add buildroot script

linux/buildroot-scripts/start-buildroot-session.sh

@@ -0,0 +1,80 @@
+script_dir=$(readlink -f ./)
+personal_config=$(readlink -f ../buildroot-config-src)
+shared_config=$RISCV/buildroot-config-src
+
+if [ -d "$shared_config" ]; then
+    echo "Hold the horses, friend!" >&2
+    echo "There is already a buildroot-config-src folder in \$RISCV" >&2
+    if [ ! -f "$shared_config/.owner" ]; then
+        echo "Oy vey -- it was improperly created too!" >&2
+        echo "I see no .owner file in it!" >&2
+        echo "Maybe just delete it." >&2
+        exit 1
+    fi
+    owner=$(cat $shared_config/.owner)
+    echo "It was created by $owner." >&2
+    echo "Please contact them before overwriting their source files." >&2
+    exit 1
+fi
+echo "Starting new buildroot session"
+# Copy configs to shared location
+echo "Elevate permissions to copy ../buildroot-config-src to \$RISCV"
+sudo cp -r "$personal_config" "$shared_config"
+sudo chown -R cad $shared_config
+# Document who created these configs
+whoami>.owner
+sudo mv .owner $shared_config
+# Copy over main.config
+echo "Copying main.config to buildroot/.config."
+sudo cp $shared_config/main.config $RISCV/buildroot/.config
+sudo chown cad $RISCV/buildroot/.config
+
+echo "=============================================="
+echo "I'm about to sign you in as cad."
+echo ""
+echo "You can go straight to the \$RISCV/buildroot"
+echo "and run \`make\` if you want."
+echo ""
+echo "You can also run:"
+echo "  * \`make menu-config\`"
+echo "  * \`make linux-menuconfig\`"
+echo "  * \`make busybox-menuconfig\`"
+echo "but if you do, you have to make extra certain" 
+echo "that you LOAD and SAVE configs from/to "
+echo "\$RISCV/buildroot-config-src."
+echo ""
+echo "Run \`exit\` to sign out when you are done."
+echo "And then any configs that were modified in"
+echo "\$RISCV/buildroot-config-src will be copied"
+echo "back to ../buildroot-config-src."
+echo "=============================================="
+read -p "Press any key to sign in as cad" -n1 -s
+echo ""
+cd $RISCV
+sudo su cad
+cd $script_dir
+
+echo ""
+echo "Ending buildroot session"
+if [ ! -d "$shared_config" ]; then
+    echo "Warning: $shared_config has already been deleted."
+    exit 0
+fi
+if [ ! -f "$shared_config/.owner" ]; then
+    echo "Oy vey -- no .owner file found.">&2
+    echo "Not sure whether to delete $shared_config.">&2
+    exit 1
+fi
+owner=$(cat "$shared_config"/.owner)
+if [ $owner != $(whoami) ]; then
+    echo "Whoah there! It seems $owner created $shared_config.">&2
+    echo "Ask them before deleting their work.">&2
+    exit 1
+fi
+echo "Copying modified configs from \$RISCV/buildroot-config-src back to ../buildroot-config-src."
+for file in $personal_config/*; do
+    file=$(basename $file)
+    cp $shared_config/$file $personal_config/$file
+done
+echo "Elevate permissions to remove personal configs from shared location."
+sudo rm -r $shared_config