#!/bin/sh
# the next line restarts using tclsh \
exec tclsh "$0" -- ${1+"$@"}


proc cleanup_old {root} {
  if {[ file isdirectory $root ]} {
    puts "Deleting $root"
    file delete -force $root
  }
  set oldirs [glob -nocomplain -- svnnc*]
  foreach od $oldirs {
    puts "Deleting $od"
    file delete -force $od
  }
  puts "==============================="
}

proc repository {Root topdir} {
  global taghead

  puts "==============================="
  puts "MAKING REPOSITORY $Root"

  # Create the repository
  file mkdir $Root
  set exec_cmd "svnadmin create $Root"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  if {$ret} {
    puts $out
    puts "COULD NOT CREATE REPOSITORY $Root"
    exit 1
  }
  puts "CREATED $Root"

  file mkdir [file join $topdir $taghead(trunk)]
  file mkdir [file join $topdir $taghead(branch)]
  file mkdir [file join $topdir $taghead(tag)]
  puts "==============================="
  puts "IMPORTING FILETREE"
  set exec_cmd "svn import $topdir file:///$Root -m \"Imported\""
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  puts "IMPORT FINISHED"
}

proc checkout_branch {Root tag} {
  global taghead

  puts "==============================="
  puts "CHECKING OUT $tag"
  # Check out 
  if {$tag eq $taghead(trunk)} {
    set exec_cmd "svn co file:///$Root/$taghead(trunk) svnnc_$tag"
  } else {
    set exec_cmd "svn co file:///$Root/$taghead(branch)/$tag svnnc_$tag"
  }
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  puts "CHECKOUT FINISHED"
}

proc newbranch {Root oldtag newtag} {
  global taghead

  if {$oldtag eq $taghead(trunk)} {
    set exec_cmd "svn copy file:///$Root/$oldtag file:///$Root/$taghead(branch)/$newtag -m \"Dogs $newtag\""
  } else {
    set exec_cmd "svn copy file:///$Root/$taghead(branch)/$oldtag file:///$Root/$taghead(branch)/$newtag -m \"Dogs $newtag\""
  }
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  puts "CHECKING OUT BRANCH"
  set exec_cmd "svn co file:///$Root/$taghead(branch)/$newtag svnnc_$newtag"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
}

proc tag {Root tag} {
  global taghead

  # Need to update . or the tag may be in the wrong place
  set exec_cmd "svn update \".\""
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out

  puts "Tag: $tag"
  set exec_cmd "svn copy \".\" file:///$Root/$taghead(tag)/$tag -m \"Tag $tag\""
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
}

proc merge {fromtag totag} {
  global taghead
  global WD

  cd svnnc_$totag
  set exec_cmd "svn update"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  # This puts mergeinfo only into .
  # --- Recording mergeinfo for merge between repository URLs into '.'
  set exec_cmd "svn merge --reintegrate ^/$taghead(branch)/$fromtag"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  commit "Merge branch A to trunk"
  cd $WD
}

proc writefile {filename string} {
  puts " append \"$string\" to $filename"
  set fp [open "$filename" a]
  puts $fp $string
  close $fp
}

proc addfile {filename branch} {
  puts "Add $filename on $branch"
  set exec_cmd "svn add $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
}

proc delfile {filename branch} {
  puts "Delete $filename on $branch"
  file delete $filename
  set exec_cmd "svn delete $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
}

proc commit {comment} {
  set exec_cmd "svn commit -m \"$comment\""
  # This is so the timestamp is different from the last commit
  after 1000
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
}

proc mkfiles {topdir} {
  global WD
  global taghead

  puts "MAKING FILETREE"
  # Make some files to put in the repository
  set trunkhead [file join $topdir $taghead(trunk)]
  file mkdir $trunkhead

  cd $trunkhead

  # Make some text files
  foreach n {1 2 3} {
    writefile "File$n.txt" "Initial"
  }
  writefile "FTags.txt" "Initial"
  foreach D {Dir1 "Dir 2"} {
    puts $D
    file mkdir $D
    foreach n {1 2 " 3"} {
      set subf [file join $D "F$n.txt"]
      writefile $subf "Initial"
    }
  }
  cd $WD
}

proc modfiles {string} {
  global tcl_platform

  set tmpfile "list.tmp"
  file delete -force $tmpfile
  if {$tcl_platform(platform) eq "windows"} {
    puts "Must be a PC"
    set ret [catch {eval "exec [auto_execok dir] /b F*.txt /s > $tmpfile"} out]
  } else {
    set ret [catch {eval "exec find . -name F*.txt -o -name .svn -prune -a -type f > $tmpfile"} out]
  }
  if {$ret} {
    puts "Find failed"
    puts $out
    exit 1
  }
  set fl [open $tmpfile r]
  while { [gets $fl item] >= 0} {
    writefile $item "$string"
  }
  close $fl
  file delete -force $tmpfile
}

proc getrev {filename} {
  # Find out current revision

  set exec_cmd "svn log -q $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  foreach logline [split $out "\n"] {
    if {[string match "r*" $logline]} {
      set latest [lindex $logline 0]
      break
    }
  }
  return $latest
}

proc conflict {filename} {
  # Create a conflict

  set latest [getrev $filename]
  # Save a copy
  file copy $filename Ftmp.txt
  # Make a change
  writefile $filename "Conflict A"
  set exec_cmd "svn commit -m \"change1\" $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  # Check out latest revision
  set exec_cmd "svn update -r $latest $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  # Make a different change (we hope)
  file delete -force -- $filename
  file rename Ftmp.txt $filename
  writefile $filename "Conflict B"
  # Check out head, which now conflicts with our change
  set exec_cmd "svn update --non-interactive -r HEAD $filename"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
}

##############################################
set branching_desired 1
set leave_a_mess 1

for {set i 1} {$i < [llength $argv]} {incr i} {
  set arg [lindex $argv $i]

  switch -regexp $arg {
    {^--*nobranch} {
      set branching_desired 0
    }
    {^--*nomess} {
      set leave_a_mess 0
    }
  }
}

if [file isdirectory .svn] {
  puts "Please don't do that here.  There's already a .svn directory."
  exit 1
}

set WD [pwd]
set SVNROOT [file join $WD "SVN_NONCONFORM"]
set taghead(trunk) "elephants"
set taghead(branch) "dogs"
set taghead(tag) "ducklings"

cleanup_old $SVNROOT

mkfiles "svnnc"
repository $SVNROOT "svnnc"
checkout_branch "$SVNROOT" "$taghead(trunk)"

puts "==============================="
puts "First revision on $taghead(trunk)"
cd svnnc_$taghead(trunk)
set exec_cmd "svn propset -R svn:ignore .DS_Store ."
puts "$exec_cmd"
set ret [catch {eval "exec $exec_cmd"} out]
if {$ret} {
  puts $out
}

modfiles "Main 1"
writefile Ftrunk.txt "Main 1"
addfile Ftrunk.txt $taghead(trunk)
commit "First revision on $taghead(trunk)"
tag $SVNROOT "ducklingA"
tag $SVNROOT "ducklingC"
cd $WD

if {$branching_desired} {
  puts "==============================="
  puts "MAKING BRANCH A"
  newbranch $SVNROOT $taghead(trunk) dogsA
  cd $WD/svnnc_dogsA
  writefile FdogsA.txt "DogsA 1"
  addfile FdogsA.txt dogsA
  commit "Add file FdogsA.txt on branch A"
  cd $WD

  puts "==============================="
  puts "First revision on Branch A"
  cd $WD/svnnc_dogsA
  modfiles "DogsA 1"
  commit "First revision on branch A"
  cd $WD

  puts "==============================="
  puts "Second revision on Branch A"
  cd $WD/svnnc_dogsA
  modfiles "DogsA 2"
  commit "Second revision on branch A"
  tag $SVNROOT "ducklingAA"
  cd $WD

  # Branch C
  puts "==============================="
  puts "MAKING BRANCH C FROM SAME ROOT"
  newbranch $SVNROOT $taghead(trunk) dogsC
  cd $WD/svnnc_dogsC
  modfiles "DogsC 1"
  writefile FdogsC.txt "DogsC 1"
  addfile FdogsC.txt dogsC
  commit "Add file FC on Branch C"
  cd $WD

  puts "==============================="
  puts "Merging Branch A to trunk"
  merge dogsA $taghead(trunk)
  cd $WD
}

# Make more modifications on trunk
puts "==============================="
puts "Second revision on $taghead(trunk)"
cd $WD/svnnc_$taghead(trunk)
modfiles "Main 2"
commit "Second revision on $taghead(trunk)"
foreach t {one ten one_hundred one_thousand ten_thousand one_hundred_thousand} {
  set exec_cmd "svn copy --parents -m\"multitags\" FTags.txt file://$SVNROOT/$taghead(tag)/$t/FTags.txt"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  if {$ret} {
    exit 1
  }
}
cd $WD

puts "==============================="
puts "Third revision on $taghead(trunk)"
cd $WD/svnnc_$taghead(trunk)
modfiles "Main 3"
commit "Third revision on $taghead(trunk)"
tag $SVNROOT "ducklingB"
cd $WD

if {$branching_desired} {
  # Branch off of the branch
  puts "==============================="
  puts "MAKING BRANCH AA"
  newbranch $SVNROOT dogsA dogsAA
  cd $WD/svnnc_dogsAA
  modfiles "DogsAA 1"
  writefile FdogsAA.txt "DogsAA 1"
  addfile FdogsAA.txt dogsAA
  delfile Ftrunk.txt dogsAA
  commit "Changes on Dogs AA"
  cd $WD

  # Make another revision on branchA after
  # branchAA has branched off
  puts "==============================="
  puts "Third revision on Branch A"
  cd $WD/svnnc_dogsA
  modfiles "DogsA 3"
  commit "Third revision on Dogs A"
  cd $WD

  # Branch B
  puts "==============================="
  puts "MAKING BRANCH B"
  newbranch $SVNROOT $taghead(trunk) dogsB
  cd $WD/svnnc_dogsB
  # Empty branch. Don't check out or update.
  set exec_cmd "svn mkdir -m\"empty_branch\" file://$SVNROOT/$taghead(branch)/branchD"
  puts "$exec_cmd"
  set ret [catch {eval "exec $exec_cmd"} out]
  puts $out
  if {$ret} {
    exit 1
  }
  modfiles "DogsB 1"
  writefile FdogsB.txt "DogsB 1"
  addfile FdogsB.txt dogsB
  commit "Add file FB on Dogs B"
  cd $WD
}

if {$leave_a_mess} {
  # Leave the trunk with uncommitted changes
  puts "==============================="
  puts "Making Uncommitted changes on trunk"
  cd $WD/svnnc_$taghead(trunk)
  # Local only
  writefile FileLocal.txt "Pending"
  # Newly added
  writefile FileAdd.txt "Pending"
  addfile FileAdd.txt trunk
  # Missing
  file delete -- File3.txt trunk
  # Modify
  writefile File2.txt "Pending"
  writefile "Dir1/F 3.txt" "Pending"
  writefile "Dir1/F2.txt" "Pending"
  writefile "Dir 2/F1.txt" "Pending"
  # Conflict
  conflict Ftrunk.txt
  cd $WD
}

# Remove the source
file delete -force -- svnnc