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62 lines
1.4 KiB
Python
62 lines
1.4 KiB
Python
# 'grep'
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import regex
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from regex_syntax import *
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import string
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opt_show_where = 0
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opt_show_filename = 0
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opt_show_lineno = 1
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def grep(pat, *files):
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return ggrep(RE_SYNTAX_GREP, pat, files)
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def egrep(pat, *files):
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return ggrep(RE_SYNTAX_EGREP, pat, files)
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def emgrep(pat, *files):
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return ggrep(RE_SYNTAX_EMACS, pat, files)
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def ggrep(syntax, pat, files):
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if len(files) == 1 and type(files[0]) == type([]):
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files = files[0]
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global opt_show_filename
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opt_show_filename = (len(files) != 1)
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syntax = regex.set_syntax(syntax)
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try:
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prog = regex.compile(pat)
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finally:
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syntax = regex.set_syntax(syntax)
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for filename in files:
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fp = open(filename, 'r')
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lineno = 0
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while 1:
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line = fp.readline()
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if not line: break
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lineno = lineno + 1
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if prog.search(line) >= 0:
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showline(filename, lineno, line, prog)
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fp.close()
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def showline(filename, lineno, line, prog):
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if line[-1:] == '\n': line = line[:-1]
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if opt_show_lineno:
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prefix = string.rjust(`lineno`, 3) + ': '
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else:
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prefix = ''
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if opt_show_filename:
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prefix = filename + ': ' + prefix
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print prefix + line
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if opt_show_where:
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start, end = prog.regs()[0]
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line = line[:start]
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if '\t' not in line:
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prefix = ' ' * (len(prefix) + start)
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else:
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prefix = ' ' * len(prefix)
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for c in line:
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if c <> '\t': c = ' '
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prefix = prefix + c
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if start == end: prefix = prefix + '\\'
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else: prefix = prefix + '^'*(end-start)
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print prefix
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