emacs flycheckでSwiftの構文チェックを行う ref: http://qiita.com/ponpoko1968/items/78629472038c019f9f4d

file0.txt

$ brew instal xctool

file1.txt

$ xctool -workspace ./${PROJECT}.xcworkspace -scheme ${PROJECT} -reporter json-compilation-database -sdk iphonesimulator build 

file2.txt

[
  {
    "command" : "<コンパイルコマンドライン>",
    "file" : "<対象ファイル>",
    "directory" : "<ディレクトリ>"
...
  }
]

file3.txt

(flycheck-define-checker swift
  "Flycheck plugin for for Apple's Swift programming language."
  :command ("<your-bin-directory>/compile_swift"
            source-original)
  :error-patterns
  ((error line-start (file-name) ":" line ":" column ": "
          "error: " (message) line-end)
   (warning line-start (file-name) ":" line ":" column ": "
            "warning: " (message) line-end))
  :modes swift-mode)

...

(add-hook 'swift-mode-hook
  '(lambda()
     (add-to-list 'flycheck-checkers 'swift)
     ...
     )
)

file4.txt

#!/usr/bin/env python
import sys
import json
import re
import os.path
def main():
    sources=[]
    with  open( sys.argv[1] ) as f:
        result = json.load(f)
        for l in result:
            line = l["command"]
            dir = l["directory"]
            if os.path.basename(dir) == 'Pods':
                continue
            primary_file = re.search("-primary-file ([^ ]+) ",line)
            if primary_file:
                srcs = re.search("-c (.+) -target",line)
                list = []
                for src in srcs.group(1).split(' '):
                    if src == '-primary-file':
                        continue
                    sources.append(src)
                print(primary_file.group(1),file=sys.stderr)
                prefix = (os.path.basename(primary_file.group(1)).split('.'))[0]
                replaced = re.sub("-frontend", '-frontend -parse',line)
                replaced = re.sub("-c (.+) -target", '-c ${SRCS} -primary-file $1 -target',replaced)
                replaced = re.sub(prefix, '${PRIMARY_PREFIX}',replaced)

                cmd =  """\
#!/bin/bash
SRCS="%s"
PRIMARY=`basename $1`
PRIMARY_PREFIX=${PRIMARY%%.swift}
%s""" % (' '.join(sources), replaced)
                print(cmd)
                break

if __name__ == '__main__':
    main()