/* Return 1 on success and (assuming fatal is not set) 0 if not found. */
  return result;
}

/*
** COMMAND: revert
**
** Usage: %fossil revert ?OPTIONS? ?FILE ...?
**
** Revert to the current repository version of FILE, or to
** the baseline VERSION specified with -r flag.

**
** If FILE was part of a rename operation, both the original file
** and the renamed file are reverted.
**
** Using a directory name for any of the FILE arguments is the same
** as using every subdirectory and file beneath that directory.
**
** Revert all files if no file name is provided.
**
** If a file is reverted accidentally, it can be restored using
** the "fossil undo" command.
**
** Options:
**   -r|--revision VERSION    Revert given FILE(s) back to given
**                            VERSION
**
** See also: redo, undo, checkout, update
*/
void revert_cmd(void){
  Manifest *pCoManifest;          /* Manifest of current checkout */
  Manifest *pRvManifest;          /* Manifest of selected revert version */
  ManifestFile *pCoFile;          /* File within current checkout manifest */
  ManifestFile *pRvFile;          /* File within revert version manifest */
  const char *zFile;              /* Filename relative to checkout root */
  const char *zRevision;          /* Selected revert version, NULL if current */
  Blob record = BLOB_INITIALIZER; /* Contents of each reverted file */
  int i;
  Stmt q;
  int revertAll = 0;
  int revisionOptNotSupported = 0;

  undo_capture_command_line();
  zRevision = find_option("revision", "r", 1);
  verify_all_options();

  if( g.argc<2 ){
    usage("?OPTIONS? [FILE] ...");
  }
  if( zRevision && g.argc<3 ){
    fossil_fatal("directories or the entire tree can only be reverted"
                 " back to current version");
  }
  db_must_be_within_tree();

  /* Get manifests of revert version and (if different) current checkout. */
  pRvManifest = historical_manifest(zRevision);
  pCoManifest = zRevision ? historical_manifest(0) : 0;

  db_begin_transaction();
  undo_begin();
  db_multi_exec("CREATE TEMP TABLE torevert(name UNIQUE);");

  if( g.argc>2 ){
    for(i=2; i<g.argc; i++){
      Blob fname;
      zFile = mprintf("%/", g.argv[i]);
      blob_zero(&fname);
      file_tree_name(zFile, &fname, 0, 1);
      if( blob_eq(&fname, ".") ){
        if( zRevision ){
          revisionOptNotSupported = 1;
          break;
        }
        revertAll = 1;
        break;
      }else if( db_exists(
        "SELECT pathname"
        "  FROM vfile"
        " WHERE (substr(pathname,1,length('%q/'))='%q/'"
        "    OR  substr(origname,1,length('%q/'))='%q/');",
        blob_str(&fname), blob_str(&fname),
        blob_str(&fname), blob_str(&fname)) ){
        int vid;
        vid = db_lget_int("checkout", 0);
        vfile_check_signature(vid, 0);

        if( zRevision ){
          revisionOptNotSupported = 1;
          break;
        }
        db_multi_exec(
          "INSERT OR IGNORE INTO torevert"
          " SELECT pathname"
          "   FROM vfile"
          "  WHERE (substr(pathname,1,length('%q/'))='%q/'"
          "     OR  substr(origname,1,length('%q/'))='%q/')"
          "    AND (chnged OR deleted OR rid=0 OR pathname!=origname);",
          blob_str(&fname), blob_str(&fname),
          blob_str(&fname), blob_str(&fname)
        );
      }else{
        db_multi_exec(
          "REPLACE INTO torevert VALUES(%B);"
          "INSERT OR IGNORE INTO torevert"
          " SELECT pathname"
          "   FROM vfile"
          "  WHERE origname=%B;",
          &fname, &fname
        );
      }
      blob_reset(&fname);
    }
  }else{
    revertAll = 1;
  }

  if( revisionOptNotSupported ){
    fossil_fatal("directories or the entire tree can only be reverted"
                 " back to current version");
  }

  if ( revertAll ){
    int vid;
    vid = db_lget_int("checkout", 0);
    vfile_check_signature(vid, 0);
    db_multi_exec(
      "DELETE FROM vmerge;"
      "INSERT OR IGNORE INTO torevert "
      " SELECT pathname"
      "   FROM vfile "
      "  WHERE chnged OR deleted OR rid=0 OR pathname!=origname;"
    );
  }

  db_multi_exec(
    "INSERT OR IGNORE INTO torevert"
    " SELECT origname"
    "   FROM vfile"
    "  WHERE origname!=pathname AND pathname IN (SELECT name FROM torevert);"
  );
  blob_zero(&record);

fossil mv --soft f1 f1new
test 3-mv-1 {[file exists f1]}
test 3-mv-2 {![file exists f1new]}
revert-test 3-1 {} {
  REVERT f1
  DELETE f1new
} -exists {f1} -notexists {f1n}


# Test reverting of files under a sub-directory
test_setup
file mkdir d
write_file d/f1 "d/f1"
write_file d/f2 "d/f2"
write_file d/f3 "d/f3"
write_file d/f4 "d/f4"

fossil add d
fossil delete d/f1
fossil commit -m "d/f2 d/f3 d/f4"

## Changes to revert
fossil add d/f1
write_file d/f2 "4-1:d/f2"
fossil changes d/f2
fossil delete --soft d/f3

revert-test 4-1 {d/f1} {
  UNMANAGE   d/f1
} -changes {
  EDITED  d/f2
  DELETED d/f3
} -addremove {
  ADDED   d/f1
} -exists {d/f1 d/f2 d/f3}

revert-test 4-2 {d/f2} {
  REVERT  d/f2
} -changes {
  ADDED   d/f1
  DELETED d/f3
} -exists {d/f1 d/f2 d/f3}

revert-test 4-3 {d/f3} {
  REVERT   d/f3
} -changes {
  ADDED   d/f1
  EDITED  d/f2
} -exists {d/f1 d/f2 d/f3}

fossil mv --soft d/f4 d/f4new
test 4-4-mv-1 {[file exists d/f4]}
test 4-4-mv-2 {![file exists d/f4new]}
revert-test 4-4 {d/f4} {
  DELETE   d/f4new
  REVERT   d/f4
} -changes {
  ADDED   d/f1
  EDITED  d/f2
  DELETED d/f3
} -exists {d/f4} -notexists {d/f4new}

## Commit changes before testing reverting of directory rename,
## otherwise there're could be sequencing issues
fossil redo
fossil commit -m "4-5:setup"

fossil mv --soft d dnew
revert-test 4-5 {d/f1 d/f2 d/f3 d/f4} {
  REVERT   d/f1
  REVERT   d/f2
  UNMANAGE d/f3
  REVERT   d/f4
  DELETE   dnew/f1
  DELETE   dnew/f2
  DELETE   dnew/f4
} -addremove {
  ADDED    d/f3
} -exists {d/f1 d/f2 d/f3 d/f4} -notexists {dnew}


## Test reverting of changes in whole sub-directory tree
test_setup
file mkdir d
write_file f0 "f0"
write_file d/f1 "d/f1"
write_file d/f2 "d/f2"
write_file d/f3 "d/f3"
write_file d/f4 "d/f4"

fossil add f0 d
fossil delete d/f1
fossil commit -m "f0 d/f2 d/f3 d/f4"

## Changes to revert
fossil add d/f1
write_file d/f2 "5-1:d/f2"
fossil changes d/f2
fossil delete --soft d/f3

revert-test 5-1 {d} {
  UNMANAGE d/f1
  REVERT   d/f2
  REVERT   d/f3
} -addremove {
  ADDED    d/f1
} -exists {f0 d/f1 d/f2 d/f3}

write_file f0 "5-2:f0"
fossil changes f0
revert-test 5-2 {f0 d} {
  UNMANAGE d/f1
  REVERT   d/f2
  REVERT   d/f3
  REVERT   f0
} -addremove {
  ADDED    d/f1
} -exists {f0 d/f1 d/f2 d/f3}

## Commit changes before testing the revert of directory rename,
## otherwise there're could be sequencing issues
fossil commit -m "5-3:setup"

fossil changes

fossil mv --soft d dnew
revert-test 5-3 {d} {
  REVERT   d/f1
  REVERT   d/f2
  REVERT   d/f4
  DELETE   dnew/f1
  DELETE   dnew/f2
  DELETE   dnew/f4
} -addremove {
  ADDED    d/f3
} -exists {f0 d/f1 d/f2 d/f3 d/f4} -notexists {dnew}

## Reset/redo the undone results of revert to get to a clean checkout
fossil redo

file mkdir d/e
file mkdir d/e/f
write_file d/e/fe1 "d/e/fe1"
write_file d/e/f/ff1 "d/e/f/ff1"

file mkdir d1
file mkdir d1/e
write_file d1/e/fe1 "d1/e/fe1"
write_file d1/e/fe2 "d1/e/fe2"

fossil add d1/e/fe1
fossil commit d1/e/fe1 -m "d1/e/fe1"

write_file d1/e/fe1 "5-4:d1/e/fe1"
fossil changes d1/e/fe1
fossil add d d1

revert-test 5-4 {d d1} {
  UNMANAGE d/f3
  UNMANAGE d/e/fe1
  UNMANAGE d/e/f/ff1
  REVERT   d1/e/fe1
  UNMANAGE d1/e/fe2
} -addremove {
  ADDED    d/f3
  ADDED    d/e/fe1
  ADDED    d/e/f/ff1
  ADDED    d1/e/fe2
} -exists {d/f1 d/f2 d/f3 d/f4 d/e/fe1 d/e/fe1 d/e/f/ff1
           d1/e/fe1 d1/e/fe2}


###############################################################################

test_cleanup