... | fun x:: cmd1 x : cmd2 x : ... : cmdn x | ...
一行毎に処理する場合はxargs -Iを利用する。
$ ls *txt a.txt b.txt $ cat a.txt 1 $ cat b.txt 2 $ ls *txt | fun x:: echo x : cat x a.txt b.txt 1 2 $ ls *txt | xargs -Ix fun _:: echo x : cat x a.txt 1 b.txt 2
>と<はそれぞれ大小の不等号で置き換えてくださいな
#!/usr/bin/env python import sys from subprocess import * def take_variable(var): # check the syntax of variable (http://www.gnu.org/software/bash/manual/bash.html) # variable ::= (_|[A-z])(_|[A-z]|[0-9])* # variable contained space if len(var.split()) > 1: raise Exception('fail: the variable contained space') # check head if not (var[0].isalpha() or var[0] == '_'): raise Exception('fail: the variable contained wrong character') # check the body of variable b = True i = 0 for c in var[1:]: i += 1 # is variable contained invalid character? if not (c.isalpha() or c.isdigit() or c == '_'): b = False break # no exception if thre are only spaces after variable if not b and not var[i:].isspace(): raise Exception('fail: the variable contained wrong character') elif b: return var[0] else: return var[:i] def parse(var_to_cmds): # check the position of '::' try: pos = var_to_cmds.index('::') except Exception: raise Exception('not exists "::"') var = var_to_cmds[:pos] cmd_str = var_to_cmds[pos+2:] # check the format of variable and commands if var == '': raise Exception('fail: no variable before "::"') elif cmd_str == '': raise Exception('fail: no commands after "::"') return (take_variable(var),cmd_str) if __name__ == '__main__': # parse variable and commands try: var,cmd_str = parse(' '.join(sys.argv[1:])) except Exception, e: print >>sys.stderr, e sys.exit(1) # var -> val val = sys.stdin.read().replace('\n',' ') # mapping and split by ':' again commands = map( (lambda cmd: cmd.replace(' '+var+' ',' '+val+' ')), cmd_str.split(':')) # exec command for cmd in commands: try: # need split for remove spaces check_call(cmd.split()) except Exception,e: # print >>sys.stderr, e sys.exit(1)
本当はfunじゃなくて\(バックスラッシュ)で、:: じゃなくて→にしたかったんだけど、シェルが置き換えちゃうからしかたない
シェルの改造は禁断の手段だし
増田でコードの色分けってどうやるんです?
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