Initial

Author: doozMen

.gitignore

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+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

Package.resolved

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+{
+  "pins" : [
+    {
+      "identity" : "swift-snapshot-testing",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/pointfreeco/swift-snapshot-testing",
+      "state" : {
+        "revision" : "696b86a6d151578bca7c1a2a3ed419a5f834d40f",
+        "version" : "1.13.0"
+      }
+    },
+    {
+      "identity" : "swift-syntax",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-syntax.git",
+      "state" : {
+        "revision" : "74203046135342e4a4a627476dd6caf8b28fe11b",
+        "version" : "509.0.0"
+      }
+    }
+  ],
+  "version" : 2
+}

Package.swift

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+// swift-tools-version: 5.7
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let lib = "SnapshotTestingCli"
+
+let package = Package(
+    name: "swift-snapshot-testing-cli",
+    platforms: [.macOS(.v13)],
+    products: [.library(name: lib, targets: [lib]),],
+    dependencies: [
+      .package(url: "https://github.com/pointfreeco/swift-snapshot-testing", from: "1.13.0")
+    ],
+    targets: [ 
+      .target(
+      name: lib, 
+      dependencies: [
+        .product(name: "InlineSnapshotTesting", package: "swift-snapshot-testing"),
+        .product(name: "SnapshotTesting", package: "swift-snapshot-testing"),
+      ]),]
+)

README.md

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+# swift snapshot testing + cli
+
+Very small addition to https://github.com/pointfreeco/swift-snapshot-testing
+
+## Use case
+
+To update tests in a swift package from commandline rather then in code.
+
+```
+export SNAPSHOT_TESTING_UPDATE_TESTS=true &&swift test --generate-linuxmain
+```
+
+## Discussion
+
+I wonder if it would be a nice addition and I am dissussing it here https://github.com/pointfreeco/swift-snapshot-testing/discussions/457#discussioncomment-6998554

Sources/SnapshotTestingCli/XCTestCaseSnapshot.swift

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+import SnapshotTesting
+import XCTest
+import InlineSnapshotTesting
+
+/// Convenience that looks for an environment variable  SNAPSHOT_TESTING_UPDATE_TESTS that can be set to true in order to
+/// have the tests update from commandline
+open class XCTestCaseSnapshot: XCTestCase {
+  open override class func setUp() {
+    super.setUp()
+    SnapshotTesting.diffTool = "ksdiff"
+    InlineSnapshotTesting.diffTool = SnapshotTesting.diffTool
+    let isRecording = Bool(ProcessInfo.processInfo.environment["SNAPSHOT_TESTING_UPDATE_TESTS"] ?? "false") ?? false
+    SnapshotTesting.isRecording = isRecording
+    InlineSnapshotTesting.isRecording = isRecording
+  }
+}