**
** This file contains code used to push, pull, and sync a repository
*/
#include "config.h"
#include "sync.h"
#include <assert.h>

#if INTERFACE
/*
** Flags used to determine which direction(s) an autosync goes in.
*/
#define AUTOSYNC_PUSH  1
#define AUTOSYNC_PULL  2

#endif /* INTERFACE */

/*
** If the repository is configured for autosyncing, then do an
** autosync.  This will be a pull if the argument is true or a push
** if the argument is false.
**
** Return the number of errors.
*/
int autosync(int flags){
  const char *zUrl;
  const char *zAutosync;
  const char *zPw;
  int rc;
  int configSync = 0;       /* configuration changes transferred */
  if( g.fNoSync ){
    return 0;
  }
  if( flags==AUTOSYNC_PUSH && db_get_boolean("dont-push",0) ){
  if( flags==SYNC_PUSH && db_get_boolean("dont-push",0) ){
    return 0;
  }
  zAutosync = db_get("autosync", 0);
  if( zAutosync ){
    if( (flags & AUTOSYNC_PUSH)!=0 && memcmp(zAutosync,"pull",4)==0 ){
    if( (flags & SYNC_PUSH)!=0 && memcmp(zAutosync,"pull",4)==0 ){
      return 0;   /* Do not auto-push when autosync=pullonly */
    }
    if( is_false(zAutosync) ){
      return 0;   /* Autosync is completely off */
    }
  }else{
    /* Autosync defaults on.  To make it default off, "return" here. */

    ** TODO:  What happens if the shun list gets really big? 
    ** Maybe the shunning list should only be pulled on every 10th
    ** autosync, or something?
    */
    configSync = CONFIGSET_SHUN;
  }
#endif
  if( find_option("verbose","v",0)!=0 ) flags |= SYNC_VERBOSE;
  fossil_print("Autosync:  %s\n", g.urlCanonical);
  url_enable_proxy("via proxy: ");
  rc = client_sync((flags & AUTOSYNC_PUSH)!=0, 1, 0, 0, configSync, 0);
  rc = client_sync(flags, configSync, 0);
  if( rc ) fossil_warning("Autosync failed");
  return rc;
}

/*
** This routine processes the command-line argument for push, pull,
** and sync.  If a command-line argument is given, that is the URL
** of a server to sync against.  If no argument is given, use the
** most recently synced URL.  Remember the current URL for next time.
*/
static void process_sync_args(int *pConfigSync, int *pPrivate){
static void process_sync_args(unsigned *pConfigFlags, unsigned *pSyncFlags){
  const char *zUrl = 0;
  const char *zPw = 0;
  int configSync = 0;
  unsigned configSync = 0;
  int urlOptional = find_option("autourl",0,0)!=0;
  g.dontKeepUrl = find_option("once",0,0)!=0;
  *pPrivate = find_option("private",0,0)!=0;
  if( find_option("private",0,0)!=0 ){
    *pSyncFlags |= SYNC_PRIVATE;
  }
  if( find_option("verbose","v",0)!=0 ){
    *pSyncFlags |= SYNC_VERBOSE;
  }
  url_proxy_options();
  db_find_and_open_repository(0, 0);
  db_open_config(0);
  if( g.argc==2 ){
    zUrl = db_get("last-sync-url", 0);
    zPw = unobscure(db_get("last-sync-pw", 0));
    if( db_get_boolean("auto-shun",1) ) configSync = CONFIGSET_SHUN;

  }
  if( !g.dontKeepUrl ){
    db_set("last-sync-url", g.urlCanonical, 0);
    if( g.urlPasswd ) db_set("last-sync-pw", obscure(g.urlPasswd), 0);
  }
  user_select();
  if( g.argc==2 ){
    if( ((*pSyncFlags) & (SYNC_PUSH|SYNC_PULL))==(SYNC_PUSH|SYNC_PULL) ){
      fossil_print("Sync with %s\n", g.urlCanonical);
    }else if( (*pSyncFlags) & SYNC_PUSH ){
    fossil_print("Server:    %s\n", g.urlCanonical);
  }
      fossil_print("Push to %s\n", g.urlCanonical);
    }else if( (*pSyncFlags) & SYNC_PULL ){
      fossil_print("Pull from %s\n", g.urlCanonical);
    }
  }
  url_enable_proxy("via proxy: ");
  *pConfigSync = configSync;
  *pConfigFlags |= configSync;
}

/*
** COMMAND: pull
**
** Usage: %fossil pull ?URL? ?options?
**

**
** Use the --private option to pull private branches from the
** remote repository.
**
** See also: clone, push, sync, remote-url
*/
void pull_cmd(void){
  unsigned configFlags = 0;
  int syncFlags;
  unsigned syncFlags = SYNC_PULL;
  int bPrivate;
  process_sync_args(&syncFlags, &bPrivate);
  client_sync(0,1,0,bPrivate,syncFlags,0);
  process_sync_args(&configFlags, &syncFlags);
  client_sync(syncFlags, configFlags, 0);
}

/*
** COMMAND: push
**
** Usage: %fossil push ?URL? ?options?
**

**
** Use the --private option to push private branches to the
** remote repository.
**
** See also: clone, pull, sync, remote-url
*/
void push_cmd(void){
  unsigned configFlags = 0;
  int syncFlags;
  unsigned syncFlags = SYNC_PUSH;
  int bPrivate;
  process_sync_args(&syncFlags, &bPrivate);
  process_sync_args(&configFlags, &syncFlags);
  if( db_get_boolean("dont-push",0) ){
    fossil_fatal("pushing is prohibited: the 'dont-push' option is set");
  }
  client_sync(1,0,0,bPrivate,0,0);
  client_sync(syncFlags, 0, 0);
}


/*
** COMMAND: sync
**
** Usage: %fossil sync ?URL? ?options?

**
** Use the --private option to sync private branches with the
** remote repository.
**
** See also:  clone, push, pull, remote-url
*/
void sync_cmd(void){
  int syncFlags;
  unsigned configFlags = 0;
  int bPrivate;
  int pushFlag = 1;
  process_sync_args(&syncFlags, &bPrivate);
  if( db_get_boolean("dont-push",0) ) pushFlag = 0;
  client_sync(pushFlag,1,0,bPrivate,syncFlags,0);
  if( pushFlag==0 ){
  unsigned syncFlags = SYNC_PUSH|SYNC_PULL;
  process_sync_args(&configFlags, &syncFlags);
  if( db_get_boolean("dont-push",0) ) syncFlags &= ~SYNC_PUSH;
  client_sync(syncFlags, configFlags, 0);
  if( (syncFlags & SYNC_PUSH)==0 ){
    fossil_warning("pull only: the 'dont-push' option is set");
  }
}

/*
** COMMAND: remote-url
**