Add windows support to the grep linter

[justinchuby]

Potentially using Select-String and replace

Select-String -Pattern 'n' -AllMatches

[justinchuby]

ChatGPT:

In PowerShell, you can use the -replace operator to perform regular expression-based text replacements, which is somewhat similar to using sed with the -r option in Unix-like systems. However, PowerShell doesn't have an exact equivalent for the -r option in sed, which enables extended regular expressions.

Here's how you can use the -replace operator in PowerShell to perform regular expression-based text replacements:

# Basic usage of -replace without extended regular expressions
$text = "Hello, World!"
$newText = $text -replace "Hello", "Hi"

If you specifically need extended regular expressions, you can use the [regex]::Replace() method, which supports extended regular expressions:

# Using [regex]::Replace() with extended regular expressions
$text = "Hello, World!"
$newText = [regex]::Replace($text, "H.llo", "Hi")

In this example, we're using the . to match any character in place of the letter o, which is an example of extended regular expression syntax.

Keep in mind that while PowerShell's -replace operator and [regex]::Replace() method provide regular expression capabilities, they don't support all the features of extended regular expressions that -r does in sed. PowerShell's regular expressions are based on the .NET Framework's regular expression engine, which is different from the one used in sed.

[justinchuby]

In PowerShell, you can use the Select-String cmdlet to perform operations similar to grep in Unix-like systems. To achieve the equivalent of grep -nEHI, you can combine several parameters and options in Select-String as follows:

• -Pattern: Specifies the regular expression pattern to search for.
• -Path: Specifies the file(s) to search in.
• -AllMatches: Returns all matches in each line (equivalent to -E in grep).
• -IgnoreCase: Performs a case-insensitive search (equivalent to -i in grep).
• -LineNumber: Shows line numbers for matched lines (equivalent to -n in grep).

Here's how you can use Select-String with these options to replicate the behavior of grep -nEHI:

Select-String -Pattern 'your_pattern' -Path 'your_files' -AllMatches -IgnoreCase | Select-Object -Property LineNumber,Line

Replace 'your_pattern' with the regular expression you want to search for, and 'your_files' with the path to the file(s) you want to search in.

Here's a breakdown of what each part does:

• Select-String -Pattern 'your_pattern' -Path 'your_files' -AllMatches -IgnoreCase searches for the specified pattern in the specified file(s) with case-insensitivity and returns all matching occurrences.
• Select-Object -Property LineNumber,Line then formats the output to include line numbers and the matched lines.

This PowerShell command should give you similar functionality to grep -nEHI in Unix-like systems.

[guotuofeng]

could we use Python to implement the grep like https://stackoverflow.com/questions/1921894/grep-and-python?

[guotuofeng]

Basically, the grep -nEHI '[[:blank:]]$' behaves differently in Windows, Linux and Windows WSL. From the time being, the search only works in Linux.

In Windows, I have to use [[:space:]] for the match. in WSL, [[:blank:]] doesn't match anything and [[:space:]] would print lots of empty lines.

Windows grep using https://gnuwin32.sourceforge.net/packages/grep.htm:

WSL:

[justinchuby]

could we use Python to implement the grep like stackoverflow.com/questions/1921894/grep-and-python?

I think so! There's going to be some performance penalties, but better for it to work than failing I guess