bash 从文件名中提取版本号
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Extracting version number from a filename
提问by Abeed Salam
I have a file in a folder like this:
我在这样的文件夹中有一个文件：
installer-x86_64-XXX.XX-diagnostic.run
安装程序-x86_64-XXX.XX-diagnostic.run
where XXX.XX is a version number and I need the version number only. How to do it in linux?
其中 XXX.XX 是版本号，我只需要版本号。在 linux 中如何实现？
I have this code:
我有这个代码：
#!/bin/bash
current_ver=$(find /mnt/builds/current -name '*.run'|awk -F/ '{print $NF}')
So this gives me just the name of the file correctly (minus the location, which I don't want).
所以这给了我正确的文件名（减去我不想要的位置）。
But how do I only get the XXX.XX version number into a variable such as $version
但是我如何只将 XXX.XX 版本号放入一个变量中，例如 $version
采纳答案by Nikos C.
You want:
你要：
awk -F"-" '{ print }'
With -Fyou specify the delimiter. In this case, -. The version number is the third field, so that's why you need $3.
与-F您指定分隔符。在这种情况下，-。版本号是第三个字段，所以这就是为什么你需要$3.
回答by ghoti
You actually don't need any external tools. You can do this entirely within bash, by chopping variables according to patterns..
您实际上不需要任何外部工具。您可以完全在 bash 中执行此操作，方法是根据模式切割变量。
[ghoti@pc ~]$ name="installer-x86_64-XXX.XX-diagnostic.run"
[ghoti@pc ~]$ vers=${name#*-}; echo $vers
x86_64-XXX.XX-diagnostic.run
[ghoti@pc ~]$ vers=${vers#*-}; echo $vers
XXX.XX-diagnostic.run
[ghoti@pc ~]$ vers=${vers%-*}; echo $vers
XXX.XX
[ghoti@pc ~]$
Or if you prefer, you can chop off pieces right-hand-side first:
或者，如果您愿意，可以先切掉右手边的碎片：
[ghoti@pc ~]$ name="installer-x86_64-XXX.XX-diagnostic.run"
[ghoti@pc ~]$ vers=${name%-*}; echo $vers
installer-x86_64-XXX.XX
[ghoti@pc ~]$ vers=${vers##*-}; echo $vers
XXX.XX
[ghoti@pc ~]$
Of course, if you want to use external tools, that's fine too.
当然，如果你想使用外部工具，那也可以。
[ghoti@pc ~]$ name="installer-x86_64-XXX.XX-diagnostic.run"
[ghoti@pc ~]$ vers=$(awk -F- '{print }' <<<"$name")
[ghoti@pc ~]$ echo $vers
XXX.XX
[ghoti@pc ~]$ vers=$(sed -ne 's/-[^-]*$//;s/.*-//;p' <<<"$name")
[ghoti@pc ~]$ echo $vers
XXX.XX
[ghoti@pc ~]$ vers=$(cut -d- -f3 <<<"$name")
[ghoti@pc ~]$ echo $vers
XXX.XX
[ghoti@pc ~]$
回答by Cez
Try:
尝试：
current_ver=$(find /mnt/builds/current -name '*.run'|grep -Eo '[0-9]+\.[0-9]+')
