make.sh: Refactor determining BASEDIR

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/make.sh b/make.sh
index d3750be61a15c34e959a34583e35cee971878d22..cdc76fc9ff6f6816def278993a52125a395e67d2 100755 (executable)
--- a/make.sh
+++ b/make.sh
@@ -64,7 +64,6 @@ NORMAL="\\033[0;39m"
 HOST_ARCH="$(uname -m)"
 
 PWD=$(pwd)
-BASENAME=$(basename $0)
 
 # Sets or adjusts pretty formatting variables
 resize_terminal() {
@@ -94,6 +93,27 @@ resize_terminal
 # Call resize_terminal when terminal is being resized
 trap "resize_terminal" WINCH
 
+find_base() {
+       local path
+
+       # Figure out the absolute script path using readlink
+       path="$(readlink -f "${0}" 2>&1)"
+
+       # If that failed, try realpath
+       if [ -z "${path}" ]; then
+               path="$(realpath "${0}" 2>&1)"
+       fi
+
+       # If that failed, I am out of ideas
+       if [ -z "${path}" ]; then
+               echo "${0}: Could not determine BASEDIR" >&2
+               return 1
+       fi
+
+       # Return the dirname
+       dirname "${path}"
+}
+
 system_processors() {
        getconf _NPROCESSORS_ONLN 2>/dev/null || echo "1"
 }
@@ -1816,20 +1836,8 @@ exec_in_namespace() {
                "${0}" "$@"
 }
 
-# Debian specific settings
-if [ ! -e /etc/debian_version ]; then
-       FULLPATH=`which $0`
-else
-       if [ -x /usr/bin/realpath ]; then
-               FULLPATH=`/usr/bin/realpath $0`
-       else
-               echo "ERROR: Need to do apt-get install realpath"
-               exit 1
-       fi
-fi
-
-# This is the directory where make.sh is in
-export BASEDIR=$(echo $FULLPATH | sed "s/\/$BASENAME//g")
+# Set BASEDIR
+readonly BASEDIR="$(find_base)"
 
 LOGFILE=$BASEDIR/log/_build.preparation.log
 export LOGFILE