Powershell help, how can I combine text files in a directory to one file?

I'm new to powershell. I'm trying to convert some of our database scripts to powershell scripts.开发者_开发技巧 One thing we do in our script currently (DOS BATCH FILE) is use the Type command...

@ECHO OFF

DEL *.sql 1>NUL 2>&1

TYPE ..\db\database\TuscanyProfileDB.sql > CreateDB.sql
TYPE ..\db\tbls\*.sql > CreateTables.sql
TYPE ..\db\foreignKeys\*.sql > CreateForeignKeys.sql
TYPE ..\db\indexes\*.sql > CreateIndexes.sql
TYPE ..\db\sprocs\*.sql > CreateSprocs.sql

It basically goes into the specified folder, and concatenates all the files with the .sql file extension and combines them into a new file.

My question is how can I do this in powershell?

Remove-Item *.sql

Get-Content ..\db\database\TuscanyProfileDB.sql | Add-Content CreateDB.sql
Get-Content ..\db\tbls\*.sql | Add-Content CreateTables.sql
Get-Content ..\db\foreignKeys\*.sql | Add-Content CreateForeignKeys.sql
Get-Content ..\db\indexes\*.sql | Add-Content CreateIndexes.sql
Get-Content ..\db\sprocs\*.sql | Add-Content CreateSprocs.sql

Here's what I use, adapted from here.

In my case I tend to have many directories, each one has many SQL files and I want to create a separate merged SQL file for each directory. I only want to merge the files that are prefixed with a number (e.g. 001_blah.sql) and my merged file gets named upgrade_{DIRECTORY}.sql (e.g. merged_1370_to_1380.sql).

I put my merge_sql_files.ps1 file in the parent directory and I put a merge.bat file in each of the directories with the SQL files.

merge.bat file looks like this

@ECHO OFF
SET PsFile=merge_sql_files.ps1
SET ThisScriptsDirectory=%~dp0
SET PowerShellScriptPath=%ThisScriptsDirectory%..\%PsFile%

PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '%PowerShellScriptPath%'";

merge_sql_files.ps1 looks like this:

# Script to merge SQL files together. 
# Takes all the SQL files that start with a number and concats 
# them together, putting a line with "GO" in betweeen each one. 
# The output is saved as upgrade_[DirectoryName].sql, e.g. 
# 'upgrade_1370_to_1380.sql'. 
#
# This script should be run from the folder with the sql files, 
# e.g. put a merge.bat file in the folder that runs this ps1 script.

 
$path = (Resolve-Path .\).Path
$dirName = (get-item $path).Name
$outFile = "${path}\upgrade_${dirName}.sql"
 
if((Test-Path $outFile) -eq $true) {Remove-Item -Path $outFile -Force}
 
# Get all the SQL files that start with a number. Sort them 
$files = Get-ChildItem -LiteralPath $path -Include "*.sql" | where {$_.Name -match "^[0-9]" } | Sort-Object -Property Name
 
New-Item -ItemType file -Path $outFile -Force | Out-Null
 
foreach($file in $files)
{
    Write-Host "Appending file $file..." -ForegroundColor Gray
    $content = Get-Content -Path $file.FullName
    Add-Content -Path $outFile "----------------------------------------------------------------------------------------------------------------------------------------------------------------"
    Add-Content -Path $outFile "--      $File"
    Add-Content -Path $outFile "----------------------------------------------------------------------------------------------------------------------------------------------------------------"
    Add-Content -Path $outFile $content
    Add-Content -Path $outFile "GO`r`n"
}
 
Write-Host "Completed file $outFile" -ForegroundColor DarkGreen

# If running in the console, wait for input before closing.
if ($Host.Name -eq "ConsoleHost")
{
    Write-Host "Press any key to continue..."
    $Host.UI.RawUI.FlushInputBuffer()   # Make sure buffered input doesn't "press a key" and skip the ReadKey().
    $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyUp") > $null
}