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@calebccff
Last active Mar 7, 2022
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fastboot wrapper for flashing android images from a folder
#!/usr/bin/zsh
# Wrapper for common fastboot flash commands
# Example usage (as an alias)
# Assumes the device is running Android, syncs kernel modules (and whatever else)
# and then reboots and flashes the kernel
# $ alias aflashboot="adb remount && adb sync; aflash.sh -t -b"
#
# Flashes everything, from bootloader
# $ alias aflashall="aflash.sh -t -s -v -b"
usage() {
echo "Usage: $0 [OPTION]..."
echo " -p, --path path to outdir, default is \"$OUT\""
echo " -f, --format format userdata"
echo " -h, --help display this help and exit"
echo " -s, --system flash Android system partition"
echo " -b, --boot flash boot partition"
echo " -v, --vendor flash vendor partition"
echo " -u, --super flash super partition"
echo " -n, --no-reboot do not reboot after flashing"
echo " -t, --to-bootloader reboot device to bootloader"
}
# Get target state
# Possible return values:
# 'booted'
# 'bootloader'
# 'adb' (booted into Android)
# 'nc' (not connected)
at-state() {
if (ip a | grep -q 172.16.42.2); then
echo "booted"
return
elif [ "$(fastboot devices | wc -l)" -gt 0 ]; then
echo "bootloader"
return
elif [ "$(adb devices | wc -l)" -gt 2 ]; then
echo "adb"
return
fi
echo 'nc'
}
# Put the device in bootloader mode
# returns when the device is in bootlaoder
# mode
at-to_bootloader() {
state="$(at-state)"
while [ "$state" = "nc" ]; do
sleep 0.2
state="$(at-state)"
done
echo "Device in state: $state"
slot=""
if [ "$state" = "booted" ]; then
echo "Device is booted into Linux, please reboot manually"
elif [ "$state" = "adb" ]; then
adb reboot bootloader
fi
}
while getopts ":p:fhstbvun" opt; do
case $opt in
p)
images_path=$OPTARG
;;
f)
format=true
;;
h)
usage
exit 0
;;
s)
system=true
;;
b)
boot=true
;;
v)
vendor=true
;;
u)
super=true
;;
n)
no_reboot=true
;;
t)
to_bootloader=true
;;
\?)
echo "Invalid option: -$OPTARG" >&2
usage
exit 1
;;
:)
echo "Option -$OPTARG requires an argument." >&2
usage
exit 1
;;
esac
done
cmd="fastboot"
if [ -z "$cmd" ]; then
echo "fastboot not found"
exit 1
fi
if [ -z "$images_path" ]; then
images_path=$OUT
fi
if [ -z "$images_page" ]; then
images_page="$PWD"
fi
if [ ! -d "$images_path" ]; then
echo "Error: $images_path is not a directory"
exit 1
fi
if [ -z "$system" ]; then
system=false
elif [ ! -f "$images_path/system.img" ]; then
echo "Error: $images_path/system.img does not exist"
exit 1
else
cmd="$cmd flash system $images_path/system.img"
fi
if [ -z "$vendor" ]; then
vendor=false
elif [ ! -f "$images_path/vendor.img" ]; then
echo "Error: $images_path/vendor.img does not exist"
exit 1
else
cmd="$cmd flash vendor $images_path/vendor.img"
fi
if [ -z "$super" ]; then
super=false
elif [ ! -f "$images_path/super.img" ]; then
echo "Error: $images_path/super.img does not exist"
exit 1
else
cmd="$cmd flash super $images_path/super.img"
fi
if [ -z "$boot" ]; then
boot=false
elif [ ! -f "$images_path/boot.img" ]; then
echo "Error: $images_path/boot.img does not exist"
exit 1
else
cmd="$cmd flash boot $images_path/boot.img"
fi
if [ -n "$format" ]; then
cmd="$cmd format userdata"
fi
# This HAS to be the last thing
if [ -z "$no_reboot" ]; then
cmd="$cmd reboot"
fi
if [ -n "$to_bootloader" ]; then
echo "rebooting to bootloader"
at-to_bootloader
fi
pushd $images_path > /dev/null
echo "$ $cmd"
eval $cmd
popd > /dev/null
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