add go helper

scripts/install

@@ -7,6 +7,7 @@
 #=================================================
 
 source _common.sh
+source ynh_install_go
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -14,7 +15,8 @@ source /usr/share/yunohost/helpers
 #=================================================
 ynh_script_progression --message="Installing Go Lang..." --weight=1
 
-install_golang_from_backports
+ynh_exec_warn_less ynh_install_go --go_version=$go_version
+ynh_use_go
 
 ynh_script_progression --message="Installing Node JS..." --weight=1
 

scripts/remove

@@ -7,6 +7,7 @@
 #=================================================
 
 source _common.sh
+source ynh_install_go
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -53,6 +54,8 @@ ynh_script_progression --message="Removing dependencies..." --weight=1
 
 ynh_remove_nodejs
 
+ynh_remove_go
+
 #=================================================
 # SPECIFIC REMOVE
 #=================================================

scripts/ynh_install_go

@@ -0,0 +1,247 @@
+#!/bin/bash
+
+ynh_go_try_bash_extension() {
+  if [ -x src/configure ]; then
+    src/configure && make -C src || {
+      ynh_print_info --message="Optional bash extension failed to build, but things will still work normally."
+    }
+  fi
+}
+
+goenv_install_dir="/opt/goenv"
+go_version_path="$goenv_install_dir/versions"
+# goenv_ROOT is the directory of goenv, it needs to be loaded as a environment variable.
+export GOENV_ROOT="$goenv_install_dir"
+
+# Load the version of Go for an app, and set variables.
+#
+# ynh_use_go has to be used in any app scripts before using Go for the first time.
+# This helper will provide alias and variables to use in your scripts.
+#
+# To use gem or Go, use the alias `ynh_gem` and `ynh_go`
+# Those alias will use the correct version installed for the app
+# For example: use `ynh_gem install` instead of `gem install`
+#
+# With `sudo` or `ynh_exec_as`, use instead the fallback variables `$ynh_gem` and `$ynh_go`
+# And propagate $PATH to sudo with $ynh_go_load_path
+# Exemple: `ynh_exec_as $app $ynh_go_load_path $ynh_gem install`
+#
+# $PATH contains the path of the requested version of Go.
+# However, $PATH is duplicated into $go_path to outlast any manipulation of $PATH
+# You can use the variable `$ynh_go_load_path` to quickly load your Go version
+#  in $PATH for an usage into a separate script.
+# Exemple: $ynh_go_load_path $install_dir/script_that_use_gem.sh`
+#
+#
+# Finally, to start a Go service with the correct version, 2 solutions
+#  Either the app is dependent of Go or gem, but does not called it directly.
+#  In such situation, you need to load PATH
+#    `Environment="__YNH_GO_LOAD_PATH__"`
+#    `ExecStart=__INSTALL_DIR__/my_app`
+#     You will replace __YNH_GO_LOAD_PATH__ with $ynh_go_load_path
+#
+#  Or Go start the app directly, then you don't need to load the PATH variable
+#    `ExecStart=__YNH_GO__ my_app run`
+#     You will replace __YNH_GO__ with $ynh_go
+#
+#
+# one other variable is also available
+#   - $go_path: The absolute path to Go binaries for the chosen version.
+#
+# usage: ynh_use_go
+#
+# Requires YunoHost version 3.2.2 or higher.
+ynh_use_go () {
+    go_version=$(ynh_app_setting_get --app=$app --key=go_version)
+
+    # Get the absolute path of this version of Go
+    go_path="$go_version_path/$go_version/bin"
+
+    # Allow alias to be used into bash script
+    shopt -s expand_aliases
+
+    # Create an alias for the specific version of Go and a variable as fallback
+    ynh_go="$go_path/go"
+    alias ynh_go="$ynh_go"
+
+    # Load the path of this version of Go in $PATH
+    if [[ :$PATH: != *":$go_path"* ]]; then
+        PATH="$go_path:$PATH"
+    fi
+    # Create an alias to easily load the PATH
+    ynh_go_load_path="PATH=$PATH"
+
+    # Sets the local application-specific Go version
+    pushd $install_dir
+        $goenv_install_dir/bin/goenv local $go_version
+    popd
+}
+
+# Install a specific version of Go
+#
+# ynh_install_go will install the version of Go provided as argument by using goenv.
+#
+# This helper creates a /etc/profile.d/goenv.sh that configures PATH environment for goenv
+# for every LOGIN user, hence your user must have a defined shell (as opposed to /usr/sbin/nologin)
+#
+# Don't forget to execute go-dependent command in a login environment
+# (e.g. sudo --login option)
+# When not possible (e.g. in systemd service definition), please use direct path
+# to goenv shims (e.g. $goenv_ROOT/shims/bundle)
+#
+# usage: ynh_install_go --go_version=go_version
+# | arg: -v, --go_version= - Version of go to install.
+#
+# Requires YunoHost version 3.2.2 or higher.
+ynh_install_go () {
+    # Declare an array to define the options of this helper.
+    local legacy_args=v
+    local -A args_array=( [v]=go_version= )
+    local go_version
+    # Manage arguments with getopts
+    ynh_handle_getopts_args "$@"
+
+    # Load goenv path in PATH
+    local CLEAR_PATH="$goenv_install_dir/bin:$PATH"
+
+    # Remove /usr/local/bin in PATH in case of Go prior installation
+    PATH=$(echo $CLEAR_PATH | sed 's@/usr/local/bin:@@')
+
+    # Move an existing Go binary, to avoid to block goenv
+    test -x /usr/bin/go && mv /usr/bin/go /usr/bin/go_goenv
+
+    # Install or update goenv
+    goenv="$(command -v goenv $goenv_install_dir/bin/goenv | head -1)"
+    if [ -n "$goenv" ]; then
+        ynh_print_info --message="goenv already seems installed in \`$goenv'."
+        pushd "${goenv%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/syndbg/goenv.git"; then
+                echo "Trying to update with git..."
+                git pull -q --tags origin master
+                cd ..
+                ynh_go_try_bash_extension
+            fi
+        popd
+    else
+        #ynh_print_info --message="Installing goenv with Git..."
+        mkdir -p $goenv_install_dir
+        pushd $goenv_install_dir
+            git init -q
+            git remote add -f -t master origin https://github.com/syndbg/goenv.git > /dev/null 2>&1
+            git checkout -q -b master origin/master
+            ynh_go_try_bash_extension
+            goenv=$goenv_install_dir/bin/goenv
+        popd
+    fi
+
+    goenv_latest="$(command -v "$goenv_install_dir"/plugins/*/bin/goenv-latest goenv-latest | head -1)"
+    if [ -n "$goenv_latest" ]; then
+        ynh_print_info --message="\`goenv latest' command already available in \`$goenv_latest'."
+        pushd "${goenv_latest%/*/*}"
+            if git remote -v 2>/dev/null | grep "https://github.com/momo-lab/xxenv-latest.git"; then
+                ynh_print_info --message="Trying to update xxenv-latest with Git..."
+                git pull -q origin master
+            fi
+        popd
+    else
+        #ynh_print_info --message="Installing xxenv-latest with Git..."
+        mkdir -p "${goenv_install_dir}/plugins"
+        git clone -q https://github.com/momo-lab/xxenv-latest.git "${goenv_install_dir}/plugins/xxenv-latest"
+    fi
+
+    # Enable caching
+    mkdir -p "${goenv_install_dir}/cache"
+
+    # Create shims directory if needed
+    mkdir -p "${goenv_install_dir}/shims"
+
+    # Restore /usr/local/bin in PATH
+    PATH=$CLEAR_PATH
+
+    # And replace the old Go binary
+    test -x /usr/bin/go_goenv && mv /usr/bin/go_goenv /usr/bin/go
+
+    # Install the requested version of Go
+    local final_go_version=$(goenv latest --print $go_version)
+    #ynh_print_info --message="Installation of Go-$final_go_version"
+    goenv install --skip-existing $final_go_version
+
+    # Store go_version into the config of this app
+    ynh_app_setting_set --app=$YNH_APP_INSTANCE_NAME --key=go_version --value=$final_go_version
+
+    # Cleanup Go versions
+    ynh_cleanup_go
+
+    # Set environment for Go users
+    echo  "#goenv
+export GOENV_ROOT=$goenv_install_dir
+export PATH=\"$goenv_install_dir/bin:$PATH\"
+eval \"\$(goenv init -)\"
+#goenv" > /etc/profile.d/goenv.sh
+
+    # Load the environment
+    eval "$(goenv init -)"
+}
+
+# Remove the version of Go used by the app.
+#
+# This helper will also cleanup Go versions
+#
+# usage: ynh_remove_go
+ynh_remove_go () {
+    local go_version=$(ynh_app_setting_get --app=$YNH_APP_INSTANCE_NAME --key=go_version)
+
+    # Load goenv path in PATH
+    local CLEAR_PATH="$goenv_install_dir/bin:$PATH"
+
+    # Remove /usr/local/bin in PATH in case of Go prior installation
+    PATH=$(echo $CLEAR_PATH | sed 's@/usr/local/bin:@@')
+
+    # Remove the line for this app
+    ynh_app_setting_delete --app=$YNH_APP_INSTANCE_NAME --key=go_version
+
+    # Cleanup Go versions
+    ynh_cleanup_go
+}
+
+# Remove no more needed versions of Go used by the app.
+#
+# This helper will check what Go version are no more required,
+# and uninstall them
+# If no app uses Go, goenv will be also removed.
+#
+# usage: ynh_cleanup_go
+ynh_cleanup_go () {
+
+    # List required Go versions
+    local installed_apps=$(yunohost app list --output-as json --quiet | jq -r .apps[].id)
+    local required_go_versions=""
+    for installed_app in $installed_apps
+    do
+        local installed_app_go_version=$(ynh_app_setting_get --app=$installed_app --key="go_version")
+        if [[ $installed_app_go_version ]]
+        then
+            required_go_versions="${installed_app_go_version}\n${required_go_versions}"
+        fi
+    done
+    
+    # Remove no more needed Go versions
+    local installed_go_versions=$(goenv versions --bare --skip-aliases | grep -Ev '/')
+    for installed_go_version in $installed_go_versions
+    do
+        if ! `echo ${required_go_versions} | grep "${installed_go_version}" 1>/dev/null 2>&1`
+        then
+            #ynh_print_info --message="Removing of Go-$installed_go_version"
+            $goenv_install_dir/bin/goenv uninstall --force $installed_go_version
+        fi
+    done
+
+    # If none Go version is required
+    if [[ ! $required_go_versions ]]
+    then
+        # Remove goenv environment configuration
+        #ynh_print_info --message="Removing of goenv"
+        ynh_secure_remove --file="$goenv_install_dir"
+        ynh_secure_remove --file="/etc/profile.d/goenv.sh"
+    fi
+}