I would like to change _ to - in all .md files from folder FOO. The code below does what I need but I don't how to save results in folder FOO or some other...
$mdfiles = gci *.md
gc $mdfiles | ForEach-Object {if ( $_ -match '^!') {$_ -replace '_', '-'} else {$_}} | out-file ...
A ForEach-Object is needed to iterate over the file names as well. Ternary expressions are in PowerShell Core, but I am not sure about Windows PowerShell. This is not tested, but might give a start.
Get-ChildItem -File -Path '.' -Filter '*.md' |
ForEach-Object {
$OutFile = ".\foo\$($_.Name)"
Get-Content -Path $_.FullName |
ForEach-Object { ($_ -match '^!') ? ($_ -replace '_','-') : ($_) } |
Out-File -FilePath $OutFile
}
Also, it is bad practice to use alias commands in a stored script.
Related
cd 'A:\P\E\D'
$files = Get-ChildItem . *.CSV -rec
ForEach ($file in $files) {
(Get-Content $file -Raw) | ForEach-Object {
*some simple code*
} | Set-Content $file
}
How to modify this powershell script to locate only files starting with letters A/a to O/o and ending with .csv in specified directory cd?
I thought the solution below would work, but the test file M_K_O_X.CSV stored in the cd directory was not found and modified. The solution above will find and modify the file. It's possible that I have the regex expression wrong or the problem is somewhere else? I tried also this regex -- "[A-O]..CSV"
cd 'A:\P\E\D'
$files = Get-ChildItem . -rec | Where-Object { $_.Name -like "[a-oA-O]*.*.CSV" }
ForEach ($file in $files) {
(Get-Content $file -Raw) | ForEach-Object {
*some simple code*
} | Set-Content $file
}
Looking at your wildcard pattern, seems like you have an extra *. that shouldn't be there:
'M_K_O_X.CSV' -like '[a-oA-O]*.*.CSV' # False
'M_K_O_X.CSV' -like '[a-oA-O]*.CSV' # True
In this case you could simply use the -Include Parameter which supports character ranges. Also PowerShell is case insensitive by default, [a-oA-O]*.CSV can be reduced to [a-o]*.CSV:
Get-ChildItem 'A:\P\E\D' -Recurse -Include '[a-o]*.csv' | ForEach-Object {
($_ | Get-Content -Raw) | ForEach-Object {
# *some simple code*
} | Set-Content -LiteralPath $_.FullName
}
As commented, I would use the standard wildcard -Filter to filter for all files with a .csv extension.
Then pipe to a Where-Object clause in which you can use regex -match
$files = Get-ChildItem -Path 'A:\P\E\D' -Filter '*.csv' -File -Recurse |
Where-Object { $_.Name -match '^[a-o]' }
foreach ($file in $files) {
# switch `-Raw` makes Get-Content return a single multiline string, so no need for a loop
$content = Get-Content -Path $file.FullName -Raw
# *some simple code manipulating $content*
$content | Set-Content -Path $file.FullName
}
However, if these are valid csv files, I would not recommend using a pure textual manipulation on them, instead use Import-Csv -Path $file.FullName and work on the properties on each of the objects returned.
I have many folder
ex: folder1,folder2,folder3... about folder100
In those folder have many files
ex: 1.html,2.html,3.html,4.html...about 20.html
I want to replace some text in those all html file in all folder
but not all text i want to replace is same.
ex:(for 1.html, i want to replace ./1_files/style.css to style.css) and (for 2.html, i want to replace ./2_files/style.css to style.css)....
So i try something like this and it work well
Get-ChildItem "*\1.html" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace './1_files/style.css', 'style.css' | Set-Content $_
}
Get-ChildItem "*\2.html" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace './2_files/style.css', 'style.css' | Set-Content $_
}
Get-ChildItem "*\3.html" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace './3_files/style.css', 'style.css' | Set-Content $_
}
Get-ChildItem "*\4.html" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace './4_files/style.css', 'style.css' | Set-Content $_
}
but i have to write many of those code "\4.html" "\5.html" "*\6.html" ...
i try this but it do not work
Do {
$val++
Write-Host $val
$Fn = "$val.html"
Get-ChildItem "*\$Fn" -Recurse | ForEach-Object -Process {
(Get-Content $_) -Replace './$val_files/style.css', 'style.css' |
Set-Content $_
}
} while($val -ne 100)
Please show me correct way to do..loop replace
thanks you
Assuming all your subfolders can be found inside one source folder path, you can do below to do the replacement in all those files:
# the path where all subfolders and html files can be found
$sourcePath = 'X:\Wherever\Your\Subfolders\Are\That\Contain\The\Html\Files'
Get-ChildItem -Path $sourcePath -Filter '*.html' -Recurse -File |
# filter on html files that have a numeric basename
Where-Object {$_.BaseName -match '(\d+)'} | ForEach-Object {
# construct the string to repace and escape the regex special characters
$replace = [regex]::Escape(('./{0}_files/style.css' -f $matches[1]))
# get the content as one single multiline string so -replace works faster
(Get-Content -Path $_.FullName -Raw) -replace $replace, 'style.css' |
Set-Content -Path $_.FullName
}
Goal
Exclude all sub-directories when running a PowerShell script that matches a filename regex pattern
Directory structure
/
- 2018-11-19.md
18-2/
- 2018-10-16.md
- 2019-01-14.md
- 2019-10-10.md
18-3/
- 2019-01-13.md
- 2019-04-25.md
PowerShell script
$file = '2018-11-19.md'
Get-ChildItem -recurse | where-object { $_.FullName -match '[0-9]{4}-[0-9]{2}-[0-9]{2}.md' } |
ForEach-Object {$fullname = $_.fullname; (Get-Content $_.fullname | foreach-object {
$_ -replace "apple", "orange"
}) | Set-Content $fullname}
(Get-Content $file | ForEach-Object {
$_ -replace '<p(.*?)>(.*?)</p>', '$2'
}) | Set-Content -Encoding Utf8 $file
Get-ChildItem -recurse | where-object { $_.FullName -match '[0-9]{4}-[0-9]{2}-[0-9]{2}.md' } |
foreach-Object {$fullname2 = $_.fullname; (Get-Content $_.fullname |
pandoc -f markdown -t markdown -o $fullname2 $fullname2
)}
Details
The goal is to run the PowerShell script on only file(s) in the root directory. These file(s) at root will change but always be named according to the convention shown. The regex in the PowerShell script successfully matches this filename.
Currently the script changes all files in the directory example above.
Any examples I can find show how to exclude specific directories by identifying their names in the script (e.g., -Exclude folder-name). I want to exclude all sub-directories without naming them specifically because...
...In the future sub-directories may be added for 18-4, 19-5, etc., so it seems like an exclusion based on a regex would make sense.
Attempts
To limit the script's scope to the root directory, I tried variations on -notmatch with \, \*, \*.*, \\*, etc., without success.
To exclude sub-directories, I tried variations on -Exclude with the same paths but did not succeed.
My PowerShell knowledge is not advanced enough to get further than this. I would be grateful for any help or to be pointed in the right direction. Thank you for any help.
As pointed out by Owain and gvee in the comments, when using the -Recurse switch, you tell the Get-ChildItem cmdlet that you wish to traverse through the sub directory structure from the selected location. As expained on the docs site of the cmdlet
Gets the items in the specified locations and in all child items of the locations.
So simply removing the switch should make the code do as you want.
If you ever want only X level of sub directories you can use -Depth switch.
Get-ChildItem | where-object { $_.FullName -match '[0-9]{4}-[0-9]{2}-[0-9]{2}.md' } |
ForEach-Object {$fullname = $_.fullname; (Get-Content $_.fullname | foreach-object {
$_ -replace "apple", "orange"
}) | Set-Content $fullname}
(Get-Content $file | ForEach-Object {
$_ -replace '<p(.*?)>(.*?)</p>', '$2'
}) | Set-Content -Encoding Utf8 $file
Get-ChildItem | where-object { $_.FullName -match '[0-9]{4}-[0-9]{2}-[0-9]{2}.md' } |
foreach-Object {$fullname2 = $_.fullname; (Get-Content $_.fullname |
pandoc -f markdown -t markdown -o $fullname2 $fullname2
)}
I have a PowerShell script that I use to change text in a number of files. The following script will work & changes the text as expected.
Get-ChildItem $FileFolder -Recurse |
select -ExpandProperty fullname |
foreach {
(Get-Content $_) |
ForEach-Object {$_ -replace $old $new } |
Set-Content $_
}
The problem is though, it changes every file that it opens, so everything has a timestamp of when the job was run even if nothing was changed.
I have tried something similar to what is here but it gives me an error:
The term 'if' is not recognized as the name of a cmdlet, function, etc...
Here is the code I am trying to run:
Get-ChildItem $FileFolder -Recurse |
select -ExpandProperty fullname |
foreach {
$b = ($a = Get-Content $_) |
ForEach-Object {$_ -replace $old $new } |
if (Compare $a $b -PassThru) {
$b | Set-Content $_
}
}
I know that the code isn't right, but if I move it inside the ForEach-Object, it won't run either.
What I want to do is to use the Set-Content statement only if the contents of the file have changed. Would appreciate any thoughts as to how best to do this.
What you can do is look for the string before getting and setting content. Something like:
Get-ChildItem $FileFolder -Recurse |
select -ExpandProperty fullname |
foreach {
If(Select-String -Path $_ -SimpleMatch $old -quiet){
(Get-Content $_) |
ForEach-Object {$_ -replace $old $new } |
Set-Content $_
}
}
How can I change the following code to look at all the .log files in the directory and not just the one file?
I need to loop through all the files and delete all lines that do not contain "step4" or "step9". Currently this will create a new file, but I'm not sure how to use the for each loop here (newbie).
The actual files are named like this: 2013 09 03 00_01_29.log. I'd like the output files to either overwrite them, or to have the SAME name, appended with "out".
$In = "C:\Users\gerhardl\Documents\My Received Files\Test_In.log"
$Out = "C:\Users\gerhardl\Documents\My Received Files\Test_Out.log"
$Files = "C:\Users\gerhardl\Documents\My Received Files\"
Get-Content $In | Where-Object {$_ -match 'step4' -or $_ -match 'step9'} | `
Set-Content $Out
Give this a try:
Get-ChildItem "C:\Users\gerhardl\Documents\My Received Files" -Filter *.log |
Foreach-Object {
$content = Get-Content $_.FullName
#filter and save content to the original file
$content | Where-Object {$_ -match 'step[49]'} | Set-Content $_.FullName
#filter and save content to a new file
$content | Where-Object {$_ -match 'step[49]'} | Set-Content ($_.BaseName + '_out.log')
}
To get the content of a directory you can use
$files = Get-ChildItem "C:\Users\gerhardl\Documents\My Received Files\"
Then you can loop over this variable as well:
for ($i=0; $i -lt $files.Count; $i++) {
$outfile = $files[$i].FullName + "out"
Get-Content $files[$i].FullName | Where-Object { ($_ -match 'step4' -or $_ -match 'step9') } | Set-Content $outfile
}
An even easier way to put this is the foreach loop (thanks to #Soapy and #MarkSchultheiss):
foreach ($f in $files){
$outfile = $f.FullName + "out"
Get-Content $f.FullName | Where-Object { ($_ -match 'step4' -or $_ -match 'step9') } | Set-Content $outfile
}
If you need to loop inside a directory recursively for a particular kind of file, use the below command, which filters all the files of doc file type
$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc
If you need to do the filteration on multiple types, use the below command.
$fileNames = Get-ChildItem -Path $scriptPath -Recurse -Include *.doc,*.pdf
Now $fileNames variable act as an array from which you can loop and apply your business logic.
Other answers are great, I just want to add... a different approach usable in PowerShell:
Install GNUWin32 utils and use grep to view the lines / redirect the output to file http://gnuwin32.sourceforge.net/
This overwrites the new file every time:
grep "step[49]" logIn.log > logOut.log
This appends the log output, in case you overwrite the logIn file and want to keep the data:
grep "step[49]" logIn.log >> logOut.log
Note: to be able to use GNUWin32 utils globally you have to add the bin folder to your system path.