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@ -1,7 +1,7 @@
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" Vim indent file
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" Language: Makefile
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" Maintainer: Nikolai Weibull <now@bitwi.se>
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" Latest Revision: 2006-04-26
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" Language: Makefile
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" Maintainer: Nikolai Weibull <now@bitwi.se>
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" Latest Revision: 2007-05-07
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if exists("b:did_indent")
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finish
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@ -9,159 +9,108 @@ endif
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let b:did_indent = 1
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setlocal indentexpr=GetMakeIndent()
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setlocal indentkeys=!^F,o,O
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setlocal indentkeys=!^F,o,O,<:>,=else,=endif
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setlocal nosmartindent
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if exists("*GetMakeIndent")
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finish
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endif
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let s:comment_rx = '^\s*#'
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let s:rule_rx = '^[^ \t#:][^#:]*:\{1,2}\%([^=:]\|$\)'
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let s:continued_rule_rx = '^[^#:]*:\{1,2}\%([^=:]\|$\)'
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let s:continuation_rx = '\\$'
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let s:assignment_rx = '^\s*\h\w*\s*+\==\s*\zs.*\\$'
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let s:assignment_rx = '^\s*\h\w*\s*[+?]\==\s*\zs.*\\$'
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let s:folded_assignment_rx = '^\s*\h\w*\s*[+?]\=='
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" TODO: This needs to be a lot more restrictive in what it matches.
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let s:just_inserted_rule_rx = '^\s*[^#:]\+:\{1,2}$'
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let s:conditional_directive_rx = '^ *\%(ifn\=\%(eq\|def\)\|else\)\>'
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let s:end_conditional_directive_rx = '^\s*\%(else\|endif\)\>'
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function s:remove_continuation(line)
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return substitute(a:line, s:continuation_rx, "", "")
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endfunction
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" TODO: Deal with comments, string, and all kinds of other crap, e.g., defines.
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" TODO: Unwrap the whole logic of this function into something that requires a
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" lot less 'return's.
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function GetMakeIndent()
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let lnum = v:lnum - 1
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if lnum == 0
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" TODO: Should this perhaps be v:lnum -1?
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" let prev_lnum = prevnonblank(v:lnum - 1)
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let prev_lnum = v:lnum - 1
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if prev_lnum == 0
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return 0
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endif
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let prev_line = getline(prev_lnum)
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" Figure out if the previous line is part of a rule or not. If it is, then
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" we more or less just indent by a 'tabstop', the previous' lines indent, or
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" remove all indent if the current line is itself a rule. Also, if the line
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" in question is part of a continuation-line set constituting the rule line
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" itself, we indent by either a 'shiftwidth', if the line is the first in the
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" continuation, or use the indent of the previous line, if not.
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while lnum > 0
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let line = getline(lnum)
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if line[0] != "\t"
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" We found a non-shell-command line, i.e., one that doesn't have a
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" leading tab.
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if line =~ s:rule_rx
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" The line looks like a rule line, so we must therefore either be inside a
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" rule or we are a continuation line to that rule line.
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if line =~ s:continuation_rx
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" Ah, the rule line was continued, so look up the last continuation
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" line that's above the current line.
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while line =~ s:continuation_rx && lnum < v:lnum
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let lnum += 1
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let line = getline(lnum)
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endwhile
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let lnum -= 1
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let line = getline(lnum)
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endif
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let prev_prev_lnum = prev_lnum - 1
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let prev_prev_line = prev_prev_lnum != 0 ? getline(prev_prev_lnum) : ""
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" If the line that we've found is right above the current line, deal
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" with it specifically.
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if lnum == v:lnum - 1
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" If it was continued, indent the current line by a shiftwidth, as it
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" is the first to follow it. Otherwise, depending on if the current
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" line is a rule line, i.e, a rule line following another rule line,
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" then indent to the left margin. Otherwise, the current line is the
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" first shell-command line in the rule, so indent by a 'tabstop'
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if line =~ s:continuation_rx
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return &sw
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else
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return getline(v:lnum) =~ s:rule_rx ? 0 : &ts
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endif
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else
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" If the previous line was a continuation line, then unless it was
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" itself a part of a continuation line, add a 'shiftwidth''s worth of
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" indent. Otherwise, just use the indent of the previous line.
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" Otherwise, if the previous line wasn't a continuation line, check
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" if the one above it was. If it was then indent to whatever level
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" the 'owning' line had. Otherwise, indent to the previous line's
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" level.
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let lnum = v:lnum - 1
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let line = getline(lnum)
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if line =~ s:continuation_rx
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let pnum = v:lnum - 2
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let pine = getline(pnum)
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if pine =~ s:continuation_rx
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return indent(lnum)
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else
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return indent(lnum) + &sw
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endif
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else
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let lnum = v:lnum - 2
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let line = getline(lnum)
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if line =~ s:continuation_rx
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while lnum > 0
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if line !~ s:continuation_rx
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let lnum += 1
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let line = getline(lnum)
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break
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endif
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let lnum -= 1
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let line = getline(lnum)
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endwhile
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" We've found the owning line. Indent to it's level.
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return indent(lnum)
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else
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return indent(v:lnum - 1)
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endif
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endif
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endif
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endif
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" The line wasn't a rule line, so the current line is part of a series
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" of tab-indented lines that don't belong to any rule.
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break
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endif
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let lnum -= 1
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endwhile
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" If the line before the one we are currently indenting ended with a
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" continuation, then try to figure out what 'owns' that line and indent
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" appropriately.
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let lnum = v:lnum - 1
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let line = getline(lnum)
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if line =~ s:continuation_rx
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let indent = indent(lnum)
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if line =~ s:assignment_rx
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" The previous line is a continuation line that begins a variable-
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" assignment expression, so set the indent to just beyond the whitespace
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" following the assignment operator ('=').
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call cursor(lnum, 1)
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" TODO: Deal with comments. In comments, continuations aren't interesting.
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if prev_line =~ s:continuation_rx
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if prev_prev_line =~ s:continuation_rx
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return indent(prev_lnum)
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elseif prev_line =~ s:rule_rx
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return &sw
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elseif prev_line =~ s:assignment_rx
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call cursor(prev_lnum, 1)
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if search(s:assignment_rx, 'W') != 0
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let indent = virtcol('.') - 1
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return virtcol('.') - 1
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else
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" TODO: ?
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return &sw
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endif
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else
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" TODO: OK, this might be a continued shell command, so perhaps indent
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" properly here? Leave this out for now, but in the next release this
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" should be using indent/sh.vim somehow.
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"if prev_line =~ '^\t' " s:rule_command_rx
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" if prev_line =~ '^\s\+[@-]\%(if\)\>'
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" return indent(prev_lnum) + 2
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" endif
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"endif
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return indent(prev_lnum) + &sw
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endif
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" The previous line didn't constitute an assignment, so just indent to
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" whatever level it had.
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return indent
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endif
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" If the line above the line above the current line ended was continued,
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" then the line above the current line was part of a continued line. Find
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" the 'owning' line and indent to its level.
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let lnum = v:lnum - 2
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let line = getline(lnum)
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if line =~ s:continuation_rx
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while lnum > 0
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if line !~ s:continuation_rx
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let lnum += 1
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let line = getline(lnum)
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break
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endif
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elseif prev_prev_line =~ s:continuation_rx
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let folded_line = s:remove_continuation(prev_prev_line) . ' ' . s:remove_continuation(prev_line)
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let lnum = prev_prev_lnum - 1
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let line = getline(lnum)
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while line =~ s:continuation_rx
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let folded_line = s:remove_continuation(line) . ' ' . folded_line
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let lnum -= 1
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let line = getline(lnum)
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endwhile
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" We've found the owning line. Indent to it's level.
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return indent(lnum)
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endif
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" If nothing else caught on, then check if this line is a rule line. If it
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" is, indent it to the left margin. Otherwise, simply use the indent of the
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" previous line.
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let line = getline(v:lnum)
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if line =~ s:rule_rx
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return 0
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let folded_lnum = lnum + 1
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if folded_line =~ s:rule_rx
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if getline(v:lnum) =~ s:rule_rx
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return 0
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else
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return &ts
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endif
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else
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" elseif folded_line =~ s:folded_assignment_rx
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if getline(v:lnum) =~ s:rule_rx
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return 0
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else
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return indent(folded_lnum)
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endif
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" else
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" " TODO: ?
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" return indent(prev_lnum)
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endif
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elseif prev_line =~ s:rule_rx
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if getline(v:lnum) =~ s:rule_rx
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return 0
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else
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return &ts
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endif
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elseif prev_line =~ s:conditional_directive_rx
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return &sw
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else
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return indent(v:lnum - 1)
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let line = getline(v:lnum)
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if line =~ s:just_inserted_rule_rx
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return 0
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elseif line =~ s:end_conditional_directive_rx
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return v:lnum - 1 == 0 ? 0 : indent(v:lnum - 1) - &sw
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else
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return v:lnum - 1 == 0 ? 0 : indent(v:lnum - 1)
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endif
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endif
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endfunction
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Bram Moolenaar