From 6453a86022deaafd2baf62a7554bc1d417326aa2 Mon Sep 17 00:00:00 2001
From: Daniel Cohen Gindi <danielgindi@gmail.com>
Date: Mon, 15 Apr 2019 09:10:53 +0300
Subject: [PATCH] Allow custom magic to be specified through --sqlite_magic

---
 README.md        | 11 +++++++++++
 deps/sqlite3.gyp | 14 +++++++++++++-
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 0f7097d8e..699f9234d 100644
--- a/README.md
+++ b/README.md
@@ -99,6 +99,17 @@ This uses the npm_config_python config, so values in .npmrc will be honoured:
 
     python=/usr/bin/python2
 
+## Custom file header (magic)
+
+The default sqlite file header is "SQLite format 3".  
+You can specify a different magic, though this will make standard tools and libraries unable to work with your files.
+
+
+    npm install --build-from-source --sqlite_magic="MyCustomMagic15"
+
+
+Note that the magic *must* be exactly 15 characters long (16 bytes including null terminator).
+    
 ## Building for node-webkit
 
 Because of ABI differences, `sqlite3` must be built in a custom to be used with [node-webkit](https://github.com/rogerwang/node-webkit).
diff --git a/deps/sqlite3.gyp b/deps/sqlite3.gyp
index 3e7ea75b6..54440690f 100755
--- a/deps/sqlite3.gyp
+++ b/deps/sqlite3.gyp
@@ -1,5 +1,10 @@
 {
   'includes': [ 'common-sqlite.gypi' ],
+
+  'variables': {
+    'sqlite_magic%': '',
+  },
+
   'target_defaults': {
     'default_configuration': 'Release',
     'cflags':[
@@ -101,7 +106,14 @@
       ],
       'export_dependent_settings': [
         'action_before_build',
-      ]
+      ],
+      'conditions': [
+        ["sqlite_magic != ''", {
+            'defines': [
+              'SQLITE_FILE_HEADER="<(sqlite_magic)"'
+            ]
+        }]
+      ],
     }
   ]
 }