vim: Initial ftplugin and indent support

Vim's indent support makes it easier to automatically indent puppet
manifests.

3 files changed, 172 insertions, 1 deletions

diff --git a/ext/vim/README b/ext/vim/README
index 776bb1eb2..7fd2934fb 100644
--- a/ext/vim/README
+++ b/ext/vim/README
@@ -1,2 +1,3 @@
 To install these files, copy them into ~/.vim, or the relevant
-system-wide location.
+system-wide location.  To use the ftplugin and indenting, you may need
+to enable them with "filetype plugin indent on" in your vimrc.
diff --git a/ext/vim/ftplugin/puppet.vim b/ext/vim/ftplugin/puppet.vim
new file mode 100644
index 000000000..b6491554b
--- /dev/null
+++ b/ext/vim/ftplugin/puppet.vim
@@ -0,0 +1,94 @@
+" Vim filetype plugin
+" Language:     Puppet
+" Maintainer:   Todd Zullinger <tmz@pobox.com>
+" Last Change:  2009 Aug 19
+" vim: set sw=4 sts=4:
+
+if exists("b:did_ftplugin")
+    finish
+endif
+let b:did_ftplugin = 1
+
+if !exists("no_plugin_maps") && !exists("no_puppet_maps")
+    if !hasmapto("<Plug>AlignRange")
+        map <buffer> <LocalLeader>= <Plug>AlignRange
+    endif
+endif
+
+noremap <buffer> <unique> <script> <Plug>AlignArrows :call <SID>AlignArrows()<CR>
+noremap <buffer> <unique> <script> <Plug>AlignRange :call <SID>AlignRange()<CR>
+
+iabbrev => =><C-R>=<SID>AlignArrows('=>')<CR>
+iabbrev +> +><C-R>=<SID>AlignArrows('+>')<CR>
+
+if exists('*s:AlignArrows')
+    finish
+endif
+
+let s:arrow_re = '[=+]>'
+let s:selector_re = '[=+]>\s*\$.*\s*?\s*{\s*$'
+
+function! s:AlignArrows(op)
+    let cursor_pos = getpos('.')
+    let lnum = line('.')
+    let line = getline(lnum)
+    if line !~ s:arrow_re
+        return
+    endif
+    let pos = stridx(line, a:op)
+    let start = lnum
+    let end = lnum
+    let pnum = lnum - 1
+    while 1
+        let pline = getline(pnum)
+        if pline !~ s:arrow_re || pline =~ s:selector_re
+            break
+        endif
+        let start = pnum
+        let pnum -= 1
+    endwhile
+    let cnum = end
+    while 1
+        let cline = getline(cnum)
+        if cline !~ s:arrow_re ||
+                \ (indent(cnum) != indent(cnum+1) && getline(cnum+1) !~ '\s*}')
+            break
+        endif
+        let end = cnum
+        let cnum += 1
+    endwhile
+    call s:AlignSection(start, end)
+    let cursor_pos[2] = stridx(getline('.'), a:op) + strlen(a:op) + 1
+    call setpos('.', cursor_pos)
+    return ''
+endfunction
+
+function! s:AlignRange() range
+    call s:AlignSection(a:firstline, a:lastline)
+endfunction
+
+" AlignSection and AlignLine are from the vim wiki:
+" http://vim.wikia.com/wiki/Regex-based_text_alignment
+function! s:AlignSection(start, end)
+    let extra = 1
+    let sep = s:arrow_re
+    let maxpos = 0
+    let section = getline(a:start, a:end)
+    for line in section
+        let pos = match(line, ' *'.sep)
+        if maxpos < pos
+            let maxpos = pos
+        endif
+    endfor
+    call map(section, 's:AlignLine(v:val, sep, maxpos, extra)')
+    call setline(a:start, section)
+endfunction
+
+function! s:AlignLine(line, sep, maxpos, extra)
+    let m = matchlist(a:line, '\(.\{-}\) \{-}\('.a:sep.'.*\)')
+    if empty(m)
+        return a:line
+    endif
+    let spaces = repeat(' ', a:maxpos - strlen(m[1]) + a:extra)
+    return m[1] . spaces . m[2]
+endfunction
diff --git a/ext/vim/indent/puppet.vim b/ext/vim/indent/puppet.vim
new file mode 100644
index 000000000..689e06879
--- /dev/null
+++ b/ext/vim/indent/puppet.vim
@@ -0,0 +1,76 @@
+" Vim indent file
+" Language:	Puppet
+" Maintainer:	Todd Zullinger <tmz@pobox.com>
+" Last Change:	2009 Aug 19
+" vim: set sw=4 sts=4:
+
+if exists("b:did_indent")
+    finish
+endif
+let b:did_indent = 1
+
+setlocal autoindent smartindent
+setlocal indentexpr=GetPuppetIndent()
+setlocal indentkeys+=0],0)
+
+if exists("*GetPuppetIndent")
+    finish
+endif
+
+" Check if a line is part of an include 'block', e.g.:
+"   include foo,
+"       bar,
+"       baz
+function! s:PartOfInclude(lnum)
+    let lnum = a:lnum
+    while lnum
+        let lnum = lnum - 1
+        let line = getline(lnum)
+        if line !~ ',$'
+            break
+        endif
+        if line =~ '^\s*include\s\+[^,]\+,$'
+            return 1
+        endif
+    endwhile
+    return 0
+endfunction
+
+function! s:OpenBrace(lnum)
+    call cursor(a:lnum, 1)
+    return searchpair('{\|\[\|(', '', '}\|\]\|)', 'nbW')
+endfunction
+
+function! GetPuppetIndent()
+    let pnum = prevnonblank(v:lnum - 1)
+    if pnum == 0
+       return 0
+    endif
+
+    let line = getline(v:lnum)
+    let pline = getline(pnum)
+    let ind = indent(pnum)
+
+    if pline =~ '^\s*#'
+        return ind
+    endif
+
+    if pline =~ '\({\|\[\|(\|:\)$'
+        let ind += &sw
+    elseif pline =~ ';$' && pline !~ '[^:]\+:.*[=+]>.*'
+        let ind -= &sw
+    elseif pline =~ '^\s*include\s\+.*,$'
+        let ind += &sw
+    endif
+
+    if pline !~ ',$' && s:PartOfInclude(pnum)
+        let ind -= &sw
+    endif
+
+    " Match } }, }; ] ]: )
+    if line =~ '^\s*\(}\(,\|;\)\?$\|]:\?$\|)\)'
+        let ind = indent(s:OpenBrace(v:lnum))
+    endif
+
+    return ind
+endfunction