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

/*
** Explain what type of sync operation is about to occur
*/
static void sync_explain(unsigned syncFlags){
  if( g.url.isAlias ){
    if( (syncFlags & (SYNC_PUSH|SYNC_PULL))==(SYNC_PUSH|SYNC_PULL) ){
      fossil_print("Sync with %s\n", g.url.canonical);
    }else if( syncFlags & SYNC_PUSH ){
      fossil_print("Push to %s\n", g.url.canonical);
    }else if( syncFlags & SYNC_PULL ){
      fossil_print("Pull from %s\n", g.url.canonical);
    }
  }
}


/*
** Call client_sync() one or more times in order to complete a
** sync operation.  Usually, client_sync() is called only once, though
** is can be called multiple times if the SYNC_ALLURL flags is set.
*/
static int client_sync_all_urls(
  unsigned syncFlags,      /* Mask of SYNC_* flags */
  unsigned configRcvMask,  /* Receive these configuration items */
  unsigned configSendMask, /* Send these configuration items */
  const char *zAltPCode    /* Alternative project code (usually NULL) */
){
  int nErr;
  int nOther;
  char **azOther;
  int i;
  Stmt q;

  sync_explain(syncFlags);
  nErr = client_sync(syncFlags, configRcvMask, configSendMask, zAltPCode);
  if( (syncFlags & SYNC_ALLURL)==0 ) return nErr;
  nOther = 0;
  azOther = 0;
  db_prepare(&q,
    "SELECT substr(name,10) FROM config"
    " WHERE name glob 'sync-url:*'"
    "   AND value<>(SELECT value FROM config WHERE name='last-sync-url')"
  );
  while( db_step(&q)==SQLITE_ROW ){
    const char *zUrl = db_column_text(&q, 0);
    azOther = fossil_realloc(azOther, sizeof(*azOther)*(nOther+1));
    azOther[nOther++] = fossil_strdup(zUrl);
  }
  db_finalize(&q);
  for(i=0; i<nOther; i++){
    url_unparse(&g.url);
    url_parse(azOther[i], URL_PROMPT_PW);
    sync_explain(syncFlags);
    nErr += client_sync(syncFlags, configRcvMask, configSendMask, zAltPCode);
    fossil_free(azOther[i]);
    azOther[i] = 0;
  }
  fossil_free(azOther);
  return nErr;
}


/*
** If the repository is configured for autosyncing, then do an
** autosync.  Bits of the "flags" parameter determine details of behavior:
**
**   SYNC_PULL           Pull content from the server to the local repo
**   SYNC_PUSH           Push content from local up to the server

  }
  if( find_option("verbose","v",0)!=0 ){
    *pSyncFlags |= SYNC_VERBOSE;
  }
  if( find_option("no-http-compression",0,0)!=0 ){
    *pSyncFlags |= SYNC_NOHTTPCOMPRESS;
  }
  if( find_option("all",0,0)!=0 ){
    *pSyncFlags |= SYNC_ALLURL;
  }
  url_proxy_options();
  clone_ssh_find_options();
  if( !uvOnly ) db_find_and_open_repository(0, 0);
  db_open_config(0, 1);
  if( g.argc==2 ){
    if( db_get_boolean("auto-shun",0) ) configSync = CONFIGSET_SHUN;
  }else if( g.argc==3 ){
    zUrl = g.argv[2];
    if( (*pSyncFlags) & SYNC_ALLURL ){
      fossil_fatal("cannot use both the --all option and specific URL \"%s\"",
          zUrl);
    }
  }
  if( ((*pSyncFlags) & (SYNC_PUSH|SYNC_PULL))==(SYNC_PUSH|SYNC_PULL)
   && db_get_boolean("uv-sync",0)
  ){
    *pSyncFlags |= SYNC_UNVERSIONED;
  }
  urlFlags &= ~urlOmitFlags;
  if( urlFlags & URL_REMEMBER ){
    clone_ssh_db_set_options();
  }
  url_parse(zUrl, urlFlags);
  remember_or_get_http_auth(zHttpAuth, urlFlags & URL_REMEMBER, zUrl);
  url_remember();
  if( g.url.protocol==0 ){
    if( urlOptional ) fossil_exit(0);
    usage("URL");
  }
  user_select();









  url_enable_proxy("via proxy: ");
  *pConfigFlags |= configSync;
}


/*
** COMMAND: pull
**
** Usage: %fossil pull ?URL? ?options?
**
** Pull all sharable changes from a remote repository into the local
** repository.  Sharable changes include public check-ins, edits to
** wiki pages, tickets, tech-notes, and forum posts.  Add
** the --private option to pull private branches.  Use the
** "configuration pull" command to pull website configuration details.
**
** If URL is not specified, then the URL from the most recent clone, push,
** pull, remote, or sync command is used.  See "fossil help clone" for
** details on the URL formats.
**
** Options:
**
**   --all                      Pull from all remotes, not just the default
**   -B|--httpauth USER:PASS    Credentials for the simple HTTP auth protocol,
**                              if required by the remote website
**   --from-parent-project      Pull content from the parent project
**   --ipv4                     Use only IPv4, not IPv6
**   --no-http-compression      Do not compress HTTP traffic
**   --once                     Do not remember URL for subsequent syncs
**   --private                  Pull private branches too

  }
  if( zAltPCode ) urlOmitFlags = URL_REMEMBER;
  process_sync_args(&configFlags, &syncFlags, 0, urlOmitFlags);

  /* We should be done with options.. */
  verify_all_options();

  client_sync_all_urls(syncFlags, configFlags, 0, zAltPCode);
}

/*
** COMMAND: push
**
** Usage: %fossil push ?URL? ?options?
**
** Push all sharable changes from the local repository to a remote
** repository.  Sharable changes include public check-ins, edits to
** wiki pages, tickets, tech-notes, and forum posts.  Use
** --private to also push private branches.  Use the "configuration
** push" command to push website configuration details.
**
** If URL is not specified, then the URL from the most recent clone, push,
** pull, remote, or sync command is used.  See "fossil help clone" for
** details on the URL formats.
**
** Options:
**
**   --all                      Push to all remotes, not just the default
**   -B|--httpauth USER:PASS    Credentials for the simple HTTP auth protocol,
**                              if required by the remote website
**   --ipv4                     Use only IPv4, not IPv6
**   --no-http-compression      Do not compress HTTP traffic
**   --once                     Do not remember URL for subsequent syncs
**   --proxy PROXY              Use the specified HTTP proxy
**   --private                  Push private branches too

  /* We should be done with options.. */
  verify_all_options();

  if( db_get_boolean("dont-push",0) ){
    fossil_fatal("pushing is prohibited: the 'dont-push' option is set");
  }
  client_sync_all_urls(syncFlags, 0, 0, 0);
}


/*
** COMMAND: sync
**
** Usage: %fossil sync ?URL? ?options?
**
** Synchronize all sharable changes between the local repository and a
** remote repository.  Sharable changes include public check-ins and
** edits to wiki pages, tickets, forum posts, and technical notes.
**
** If URL is not specified, then the URL from the most recent clone, push,
** pull, remote, or sync command is used.  See "fossil help clone" for
** details on the URL formats.
**
** Options:
**
**   --all                      Sync with all remotes, not just the default
**   -B|--httpauth USER:PASS    Credentials for the simple HTTP auth protocol,
**                              if required by the remote website
**   --ipv4                     Use only IPv4, not IPv6
**   --no-http-compression      Do not compress HTTP traffic
**   --once                     Do not remember URL for subsequent syncs
**   --proxy PROXY              Use the specified HTTP proxy
**   --private                  Sync private branches too

  }
  process_sync_args(&configFlags, &syncFlags, 0, 0);

  /* We should be done with options.. */
  verify_all_options();

  if( db_get_boolean("dont-push",0) ) syncFlags &= ~SYNC_PUSH;

  if( (syncFlags & SYNC_PUSH)==0 ){
    fossil_warning("pull only: the 'dont-push' option is set");
  }
  client_sync_all_urls(syncFlags, configFlags, 0, 0);
}

/*
** Handle the "fossil unversioned sync" and "fossil unversioned revert"
** commands.
*/
void sync_unversioned(unsigned syncFlags){

#define SYNC_UNVERSIONED    0x0100    /* Sync unversioned content */
#define SYNC_UV_REVERT      0x0200    /* Copy server unversioned to client */
#define SYNC_UV_TRACE       0x0400    /* Describe UV activities */
#define SYNC_UV_DRYRUN      0x0800    /* Do not actually exchange files */
#define SYNC_IFABLE         0x1000    /* Inability to sync is not fatal */
#define SYNC_CKIN_LOCK      0x2000    /* Lock the current check-in */
#define SYNC_NOHTTPCOMPRESS 0x4000    /* Do not compression HTTP messages */
#define SYNC_ALLURL         0x8000    /* The --all flag - sync to all URLs */
#endif

/*
** Floating-point absolute value
*/
static double fossil_fabs(double x){
  return x>0.0 ? x : -x;