Add basic Swift package manifest

Author: Jeehut

Package.resolved

@@ -0,0 +1,106 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "abseil",
+        "repositoryURL": "https://github.com/firebase/abseil-cpp-SwiftPM.git",
+        "state": {
+          "branch": null,
+          "revision": "05d8107f2971a37e6c77245b7c4c6b0a7e97bc99",
+          "version": "0.20200225.0"
+        }
+      },
+      {
+        "package": "Segment",
+        "repositoryURL": "https://github.com/segmentio/analytics-ios.git",
+        "state": {
+          "branch": null,
+          "revision": "fb56c304db5b5c2248f03f7a814cdc097b71f94a",
+          "version": "4.1.3"
+        }
+      },
+      {
+        "package": "BoringSSL-GRPC",
+        "repositoryURL": "https://github.com/firebase/boringssl-SwiftPM.git",
+        "state": {
+          "branch": null,
+          "revision": "7bcafa2660bc58715c39637494550d1ed7cd7229",
+          "version": "0.0.7"
+        }
+      },
+      {
+        "package": "Firebase",
+        "repositoryURL": "https://github.com/firebase/firebase-ios-sdk.git",
+        "state": {
+          "branch": null,
+          "revision": "a8d209a86090fdf6d2087ae6a001d5e3ecaa5ba9",
+          "version": "7.5.0"
+        }
+      },
+      {
+        "package": "GoogleAppMeasurement",
+        "repositoryURL": "https://github.com/google/GoogleAppMeasurement.git",
+        "state": {
+          "branch": null,
+          "revision": "58ae309ad8e3b198e2d9fde648b50f09ce9aba7a",
+          "version": "7.5.0"
+        }
+      },
+      {
+        "package": "GoogleUtilities",
+        "repositoryURL": "https://github.com/google/GoogleUtilities.git",
+        "state": {
+          "branch": null,
+          "revision": "7fa255f7b57ac2b79effa56652ed693002d4fb01",
+          "version": "7.2.0"
+        }
+      },
+      {
+        "package": "gRPC",
+        "repositoryURL": "https://github.com/firebase/grpc-SwiftPM.git",
+        "state": {
+          "branch": null,
+          "revision": "91b62619e6c83bc5f1b99d9d60fe46b2862d3a5a",
+          "version": "1.28.2"
+        }
+      },
+      {
+        "package": "GTMSessionFetcher",
+        "repositoryURL": "https://github.com/google/gtm-session-fetcher.git",
+        "state": {
+          "branch": null,
+          "revision": "91ed3d188eb95705fef3c249453b81f32dc557d1",
+          "version": "1.5.0"
+        }
+      },
+      {
+        "package": "leveldb",
+        "repositoryURL": "https://github.com/firebase/leveldb.git",
+        "state": {
+          "branch": null,
+          "revision": "fa1f25f296a766e5a789c4dacd4798dea798b2c2",
+          "version": "1.22.1"
+        }
+      },
+      {
+        "package": "nanopb",
+        "repositoryURL": "https://github.com/firebase/nanopb.git",
+        "state": {
+          "branch": null,
+          "revision": "c2d43e59d8ec880ed261366818f0cacc5c8cc2e6",
+          "version": "2.30907.0"
+        }
+      },
+      {
+        "package": "Promises",
+        "repositoryURL": "https://github.com/google/promises.git",
+        "state": {
+          "branch": null,
+          "revision": "afa9a1ace74e116848d4f743599ab83e584ff8cb",
+          "version": "1.2.12"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Package.swift

@@ -0,0 +1,23 @@
+// swift-tools-version:5.3
+import PackageDescription
+
+let package = Package(
+    name: "SegmentFirebase",
+    platforms: [.macOS(.v10_10), .iOS(.v8)],
+    products: [.library(name: "SegmentFirebase", targets: ["SegmentFirebase"])],
+    dependencies: [
+      .package(name: "Segment", url: "https://github.com/segmentio/analytics-ios.git", from: "4.1.2"),
+      .package(name: "Firebase", url: "https://github.com/firebase/firebase-ios-sdk.git", from: "7.5.0"),
+    ],
+    targets: [
+        .target(
+            name: "SegmentFirebase",
+            dependencies: [
+              "Segment",
+              .product(name: "FirebaseAnalytics", package: "Firebase"),
+            ],
+            path: "Segment-Firebase/Classes",
+            publicHeadersPath: "include"
+        )
+    ]
+)