Powershell通配符/正则表达式替换

Question

I am trying to write a PowerShell script to update my .nuspec file (nuget depdency) to the latest build version. I am having trouble with the wildcards though.

So I want to replace the version number of this line

<dependency id="MyCompany.Common" version="1.0.0.0" />

to a new version number, ie version 2.2.2.2

<dependency id="MyCompany.Common" version="2.2.2.2" />

My current place method looks like this. Note I need a wildcard as I have multiple nuget packages in the solution I need to replace, all follow the format of MyCompany.PackageName

$filecontent -replace 'id="MyCompany.*" version="*"', "$Version" | Out-File $file

But this actually ends up creating

<dependency 2.2.2.21.0.0.0" />

How do I modify my regex to ensure it replaces the version number component only?

Answer 1

用。。。来代替

$filecontent -replace 'id="MyCompany(.*?)" version=".*?"', "id=`"MyCompany`$1`" version=`"$Version`"" | Out-File $file

Answer 2

I went with a simple use of a capture group so I don't lose the specificity of your regex, matches only strings with 'MyCompany.*' in id, but doesnt add a lot of complexity. I capture everything up to the opening quote in version and replace whatever is before the next quote with the new version number.

$test='<dependency id="MyCompany.Common" version="1.0.0.0" />'
$newVersion='2.2.2.2'
$test -replace "(id=`"MyCompany`..*`" version=)`"[^`"]*","`$1`"$newVersion"

<dependency id="MyCompany.Common" version="2.2.2.2" />

Tested in PS 4.0

Powershell oddities and fragile bits include:

• backtick to escape instead of \\

• regex must be in "double quotes"

• must either use single quotes or escapes to have capture groups work in the replacement string

Answer 3

$s = '<dependency id="MyCompany.Common" version="2.2.2.2" />'
$s -replace 'version=".*"', 'version="1.2.3.4"'<dependency id="MyCompany.Common" version="1.2.3.4" />