Fossil

/*
** Try to find the repository and open it.  Use the -R or --repository
** option to locate the repository.  If no such option is available, then
** use the repository of the open checkout if there is one.
**
** Error out if the repository cannot be opened.
*/
void db_find_and_open_repository(int bFlags, int nArgUsed){
  const char *zRep = find_option("repository", "R", 1);
  if( zRep==0 && nArgUsed && g.argc==nArgUsed+1 ){
    zRep = g.argv[nArgUsed];
  }
  if( zRep==0 ){
    if( db_open_local()==0 ){
      goto rep_not_found;
    }
    zRep = db_lget("repository", 0);
    if( zRep==0 ){

  db_reset(&q);
}


/*
** COMMAND: export
**
** Usage: %fossil export --git ?REPOSITORY?
**
** Write an export of all check-ins to standard output.  The export is
** written in the git-fast-export file format assuming the --git option is
** provided.  The git-fast-export format is currently the only VCS 
** interchange format supported, though other formats may be added in
** the future.
**
** Run this command within a checkout.  Or use the -R or --repository
** option to specify a Fossil repository to be exported.
**
** Only check-ins are exported using --git.  Git does not support tickets 
** or wiki or events or attachments, so none of those are exported.
*/
void export_cmd(void){
  Stmt q;
  int i;
  Bag blobs, vers;
  bag_init(&blobs);
  bag_init(&vers);

  find_option("git", 0, 0);   /* Ignore the --git option for now */
  db_find_and_open_repository(0, 2);
  verify_all_options();
  if( g.argc!=2 && g.argc!=3 ){ usage("--git ?REPOSITORY?"); }

  /* Step 1:  Generate "blob" records for every artifact that is part
  ** of a check-in 
  */
  fossil_binary_mode(stdout);
  db_prepare(&q, "SELECT DISTINCT fid FROM mlink WHERE fid>0");
  while( db_step(&q)==SQLITE_ROW ){

  fossil_fatal("bad fast-import line: [%s]", zLine);
  return;
}

/*
** COMMAND: import
**
** Usage: %fossil import --git NEW-REPOSITORY
**
** Read text generated by the git-fast-export command and use it to
** construct a new Fossil repository named by the NEW-REPOSITORY
** argument.  The get-fast-export text is read from standard input.
**
** The git-fast-export file format is currently the only VCS interchange
** format that is understood, though other interchange formats may be added
** in the future.
*/
void git_import_cmd(void){
  char *zPassword;
  FILE *pIn;
  int forceFlag = find_option("force", "f", 0)!=0;
  find_option("git",0,0);  /* Skip the --git option for now */
  verify_all_options();
  if( g.argc!=3  && g.argc!=4 ){
    usage("REPOSITORY-NAME");
  }
  if( g.argc==4 ){
    pIn = fopen(g.argv[3], "rb");
  }else{
    pIn = stdin;

**
** Change the project-code and make other changes in order to prevent
** the repository from ever again pushing or pulling to other
** repositories.  Used to create a "test" repository for development
** testing by cloning a working project repository.
*/
void test_detach_cmd(void){
  db_find_and_open_repository(0, 2);
  db_begin_transaction();
  db_multi_exec(
    "DELETE FROM config WHERE name='last-sync-url';"
    "UPDATE config SET value=lower(hex(randomblob(20)))"
    " WHERE name='project-code';"
    "UPDATE config SET value='detached-' || value"
    " WHERE name='project-name' AND value NOT GLOB 'detached-*';"

<h2>Git &rarr; Fossil</h2>

To import a Git repository into Fossil, run commands like this:

<blockquote><pre>
cd git-repo
git fast-export --all | fossil import --git new-repo.fossil
</pre></blockquote>

In other words, simply pipe the output of the "git fast-export" command
into the "fossil import --git" command.  The 3rd argument to the "fossil import"
command is the name of a new Fossil repository that is created to hold the Git
content.

The --git option is not actually required.  The git-fast-export file format
is currently the only VCS interchange format that Fossil understands.  But
future versions of Fossil might be enhanced to understand other VCS 
interchange formats, and so for compatibility, use of the
--git option is recommended.

<h2>Fossil &rarr; Git</h2>

To convert a Fossil repository into a Git repository, run commands like
this:

<blockquote><pre>
git init new-repo
cd new-repo
fossil export --git ../repo.fossil | git fast-import
</pre></blockquote>

In other words, create a new Git repository, then pipe the output from the
"fossil export --git" command into the "git fast-import" command.

Note that the "fossil export --git" command only exports the versioned files.
Tickets and wiki and events are not exported, since Git does not understand
those concepts.

As with the "import" command, the --git option is not required
since the git-fast-export file format is currently the only VCS interchange 
format that Fossil will generate.  However,
future versions of Fossil might add the ability to generate other
VCS interchange formats, and so for compatibility, the use of the --git 
option recommented.