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add autosizer source, modified README

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Sylvain 2015-12-15 17:54:43 +01:00
parent df49b0d168
commit c65b9daf1f
2 changed files with 28 additions and 13 deletions
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19
build_arm_image/README.md
View file

@ -1,7 +1,18 @@
This folder contains helper script to build arm image for raspberry and derivative arm plateform.
This folder contains helper scripts to build an arm image for raspberry.
The files here are for builder. They are not needed to install yunohost.
the folder structure maps debian OS folders.
The folder structure maps debian OS folders, shell script here are helpers.
files are copied to the /root when finished.
The files are copied on the sdcard when installation is finished.
See also: https://yunohost.org/#/build_arm_image
See also: https://yunohost.org/#/build_arm_image for previous step.
run the following script before shuting down your rasbian.
~~~
./intsall_arm.sh
~~~
autosizer.sh is used on your PC to compact the dd image you will copy back.
this script requier root privilege to run and modify the sdcard image.

22
build_arm_image/autosizer.sh
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@ -1,6 +1,9 @@
#!/bin/bash
# Automatic Image file resizer
# Written by SirLagz
#
# got from: http://sirlagz.net/2013/03/10/script-automatic-rpi-image-downsizer/
strImgFile=$1
if [[ ! $(whoami) =~ "root" ]]; then
@ -12,20 +15,20 @@ if [[ ! $(whoami) =~ "root" ]]; then
exit
fi
if [[ -z $1 ]]; then
if [[ -z $strImgFile ]]; then
echo "Usage: ./autosizer.sh <Image File>"
exit
fi
if [[ ! -e $1 || ! $(file $1) =~ "x86" ]]; then
if [[ ! -e $strImgFile || ! $(file $strImgFile) =~ "x86" ]]; then
echo "Error : Not an image file, or file doesn't exist"
exit
fi
partinfo=`parted -m $1 unit B print`
partnumber=`echo "$partinfo" | grep ext4 | awk -F: ' { print $1 } '`
partinfo=`parted -m $strImgFile unit B print`
partnumber=`echo "$partinfo" | grep ext4 | awk -F: ' { print $strImgFile } '`
partstart=`echo "$partinfo" | grep ext4 | awk -F: ' { print substr($2,0,length($2)-1) } '`
loopback=`losetup -f --show -o $partstart $1`
loopback=`losetup -f --show -o $partstart $strImgFile`
e2fsck -f $loopback
minsize=`resize2fs -P $loopback | awk -F': ' ' { print $2 } '`
minsize=`echo $minsize+1000 | bc`
@ -34,7 +37,8 @@ sleep 1
losetup -d $loopback
partnewsize=`echo "$minsize * 4096" | bc`
newpartend=`echo "$partstart + $partnewsize" | bc`
part1=`parted $1 rm 2`
part2=`parted $1 unit B mkpart primary $partstart $newpartend`
endresult=`parted -m $1 unit B print free | tail -1 | awk -F: ' { print substr($2,0,length($2)-1) } '`
truncate -s $endresult $1
# TODO: 2 is probably $partnumber
part1=`parted $strImgFile rm 2`
part2=`parted $strImgFile unit B mkpart primary $partstart $newpartend`
endresult=`parted -m $strImgFile unit B print free | tail -1 | awk -F: ' { print substr($2,0,length($2)-1) } '`
truncate -s $endresult $strImgFile