Add `set -e` to build script

To ensure that the build stops after build errors. Also fixed
several minor issues in the script to ensure that the build process
mostly runs successfully with and doesn't break due to file operations
when preparing the build env.

1 files changed, 5 insertions, 6 deletions

diff --git a/kernel/build.sh b/kernel/build.sh
index 9d48229..a128366 100755
--- a/kernel/build.sh
+++ b/kernel/build.sh
@@ -1,4 +1,5 @@
 #! /usr/bin/env bash
+set -e
 
 ASM_PATH="src/"
 TARGET_PATH="target"
@@ -20,12 +21,12 @@ cleanup_target() {
 }
 
 create_target() {
-    mkdir $TARGET_PATH &> /dev/null
-    mkdir $TMP_PATH &> /dev/null
+    mkdir -p $TARGET_PATH
+    mkdir -p $TMP_PATH
 }
 
 cleanup_temp() {
-    rm -f $TMP_PATH/* &> /dev/null
+    rm -r $TMP_PATH/* &>/dev/null ||:
 }
 
 # ---------------------------------------------------
@@ -44,9 +45,7 @@ build_kernel_iso() {
         build_kernel_elf
     fi
     create_target
-    mkdir $TMP_PATH/isofiles &> /dev/null
-    mkdir $TMP_PATH/isofiles/boot &> /dev/null
-    mkdir $TMP_PATH/isofiles/boot/grub &> /dev/null
+    mkdir -p $TMP_PATH/isofiles/boot/grub
     cp $TARGET_PATH/kernel.bin $TMP_PATH/isofiles/boot &> /dev/null
     cp $GRUB_CFG_PATH $TMP_PATH/isofiles/boot/grub/grub.cfg &> /dev/null
     [ -d "$GRUB_i386" ] || { echo "Grub img $GRUB_i386 does not exist!"; exit 1; }