powershellreplacegithub-actionsazure-devops-wiki

Find a string and include character to a specific position

I have requirement to automate Azure wiki page with readme files via github actions. I have my readme files in several paths in github repo. "/community/widgets/document-details/readme.md" "/.pipeline/readme.md" "/examples/widgets/conference-session/readme" I need to pull all the paths, get the contents of the readme file and look for .png strings. png string are updated in format inside readme files.

Once I get all the png strings i need to replace it as below so that it is recognized in Azure wiki.

I am struggling to make this work using Get-Item, Get-content and for loop. Please help me with scripts

$Path = "/community/widgets/document-details/readme.md","/.pipeline/readme.md" 
$OldText = "image.png"
$NewText = "/.attachments/$OldText" 
ForEach ($item in $Path) {
  $content = Get-Content $Path | Where-Object {$_ -like '.png'} 
  Write-Host "content list is "$content 
  foreach ($entry in $content) {
    Write-Host $entry 
    $entry -replace $OldText, $NewText 
  } 
  Set-Content $Path 
}
Solution

  • If I understand correctly you're looking to prepend /.attachments/ to any .png Markdown link, if that's the case, you could use the pattern (?<=\]\()(?=.+\.png\)) and replace with /.attachments/.

    An example below:

    $text = @'
text text text ![foo](foo.png)
![bar](bar.png) text text text
text ![baz](baz.png) text text
'@

$text -replace '(?<=\]\()(?=.+\.png\))', '/.attachments/'

# Outputs:
#
# text text text ![foo](/.attachments/foo.png)
# ![bar](/.attachments/bar.png) text text text
# text ![baz](/.attachments/baz.png) text text

    Applied to your code:

    $Path = '/community/widgets/document-details/readme.md', '/.pipeline/readme.md'

foreach ($item in $Path) {
    (Get-Content $item -Raw) -replace '(?<=\]\()(?=.+\.png\))', '/.attachments/' |
        Set-Content $item
}

    See https://regex101.com/r/NbyUnq/3 for regex details.