[arch-releng] Opinions about adding lzo support to mkarchiso

[Gerardo Exequiel Pozzi]

  Hello

Aaron, Dieter, Thomas: Next Linux 2.6.36 [#1] will support squashfs with 
lzo compression, and we need newer squashfs-tools 4.1 (officially 
supported) with lzo enabled (changes needed to PKGBUILD here [#2]).

I added a parameter -c to mkarchiso that can select between gzip 
(default) and lzo. What do you think about adding lzo support to 
mkarchiso, this should be enabled by default? Or just keep mkarchiso 
with gzip as default then in "syslinux-iso" profile enable lzo.

I did not make any tests at this moment I will wait for 2.6.36 package 
become ready.

Thanks for your time.

[#1] 
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=79cb8ced7eef53856b5a877db0544acf52e00c80
[#2] https://bugs.archlinux.org/task/20986

Adding an "informal" patch just for RFC.


--- a/archiso/mkarchiso
+++ b/archiso/mkarchiso
@@ -7,6 +7,7 @@ PACCONFIG="/etc/pacman.conf"
  export LABEL="ARCH_$(date +%Y%m)"
  PUBLISHER="Arch Linux <http://www.archlinux.org>"
  APPLICATION="Arch Linux Live/Rescue CD"
+COMPRESSION="gzip"
  CREATE_DEFAULT="n"

  APPNAME=$(basename "${0}")
@@ -22,6 +23,7 @@ usage ()
      echo "    -L <label>       Set a label for the disk"
      echo "    -P <publisher>   Set a publisher for the disk"
      echo "    -A <application> Set an application name for the disk"
+    echo "    -c <compressor>  Set compression type: 'gzip' (default) 
or 'lzo'"
      echo "    -d               Create default user directory /home/arch"
      echo "    -v               Enable verbose output"
      echo "    -h               This message"
@@ -34,13 +36,14 @@ usage ()
      exit $1
  }

-while getopts 'p:C:L:P:A:dfvh' arg; do
+while getopts 'p:C:L:P:A:cdfvh' arg; do
      case "${arg}" in
          p) PKGLIST="${PKGLIST} ${OPTARG}" ;;
          C) PACCONFIG="${OPTARG}" ;;
-       L) LABEL="${OPTARG}" ;;
-       P) PUBLISHER="${OPTARG}" ;;
-       A) APPLICATION="${OPTARG}" ;;
+        L) LABEL="${OPTARG}" ;;
+        P) PUBLISHER="${OPTARG}" ;;
+        A) APPLICATION="${OPTARG}" ;;
+        c) COMPRESSION="${OPTARG}" ;;
          d) CREATE_DEFAULT="y" ;;
          f) FORCE="y" ;;
          v) QUIET="n" ;;
@@ -187,9 +190,9 @@ _mksquash () {
      echo "Creating SquashFS image. This may take some time..."
      start=$(date +%s)
      if [ "${QUIET}" = "y" ]; then
-        mksquashfs "${1}" "${sqimg}" -noappend >/dev/null
+        mksquashfs "${1}" "${sqimg}" -noappend -comp ${COMPRESSION} 
 >/dev/null
      else
-        mksquashfs "${1}" "${sqimg}" -noappend
+        mksquashfs "${1}" "${sqimg}" -noappend -comp ${COMPRESSION}
      fi
      minutes=$(echo $start $(date +%s) | awk '{ printf 
"%0.2f",($2-$1)/60 }')
      echo "Image creation done in $minutes minutes."


-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1