Mac TimeMachine File Exclusions

third_party/sqlite/mac_time_machine.patch

+Index: src/pager.c
+===================================================================
+--- src/pager.c (revision 86426)
++++ src/pager.c (working copy)
+@@ -122,6 +122,11 @@
+ #define MAX_SECTOR_SIZE 0x10000
+ 
+ /*
++** The string appended to the database file name giving the journal file name.
++*/
++const char kPagerJournalSuffix[] = "-journal\0";
++
++/*
+ ** An instance of the following structure is allocated for each active
+ ** savepoint and statement transaction in the system. All such structures
+ ** are stored in the Pager.aSavepoint[] array, which is allocated and
+@@ -3222,7 +3227,8 @@
+     pPager->zJournal =   (char*)(pPtr += nPathname + 1);
+     memcpy(pPager->zFilename, zPathname, nPathname);
+     memcpy(pPager->zJournal, zPathname, nPathname);
+-    memcpy(&pPager->zJournal[nPathname], "-journal", 8);
++    memcpy(&pPager->zJournal[nPathname], kPagerJournalSuffix,
++           strlen(kPagerJournalSuffix));
+     if( pPager->zFilename[0]==0 ) pPager->zJournal[0] = 0;
+     sqlite3_free(zPathname);
+   }
+@@ -3990,6 +3996,11 @@
+   return rc;
+ }
+ 
++#if defined(__APPLE__)
++#include <CoreServices/CoreServices.h>
++#include <CoreFoundation/CoreFoundation.h>
++#endif
++
+ /*
+ ** This function is called at the start of every write transaction.
+ ** There must already be a RESERVED or EXCLUSIVE lock on the database 
+@@ -4055,6 +4066,38 @@
+ #else
+       rc = sqlite3OsOpen(pVfs, pPager->zJournal, pPager->jfd, flags, 0);
+ #endif
++#if defined(__APPLE__)
++      if( rc == SQLITE_OK && pPager->zJournal ) {
++        // Set the TimeMachine exclusion metadata for the journal if it has
++        // been set for the database.
++        int database_path_len =
++            strlen(pPager->zJournal) - strlen(kPagerJournalSuffix) + 1;
++        char *database_path = sqlite3Malloc(database_path_len);
++        strlcpy(database_path, pPager->zJournal, database_path_len);
++        CFURLRef database_url =
++            CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
++                CFStringCreateWithCStringNoCopy(kCFAllocatorDefault,
++                    database_path, kCFStringEncodingMacRoman, kCFAllocatorNull),
++                kCFURLPOSIXPathStyle, false);
++        sqlite3_free(database_path);
++        if( CSBackupIsItemExcluded(database_url, NULL) ){
++          CFURLRef journal_url =
++              CFURLCreateWithFileSystemPath(kCFAllocatorDefault,
++                  CFStringCreateWithCStringNoCopy(kCFAllocatorDefault,
++                      pPager->zJournal, kCFStringEncodingMacRoman,
++                      kCFAllocatorNull),
++                  kCFURLPOSIXPathStyle, false);
++          OSStatus err = CSBackupSetItemExcluded(journal_url, TRUE, FALSE);
++          CFRelease(journal_url);
++          if( err != noErr ){
++            fprintf(stderr, "CSBackupSetItemExcluded(\"%s\", TRUE, FALSE): %d",
++                pPager->zJournal, (int)err);
++            // DO NOT set rc to an error code -- ignore exclusion errors.
++          }
++        }
++        CFRelease(database_url);
++      }
++#endif
+     }
+     assert( rc!=SQLITE_OK || isOpen(pPager->jfd) );
+   }
+Index: ext/fts3/fts3_porter.c
+===================================================================
+--- ext/fts3/fts3_porter.c      (revision 86426)
++++ ext/fts3/fts3_porter.c      (working copy)
+@@ -126,7 +126,7 @@
+ /*
+ ** Vowel or consonant
+ */
+-static const char cType[] = {
++static const char vOrCType[] = {
+    0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0,
+    1, 1, 1, 2, 1
+ };
+@@ -150,7 +150,7 @@
+   char x = *z;
+   if( x==0 ) return 0;
+   assert( x>='a' && x<='z' );
+-  j = cType[x-'a'];
++  j = vOrCType[x-'a'];
+   if( j<2 ) return j;
+   return z[1]==0 || isVowel(z + 1);
+ }
+@@ -159,7 +159,7 @@
+   char x = *z;
+   if( x==0 ) return 0;
+   assert( x>='a' && x<='z' );
+-  j = cType[x-'a'];
++  j = vOrCType[x-'a'];
+   if( j<2 ) return 1-j;
+   return isConsonant(z + 1);
+ }