From 397ee7d420ba60df3d0bca4a2306917e8cd1955a Mon Sep 17 00:00:00 2001
From: "E. S." <the@rootless.one>
Date: Sun, 28 Apr 2024 23:44:20 +0300
Subject: [PATCH] update old versions tree format

---
 release-book.sh | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/release-book.sh b/release-book.sh
index 012ef68..b5c06f8 100755
--- a/release-book.sh
+++ b/release-book.sh
@@ -12,6 +12,14 @@ usage() {
 	>&2 echo "usage: $0 <filename> en|ru <new_version_number>"
 }
 
+mkdir_if_needed() {
+	[ -d "$1" ] || {
+		mkdir "$1"
+		chmod 755 "$1"
+		chgrp www-data "$1"
+	}
+}
+
 [ $# -ne 3 ] && { usage; exit 1; }
 
 INPUT="$1"
@@ -19,19 +27,17 @@ LANG="$2"
 VERSION="$3"
 
 case $LANG in
-    en|ru) : ;;
-    *) fatal "invalid language" ;;
+	en|ru) : ;;
+	*) fatal "invalid language" ;;
 esac
 
 previous_version=$(( VERSION-1 ))
 target_file="$FILES_DIR/4in1-$LANG.pdf"
-archive_target_file="$ARCHIVE_DIR/4in1-$LANG-update$previous_version.pdf"
+previous_date=$(date -r "$target_file" +"%Y%m%d")
+archive_target_file="$ARCHIVE_DIR/$LANG/4in1-${LANG}_rev.${previous_version}_${previous_date}.pdf"
 
-[ -d "$ARCHIVE_DIR" ] || {
-	mkdir "$ARCHIVE_DIR"
-	chmod 755 "$ARCHIVE_DIR"
-	chgrp www-data "$ARCHIVE_DIR"
-}
+mkdir_if_needed "$ARCHIVE_DIR"
+mkdir_if_needed "$ARCHIVE_DIR/$LANG"
 
 [ -e "$archive_target_file" ] && fatal "invalid version: file \"$archive_target_file\" already exists"