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|
#!/usr/bin/env bash
#
# SPDX-FileCopyrightText: 2021 René de Hesselle <dehesselle@web.de>
#
# SPDX-License-Identifier: GPL-2.0-or-later
### description ################################################################
# This is a helper to create release archives and mount them.
### shellcheck #################################################################
# Nothing here.
### dependencies ###############################################################
#------------------------------------------------------ source jhb configuration
source "$(dirname "${BASH_SOURCE[0]}")"/../../etc/jhb.conf.sh
#------------------------------------------- source common functions from bash_d
# bash_d is already available (it's part of jhb configuration)
bash_d_include error
### variables ##################################################################
# Nothing here.
### functions ##################################################################
function create_tar
{
local file=$ARTIFACT_DIR/$RELEASE_ARCHIVE
echo_i "creating $file"
tar -C "$WRK_DIR" -cp "$(basename "$VER_DIR")" |
XZ_OPT=-T0 "$BIN_DIR"/xz > "$file"
shasum -a 256 "$file" > "$file".sha256
cat "$file".sha256
}
function create_dmg
{
local file=$ARTIFACT_DIR/$RELEASE_ARCHIVE
( # create dmg
local vol_name
vol_name=$(basename "$VER_DIR")
cd "$WRK_DIR" || exit 1
hdiutil create -fs HFS+ -ov -format UDBZ \
-srcfolder "$vol_name" \
-volname "$vol_name" \
"$file"
)
( # create and print checksum
cd "$(dirname "$file")" || exit 1
shasum -a 256 "$(basename "$file")" > "$file".sha256
cat "$file".sha256
)
}
function mount_dmg
{
local file=$REP_DIR/$RELEASE_ARCHIVE
local mountpoint=$VER_DIR
if [ ! -d "$mountpoint" ]; then
mkdir -p "$mountpoint"
fi
echo_i "mounting $(basename "$file") may take some time"
local device
device=$(hdiutil attach -nomount "$file" | grep "^/dev/disk" |
grep "Apple_HFS" | awk '{ print $1 }')
echo_i "$file attached to $device"
mount -o nobrowse,noowners,noquarantine,ro -t hfs "$device" "$mountpoint"
echo_i "$device mounted to $mountpoint"
}
function unmount_dmg
{
local mountpoint=$VER_DIR
while : ; do # unmount everything (in reverse order)
local disk
disk=$(mount | grep "$mountpoint" | tail -n1 | awk '{ print $1 }')
disk=${disk%s[0-9]} # cut off slice specification
if [ ${#disk} -eq 0 ]; then
break # nothing to do here
else
# We loop over the 'eject' since it occasionally timeouts.
while ! diskutil eject "$disk" > /dev/null; do
echo_w "retrying to eject $disk in 5 seconds"
sleep 5
done
echo_i "ejected $disk"
fi
done
}
function download_dmg
{
if [ ! -d "$REP_DIR" ]; then
mkdir -p "$REP_DIR"
fi
for url in "${RELEASE_URLS[@]}"; do
local partial_download=$REP_DIR/${FUNCNAME[0]} # TMP_DIR not available yet
# download (at least) 100 kb of data
curl -L "$url" 2>/dev/null | head -c 100000 > "$partial_download"
# if we got 100 kb, it's not a "404 file not found"
if [ "$(stat -f%z "$partial_download")" -eq 100000 ]; then
echo_i "downloading $url"
curl -o "$REP_DIR/$RELEASE_ARCHIVE" -L -C - "$url"
break
fi
done
rm "$partial_download"
}
function install_dmg
{
local overlay_size=${1:-1} # unit GiB, default 1
local file=$REP_DIR/$RELEASE_ARCHIVE
# download and mount read-only disk image
if [ -f "$file" ]; then
echo_i "using $file"
else
download_dmg
fi
mount_dmg
# create writable overlay
local device
device=$(hdiutil attach -nomount ram://$((overlay_size * 1024 * 2048)) | xargs)
newfs_hfs -v "$RELEASE_OVERLAY" "$device" >/dev/null
echo_i "$overlay_size GiB ram attached to $device"
mount -o nobrowse,rw,union -t hfs "$device" "$VER_DIR"
echo_i "$device union-mounted at $VER_DIR"
# Sadly, there are some limitations involved with union-mounting:
# - Files are not visible to macOS' versions of 'ls' or 'find'.
# (The GNU versions do work though.)
# - You cannot write in a location without having written to its
# parent location first. That's why we need to pre-create all directories
# below.
#
# (Shadow-mounting a dmg is not a feasible alternative due to its
# bad write-performance.)
# Create and run a script for mass-creating directories.
echo_i "setting up directories in overlay"
gfind "$VER_DIR" -mindepth 1 -type d \
! -path "$BLD_DIR/*" ! -path "$SRC_DIR/*" \
-exec echo "mkdir {}" \; > "$VER_DIR"/create_dirs.sh
chmod 755 "$VER_DIR"/create_dirs.sh
"$VER_DIR"/create_dirs.sh
rm "$VER_DIR"/create_dirs.sh
}
function uninstall_dmg
{
unmount_dmg
}
function main
{
local command=$1
local option=$2
case "$command" in
create_dmg)
create_dmg
;;
create_tar)
create_tar
;;
install_dmg)
install_dmg "$option" # option: overlay size in GiB, defaul is 1
;;
uninstall_dmg)
uninstall_dmg
;;
*)
echo_e "usage: $0 {create_dmg|create_tar|install_dmg|uninstall_dmg}"
;;
esac
}
### main #######################################################################
error_trace_enable
main "$@"
|
