xbps-src: abstract away non-portable stat(1)

This implements semi-portable abstractions for both GNU and BSD
flavors of stat.

common/xbps-src/shutils/common.sh

@@ -1,5 +1,41 @@
 # vim: set ts=4 sw=4 et:
 
+# A portable abstraction for stat(1)
+#
+# The stat(1) command has different syntaxes between GNU flavor
+# and BSD flavor; implementations generally follow one or the other
+#
+if ! stat -c "%s" / > /dev/null 2>&1; then
+    # BSD stat
+
+    stat_size() {
+        stat -f %z "$1"
+    }
+
+    stat_inode() {
+        stat -f %i "$1"
+    }
+
+    stat_mtime() {
+        stat -f %m "$1"
+    }
+else
+    # GNU stat
+
+    stat_size() {
+        stat -c %s "$1"
+    }
+
+    stat_inode() {
+        stat -c %i "$1"
+    }
+
+    stat_mtime() {
+        stat -c %Y "$1"
+    }
+fi
+
+
 run_func() {
     local func="$1" desc="$2" funcname="$3" restoretrap= logpipe= logfile= teepid=
 

common/xbps-src/shutils/cross.sh

@@ -16,7 +16,7 @@ remove_pkg_cross_deps() {
     $XBPS_REMOVE_XCMD -Ryo > $tmplogf 2>&1
     rval=$?
     while [ $rval -eq 0 ]; do
-        local curs=$(stat -c %s $tmplogf)
+        local curs=$(stat_size $tmplogf)
         if [ $curs -eq $prevs ]; then
             break
         fi

common/xbps-src/shutils/pkgtarget.sh

@@ -65,11 +65,11 @@ remove_pkg_autodeps() {
 
     remove_pkg_cross_deps
     $XBPS_RECONFIGURE_CMD -a >> $tmplogf 2>&1
-    prevs=$(stat -c %s $tmplogf)
+    prevs=$(stat_size $tmplogf)
     echo yes | $XBPS_REMOVE_CMD -Ryod 2>> $errlogf 1>> $tmplogf
     rval=$?
     while [ $rval -eq 0 ]; do
-        local curs=$(stat -c %s $tmplogf)
+        local curs=$(stat_size $tmplogf)
         if [ $curs -eq $prevs ]; then
             break
         fi

common/xbps-src/shutils/purge_distfiles.sh

@@ -57,7 +57,7 @@ purge_distfiles() {
 	cur=0
 	percent=-1
 	for distfile in ${distfiles[@]}; do
-		inode=$(stat "$distfile" --printf "%i")
+		inode=$(stat_inode "$distfile")
 		if [ -z "${inodes[$inode]}" ]; then
 			inodes[$inode]="$distfile"
 		else
@@ -77,7 +77,7 @@ purge_distfiles() {
 		hash_distfile=${file##*/}
 		hash=${hash_distfile:0:$HASHLEN}
 		[ -n "${my_hashes[$hash]}" ] && continue
-		inode=$(stat "$file" --printf "%i")
+		inode=$(stat_inode "$file")
 		echo "Obsolete $hash (inode: $inode)"
 		( IFS="|"; for f in ${inodes[$inode]}; do rm -vf "$f"; rmdir "${f%/*}" 2>/dev/null; done )
 	done