1 files changed, 70 insertions, 0 deletions
diff --git a/runtime/indent/hamster.vim b/runtime/indent/hamster.vim
new file mode 100644
index 0000000..ae5c3fd
--- /dev/null
+++ b/runtime/indent/hamster.vim
@@ -0,0 +1,70 @@
+" Vim indent file
+" Language:    Hamster Script 
+" Version:     2.0.6.1
+" Last Change: 2021 Oct 11
+" Maintainer:  David Fishburn <dfishburn dot vim at gmail dot com>
+" Download: https://www.vim.org/scripts/script.php?script_id=1099
+"
+"    2.0.6.1 (Oct 2021)
+"        Added b:undo_indent
+"        Added cpo check
+"
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+let b:did_indent = 1
+
+setlocal indentkeys+==~if,=~else,=~endif,=~endfor,=~endwhile
+setlocal indentkeys+==~do,=~until,=~while,=~repeat,=~for,=~loop
+setlocal indentkeys+==~sub,=~endsub
+
+let b:undo_indent = "setl indentkeys<"
+
+" Define the appropriate indent function but only once
+setlocal indentexpr=HamGetFreeIndent()
+if exists("*HamGetFreeIndent")
+  finish
+endif
+
+let s:keepcpo = &cpo
+set cpo&vim
+
+function HamGetIndent(lnum)
+  let ind = indent(a:lnum)
+  let prevline=getline(a:lnum)
+
+  " Add a shiftwidth to statements following if,  else, elseif,
+  " case, select, default, do, until, while, for, start
+  if prevline =~? '^\s*\<\(if\|else\%(if\)\?\|for\|repeat\|do\|while\|sub\)\>' 
+    let ind = ind + shiftwidth()
+  endif
+
+  " Subtract a shiftwidth from else, elseif, end(if|while|for), until
+  let line = getline(v:lnum)
+  if line =~? '^\s*\(else\|elseif\|loop\|until\|end\%(if\|while\|for\|sub\)\)\>'
+    let ind = ind - shiftwidth()
+  endif
+
+  return ind
+endfunction
+
+function HamGetFreeIndent()
+  " Find the previous non-blank line
+  let lnum = prevnonblank(v:lnum - 1)
+
+  " Use zero indent at the top of the file
+  if lnum == 0
+    return 0
+  endif
+
+  let ind=HamGetIndent(lnum)
+  return ind
+endfunction
+
+" Restore:
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
+" vim:sw=2 tw=80