feat(sql-migrate): add installer

sql-migrate/install.ps1

@@ -0,0 +1,47 @@
+#!/usr/bin/env pwsh
+
+######################
+# Install sql-migrate #
+######################
+
+$pkg_cmd_name = "sql-migrate"
+
+$pkg_dst_cmd = "$Env:USERPROFILE\.local\bin\sql-migrate.exe"
+$pkg_dst = "$pkg_dst_cmd"
+
+$pkg_src_cmd = "$Env:USERPROFILE\.local\opt\sql-migrate-v$Env:WEBI_VERSION\bin\sql-migrate.exe"
+$pkg_src_bin = "$Env:USERPROFILE\.local\opt\sql-migrate-v$Env:WEBI_VERSION\bin"
+$pkg_src_dir = "$Env:USERPROFILE\.local\opt\sql-migrate-v$Env:WEBI_VERSION"
+$pkg_src = "$pkg_src_cmd"
+
+New-Item "$Env:USERPROFILE\Downloads\webi" -ItemType Directory -Force | Out-Null
+$pkg_download = "$Env:USERPROFILE\Downloads\webi\$Env:WEBI_PKG_FILE"
+
+# Fetch archive
+if (!(Test-Path -Path "$Env:USERPROFILE\Downloads\webi\$Env:WEBI_PKG_FILE")) {
+    Write-Output "Downloading sql-migrate from $Env:WEBI_PKG_URL to $pkg_download"
+    & curl.exe -A "$Env:WEBI_UA" -fsSL "$Env:WEBI_PKG_URL" -o "$pkg_download.part"
+    & Move-Item "$pkg_download.part" "$pkg_download"
+}
+
+if (!(Test-Path -Path "$pkg_src_cmd")) {
+    Write-Output "Installing sql-migrate"
+
+    Push-Location .local\tmp
+
+    Remove-Item -Path ".\sql-migrate-v*" -Recurse -ErrorAction Ignore
+    Remove-Item -Path ".\sql-migrate.exe" -Recurse -ErrorAction Ignore
+
+    Write-Output "Unpacking $pkg_download"
+    & tar xf "$pkg_download"
+
+    Write-Output "Install Location: $pkg_src_cmd"
+    New-Item "$pkg_src_bin" -ItemType Directory -Force | Out-Null
+    Move-Item -Path ".\sql-migrate.exe" -Destination "$pkg_src_bin"
+
+    Pop-Location
+}
+
+Write-Output "Copying into '$pkg_dst_cmd' from '$pkg_src_cmd'"
+Remove-Item -Path "$pkg_dst_cmd" -Recurse -ErrorAction Ignore | Out-Null
+Copy-Item -Path "$pkg_src" -Destination "$pkg_dst" -Recurse