1 files changed, 35 insertions, 0 deletions
diff --git a/indent/cabal.vim b/indent/cabal.vim
new file mode 100644
index 00000000..b2089a5e
--- /dev/null
+++ b/indent/cabal.vim
@@ -0,0 +1,35 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'haskell') == -1
+  
+" indentation for cabal
+"
+" author: raichoo (raichoo@googlemail.com)
+"
+if exists('b:did_indent')
+  finish
+endif
+
+let b:did_indent = 1
+
+if !exists('g:cabal_indent_section')
+  "executable name
+  ">>main-is:           Main.hs
+  ">>hs-source-dirs:    src
+  let g:cabal_indent_section = 2
+elseif exists('g:cabal_indent_section') && g:cabal_indent_section > 4
+  let g:cabal_indent_section = 4
+endif
+
+setlocal indentexpr=GetCabalIndent()
+setlocal indentkeys=!^F,o,O,<CR>
+
+function! GetCabalIndent()
+  let l:prevline = getline(v:lnum - 1)
+
+  if l:prevline =~ '\C^\(executable\|library\|flag\|source-repository\|test-suite\|benchmark\)'
+    return g:cabal_indent_section
+  else
+    return match(l:prevline, '\S')
+  endif
+endfunction
+
+endif