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#!/bin/sh
#
# Purpose {{{
# This script will try to get last version of teams-for-linux .deb file
# https://github.com/IsmaelMartinez/teams-for-linux
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# 1. Get current version from APT repo (by default).
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# 1.b Or use version from manually installed package (with --file option).
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# 2. Get latest version from github repository.
# 3. Compare current and new versions.
# 4. Download the .deb file for this new version.
# 5. Create a temp file (to monitor) if an upgrade is available.
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#
# 2023-03-04
# }}}
# How-to use {{{
## 1. Needs releasetags script, in the same directory
## cf. https://git.ipr.univ-rennes1.fr/cellinfo/scripts/src/master/github/releasetags
# wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/github/releasetags
## 2. Create a cron job, eg
#00 20 * * * root /opt/repos/ipr.scripts/github/check.teams-for-linux.update
## 2-1 Create a cron job to compare the version of manually installed package
#00 20 * * * root /opt/repos/ipr.scripts/github/check.teams-for-linux.update --file
## 3. Monitor the temp file
# }}}
# Flags {{{
## Exit on error
set -o errexit
## Exit on unset var
### Use "${VARNAME-}" to test a var that may not have been set
set -o nounset
## Pipeline command is treated as failed
### Not available in POSIX sh −
#set -o pipefail
## Help with debugging
### Call the script by prefixing it with "TRACE=1 ./script.sh"
if [ " ${ TRACE -0 } " -eq 1 ] ; then set -o xtrace; fi
# }}}
# Vars {{{
PROGNAME = $( basename " ${ 0 } " ) ; readonly PROGNAME
PROGDIR = $( readlink --canonicalize-missing $( dirname " ${ 0 } " ) ) ; readonly PROGDIR
ARGS = " ${ * } " ; readonly ARGS
readonly NBARGS = " ${# } "
[ -z " ${ DEBUG - } " ] && DEBUG = 1
## Export DEBUG for sub-script
export DEBUG
## Default values for some vars
readonly PACKAGE_NAME_DEFAULT = "teams-for-linux"
readonly CHECK_MODE_DEFAULT = "repository"
## Colors
readonly PURPLE = '\033[1;35m'
readonly RED = '\033[0;31m'
readonly RESET = '\033[0m'
readonly COLOR_DEBUG = " ${ PURPLE } "
# }}}
usage( ) { # {{{
cat <<- HELP
usage: $PROGNAME [ -d| -h]
Try to get last version of ${ PACKAGE_NAME_DEFAULT } .deb file.
EXAMPLES
- Check ${ PACKAGE_NAME_DEFAULT } version ( from APT repository or manually installed file) .
${ PROGNAME }
OPTIONS
-d,--debug
Enable debug messages.
-h,--help
Print this help message.
HELP
}
# }}}
debug_message( ) { # {{{
local_debug_message = " ${ 1 } "
## Print message if DEBUG is enable (=0)
[ " ${ DEBUG } " -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' " DEBUG − ${ PROGNAME } ${ local_debug_message } "
unset local_debug_message
return 0
}
# }}}
error_message( ) { # {{{
local_error_message = " ${ 1 } "
local_error_code = " ${ 2 } "
## Print message
printf '%b\n' " ERROR − ${ PROGNAME } ${ RED } ${ local_error_message } ${ RESET } " >& 2
unset local_error_message
exit " ${ local_error_code : =66 } "
}
# }}}
is_var_empty( ) { # {{{
local_var_empty = " ${ 1 } "
debug_prefix = " ${ 2 :- } "
## Return False by default
return_var_empty = "1"
debug_message " ${ debug_prefix } is_var_empty − ${ 1 } ). "
[ -z " ${ local_var_empty } " ] && return_var_empty = "0"
unset debug_prefix
unset local_var_empty
return " ${ return_var_empty } "
}
# }}}
define_vars( ) { # {{{
debug_message "-- define_vars BEGIN"
## If repo_url wasn't defined {{{
is_var_empty " ${ repo_url - } " "|| " \
&& repo_url = "https://github.com/IsmaelMartinez/teams-for-linux" \
&& debug_message " | define_vars − ${ RED } ${ repo_url } ${ COLOR_DEBUG } ) for repo_url variable. "
## }}}
## If package_name wasn't defined (argument) {{{
## Use default value
is_var_empty " ${ package_name - } " "|| " \
&& debug_message " | define_vars − ${ RED } ${ PACKAGE_NAME_DEFAULT } ${ COLOR_DEBUG } ) for package_name variable. " \
&& package_name = " ${ PACKAGE_NAME_DEFAULT } "
## }}}
## Get new_version from application repository {{{
new_version = $( " ${ PROGDIR } " /releasetags " ${ repo_url } " | grep -vE -- '(dev|rc)' | head -n1 | sed 's/v//g' )
if is_var_empty " ${ new_version - } " "|| " ; then
error_message " define_vars − ${ package_name } new version ( ${ new_version } ). " 1
else
debug_message " | define_vars − ${ RED } ${ new_version } ${ COLOR_DEBUG } ) for new_version variable. "
fi
## }}}
## If new_package_filename wasn't defined {{{
is_var_empty " ${ new_package_filename - } " "|| " \
&& new_package_filename = " ${ package_name } _ ${ new_version } _amd64.deb " \
&& debug_message " | define_vars − ${ RED } ${ new_package_filename } ${ COLOR_DEBUG } ) for new_package_filename variable. "
## }}}
## If new_package_url wasn't defined {{{
is_var_empty " ${ new_package_url - } " "|| " \
&& new_package_url = " ${ repo_url } /releases/download/v ${ new_version } / ${ new_package_filename } " \
&& debug_message " | define_vars − ${ RED } ${ new_package_url } ${ COLOR_DEBUG } ) for new_package_url variable. "
## }}}
## If new_version_file wasn't defined {{{
is_var_empty " ${ new_version_file - } " "|| " \
&& new_version_file = " /tmp/.github. ${ package_name } .upgrade " \
&& debug_message " | define_vars − ${ RED } ${ new_version_file } ${ COLOR_DEBUG } ) for new_version_file variable. "
## }}}
## If tmp_package_path wasn't defined {{{
is_var_empty " ${ tmp_package_path - } " "|| " \
&& tmp_package_path = " /tmp/. ${ new_package_filename } " \
&& debug_message " | define_vars − ${ RED } ${ tmp_package_path } ${ COLOR_DEBUG } ) for tmp_package_path variable. "
## }}}
## If new_package_path wasn't defined {{{
is_var_empty " ${ new_package_path - } " "|| " \
&& new_package_path = " /tmp/ ${ new_package_filename } " \
&& debug_message " | define_vars − ${ RED } ${ new_package_path } ${ COLOR_DEBUG } ) for new_package_path variable. "
## }}}
## If check_mode wasn't defined (argument) {{{
## Use default value
is_var_empty " ${ check_mode - } " "|| " \
&& debug_message " | define_vars − ${ RED } ${ CHECK_MODE_DEFAULT } ${ COLOR_DEBUG } ) for check_mode variable. " \
&& check_mode = " ${ CHECK_MODE_DEFAULT } "
## }}}
## Get current_version according to the check_mode {{{
case " ${ check_mode } " in
"repo" | "repository" ) ## Check current version from repository
current_version = $( apt-cache policy -- " ${ package_name } " | awk '/Candidate:/ {print $2}' | sed 's/.:\(.*\)-.*/\1/' )
; ;
"file" ) ## Check current version from installed .deb file
current_version = $( dpkg --list -- " ${ package_name } " | awk -v pattern = " ${ package_name } " '$0~pattern {print $3}' | sed 's/.:\(.*\)-.*/\1/' )
; ;
* ) ## unknow mode
error_message " define_vars − ${ check_mode } . See help message with -h. " 2
; ;
esac
## If current_version is empty
is_var_empty " ${ current_version } " "|| " \
&& error_message " define_vars − ${ current_version } ) for package ( ${ package_name } ). " 2
## }}}
debug_message "-- define_vars END"
}
# }}}
is_version_greater_than( ) { # {{{
first_value = " ${ 1 } "
value_to_compare = " ${ 2 } "
debug_prefix = " ${ 3 :- } "
## Return False by default
return_is_version_greater_than = "1"
debug_message " ${ debug_prefix } is_version_greater_than −
Is first value ( ${ first_value } ) greater than the second value ( ${ value_to_compare } ) ."
if printf '%s\n' " ${ first_value } " " ${ value_to_compare } " | sort --check= quiet --version-sort; then
debug_message " ${ debug_prefix } is_version_greater_than − ${ first_value } <= ${ value_to_compare } . "
return_is_version_greater_than = "1"
else
debug_message " ${ debug_prefix } is_version_greater_than − ${ first_value } > ${ value_to_compare } . "
return_is_version_greater_than = "0"
fi
unset first_value
unset value_to_compare
unset debug_prefix
return " ${ return_is_version_greater_than } "
}
# }}}
main( ) { # {{{
debug_message "--- MAIN BEGIN"
## Define all vars
define_vars
## Uncomment variable(s) to simulate different behaviour
#current_version="1.0.2"
#new_version="42.3.1"
debug_message "-- Test version BEGIN"
## If new_version is greater than current_version {{{
if is_version_greater_than " ${ new_version } " " ${ current_version } " "|| " ; then
debug_message " | Current version ( ${ current_version } ) is older than new one \
( ${ new_version } ) ."
### If it doesn't already exists, download the new package {{{
if [ ! -f " ${ new_package_path } " ] ; then
debug_message " | Download .deb file from ${ package_name } repository on Github to: ${ new_package_path } . "
wget --quiet " ${ new_package_url } " --output-document= " ${ new_package_path } "
fi
### }}}
## }}}
## If current version is uptodate {{{
else
debug_message " | Current version ( ${ current_version } ) seems uptodate \
or newer than available version ( ${ new_version } ) ."
### Ensure to remove any temp file and useless .deb files
rm --force -- " ${ new_version_file } " " ${ new_package_path } " " ${ tmp_package_path } "
### Exit
debug_message "-- Test version END"
debug_message "--- MAIN END"
exit 0
fi
## }}}
debug_message "-- Test version END"
## Verify downloaded package {{{
debug_message "-- Verify downloaded package BEGIN"
## If the downloaded package has a size greater than zero {{{
if [ -s " ${ new_package_path } " ] ; then
debug_message "| Downloaded package looks good."
### Create a temp file to monitor
touch -- " ${ new_version_file } "
printf '\e[1;35m%-6s\e[m\n' " An upgrade is available for ${ package_name } terminal (current ${ current_version } ) ${ new_version } . " >> " ${ new_version_file } "
## }}}
## If the size is null {{{
else
debug_message "| Empty file, don't need to go further."
### Ensure to remove the file to monitor
rm --force -- " ${ new_version_file } "
### Keep a record of the downloaded package because as a new release might come soon
mv --force -- " ${ new_package_path } " " ${ tmp_package_path } "
fi
## }}}
debug_message "-- Verify downloaded package END"
# }}}
debug_message "--- MAIN END"
# Exit
exit 0
}
# }}}
# Manage arguments # {{{
# This code can't be in a function due to argument management
if [ ! " ${ NBARGS } " -eq "0" ] ; then
manage_arg = "0"
## If the first argument ask for help (h|help|-h|-help|-*h|-*help) {{{
if printf -- '%s' " ${ 1 - } " | grep --quiet --extended-regexp -- " ^-*h(elp)? $" ; then
usage
exit 0
fi
## }}}
## If the first argument is not an option
if ! printf -- '%s' " ${ 1 } " | grep --quiet --extended-regexp -- "^-+" ;
then
## Print help message and exit
printf '%b\n' " ${ RED } Invalid option: ${ 1 } ${ RESET } "
printf '%b\n' "---"
usage
exit 1
fi
# Parse all options (start with a "-") one by one
while printf -- '%s' " ${ 1 - } " | grep --quiet --extended-regexp -- "^-+" ; do
case " ${ 1 } " in
-d| --debug ) ## debug
DEBUG = 0
debug_message "--- Manage argument BEGIN"
; ;
-f| --file| --files| -p| --package ) ## Define check_mode to file mode
## Define var
readonly check_mode = "file"
; ;
--repo| --repository ) ## Define check_mode to repo mode
## Define var
readonly check_mode = "repo"
; ;
* ) ## unknow option
printf '%b\n' " ${ RED } Invalid option: ${ 1 } ${ RESET } "
printf '%b\n' "---"
usage
exit 1
; ;
esac
debug_message " | ${ RED } ${ 1 } ${ COLOR_DEBUG } option managed. "
## Move to the next argument
shift
manage_arg = $(( manage_arg+1))
done
debug_message " | ${ RED } ${ manage_arg } ${ COLOR_DEBUG } argument(s) successfully managed. "
else
debug_message "| No arguments/options to manage."
fi
debug_message "--- Manage argument END"
# }}}
main
# This should never be reach
exit 255
