英文:
replace xml value in shell
问题
我想用sed替换XML文件中的一个值：
这是原始行：
<ns3:myID>aaa:bb:cc:dd::123-sd3-7b</ns3:myID>
我想替换<ns3:myID>和</ns3:myID>之间的值。
我尝试了
sed -Ei - "s/(myID>).(<.)$/\1${MY_NEW_VALUE}\2/" path.xml
它确实替换了该值，但生成了一个新的临时文件，这是不可接受的，有人知道一个sed命令行，可以在不生成任何临时文件的情况下就地替换上述值吗？
英文:
I want to replace a value in XML file with sed:
here is the origin line:
<ns3:myID>aaa:bb:cc:dd::123-sd3-7b</ns3:myID>
I want to replace the values between <ns3:myID> and </ns3:myID>.
I tried
sed -Ei - "s/(myID\>).*(<.*)$/${MY_NEW_VALUE}/" path.xml
it does replace the value, but it generates a new temp file which is not acceptable, can someone know a sed command line that can in-place replace the above value without generating any temp files?
答案1
得分: 1
像这样：
- `-L` 等同于 `sed` 的 `-i`
- 命名空间的 URL 就是你的 `xml` 文件中 `xmlns:ns3` 后面的内容。```
<details>
<summary>英文:</summary>
Like this:
xmlstarlet edit -L -N ns3='<NAMESPACE URL>' -u '//ns3:myID' -v NEW_VALUE file.xml
- `-L` is equivalent to the `-i` of `sed`
- the namespace URL is what is after `xmlns:ns3` in your `xml` file.
</details>
# 答案2
**得分**: 0
以下是翻译好的部分：
"Some implementations need an extension for `-i` (case for [FreeBSD](https://nixdoc.net/man-pages/FreeBSD/man1/sed.1.html) and MacOS, but not for [OpenBSD](https://man.openbsd.org/sed) and GNU/Linux.) This non standard option may also have some [subtle meaning](https://www.unix.com/man-page/FreeBSD/1/sed/). You should really check the documentation of the `sed` command you're using and be aware of portability issue of your script (if using it via a script)"
<details>
<summary>英文:</summary>
Some implementations need an extension for `-i` (case for [FreeBSD](https://nixdoc.net/man-pages/FreeBSD/man1/sed.1.html) and MacOS, but not for [OpenBSD](https://man.openbsd.org/sed) and GNU/Linux.) This non standard option may also have some [subtle meaning](https://www.unix.com/man-page/FreeBSD/1/sed/). You should really check the documentation of the `sed` command you're using and be aware of portability issue of your script (if using it via a script)
</details>
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