proc get_script_or_fail {} {
  set fileName [file normalize [info script]]
  if {[string length $fileName] == 0 || ![file exists $fileName]} {
    error "Failed to obtain the file name of the test being run."
  }
  return $fileName
}

proc robust_delete { path {force ""} } {
  set error "unknown error"
  for {set try 0} {$try < 10} {incr try} {
    if {$force eq "YES_DO_IT"} {
      if {[catch {file delete -force $path} error] == 0} {
        return
      }
    } else {
      if {[catch {file delete $path} error] == 0} {
        return
      }
    }
    after [expr {$try * 100}]
  }
  error "cannot delete \"$path\": $error"
}

proc test_cleanup {} {
  if {![info exists ::tempRepoPath]} {return}
  if {![file exists $::tempRepoPath]} {return}
  if {![file isdirectory $::tempRepoPath]} {return}
  set tempPathEnd [expr {[string length $::tempPath] - 1}]
  if {[string length $::tempPath] == 0 || \
      [string range $::tempRepoPath 0 $tempPathEnd] ne $::tempPath} {
    error "Temporary repository path has wrong parent during cleanup."
  }
  if {[info exists ::tempSavedPwd]} {cd $::tempSavedPwd; unset ::tempSavedPwd}


  # First, attempt to delete the specific temporary repository directories
  # for this test file.
  set scriptName [file tail [get_script_or_fail]]
  foreach repoSeed $::tempRepoSeeds {
    set repoPath [file join $::tempRepoPath $repoSeed $scriptName]
    robust_delete $repoPath YES_DO_IT; # FORCE, arbitrary children.
    set seedPath [file join $::tempRepoPath $repoSeed]
    robust_delete $seedPath; # NO FORCE.
  }
  # Next, attempt to gracefully delete the temporary repository directory
  # for this process.
  robust_delete $::tempRepoPath
  # Finally, attempt to gracefully delete the temporary home directory.
  if {$::tcl_platform(platform) eq "windows"} {
    robust_delete [file join $::tempHomePath _fossil]
  } else {
    robust_delete [file join $::tempHomePath .fossil]
  }
  robust_delete $::tempHomePath
}

proc is_home_elsewhere {} {
  return [expr {[info exists ::env(FOSSIL_HOME)] && \
      $::env(FOSSIL_HOME) eq $::tempHomePath}]
}

}

#
# Create and open a new Fossil repository and clean the checkout
#
proc repo_init {{filename ".rep.fossil"}} {
  set_home_to_elsewhere

  set ::tempRepoPath [file join $::tempPath repo_[pid]]
  set repoSeed [appendArgs [string trim [clock seconds] -] _ [getSeqNo]]
  lappend ::tempRepoSeeds $repoSeed
  set repoPath [file join \
      $::tempRepoPath $repoSeed [file tail [get_script_or_fail]]]
  if {[catch {
    file mkdir $repoPath
  } error] != 0} {
    error "could not make directory \"$repoPath\",\
please set TEMP variable in environment: $error"
  }
  if {![info exists ::tempSavedPwd]} {set ::tempSavedPwd [pwd]}; cd $repoPath
  exec $::fossilexe new $filename
  exec $::fossilexe open $filename
  exec $::fossilexe set mtime-changes off
}

# This procedure only returns non-zero if the Tcl integration feature was
# enabled at compile-time and is now enabled at runtime.