[enh] Update postfix conf_regen hook and simplify plain conf files copy

data/hooks/conf_regen-old/19-postfix

@@ -1,56 +0,0 @@
-set -e 
-
-force=$1
-
-function safe_copy () {
-    if [[ "$force" == "True" ]]; then
-        sudo yunohost service safecopy \
-          -s postfix \
-          $1 $2 \
-          --force
-    else
-        sudo yunohost service safecopy \
-          -s postfix \
-          $1 $2
-    fi
-}
-
-cd /usr/share/yunohost/templates/postfix
-
-# Copy plain single configuration files
-files="header_checks
-ldap-accounts.cf
-ldap-aliases.cf
-ldap-domains.cf
-master.cf
-sender_canonical
-smtp_reply_filter"
-
-for file in $files; do
-    safe_copy $file /etc/postfix/$file
-done
-
-main_domain=$(cat /etc/yunohost/current_host)
-
-# Replace main domain in the main configuration file
-cat main.cf.sed \
-  | sed "s/{{ main_domain }}/$main_domain/g" \
-  | sudo tee main.cf
-
-# And adapt it to IPv4-only hosts
-if [ ! -f /proc/net/if_inet6 ]; then
-    sudo sed -i \
-      's/ \[::ffff:127.0.0.0\]\/104 \[::1\]\/128//g' \
-      main.cf
-
-    sudo sed -i \
-      's/inet_interfaces = all/inet_interfaces = all\ninet_protocols = ipv4/' \
-      main.cf
-fi
-
-if [[ $(safe_copy main.cf /etc/postfix/main.cf) == "True" ]]; then
-    sudo service postfix restart
-else
-    sudo service postfix reload \
-      || sudo service postfix restart
-fi

data/hooks/conf_regen/19-postfix

@@ -0,0 +1,53 @@
+#!/bin/bash
+
+set -e 
+
+do_pre_regen() {
+  pending_dir=$1
+
+  cd /usr/share/yunohost/templates/postfix
+
+  postfix_dir="${pending_dir}/etc/postfix"
+  mkdir -p "$postfix_dir"
+
+  # install plain conf files
+  cp plain/* "$postfix_dir"
+
+  # prepare main.cf conf file
+  main_domain=$(cat /etc/yunohost/current_host)
+  cat main.cf \
+    | sed "s/{{ main_domain }}/${main_domain}/g" \
+    > "${postfix_dir}/main.cf"
+
+  # adapt it to IPv4-only hosts
+  if [ ! -f /proc/net/if_inet6 ]; then
+    sed -i \
+      's/ \[::ffff:127.0.0.0\]\/104 \[::1\]\/128//g' \
+      "${postfix_dir}/main.cf"
+    sed -i \
+      's/inet_interfaces = all/&\ninet_protocols = ipv4/' \
+      "${postfix_dir}/main.cf"
+  fi
+}
+
+do_post_regen() {
+  # TODO: only restart if conf changed
+  sudo service postfix restart
+}
+
+FORCE=$2
+
+case "$1" in
+  pre)
+    do_pre_regen $3
+    ;;
+  post)
+    do_post_regen
+    ;;
+  *)
+    echo "hook called with unknown argument \`$status'" >&2
+    exit 1
+    ;;
+esac
+
+exit 0