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searxng_ynh/scripts/install

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#!/bin/bash
#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================
source _common.sh
source /usr/share/yunohost/helpers
#=================================================
# MANAGE SCRIPT FAILURE
#=================================================
ynh_clean_setup () {
### Remove this function if there's nothing to clean before calling the remove script.
true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors
#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================
domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
is_public=$YNH_APP_ARG_IS_PUBLIC
admin=$YNH_APP_ARG_ADMIN
### If it's a multi-instance app, meaning it can be installed several times independently
### The id of the app as stated in the manifest is available as $YNH_APP_ID
### The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2"...)
### The app instance name is available as $YNH_APP_INSTANCE_NAME
### - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
### - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
### - ynhexample__{N} for the subsequent installations, with N=3,4...
### The app instance name is probably what interests you most, since this is
### guaranteed to be unique. This is a good unique identifier to define installation path,
### db names...
app=$YNH_APP_INSTANCE_NAME
#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
### About --weight and --time
### ynh_script_progression will show to your final users the progression of each scripts.
### In order to do that, --weight will represent the relative time of execution compared to the other steps in the script.
### --time is a packager option, it will show you the execution time since the previous call.
### This option is implied when running in CI_package_check, you can manually add it if you are manually testing the app.
### Use the execution time displayed in the CI report or by adding --time to the command, to estimate the weight of a step.
### A common way to do it is to set a weight equal to the execution time in second +1.
### The execution time is given for the duration since the previous call. So the weight should be applied to this previous call.
ynh_script_progression --message="Validating installation parameters..." --weight=1
### If the app uses NGINX as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
### If the app provides an internal web server (or uses another application server such as uWSGI), the final path should be "/opt/yunohost/$app"
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final_path="/opt/yunohost/$app"
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test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..." --weight=1
ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=1
### `ynh_install_app_dependencies` allows you to add any "apt" dependencies to the package.
### Those deb packages will be installed as dependencies of this package.
### If you're not using this helper:
### - Remove the section "REMOVE DEPENDENCIES" in the remove script
### - Remove the variable "pkg_dependencies" in _common.sh
### - As well as the section "REINSTALL DEPENDENCIES" in the restore script
### - And the section "UPGRADE DEPENDENCIES" in the upgrade script
ynh_install_app_dependencies $pkg_dependencies
#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=1
# Create a system user
ynh_system_user_create --username=$app --home_dir="$final_path"
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=1
### `ynh_setup_source` is used to install an app from a zip or tar.gz file,
### downloaded from an upstream source, like a git repository.
### `ynh_setup_source` use the file conf/app.src
ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path"
# FIXME: this should be managed by the core in the future
# Here, as a packager, you may have to tweak the ownerhsip/permissions
# such that the appropriate users (e.g. maybe www-data) can access
# files in some cases.
# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
# this will be treated as a security issue.
chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"
#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=1
### `ynh_add_nginx_config` will use the file conf/nginx.conf
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path_no_root=${path_url%/}
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# Create a dedicated NGINX config
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ynh_add_nginx_config
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#=================================================
# SPECIFIC SETUP
#=================================================
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# INSTALL SEARXNG IN A VIRTUALENV
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#=================================================
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ynh_script_progression --message="Installing SearXNG..." --weight=2
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python3 -m venv --system-site-packages "$final_path"
set +u; source $final_path/bin/activate; set -u
pip3 install -U pip setuptools wheel pyyaml --no-cache-dir
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pip3 install -e "$final_path"
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#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Adding a configuration file..." --weight=1
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secret_key=$(ynh_string_random)
ynh_add_config --template="../conf/settings.yml" --destination="$final_path/searx/settings.yml"
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# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
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chmod 400 "$final_path/searx/settings.yml"
chown $app:$app "$final_path/searx/settings.yml"
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### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/some_config_file"
### ynh_store_file_checksum --file="$final_path/some_config_file"
#=================================================
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# CONFIGURE UWSGI FOR SEARX
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#=================================================
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ynh_script_progression --message="Configuring uWSGI for Searx..." --weight=2
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ynh_add_uwsgi_service
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#=================================================
# GENERIC FINALIZATION
#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1
### `ynh_systemd_action` is used to start a systemd service for an app.
### Only needed if you have configure a systemd service
### If you're not using these lines:
### - Remove the section "STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the backup script
### - As well as the section "START SYSTEMD SERVICE" in the restore script
### - As well as the section"STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the upgrade script
### - And the section "STOP SYSTEMD SERVICE" and "START SYSTEMD SERVICE" in the change_url script
# Start a systemd service
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ynh_systemd_action --service_name=uwsgi-app@$app.service --action=start --line_match="spawned uWSGI master process" --log_path="/var/log/uwsgi/$app/$app.log"
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#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=1
# Make app public if necessary
if [ $is_public -eq 1 ]
then
# Everyone can access the app.
# The "main" permission is automatically created before the install script.
ynh_permission_update --permission="main" --add="visitors"
fi
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1
ynh_systemd_action --service_name=nginx --action=reload
#=================================================
# END OF SCRIPT
#=================================================
ynh_script_progression --message="Installation of $app completed" --last