# Simple tool to merge C projects into a single C file
import os, sets, pegs
type
ProcessResult = enum prSkipIncludeDir, prAddIncludeDir
proc process(dir, infile: string, outfile: File,
processed: var HashSet[string]): ProcessResult =
if processed.containsOrIncl(infile): return prSkipIncludeDir
let toProcess = dir / infile
if not existsFile(toProcess):
echo "Warning: could not process: ", toProcess
return prAddIncludeDir
echo "adding: ", toProcess
for line in lines(toProcess):
if line =~ peg"""s <- ig '#include' ig '"' {[^"]+} '"' ig
comment <- '/*' !'*/'* '*/' / '//' .*
ig <- (comment / \s+)* """:
# follow the include file:
if process(dir, matches[0], outfile, processed) == prAddIncludeDir:
writeLine(outfile, line)
else:
writeLine(outfile, line)
proc main(dir, outfile: string) =
var o: File
if open(o, outfile, fmWrite):
var processed = initSet[string]()
processed.incl(outfile)
for infile in walkfiles(dir / "*.c"):
discard process(dir, extractFilename(infile), o, processed)
close(o)
else:
quit("Cannot open for writing: " & outfile)
if paramCount() != 2:
quit "Usage: cmerge directory outfile"
else:
main(paramStr(1), addFileExt(paramStr(2), "c"))