1 files changed, 73 insertions, 47 deletions

diff --git a/src/xorriso-usb.sh b/src/xorriso-usb.sh
index a42764b..0adbb70 100644
--- a/src/xorriso-usb.sh
+++ b/src/xorriso-usb.sh
@@ -80,6 +80,74 @@ try_mount()
     mount -r "$1" /mnt && trap 'umount -l /mnt' EXIT
 }
 
+xorriso_cmd()
+{
+    # input variables:
+
+    # INPUT_DEVICE
+    # NEED_STDIO
+    # SILENT
+    # volid
+    # INPUT_DEVICE_COPIES
+    # REMOVE_BTRFS
+    # ADD_BTRFS
+    # vmlinuz_dir
+    # gpg_iso_path
+    # gnupghome
+    # efi_dir
+
+    # $@ = btrfs filesystems
+
+    ([ "$SHOW_CMD" ] && set -x;
+     ${NO_ACT:+ :} \
+        xorriso \
+            ${INPUT_DEVICE:+ -indev "$INPUT_DEVICE" } \
+            -outdev ${NEED_STDIO:+stdio:}"$outdev" \
+            -blank as_needed \
+            ${SILENT:+ -report_about mishap} \
+            -return_with sorry 0 \
+            -volid "$volid" \
+            -pathspecs on \
+            \
+            \
+            ${INPUT_DEVICE_COPIES} \
+            \
+            \
+            -rm_r linux -- -add linux="${vmlinuz_dir}" -- \
+            ${REMOVE_BTRFS:+   -rm_r rootfs -- } \
+            ${ADD_BTRFS:+      -follow link -add "$@" -- -follow default } \
+            \
+            \
+            -rm_r "${gpg_iso_path}" -- \
+            -add "${gpg_iso_path}=${gnupghome}" -- \
+            \
+            \
+            -chown_r 0 / -- \
+            -chgrp_r 0 / -- \
+            -chmod_r go-rwx "${gpg_iso_path}" -- \
+            \
+            \
+            -as mkisofs -graft-points \
+            -b grub/i386-pc/eltorito.img  \
+            -no-emul-boot -boot-info-table \
+            --embedded-boot "${efi_dir}"/embedded.img \
+            --protective-msdos-label \
+            grub="${efi_dir}"/grub
+    )
+}
+
+run_xorriso()
+{
+    xorriso_cmd "$@" || die "xorriso exited $?"
+
+    case "$outdev" in
+        *~) [ -f "$outdev" ] && mv "$outdev" "${outdev%\~}" ;;
+    esac
+
+    if [ "$USB" -a "$DETACH" -a $? = 0 ]; then
+        udisks --detach "$outdev"
+    fi
+}
 
 . samizdat-paths.sh || exit 1
 
@@ -158,12 +226,12 @@ fi
 if [ "$INPUT_DEVICE" ]; then
     if [ "$INPUT_DEVICE" = /dev/md55 ]; then
         if mountpoint -q /cdrom; then
-            XORRISO_IS_DRIVING_ME_INSANE='-add /=/cdrom --'
+            INPUT_DEVICE_COPIES='-add /=/cdrom --'
         fi
     elif [ -d "$INPUT_DEVICE" ]; then
-        XORRISO_IS_DRIVING_ME_INSANE="-add /=$INPUT_DEVICE --" # TODO: escape
+        INPUT_DEVICE_COPIES="-add /=$INPUT_DEVICE --" # TODO: escape
     elif try_mount "$INPUT_DEVICE"; then
-        XORRISO_IS_DRIVING_ME_INSANE='-add /=/mnt --'
+        INPUT_DEVICE_COPIES='-add /=/mnt --'
     else
         REPLACE_INITRD=
         REMOVE_BTRFS=
@@ -198,48 +266,6 @@ if [ "$REPLACE_INITRD" ]; then
 fi
 
 SILENT=
+SHOW_CMD=y
 
-(set -x
-xorriso \
-        ${INPUT_DEVICE:+ -indev "$INPUT_DEVICE" } \
-        -outdev ${NEED_STDIO:+stdio:}"$outdev" \
-        -blank as_needed \
-        ${SILENT:+ -report_about mishap} \
-        -return_with sorry 0 \
-        -volid "$volid" \
-        -pathspecs on \
-        \
-        \
-        ${XORRISO_IS_DRIVING_ME_INSANE} \
-        \
-        \
-        -rm_r linux -- -add linux="${vmlinuz_dir}" -- \
-        ${REMOVE_BTRFS:+   -rm_r rootfs -- } \
-        ${ADD_BTRFS:+      -follow link -add "$@" -- -follow default } \
-        \
-        \
-        -rm_r "${gpg_iso_path}" -- \
-        -add "${gpg_iso_path}=${gnupghome}" -- \
-        \
-        \
-        -chown_r 0 / -- \
-        -chgrp_r 0 / -- \
-        -chmod_r go-rwx "${gpg_iso_path}" -- \
-        \
-        \
-        -as mkisofs -graft-points \
-        -b grub/i386-pc/eltorito.img  \
-        -no-emul-boot -boot-info-table \
-        --embedded-boot "${efi_dir}"/embedded.img \
-        --protective-msdos-label \
-        grub="${efi_dir}"/grub
-
-) || die "xorriso exited $?"
-
-case "$outdev" in
-    *~) [ -f "$outdev" ] && mv "$outdev" "${outdev%\~}" ;;
-esac
-
-if [ "$USB" -a "$DETACH" -a $? = 0 ]; then
-    udisks --detach "$outdev"
-fi
+run_xorriso "$@"