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haste_ynh/scripts/_common.sh

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# INFOS
# n (Node version management) utilise la variable PATH pour stocker le path de la version de node à utiliser.
# C'est ainsi qu'il change de version
# ynh_install_nodejs installe la version de nodejs demandée en argument, avec n
# ynh_use_nodejs active une version de nodejs dans le script courant
# 3 variables sont mises à disposition, et 2 sont stockées dans la config de l'app
# - nodejs_path: Le chemin absolu de cette version de node
# Utilisé pour des appels directs à node.
# - nodejs_version: Simplement le numéro de version de nodejs pour cette application
# - nodejs_use_version: Un alias pour charger une version de node dans le shell courant.
# Utilisé pour démarrer un service ou un script qui utilise node ou npm
# Dans ce cas, c'est $PATH qui contient le chemin de la version de node. Il doit être propagé sur les autres shell si nécessaire.
n_install_dir="/opt/node_n"
node_version_path="/opt/node_n/n/versions/node"
# N_PREFIX est le dossier de n, il doit être chargé dans les variables d'environnement pour n.
export N_PREFIX="$n_install_dir"
ynh_use_nodejs () {
nodejs_version=$(ynh_app_setting_get $app nodejs_version)
load_n_path="[[ :$PATH: == *\":$n_install_dir/bin:\"* ]] || PATH=\"$n_install_dir/bin:$PATH\"; N_PREFIX="$n_install_dir""
nodejs_use_version="$n_install_dir/bin/n -q $nodejs_version"
# "Load" a version of node
eval $load_n_path; $nodejs_use_version
# Get the absolute path of this version of node
nodejs_path="$(n bin $nodejs_version)"
# Make an alias for node use
ynh_node_exec="eval $load_n_path; n use $nodejs_version"
}
ynh_install_nodejs () {
# Use n, https://github.com/tj/n to manage the nodejs versions
nodejs_version="$1"
local n_install_script="https://git.io/n-install"
# Create $n_install_dir
mkdir -p "$n_install_dir"
# Load n path in PATH
CLEAR_PATH="$n_install_dir/bin:$PATH"
# Remove /usr/local/bin in PATH in case of node has already setup.
PATH=$(echo $CLEAR_PATH | sed 's@/usr/local/bin:@@')
# Move an existing node binary, to avoid to block n.
test -x /usr/bin/node && mv /usr/bin/node /usr/bin/node_n
test -x /usr/bin/npm && mv /usr/bin/npm /usr/bin/npm_n
# If n is not previously setup, install it
n --version > /dev/null 2>&1 || \
( echo "Installation of N - Node.js version management" >&2; \
curl -sL $n_install_script | N_PREFIX=$N_PREFIX bash -s -- -y - 2>&1 )
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# Modify the default N_PREFIX in n script
ynh_replace_string "^N_PREFIX=\${N_PREFIX-.*}$" "N_PREFIX=\${N_PREFIX-$N_PREFIX}" "$n_install_dir/bin/n"
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# Restore /usr/local/bin in PATH
PATH=$CLEAR_PATH
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# And replace the old node binary.
test -x /usr/bin/node_n && mv /usr/bin/node_n /usr/bin/node
test -x /usr/bin/npm_n && mv /usr/bin/npm_n /usr/bin/npm
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# Install the requested version of nodejs
n $nodejs_version
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# Find the last "real" version for this major version of node.
real_nodejs_version=$(find $node_version_path/$nodejs_version* -maxdepth 0 | sort --version-sort | tail --lines=1)
real_nodejs_version=$(basename $real_nodejs_version)
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# Create a symbolic link for this major version. If the file doesn't already exist
if [ ! -e "$node_version_path/$nodejs_version" ]
then
ln --symbolic --force --no-target-directory $node_version_path/$real_nodejs_version $node_version_path/$nodejs_version
fi
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# Store the ID of this app and the version of node requested for it
echo "$YNH_APP_ID:$nodejs_version" | tee --append "$n_install_dir/ynh_app_version"
# Store nodejs_version into the config of this app
ynh_app_setting_set $app nodejs_version $nodejs_version
# Build the update script and set the cronjob
ynh_cron_upgrade_node
ynh_use_nodejs
}
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ynh_remove_nodejs () {
ynh_use_nodejs
# Remove the line for this app
sed --in-place "/$YNH_APP_ID:$nodejs_version/d" "$n_install_dir/ynh_app_version"
# If none another app uses this version of nodejs, remove it.
if ! grep --quiet "$nodejs_version" "$n_install_dir/ynh_app_version"
then
n rm $nodejs_version
fi
# If none another app uses n, remove n
if [ ! -s "$n_install_dir/ynh_app_version" ]
then
ynh_secure_remove "$n_install_dir"
ynh_secure_remove "/usr/local/n"
sed --in-place "/N_PREFIX/d" /root/.bashrc
fi
}
ynh_cron_upgrade_node () {
# Build the update script
cat > "$n_install_dir/node_update.sh" << EOF
#!/bin/bash
version_path="$node_version_path"
n_install_dir="$n_install_dir"
# Log the date
date
# List all real installed version of node
all_real_version="\$(find \$version_path/* -maxdepth 0 -type d | sed "s@\$version_path/@@g")"
# Keep only the major version number of each line
all_real_version=\$(echo "\$all_real_version" | sed 's/\..*\$//')
# Remove double entries
all_real_version=\$(echo "\$all_real_version" | sort --unique)
# Read each major version
while read version
do
echo "Update of the version \$version"
sudo \$n_install_dir/bin/n \$version
# Find the last "real" version for this major version of node.
real_nodejs_version=\$(find \$version_path/\$version* -maxdepth 0 | sort --version-sort | tail --lines=1)
real_nodejs_version=\$(basename \$real_nodejs_version)
# Update the symbolic link for this version
sudo ln --symbolic --force --no-target-directory \$version_path/\$real_nodejs_version \$version_path/\$version
done <<< "\$(echo "\$all_real_version")"
EOF
chmod +x "$n_install_dir/node_update.sh"
# Build the cronjob
cat > "/etc/cron.daily/node_update" << EOF
#!/bin/bash
$n_install_dir/node_update.sh >> $n_install_dir/node_update.log
EOF
chmod +x "/etc/cron.daily/node_update"
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}