v' instead.

Using `command -v` is POSIX compliant while `which` is not.  Also to
mention, `command -v` is a shell builtin whereas `which` is a separate
busybox applet.

Once applied to everything concerning OpenWrt we can disable the busybox
feature `which` and save 3.8kB.

Acked-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Paul Spooren <mail@aparcar.org>
[also replace cases in zram-swap]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 6 insertions, 6 deletions

diff --git a/scripts/ipkg-build b/scripts/ipkg-build
index 21127f3391..6e027bc546 100755
--- a/scripts/ipkg-build
+++ b/scripts/ipkg-build
@@ -10,10 +10,10 @@
 set -e
 
 version=1.0
-FIND="$(which find)"
-FIND="${FIND:-$(which gfind)}"
-TAR="${TAR:-$(which tar)}"
-GZIP="$(which gzip)"
+FIND="$(command -v find)"
+FIND="${FIND:-$(command -v gfind)}"
+TAR="${TAR:-$(command -v tar)}"
+GZIP="$(command -v gzip)"
 
 # try to use fixed source epoch
 if [ -n "$SOURCE_DATE_EPOCH" ]; then
@@ -21,10 +21,10 @@ if [ -n "$SOURCE_DATE_EPOCH" ]; then
 
 # look up date of last commit
 elif [ -d "$TOPDIR/.git" ]; then
-	GIT="$(which git)"
+	GIT="$(command -v git)"
 	TIMESTAMP=$(cd $TOPDIR; $GIT log -1 -s --format=%ci)
 elif [ -d "$TOPDIR/.svn" ]; then
-	SVN="$(which svn)"
+	SVN="$(command -v svn)"
 	TIMESTAMP=$($SVN info "$TOPDIR" | sed -n "s/^Last Changed Date: \(.*\)/\1/p")
 else
 	TIMESTAMP=$(date)