Dynamically discover/build glob for ECLint (#957)

appveyor.yml

@@ -49,8 +49,8 @@ skip_commits:
 install:
 - npm install -g eclint
 - git rm .editorconfig
-- eclint check -n "**/*.{cs,tt,cmd,sh,md,txt,yml}"
-- eclint check -w "**/*.{cs,tt,cmd,sh,md,txt,yml,json,sln,csproj,shfbproj}"
+- pwsh: ./eclint.ps1 -InsertFinalNewline -Verbose
+- pwsh: ./eclint.ps1 -TrimTrailingWhitespace -Verbose
 - git reset --hard
 - ps: if ($isWindows) { tools\dotnet-install.ps1 -JSonFile global.json }
 - ps: if ($isWindows) { tools\dotnet-install.ps1 -Runtime dotnet -Version 6.0.11 -SkipNonVersionedFiles }

eclint.ps1

@@ -0,0 +1,55 @@
+[CmdletBinding(DefaultParameterSetName='Default')]
+param (
+    [Parameter(ParameterSetName='Default')]
+    [switch]$TrimTrailingWhitespace,
+    [Parameter(ParameterSetName='Default')]
+    [switch]$InsertFinalNewline,
+
+    [Parameter(Mandatory=$true, ParameterSetName='ShowGlob')]
+    [switch]$ShowGlob
+)
+
+$ErrorActionPreference = 'Stop'
+
+$exts =
+    git ls-files --eol |            # get versioned file paths with line endings
+    ? { $_ -notmatch '/-text\b' } | # exclude binary files
+    % { ($_ -split '\t', 2)[1] } |  # get file path
+    Split-Path -Extension |         # get file extension
+    ? { $_.Length -gt 1 } |         # exclude those without an extension
+    Sort-Object |                   # sort alphabetically
+    Select-Object -Unique |         # remove duplicates
+    % { $_.Substring(1) }           # remove leading dot
+
+$glob = "**/*.{$($exts -join ',')}"
+
+if ($PSCmdlet.ParameterSetName -eq 'ShowGlob') {
+    Write-Output $glob
+    return
+}
+
+if (-not (Get-Command eclint -ErrorAction SilentlyContinue)) {
+    throw 'ECLint is not installed. To install, run: npm install -g eclint'
+}
+
+$rules = @()
+
+if ($trimTrailingWhitespace) {
+    $rules += '--trim_trailing_whitespace'
+}
+
+if ($insertFinalNewline) {
+    $rules += '--insert_final_newline'
+}
+
+$rules | % {
+
+    Write-Verbose "eclint check $rule $glob"
+
+    # https://github.com/jednano/eclint
+    eclint check $_ $glob
+
+    if ($LASTEXITCODE) {
+        throw "eclint terminated with a non-zero exit code ($LASTEXITCODE)."
+    }
+}