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make help more readable

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ghtm2 2023-02-16 17:27:40 +01:00 committed by GitHub
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235
conty-start.sh
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@ -1,24 +1,138 @@
#!/usr/bin/env bash
## Dependencies: bash gzip fuse2 (or fuse3) tar coreutils
# Prevent launching as root
if [ $EUID = 0 ] && [ -z "$ALLOW_ROOT" ]; then
echo "Do not run this script as root!"
echo
echo "If you really need to run it as root and you know what you are doing,"
echo "set the ALLOW_ROOT environment variable."
msg_root="
Do not run this script as root!
If you really need to run it as root and know what you are doing, set
the ALLOW_ROOT environment variable.
"
# Refuse to run as root unless environment variable is set
if (( EUID == 0 )) && [ -z "$ALLOW_ROOT" ]; then
echo "${msg_root}"
exit 1
fi
# Conty version
script_version="1.21.3"
# Important variables to manually adjust after modification!
# Needed to avoid problems with mounting due to an incorrect offset.
script_size=25161
utils_size=2507588
# Full path to the script
script_literal="${BASH_SOURCE[0]}"
script_name="$(basename "${script_literal}")"
script="$(readlink -f "${script_literal}")"
# Help output
msg_help="
Usage: ${script_name} [COMMAND] [ARGUMENTS]
Arguments:
-e Extract the image
-h Display this text
-H Display bubblewrap help
-l Show a list of all installed packages
-m Mount/unmount the image
The image will be mounted if it's not, unmounted otherwise.
Mount point can be changed with the BASE_DIR env variable
(the default is /tmp).
-o Show the image offset
-u Update all packages inside the container
This requires a rebuild of the image, which may take quite
a lot of time, depending on your hardware and internet speed.
Additional disk space (about 6x the size of the current file)
is needed during the update process.
-U Same as -u with the addition of updating the init script and
the integrated utils. This option may break Conty in some cases,
use with caution!
-v Display version of this script
-V Display version of the image
Arguments that don't match any of the above will be passed directly to
bubblewrap, so all bubblewrap arguments are supported as well.
Environment variables:
BASE_DIR Sets a custom directory where Conty will extract its
builtin utilities and mount the image.
The default is /tmp.
DISABLE_NET Disables network access.
DISABLE_X11 Disables access to X server.
Note: Even with this variable enabled applications
can still access your X server if it doesn't use
XAUTHORITY and listens to the abstract socket. This
can be solved by enabling XAUTHORITY, disabling the
abstract socket or by disabling network access.
HOME_DIR Sets the home directory to a custom location.
For example: HOME_DIR=\"$HOME/custom_home\"
Note: If this variable is set the home directory
inside the container will still appear as $HOME,
even though the custom directory is used.
QUIET_MODE Disables all non-error Conty messages.
Doesn't affect the output of applications.
SANDBOX Enables a sandbox.
To control which files and directories are available
inside the container, you can use the --bind and
--ro-bind launch arguments.
(See bubblewrap help for more info).
SANDBOX_LEVEL Controls the strictness of the sandbox.
Available levels:
1: Isolates all user files.
2: Additionally disables dbus and hides all
running processes.
3: Additionally disables network access and
isolates X11 server with Xephyr.
The default is 1.
USE_SYS_UTILS Tells the script to use squashfuse/dwarfs and bwrap
installed on the system instead of the builtin ones.
XEPHYR_SIZE Sets the size of the Xephyr window. The default is
800x600.
Additional notes:
System directories/files will not be available inside the container if
you set the SANDBOX variable but don't bind (mount) any items or set
HOME_DIR. A fake temporary home directory will be used instead.
If the executed script is a symlink with a different name, said name
will be used as the command name.
For instance, if the script is a symlink with the name \"wine\" it will
automatically run wine during launch.
Besides updating all packages, you can also install and remove packages
using the same -u (or -U) argument. To install packages add them as
additional arguments, to remove add a minus sign (-) before their names.
To install: ${script_name} -u pkgname1 pkgname2 pkgname3 ...
To remove: ${script_name} -u -pkgname1 -pkgname2 -pkgname3 ...
In this case Conty will update all packages and additionally install
and/or remove specified packages.
If you are using an Nvidia GPU, please read the following:
https://github.com/Kron4ek/Conty#known-issues
"
# MD5 of the last 1 MB of the file
script_md5="$(tail -c 1000000 "${script}" | md5sum | head -c 7)"
@ -39,17 +153,8 @@ fi
mount_point="${working_dir}"/mnt
# It is important to set correct sizes below, otherwise there will be
# a problem with mounting the image due to an incorrectly calculated offset.
# The size of this script
scriptsize=26179
# The size of the utils archive
utilssize=2507588
# Offset where the image is stored
offset=$((scriptsize+utilssize))
offset=$((script_size+utils_size))
# Detect if the image is compressed with DwarFS or SquashFS
if [ "$(tail -c +$((offset+1)) "${script}" | head -c 6)" = "DWARFS" ]; then
@ -71,98 +176,14 @@ if [ -L "${script_literal}" ]; then
fi
if [ -z "${script_is_symlink}" ]; then
if [ "$1" = "--help" ] || [ "$1" = "-h" ] || [ -z "$1" ]; then
echo "Usage: ./conty.sh command command_arguments"
echo
echo "Arguments:"
echo
echo -e "-v \tShow version of this script"
echo -e "-V \tShow version of the image"
echo -e "-e \tExtract the image"
echo -e "-o \tShow the image offset"
echo -e "-l \tShow a list of all installed packages"
echo -e "-m \tMount/unmount the image"
echo -e "\tThe image will be mounted if it's not mounted, and unmounted otherwise."
echo -e "\tMount point can be changed with the BASE_DIR env variable"
echo -e "\t(the default is /tmp)."
echo -e "-u \tUpdate all packages inside the container"
echo -e "\tThis will update all packages inside the container and will rebuild"
echo -e "\tthe image. This may take quite a lot of time, depending"
echo -e "\ton your hardware and internet speed. Additional disk space"
echo -e "\t(about 6x the size of the current file) is needed during"
echo -e "\tthe update process."
echo -e "-U \tThe same as -u but will also update the init script (conty-start.sh)"
echo -e "\tand the integrated utils. This option may break Conty in some cases,"
echo -e "\tuse with caution."
echo -e "-H \tShow the bubblewrap help"
echo
echo "Arguments that don't match any of the above will be passed directly to"
echo "bubblewrap. So all bubblewrap arguments are supported as well."
echo
echo "Environment variables:"
echo
echo -e "DISABLE_NET \tDisables network access"
echo -e "DISABLE_X11 \tDisables access to X server"
echo -e "\t\tNote that even with this variable enabled applications can"
echo -e "\t\tstill access your X server if it does not use XAUTHORITY and"
echo -e "\t\tlistens to abstract socket. This can be solved by enabling"
echo -e "\t\tXAUTHORITY or disabling the abstract socket or disabling"
echo -e "\t\tnetwork access."
echo -e "SANDBOX \tEnables sandbox"
echo -e "\t\tTo control which files and directories are available inside"
echo -e "\t\tthe container when SANDBOX is enabled, you can use the --bind"
echo -e "\t\tand --ro-bind launch arguments (see the bubblewrap help for"
echo -e "\t\tmore info)."
echo -e "SANDBOX_LEVEL \tControls the strictness of the sandbox"
echo -e "\t\tAvailable levels are 1-3. The default is 1."
echo -e "\t\tLevel 1 isolates all user files."
echo -e "\t\tLevel 2 isolates all user files, disables dbus and hides"
echo -e "\t\tall running processes."
echo -e "\t\tLevel 3 does the same as the level 2, but additionally"
echo -e "\t\tdisables network access and isolates X11 server with Xephyr."
echo -e "XEPHYR_SIZE \tSets the size of the Xephyr window. The default is 800x600."
echo -e "HOME_DIR \tSets the HOME directory to a custom location."
echo -e "\t\tFor example, HOME_DIR=\"/home/username/custom_home\""
echo -e "\t\tIf you set this, HOME inside the container will still appear"
echo -e "\t\tas /home/username, but actually a custom directory will be"
echo -e "\t\tused for it."
echo -e "USE_SYS_UTILS \tMakes the script to use squashfuse/dwarfs and bwrap"
echo -e "\t\tinstalled on the system instead of the builtin ones."
echo -e "BASE_DIR \tSets a custom directory where Conty will extract"
echo -e "\t\tits builtin utilities and mount the image."
echo -e "\t\tThe default location is /tmp."
echo -e "QUIET_MODE \tDisables all non-error Conty messages."
echo -e "\t\tDoesn't affect the output of applications."
echo
echo "Additional notes:"
echo
echo "If you enable SANDBOX but don't bind (mount) any items or don't set HOME_DIR,"
echo "then no system directories/files will be available at all inside the container"
echo "and a fake temporary HOME directory will be used."
echo
echo "If the script is a symlink to itself but with a different name,"
echo "then the symlinked script will automatically run a program according"
echo "to its name. For instance, if the script is a symlink with the name \"wine\","
echo "then it will automatically run wine during launch."
echo
echo "Besides updating all packages, you can also remove and install packages using"
echo "the same -u (or -U) argument. To install packages add them as additional"
echo "arguments, and to remove packages add a minus sign (-) before their names."
echo "To install: ./conty.sh -u pkgname1 pkgname2 pkgname3"
echo "To remove: ./conty.sh -u -pkgname1 -pkgname2 -pkgname3"
echo "In this case Conty will update all packages and will additionally"
echo "install and/or remove specified packages."
echo
echo "If you are using an Nvidia GPU, please read the information"
echo "here: https://github.com/Kron4ek/Conty#known-issues"
if [ "$1" = "-h" ] || [ -z "$1" ]; then
echo "${msg_help}"
exit
elif [ "$1" = "-v" ]; then
echo "${script_version}"
exit
elif [ "$1" = "-o" ]; then
echo "${offset}"
exit
fi
fi
@ -268,7 +289,7 @@ if [ "${USE_SYS_UTILS}" != 1 ]; then
bwrap="${working_dir}"/utils/bwrap
if [ ! -f "${mount_tool}" ] || [ ! -f "${bwrap}" ]; then
tail -c +$((scriptsize+1)) "${script}" | head -c "${utilssize}" | tar -C "${working_dir}" -zxf -
tail -c +$((script_size+1)) "${script}" | head -c "${utils_size}" | tar -C "${working_dir}" -zxf -
if [ ! -f "${mount_tool}" ] || [ ! -f "${bwrap}" ]; then
clear
@ -376,7 +397,7 @@ if { [ "$1" = "-u" ] || [ "$1" = "-U" ]; } && [ -z "${script_is_symlink}" ]; the
fi
fi
tail -c +$((scriptsize+1)) "${script}" | head -c "${utilssize}" | tar -C "${update_temp_dir}" -zxf -
tail -c +$((script_size+1)) "${script}" | head -c "${utils_size}" | tar -C "${update_temp_dir}" -zxf -
if [ "${dwarfs_image}" = 1 ]; then
chmod +x utils/dwarfsextract 2>/dev/null
@ -445,8 +466,8 @@ if { [ "$1" = "-u" ] || [ "$1" = "-U" ]; } && [ -z "${script_is_symlink}" ]; the
if [ ! -s conty-start.sh ] || [ ! -s utils.tar.gz ]; then
echo "Extracting the init script and the integrated utils"
tail -c +$((scriptsize+1)) "${script}" | head -c "${utilssize}" > utils.tar.gz
head -c "${scriptsize}" "${script}" > conty-start.sh
tail -c +$((script_size+1)) "${script}" | head -c "${utils_size}" > utils.tar.gz
head -c "${script_size}" "${script}" > conty-start.sh
fi
# Check if there are additional arguments passed