groovy正则表达式tokenize（）。grep（）函数没有产生预期的答案

Question

我试图从groovy中使用一些正则表达式函数从git仓库中提取版本标签。

def command = "\"C:/Program Files (x86)/Git/bin/sh.exe\" --login -i -c \"git ls-remote user@mysever:myproject.git refs/tags/[vV]*?.*?.*?\"" 
def proc = command.execute() 
proc.waitFor() 

def str = proc.in.text 
def pattern = ~/^refs\/tags\/[vV][0-9]+\.[0-9]+\.[0-9]+$/ 
System.out.println("is everything a string? " + str.tokenize().every{ it instanceof String }) 
System.out.println("String: $str") 
System.out.println("split: ${str.split()}") 
System.out.println("contains refs/tags/V0.0.0?: ${str.split()*.trim().contains('refs/tags/V0.0.0')}") 
System.out.println("contains refs/tags/V0.0.1?: ${str.split()*.trim().contains('refs/tags/V0.0.1')}") 
System.out.println("grep: " + ['refs/tags/V0.0.0', 'refs/tags/V0.0.1'].grep(pattern)) 
System.out.println("split grep: " + str.split().grep(pattern)) 
System.out.println("split findAll: " + str.split().findAll{ it =~ pattern }) 

而且我的输出是这样的：

String: SHA1asdf refs/tags/V0.0.0 
SHA1fdsa refs/tags/V0.0.0^{} 
SHA1hgfd refs/tags/V0.0.l 
SHA1dfgh refs/tags/V0.0.l^{} 

split: [SHA1asdf, refs/tags/V0.0.0, SHA1asdf, refs/tags/V0.0.0^{}, SHA1hgfd, refs/tags/V0.0.l, SHA1dfgh, refs/tags/V0.0.l^{}] 
contains refs/tags/V0.0.0?: true 
contains refs/tags/V0.0.1?: false 
grep: [refs/tags/V0.0.0, refs/tags/V0.0.1] 
split grep: [refs/tags/V0.0.0] 
split findAll: [refs/tags/V0.0.0] 

为什么不是令牌化（）的grep（）产生预期的答案？

我使用Groovy 2.3.6

更新：我添加了更多的测试结果，看到代码和输出

Answer 1

不知道为什么，但你V0.0.1版本实际上是一个性格l而不是1。

如果你只是运行下面的示例（只是改变了str），grep的将工作得很好：

def str = """ 
SHA1asdf refs/tags/V0.0.0 
SHA1fdsa refs/tags/V0.0.0^{} 
SHA1hgfd refs/tags/V0.0.1 
SHA1dfgh refs/tags/V0.0.1^{} 
""" 

def pattern = ~/^refs\/tags\/[vV][0-9]+\.[0-9]+\.[0-9]+$/ 
System.out.println("String: $str") 
System.out.println("tokenize: ${str.tokenize()}") 
System.out.println("grep: " + ["refs/tags/V0.0.0", "refs/tags/V0.0.1"].grep(pattern)) 
System.out.println("tokenize grep: " + str.tokenize().grep(pattern)) 

产生

grep: [refs/tags/V0.0.0, refs/tags/V0.0.1] 
tokenize grep: [refs/tags/V0.0.0, refs/tags/V0.0.1]