きっとみんな大好きxargs
いまさらxargsの便利さを主張してみる
http://openlab.dino.co.jp/2008/02/20/133431188.html
xargs - 知らないと損する大変便利なコマンド
http://www.syboos.jp/linux/doc/xargs-command.html
gaucheで書いてみる
myxargs.scm
(use gauche.process) (use file.util) (define (myxargs path command) (cond ( (not (file-exists? path)) (print path " not found.")) ((file-is-directory? path) (run-process (append command (list path)) :wait #t) (for-each (lambda (l) (myxargs l command)) (directory-list path :add-p ath? #t :children? #t))) (else (run-process (append command (list path)) :wait #t)) ) )
find+xargsとの比較
echo
$ find ./test | xargs echo ./test ./test/b ./test/b/e.txt ./test/b/f.txt ./test/c ./test/c/fibo.c ./test/a ./test/a/d.txt $ rlwrap gosh gosh> (load "./scripts/myxargs.scm") #t gosh> (myxargs "./test" '(echo)) ./test ./test/a ./test/a/d.txt ./test/b ./test/b/e.txt ./test/b/f.txt ./test/c ./test/c/fibo.c #
wc -l
$ find ./test | xargs wc -l wc: ./test: ディレクトリです 0 ./test wc: ./test/b: ディレクトリです 0 ./test/b 9 ./test/b/e.txt 0 ./test/b/f.txt wc: ./test/c: ディレクトリです 0 ./test/c 23 ./test/c/fibo.c wc: ./test/a: ディレクトリです 0 ./test/a 1 ./test/a/d.txt 33 合計 ... gosh> (myxargs "./test" '(wc -l)) wc: ./test: ディレクトリです 0 ./test wc: ./test/a: ディレクトリです 0 ./test/a 1 ./test/a/d.txt wc: ./test/b: ディレクトリです 0 ./test/b 9 ./test/b/e.txt 0 ./test/b/f.txt wc: ./test/c: ディレクトリです 0 ./test/c 23 ./test/c/fibo.c #
nkf --guess
$ find ./test | xargs nkf --guess ./test: ASCII ./test/b: ASCII ./test/b/e.txt: EUC-JP (LF) ./test/b/f.txt: ASCII ./test/c: ASCII ./test/c/fibo.c: ASCII (LF) ./test/a: ASCII ./test/a/d.txt: ASCII (LF) ... gosh> (myxargs "./test" '(nkf --guess)) ASCII ASCII ASCII (LF) ASCII EUC-JP (LF) ASCII ASCII ASCII (LF) #
改善の余地は多いなぁ。。
参照したURL:
http://practical-scheme.net/gauche/man/gauche-refj_92.html
