break hardcoded database credentials out of script

.gitignore

@@ -2,3 +2,4 @@
 html-src/
 ebooks/
 *.csv
+env

db_update.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -a
+source ./env
+set +a
+user=$DB_USER password=$DB_PASSWORD host=$DB_HOST database=$DB_DATABASE ./db_update.py

env.template

@@ -0,0 +1,4 @@
+DB_USER=<user>
+DB_PASSWORD=<password>
+DB_HOST=<server>
+DB_DATABASE=<database>

gutenberg_mirror.sql

@@ -40,6 +40,7 @@ CREATE TABLE `books` (
   `book_id` int(11) NOT NULL,
   `title` varchar(256) NOT NULL,
   `locc` varchar(16) DEFAULT NULL,
+  `epub` bit not null default 0,
   PRIMARY KEY (`book_id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci;
 /*!40101 SET character_set_client = @saved_cs_client */;

html_to_epub.sh

@@ -1,5 +1,9 @@
 #!/usr/bin/env bash
 
+set -a
+source ./env
+set +a
+
 for srcdir in $(find html-src -name \*-h -type d)
 do 
   srcfile=$(echo $srcdir/$(basename $srcdir).htm)
@@ -12,9 +16,10 @@ do
     docker run -it --rm -v $(pwd):/data cr.gitlab.alfter.us/salfter/ebookmaker --make kindle.images --generate_cover --output-dir /data/$destpath /data/$srcfile 2>&1 >/dev/null
     coverfile=$(ls $destpath/*.png) 
     docker run -it --rm -v $(pwd):/data cr.gitlab.alfter.us/salfter/ebookmaker --make kindle.images --cover /data/$coverfile --output-dir /data/$destpath /data/$srcfile 2>&1 >/dev/null
-    rm $destpath/$prefix.epub $destpath/$prefix.mobi 2>&1 >/dev/null
+    rm -f $destpath/$prefix.epub $destpath/$prefix.mobi 2>&1 >/dev/null
     mv $destpath/*.epub $destpath/$prefix.epub
     mv $destpath/*.mobi $destpath/$prefix.mobi
     rm -f $coverfile 2>&1 >/dev/null
+    echo update books set epub=1 where book_id=$prefix\; | mariadb -h $DB_HOST -u $DB_USER --password=$DB_PASSWORD $DB_DATABASE
   fi
 done