Enable custom scripts to run on Git hooks

.gitignore

@@ -19,6 +19,7 @@ UpgradeLog.htm
 *.opendb
 
 /Dist/*.zip
+/Dist/git_hooks/*.local.ps1
 
 # mupen64plus-win32-deps is a submodule, so ignores should be in that repo
 /libmupen64plus/mupen64plus-win32-deps/SDL-1.2.14/docs

Dist/git_hook_shim.sh

@@ -1,3 +1,5 @@
 #!/bin/sh
 set -e
-dotnet pwsh "./Dist/git_hooks/$(basename "$0").ps1" "$@"
+kind="$(basename "$0")"
+dotnet pwsh "./Dist/git_hooks/$kind.ps1" "$@"
+if [ -e "./Dist/git_hooks/$kind.local.ps1" ]; then dotnet pwsh "./Dist/git_hooks/$kind.local.ps1" "$@"; fi

Dist/install_git_hooks.ps1

@@ -10,7 +10,6 @@ if (Test-Path $targetDir -PathType Container) { # is Git repo
 		} elseif ($(Get-FileHash $target).Hash -ne $(Get-FileHash $f.FullName).Hash) { # files differ
 			$head = Get-Content $target -TotalCount 3
 			echo "[$PSCommandFilename] found existing Git hook $($f.Name), please resolve conflict manually"
-			#TODO should REALLY make the scripts extensible then...
 			exit 1
 		}
 		# else no-op