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grep 匹配一个字符串，但匹配不同的字符串

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grep 匹配一个字符串，但匹配不同的字符串

只需要获取 svn grn 中更改的文件（而不是创建分支）。为此我正在尝试这样：

情况1 ：

echo "   M /branches/Integration_release_23_branch/build/scripts/include/test.h" | \
grep -E "   . /[trunk/,branches].*[^from\ ]"

这应该匹配（并且它正在工作）

案例2：

echo "   A /branches/Integration_release_23_branch (from /branches/Integration_release_22_branch:34500)" |  grep -E "   . /[trunk/,branches].*[^from\ ]"

这不应该匹配（需要在末尾检查(fromor ）)

我无法让异常字符串正常工作。

答案1

给定这个输入文件：

$ cat ip.txt 
   M /branches/Integration_release_23_branch/build/scripts/include/test.h
   A /branches/Integration_release_23_branch (from /branches/Integration_release_22_branch:34500)
   dummy line 1
   M /trunk/Integration_release_23_branch/build/scripts/include/test.h
   dummy line 2
   A /trunk/Integration_release_23_branch (from /branches/Integration_release_22_branch:34500)

用于|搜索这个或那个模式

$ grep -E 'trunk|branches' ip.txt 
   M /branches/Integration_release_23_branch/build/scripts/include/test.h
   A /branches/Integration_release_23_branch (from /branches/Integration_release_22_branch:34500)
   M /trunk/Integration_release_23_branch/build/scripts/include/test.h
   A /trunk/Integration_release_23_branch (from /branches/Integration_release_22_branch:34500)

可以使用选项 将结果定向到另一个grep命令以排除from-v

$ grep -E 'trunk|branches' ip.txt | grep -v 'from '
   M /branches/Integration_release_23_branch/build/scripts/include/test.h
   M /trunk/Integration_release_23_branch/build/scripts/include/test.h

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