From 61a59a41ded661187ddd52a33c184077c9f19cc4 Mon Sep 17 00:00:00 2001
From: Rodrigo Ramos <rodrigo.ramos.santos@gmail.com>
Date: Tue, 7 Sep 2021 17:09:43 -0300
Subject: [PATCH 1/2] added option to attach a database

---
 docker-entrypoint-initdb.sh | 45 +++++++++++++++++++++++++++----------
 readme.md                   |  6 +++++
 2 files changed, 39 insertions(+), 12 deletions(-)

diff --git a/docker-entrypoint-initdb.sh b/docker-entrypoint-initdb.sh
index 17e225d..f47a032 100644
--- a/docker-entrypoint-initdb.sh
+++ b/docker-entrypoint-initdb.sh
@@ -5,18 +5,39 @@
 if [ ! -f ~/init.lock ]; then
 
     # wait for database to start...
-    for i in {40..0}; do
-      if /opt/mssql-tools/bin/sqlcmd -U SA -P $SA_PASSWORD -Q 'SELECT 1;' &> /dev/null; then
-        echo "$0: SQL Server started"
-        break
-      fi
-      echo "$0: SQL Server startup in progress..."
-      sleep 1
-    done
-
-    echo "$0: Initializing database"
-
-    touch ~/tmp.sql
+  for i in {60..0}; do
+    if /opt/mssql-tools/bin/sqlcmd -U SA -P $SA_PASSWORD -Q 'SELECT 1;' &> /dev/null; then
+      echo "$0: SQL Server started"
+      break
+    fi
+    echo "$0: SQL Server startup in progress..."
+    sleep 1
+  done
+
+  echo "$0: Initializing database"
+
+  touch ~/tmp.sql
+
+  if [ "$MSSQL_ATTACH_DATABASE_NAME" -a "$MSSQL_ATTACH_DATABASE_PATH" ]; then
+    
+    touch ~/attach_tmp.sql
+    cat > ~/attach_tmp.sql <<-EOATTACHSQL
+    USE [master]
+    GO
+    
+    CREATE DATABASE [${MSSQL_ATTACH_DATABASE_NAME}] ON 
+    ( FILENAME = N'${MSSQL_ATTACH_DATABASE_PATH}/${MSSQL_ATTACH_DATABASE_NAME}.mdf' ),
+    ( FILENAME = N'${MSSQL_ATTACH_DATABASE_PATH}/${MSSQL_ATTACH_DATABASE_NAME}_log.ldf' )
+    FOR ATTACH
+    
+    GO
+        
+EOATTACHSQL
+
+    /opt/mssql-tools/bin/sqlcmd -U SA -P $SA_PASSWORD -i ~/attach_tmp.sql
+
+    rm -f ~/attach_tmp.sql
+  fi
 
   #BEGIN DATABASE CREATION
   if [ "$MSSQL_DATABASE" ]; then
diff --git a/readme.md b/readme.md
index f78901b..c126705 100644
--- a/readme.md
+++ b/readme.md
@@ -57,6 +57,12 @@ MSSQL_PID is the Product ID (PID) or Edition that the container will run with. A
 
 This image extends official mssql-server-linux. See more on [official **mssql-server-linux** image](https://hub.docker.com/r/microsoft/mssql-server-linux/) to understand license and find other Product Id's.
 
+### **MSSQL_ATTACH_DATABASE_NAME** and **MSSQL_ATTACH_DATABASE_PATH**
+These environment variables are optional, used to attach a database to server. 
+- **MSSQL_ATTACH_DATABASE_NAME** indicates the name of database **and** is used to determine the name of the ``.mdf`` and ``.ldf`` files;
+- **MSSQL_ATTACH_DATABASE_PATH** indicates the base path of the ``.mdf`` and ``.ldf`` files;
+
+For example, using **MSSQL_ATTACH_DATABASE_NAME** = MyDatabase and **MSSQL_ATTACH_DATABASE_PATH** = /var/opt/mssql/data/custom-location/ will attach a database named **MyDatabase** thas uses **/var/opt/mssql/data/custom-location/MyDatabase**.mdf and **/var/opt/mssql/data/custom-location/MyDatabase**_log.ldf files; 
 
 ## Volumes
 

From 0d22a5919d72d3d07f769c9f92d2bd619599653b Mon Sep 17 00:00:00 2001
From: Rodrigo Ramos dos Santos <rodrigo.ramos.santos@gmail.com>
Date: Tue, 7 Sep 2021 17:22:32 -0300
Subject: [PATCH 2/2] Adjusting readme

---
 readme.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/readme.md b/readme.md
index c126705..8c7da55 100644
--- a/readme.md
+++ b/readme.md
@@ -62,7 +62,8 @@ These environment variables are optional, used to attach a database to server.
 - **MSSQL_ATTACH_DATABASE_NAME** indicates the name of database **and** is used to determine the name of the ``.mdf`` and ``.ldf`` files;
 - **MSSQL_ATTACH_DATABASE_PATH** indicates the base path of the ``.mdf`` and ``.ldf`` files;
 
-For example, using **MSSQL_ATTACH_DATABASE_NAME** = MyDatabase and **MSSQL_ATTACH_DATABASE_PATH** = /var/opt/mssql/data/custom-location/ will attach a database named **MyDatabase** thas uses **/var/opt/mssql/data/custom-location/MyDatabase**.mdf and **/var/opt/mssql/data/custom-location/MyDatabase**_log.ldf files; 
+#### Example
+Using `MSSQL_ATTACH_DATABASE_NAME = MyDatabase` and `MSSQL_ATTACH_DATABASE_PATH = /var/opt/mssql/data/custom-location/` will attach a database named **MyDatabase** thas uses **/var/opt/mssql/data/custom-location/MyDatabase**.mdf and **/var/opt/mssql/data/custom-location/MyDatabase**_log.ldf files; 
 
 ## Volumes