mirror of
https://github.com/YunoHost/yunohost.git
synced 2024-09-03 20:06:10 +02:00
583 lines
20 KiB
Bash
583 lines
20 KiB
Bash
#!/bin/bash
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YNH_APP_BASEDIR=${YNH_APP_BASEDIR:-$(realpath ..)}
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# Handle script crashes / failures
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#
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# [internal]
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#
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ynh_exit_properly() {
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local exit_code=$?
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if [[ "${YNH_APP_ACTION:-}" =~ ^install$|^upgrade$|^restore$ ]]; then
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rm -rf "/var/cache/yunohost/download/"
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fi
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if [ "$exit_code" -eq 0 ]; then
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exit 0 # Exit without error if the script ended correctly
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fi
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trap '' EXIT # Ignore new exit signals
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# Do not exit anymore if a command fail or if a variable is empty
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set +o errexit # set +e
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set +o nounset # set +u
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# Small tempo to avoid the next message being mixed up with other DEBUG messages
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sleep 0.5
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# Exit with error status
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# We don't call ynh_die basically to avoid unecessary 10-ish
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# debug lines about parsing args and stuff just to exit 1..
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exit 1
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}
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# Exits if an error occurs during the execution of the script.
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#
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# [packagingv1]
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#
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# usage: ynh_abort_if_errors
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#
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# This configure the rest of the script execution such that, if an error occurs
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# or if an empty variable is used, the execution of the script stops immediately
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ynh_abort_if_errors() {
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set -o errexit # set -e; Exit if a command fail
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set -o nounset # set -u; And if a variable is used unset
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trap ynh_exit_properly EXIT # Capturing exit signals on shell script
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}
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# When running an app script, auto-enable ynh_abort_if_errors except for remove script
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if [[ "${YNH_CONTEXT:-}" != "regenconf" ]] && [[ "${YNH_APP_ACTION}" != "remove" ]]; then
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ynh_abort_if_errors
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fi
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# Execute a command after sudoing as $app
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#
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# Note that the $PATH variable is preserved (using --preserve-env=PATH)
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#
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# usage: ynh_exec_as_app COMMAND [ARG ...]
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ynh_exec_as_app() {
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sudo --preserve-env=PATH -u "$app" "$@"
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}
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# Curl abstraction to help with POST requests to local pages (such as installation forms)
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#
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# usage: ynh_local_curl "page_uri" "key1=value1" "key2=value2" ...
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# | arg: page_uri - Path (relative to `$path`) of the page where POST data will be sent
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# | arg: key1=value1 - (Optionnal) POST key and corresponding value
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# | arg: key2=value2 - (Optionnal) Another POST key and corresponding value
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# | arg: ... - (Optionnal) More POST keys and values
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#
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# example: ynh_local_curl "/install.php?installButton" "foo=$var1" "bar=$var2"
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#
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# For multiple calls, cookies are persisted between each call for the same app
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#
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# `$domain` and `$path` should be defined externally (and correspond to the domain.tld and the /path (of the app?))
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ynh_local_curl() {
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# Define url of page to curl
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local local_page=$(ynh_normalize_url_path $1)
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local full_path=$path$local_page
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if [ "${path}" == "/" ]; then
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full_path=$local_page
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fi
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local full_page_url=https://localhost$full_path
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# Concatenate all other arguments with '&' to prepare POST data
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local POST_data=""
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local arg=""
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for arg in "${@:2}"; do
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POST_data="${POST_data}${arg}&"
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done
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if [ -n "$POST_data" ]; then
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# Add --data arg and remove the last character, which is an unecessary '&'
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POST_data="--data ${POST_data::-1}"
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fi
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# Wait untils nginx has fully reloaded (avoid curl fail with http2)
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sleep 2
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local cookiefile=/tmp/ynh-$app-cookie.txt
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touch $cookiefile
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chown root $cookiefile
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chmod 700 $cookiefile
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# Temporarily enable visitors if needed...
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local visitors_enabled=$(ynh_permission_has_user --permission="main" --user="visitors" && echo yes || echo no)
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if [[ $visitors_enabled == "no" ]]; then
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ynh_permission_update --permission="main" --add="visitors"
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fi
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# Curl the URL
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curl --silent --show-error --insecure --location --header "Host: $domain" --resolve $domain:443:127.0.0.1 $POST_data "$full_page_url" --cookie-jar $cookiefile --cookie $cookiefile
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if [[ $visitors_enabled == "no" ]]; then
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ynh_permission_update --permission="main" --remove="visitors"
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fi
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}
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_acceptable_path_to_delete() {
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local file=$1
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local forbidden_paths=$(ls -d / /* /{var,home,usr}/* /etc/{default,sudoers.d,yunohost,cron*} /etc/yunohost/{apps,domains,hooks.d} /opt/yunohost 2> /dev/null)
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# Legacy : A couple apps still have data in /home/$app ...
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if [[ -n "${app:-}" ]]; then
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forbidden_paths=$(echo "$forbidden_paths" | grep -v "/home/$app")
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fi
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# Use realpath to normalize the path ..
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# i.e convert ///foo//bar//..///baz//// to /foo/baz
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file=$(realpath --no-symlinks "$file")
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if [ -z "$file" ] || grep -q -x -F "$file" <<< "$forbidden_paths"; then
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return 1
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else
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return 0
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fi
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}
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# Remove a file or a directory, checking beforehand that it's not a disastrous location to rm such as entire /var or /home
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#
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# usage: ynh_safe_rm path_to_remove
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ynh_safe_rm() {
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local target="$1"
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set +o xtrace # set +x
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if [ $# -ge 2 ]; then
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ynh_print_warn "/!\ Packager ! You provided more than one argument to ynh_safe_rm but it will be ignored... Use this helper with one argument at time."
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fi
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if [[ -z "$target" ]]; then
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ynh_print_warn "ynh_safe_rm called with empty argument, ignoring."
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elif [[ ! -e "$target" ]] && [[ ! -L "$target" ]]; then
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ynh_print_info "'$target' wasn't deleted because it doesn't exist."
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elif ! _acceptable_path_to_delete "$target"; then
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ynh_print_warn "Not deleting '$target' because it is not an acceptable path to delete."
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else
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rm --recursive "$target"
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fi
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set -o xtrace # set -x
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}
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# Read the value of a key in the app's manifest
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#
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# usage: ynh_read_manifest "key"
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# | arg: key - Name of the key to find
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# | ret: the value associate to that key
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ynh_read_manifest() {
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cat $YNH_APP_BASEDIR/manifest.toml | toml_to_json | jq ".$1" --raw-output
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}
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# Return the app upstream version, deduced from `$YNH_APP_MANIFEST_VERSION` and strippig the `~ynhX` part
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#
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# usage: ynh_app_upstream_version
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# | ret: the version number of the upstream app
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#
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# For example, if the manifest contains `4.3-2~ynh3` the function will return `4.3-2`
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ynh_app_upstream_version() {
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echo "${YNH_APP_MANIFEST_VERSION/~ynh*/}"
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}
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# Return 0 if the "upstream" part of the version changed, or 1 otherwise (ie only the ~ynh suffix changed)
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#
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# usage: if ynh_app_upstream_version_changed; then ...
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ynh_app_upstream_version_changed() {
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# "UPGRADE_PACKAGE" means only the ~ynh prefix changed
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[[ "$YNH_APP_UPGRADE_TYPE" == "UPGRADE_PACKAGE" ]] && return 1 || return 0
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}
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# Compare the current package version is strictly lower than another version given as an argument
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#
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# example: if ynh_app_upgrading_from_version_before 2.3.2~ynh1; then ...
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ynh_app_upgrading_from_version_before() {
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local version=$1
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[[ $version =~ '~ynh' ]] || ynh_die "Invalid argument for version, should include the ~ynhX prefix"
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dpkg --compare-versions $YNH_APP_CURRENT_VERSION lt $version
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}
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# Compare the current package version is lower or equal to another version given as an argument
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#
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# example: if ynh_app_upgrading_from_version_before_or_equal_to 2.3.2~ynh1; then ...
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ynh_app_upgrading_from_version_before_or_equal_to() {
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local version=$1
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[[ $version =~ '~ynh' ]] || ynh_die "Invalid argument for version, should include the ~ynhX prefix"
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dpkg --compare-versions $YNH_APP_CURRENT_VERSION le $version
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}
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# Apply sane permissions for files installed by ynh_setup_source and ynh_config_add.
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#
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# [internal]
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#
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# * Anything below $install_dir is chown $app:$app and chmod o-rwx,g-w
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# * The rest is considered as system configuration and chown root, chmod 400
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#
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_ynh_apply_default_permissions() {
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local target=$1
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is_in_dir() {
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# Returns false if parent is empty
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[ -n "$2" ] || return 1
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local child=$(realpath "$1" 2> /dev/null)
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local parent=$(realpath "$2" 2> /dev/null)
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[[ "${child}" =~ ^$parent ]]
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}
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# App files can have files of their own
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if ynh_system_user_exists --username="$app"; then
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# If this is a file in $install_dir or $data_dir : it should be owned and read+writable by $app only
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if [ -f "$target" ] && (is_in_dir "$target" "${install_dir:-}" || is_in_dir "$target" "${data_dir:-}" || is_in_dir "$target" "/etc/$app"); then
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chmod 600 "$target"
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chown "$app:$app" "$target"
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return
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fi
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# If this is the install dir (so far this is the only way this helper is called with a directory)
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if [ "$target" == "${install_dir:-}" ]; then
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# Read the group from the install_dir manifest resource
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local group="$(ynh_read_manifest 'resources.install_dir.group' | sed 's/null//g' | sed "s/__APP__/$app/g" | cut -f1 -d:)"
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if [[ -z "$group" ]]; then
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# We set the group to www-data for webapps that do serve static assets, which therefore need to be readable by nginx ...
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# The fact that the app needs this is infered by the existence of an nginx.conf and the presence of "alias" or "root" directive
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if grep -q '^\s*alias\s\|^\s*root\s' "$YNH_APP_BASEDIR/conf/nginx.conf" 2> /dev/null; then
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group="www-data"
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# Or default to "$app"
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else
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group="$app"
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fi
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fi
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# Files inside should be owned by $app with rw-r----- (+x for folders or files that already have +x)
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# The group needs read/dirtraversal (in particular if it's www-data)
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chmod -R u=rwX,g=rX,o=--- "$target"
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chown -R "$app:$group" "$target"
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return
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fi
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fi
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# Other files are considered system
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chmod 400 "$target"
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chown root:root "$target"
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}
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int_to_bool() {
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sed -e 's/^1$/True/g' -e 's/^0$/False/g' -e 's/^true$/True/g' -e 's/^false$/False/g'
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}
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toml_to_json() {
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python3 -c 'import toml, json, sys; print(json.dumps(toml.load(sys.stdin)))'
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}
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# Validate an IP address
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#
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# usage: ynh_validate_ip --family=family --ip_address=ip_address
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# | ret: 0 for valid ip addresses, 1 otherwise
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#
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# example: ynh_validate_ip 4 111.222.333.444
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ynh_validate_ip() {
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# ============ Argument parsing =============
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local -A args_array=([f]=family= [i]=ip_address=)
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local family
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local ip_address
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ynh_handle_getopts_args "$@"
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# ===========================================
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[ "$family" == "4" ] || [ "$family" == "6" ] || return 1
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# http://stackoverflow.com/questions/319279/how-to-validate-ip-address-in-python#319298
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python3 /dev/stdin << EOF
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import socket
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import sys
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family = { "4" : socket.AF_INET, "6" : socket.AF_INET6 }
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try:
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socket.inet_pton(family["$family"], "$ip_address")
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except socket.error:
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sys.exit(1)
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sys.exit(0)
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EOF
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}
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# Get the total or free amount of RAM+swap on the system
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#
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# [packagingv1]
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#
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# usage: ynh_get_ram [--free|--total]
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# | arg: --free - Count free RAM+swap
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# | arg: --total - Count total RAM+swap
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# | ret: the amount of free ram, in MB (MegaBytes)
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ynh_get_ram() {
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# ============ Argument parsing =============
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local -A args_array=([f]=free [t]=total)
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local free
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local total
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ynh_handle_getopts_args "$@"
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free=${free:-0}
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total=${total:-0}
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# ===========================================
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if [ $free -eq $total ]; then
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ynh_print_warn "You have to choose --free or --total when using ynh_get_ram"
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ram=0
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elif [ $free -eq 1 ]; then
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local free_ram=$(LC_ALL=C vmstat --stats --unit M | grep "free memory" | awk '{print $1}')
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local free_swap=$(LC_ALL=C vmstat --stats --unit M | grep "free swap" | awk '{print $1}')
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local free_ram_swap=$((free_ram + free_swap))
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local ram=$free_ram_swap
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elif [ $total -eq 1 ]; then
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local total_ram=$(LC_ALL=C vmstat --stats --unit M | grep "total memory" | awk '{print $1}')
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local total_swap=$(LC_ALL=C vmstat --stats --unit M | grep "total swap" | awk '{print $1}')
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local total_ram_swap=$((total_ram + total_swap))
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local ram=$total_ram_swap
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fi
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echo $ram
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}
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# Check if the scripts are being run by the package_check in CI
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#
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# usage: ynh_in_ci_tests
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#
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# Return 0 if in CI, 1 otherwise
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ynh_in_ci_tests() {
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[ "${PACKAGE_CHECK_EXEC:-0}" -eq 1 ]
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}
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# Retrieve a YunoHost user information
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#
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# usage: ynh_user_get_info --username=username --key=key
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# | arg: --username= - the username to retrieve info from
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# | arg: --key= - the key to retrieve
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# | ret: the value associate to that key
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#
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# example: mail=$(ynh_user_get_info --username="toto" --key=mail)
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ynh_user_get_info() {
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# ============ Argument parsing =============
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local -A args_array=([u]=username= [k]=key=)
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local username
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local key
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ynh_handle_getopts_args "$@"
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# ===========================================
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yunohost user info "$username" --output-as json --quiet | jq -r ".$key"
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}
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# Get the list of YunoHost users
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#
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# usage: ynh_user_list
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# | ret: one username per line as strings
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#
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# example: for u in $(ynh_user_list); do ... ; done
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ynh_user_list() {
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yunohost user list --output-as json --quiet | jq -r ".users | keys[]"
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}
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# Spawn a Bash shell with the app environment loaded
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#
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# usage: ynh_spawn_app_shell "appname"
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#
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# examples:
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# ynh_spawn_app_shell "foobar" <<< 'echo "$USER"'
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# ynh_spawn_app_shell "foobar" < /tmp/some_script.bash
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#
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# The spawned shell will have environment variables loaded and environment files sourced
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# from the app's service configuration file (defaults to $app.service, overridable by the packager with `service` setting).
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# If the app relies on a specific PHP version, then `php` will be aliased that version. The PHP command will also be appended with the `phpflags` settings.
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ynh_spawn_app_shell() {
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local app=$1
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# Force Bash to be used to run this helper
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[[ $0 =~ \/?bash$ ]] || ynh_die "Please use Bash as shell"
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# Make sure the app is installed
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test -d /etc/yunohost/apps/$app || ynh_die "$app is not an installed app ?!"
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# Make sure the app has its own user
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id -u "$app" &> /dev/null || ynh_die "There is no \"$app\" system user"
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# Make sure the app has an install_dir setting
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local install_dir=$(ynh_app_setting_get --app=$app --key=install_dir)
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[ -n "$install_dir" ] || ynh_die "$app has no install_dir setting (does it use packaging format >=2?)"
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# Load the app's service name, or default to $app
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local service=$(ynh_app_setting_get --app=$app --key=service)
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[ -z "$service" ] && service=$app
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# Export HOME variable
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export HOME=$install_dir
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# Load the Environment variables from the app's service
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local env_var=$(systemctl show $service.service -p "Environment" --value)
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[ -n "$env_var" ] && export $env_var
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# Force `php` to its intended version
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# We use `eval`+`export` since `alias` is not propagated to subshells, even with `export`
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local phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
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local phpflags=$(ynh_app_setting_get --app=$app --key=phpflags)
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if [ -n "$phpversion" ]; then
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eval "php() { php${phpversion} ${phpflags} \"\$@\"; }"
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export -f php
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fi
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# Source the EnvironmentFiles from the app's service
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local env_files=($(systemctl show $service.service -p "EnvironmentFiles" --value))
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if [ ${#env_files[*]} -gt 0 ]; then
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# set -/+a enables and disables new variables being automatically exported. Needed when using `source`.
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set -a
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for file in ${env_files[*]}; do
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[[ $file = /* ]] && source $file
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done
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set +a
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fi
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# Activate the Python environment, if it exists
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if [ -f $install_dir/venv/bin/activate ]; then
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# set -/+a enables and disables new variables being automatically exported. Needed when using `source`.
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set -a
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source $install_dir/venv/bin/activate
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set +a
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fi
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# cd into the WorkingDirectory set in the service, or default to the install_dir
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local env_dir=$(systemctl show $service.service -p "WorkingDirectory" --value)
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[ -z $env_dir ] && env_dir=$install_dir
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cd $env_dir
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# Spawn the app shell
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su -s /bin/bash $app
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}
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# Add swap
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#
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# usage: ynh_add_swap --size=SWAP in Mb
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# | arg: -s, --size= - Amount of SWAP to add in Mb.
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ynh_add_swap() {
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if systemd-detect-virt --container --quiet; then
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ynh_print_warn --message="You are inside a container/VM. swap will not be added, but that can cause troubles for the app $app. Please make sure you have enough RAM available."
|
|
return
|
|
fi
|
|
|
|
# Declare an array to define the options of this helper.
|
|
declare -Ar args_array=([s]=size=)
|
|
local size
|
|
# Manage arguments with getopts
|
|
ynh_handle_getopts_args "$@"
|
|
|
|
local swap_max_size=$(($size * 1024))
|
|
|
|
local free_space=$(df --output=avail / | sed 1d)
|
|
# Because we don't want to fill the disk with a swap file, divide by 2 the available space.
|
|
local usable_space=$(($free_space / 2))
|
|
|
|
SD_CARD_CAN_SWAP=${SD_CARD_CAN_SWAP:-0}
|
|
|
|
# Swap on SD card only if it's is specified
|
|
if ynh_is_main_device_a_sd_card && [ "$SD_CARD_CAN_SWAP" == "0" ]; then
|
|
ynh_print_warn --message="The main mountpoint of your system '/' is on an SD card, swap will not be added to prevent some damage of this one, but that can cause troubles for the app $app. If you still want activate the swap, you can relaunch the command preceded by 'SD_CARD_CAN_SWAP=1'"
|
|
return
|
|
fi
|
|
|
|
# Compare the available space with the size of the swap.
|
|
# And set a acceptable size from the request
|
|
if [ $usable_space -ge $swap_max_size ]; then
|
|
local swap_size=$swap_max_size
|
|
elif [ $usable_space -ge $(($swap_max_size / 2)) ]; then
|
|
local swap_size=$(($swap_max_size / 2))
|
|
elif [ $usable_space -ge $(($swap_max_size / 3)) ]; then
|
|
local swap_size=$(($swap_max_size / 3))
|
|
elif [ $usable_space -ge $(($swap_max_size / 4)) ]; then
|
|
local swap_size=$(($swap_max_size / 4))
|
|
else
|
|
echo "Not enough space left for a swap file" >&2
|
|
local swap_size=0
|
|
fi
|
|
|
|
# If there's enough space for a swap, and no existing swap here
|
|
if [ $swap_size -ne 0 ] && [ ! -e /swap_$app ]; then
|
|
# Create file
|
|
truncate -s 0 /swap_$app
|
|
|
|
# set the No_COW attribute on the swapfile with chattr
|
|
chattr +C /swap_$app
|
|
|
|
# Preallocate space for the swap file, fallocate may sometime not be used, use dd instead in this case
|
|
if ! fallocate -l ${swap_size}K /swap_$app; then
|
|
dd if=/dev/zero of=/swap_$app bs=1024 count=${swap_size}
|
|
fi
|
|
chmod 0600 /swap_$app
|
|
# Create the swap
|
|
mkswap /swap_$app
|
|
# And activate it
|
|
swapon /swap_$app
|
|
# Then add an entry in fstab to load this swap at each boot.
|
|
echo -e "/swap_$app swap swap defaults 0 0 #Swap added by $app" >> /etc/fstab
|
|
fi
|
|
}
|
|
|
|
ynh_del_swap() {
|
|
# If there a swap at this place
|
|
if [ -e /swap_$app ]; then
|
|
# Clean the fstab
|
|
sed -i "/#Swap added by $app/d" /etc/fstab
|
|
# Desactive the swap file
|
|
swapoff /swap_$app
|
|
# And remove it
|
|
rm /swap_$app
|
|
fi
|
|
}
|
|
|
|
# Check if the device of the main mountpoint "/" is an SD card
|
|
#
|
|
# [internal]
|
|
#
|
|
# return 0 if it's an SD card, else 1
|
|
ynh_is_main_device_a_sd_card() {
|
|
if [ "$(systemd-detect-virt)" != "none" ]; then
|
|
# Assume virtualization does not take place on SD card
|
|
return 1
|
|
fi
|
|
|
|
local main_device=$(lsblk --output PKNAME --noheadings $(findmnt / --nofsroot --uniq --output source --noheadings --first-only))
|
|
|
|
if echo $main_device | grep --quiet "mmc" && [ $(tail -n1 /sys/block/$main_device/queue/rotational) == "0" ]; then
|
|
return 0
|
|
else
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
# Check available space before creating a temp directory.
|
|
#
|
|
# usage: ynh_smart_mktemp --min_size="Min size"
|
|
#
|
|
# | arg: -s, --min_size= - Minimal size needed for the temporary directory, in Mb
|
|
ynh_smart_mktemp() {
|
|
# Declare an array to define the options of this helper.
|
|
declare -Ar args_array=([s]=min_size=)
|
|
local min_size
|
|
# Manage arguments with getopts
|
|
ynh_handle_getopts_args "$@"
|
|
|
|
min_size="${min_size:-300}"
|
|
# Transform the minimum size from megabytes to kilobytes
|
|
min_size=$(($min_size * 1024))
|
|
|
|
# Check if there's enough free space in a directory
|
|
is_there_enough_space() {
|
|
local free_space=$(df --output=avail "$1" | sed 1d)
|
|
test $free_space -ge $min_size
|
|
}
|
|
|
|
if is_there_enough_space /tmp; then
|
|
local tmpdir=/tmp
|
|
elif is_there_enough_space /var; then
|
|
local tmpdir=/var
|
|
elif is_there_enough_space /; then
|
|
local tmpdir=/
|
|
elif is_there_enough_space /home; then
|
|
local tmpdir=/home
|
|
else
|
|
ynh_die "Insufficient free space to continue..."
|
|
fi
|
|
|
|
echo "$(mktemp --directory --tmpdir="$tmpdir")"
|
|
}
|