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Speedup and fix umount #33

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Speedup and fix umount #33

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c0a82eb
Speedup activations of existing chroot
douglas-raillard-arm Oct 7, 2021
64a2b05
Fix umount
douglas-raillard-arm Oct 12, 2021
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61 changes: 30 additions & 31 deletions alpine-chroot-install
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Original file line number Diff line number Diff line change
Expand Up @@ -213,7 +213,7 @@ gen_destroy_script() {
[ "$(id -u)" -eq 0 ] || _sudo='sudo'

# Unmounts all filesystem under the specified directory tree.
cat /proc/mounts | cut -d' ' -f2 | grep "^$SCRIPT_DIR" | sort -r | while read path; do
cat /proc/mounts | cut -d' ' -f2 | grep "^$SCRIPT_DIR." | sort -r | while read path; do
echo "Unmounting $path" >&2
$_sudo umount -fn "$path" || exit 1
done
Expand Down Expand Up @@ -291,10 +291,6 @@ if [ "$(id -u)" -ne 0 ]; then
die 'This script must be run as root!'
fi

mkdir -p "$CHROOT_DIR"
cd "$CHROOT_DIR"


# Install QEMU user mode emulation if needed (works only on Debian and derivates)

QEMU_EMULATOR=''
Expand All @@ -316,37 +312,37 @@ if [ -n "$ARCH" ] && [ $(normalize_arch $ARCH) != $(normalize_arch $(uname -m))
cp -v "$QEMU_EMULATOR" usr/bin/
fi


einfo 'Downloading static apk-tools'

download_file "$APK_TOOLS_URI" "$APK_TOOLS_SHA256" "$TEMP_DIR"
tar -C "$TEMP_DIR" -xzf "$TEMP_DIR/${APK_TOOLS_URI##*/}"
mv "$TEMP_DIR"/apk-tools-*/apk "$TEMP_DIR"/


einfo "Installing Alpine Linux $ALPINE_BRANCH ($ARCH) into chroot"

mkdir -p "$CHROOT_DIR"/etc/apk
cd "$CHROOT_DIR"
cp /etc/resolv.conf etc/resolv.conf

printf '%s\n' \
"$ALPINE_MIRROR/$ALPINE_BRANCH/main" \
"$ALPINE_MIRROR/$ALPINE_BRANCH/community" \
$EXTRA_REPOS \
> etc/apk/repositories
# Initial one-time setup
if [ ! -e 'sbin/apk' ]; then
einfo 'Downloading static apk-tools'

dump_alpine_keys etc/apk/keys/
download_file "$APK_TOOLS_URI" "$APK_TOOLS_SHA256" "$TEMP_DIR"
tar -C "$TEMP_DIR" -xzf "$TEMP_DIR/${APK_TOOLS_URI##*/}"
mv "$TEMP_DIR"/apk-tools-*/apk "$TEMP_DIR"/

cp /etc/resolv.conf etc/resolv.conf
einfo "Installing Alpine Linux $ALPINE_BRANCH ($ARCH) into chroot"

"$TEMP_DIR"/apk \
--root . --update-cache --initdb --no-progress \
${ARCH:+--arch $ARCH} \
add alpine-base
printf '%s\n' \
"$ALPINE_MIRROR/$ALPINE_BRANCH/main" \
"$ALPINE_MIRROR/$ALPINE_BRANCH/community" \
$EXTRA_REPOS \
> etc/apk/repositories

gen_chroot_script > enter-chroot
gen_destroy_script > destroy
chmod +x enter-chroot destroy
dump_alpine_keys etc/apk/keys/

"$TEMP_DIR"/apk \
--root . --update-cache --initdb --no-progress \
${ARCH:+--arch $ARCH} \
add alpine-base

gen_chroot_script > enter-chroot
gen_destroy_script > destroy
chmod +x enter-chroot destroy
fi


einfo 'Binding filesystems into chroot'
Expand Down Expand Up @@ -375,8 +371,11 @@ einfo 'Setting up Alpine'

./enter-chroot <<-EOF
set -e
apk update
apk add $ALPINE_PACKAGES

if [ "$ALPINE_PACKAGES" != ' ' ]; then
apk update
apk add $ALPINE_PACKAGES
fi

if [ -d /etc/sudoers.d ] && [ ! -e /etc/sudoers.d/wheel ]; then
echo '%wheel ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/wheel
Expand Down