Add basic Macos signing + notarizing workflow (#2319)

Adds basic CircleCI workflow to sign, notarize,
and staple MacOS app bundle and associated DMG,
then publishes signed binary in CircleCI artifacts

Signed-off-by: Adam Treat <treat.adam@gmail.com>

.circleci/continue_config.yml

@@ -77,8 +77,90 @@ jobs:
             ~/Qt/Tools/CMake/CMake.app/Contents/bin/cmake --build . --target package
             mkdir upload
             cp gpt4all-installer-* upload
+      # persist the unsigned installer
       - store_artifacts:
           path: build/upload
+      # add workspace so signing jobs can connect & obtain dmg
+      - persist_to_workspace:
+          root: build
+          # specify path to only include components we want to persist
+          # accross builds
+          paths:
+            - upload
+
+  sign-offline-chat-installer-macos:
+    macos:
+      xcode: 14.0.0
+    steps:
+      - checkout
+      # attach to a workspace containing unsigned dmg
+      - attach_workspace:
+          at: build
+      - run:
+          name: "Setup Keychain"
+          command: |
+            echo $MAC_SIGNING_CERT | base64 --decode > cert.p12
+            # cat \<<< "$MAC_SIGNING_CERT" > certs1.pem
+            # file certs1.pem
+            # iconv -c -f UTF8 -t ASCII certs1.pem > certs.pem
+            # openssl pkcs12 -legacy -export -out cert.p12 -in certs.pem -inkey certs.pem -passin pass:"$MAC_SIGNING_CERT_PWD" -passout pass:"$MAC_SIGNING_CERT_PWD"
+            security create-keychain -p "$MAC_KEYCHAIN_KEY" sign.keychain
+            security default-keychain -s sign.keychain
+            security unlock-keychain -p "$MAC_KEYCHAIN_KEY" sign.keychain
+            security import cert.p12 -k sign.keychain -P "$MAC_SIGNING_CERT_PWD" -T /usr/bin/codesign
+            security set-key-partition-list -S apple-tool:,apple:,codesign: -s -k "$MAC_KEYCHAIN_KEY" sign.keychain
+            rm cert.p12
+      - run:
+          name: "Sign App Bundle"
+          command: |
+            python3 -m pip install click
+            python3 gpt4all-chat/cmake/sign_dmg.py --input-dmg build/upload/gpt4all-installer-darwin.dmg --output-dmg build/upload/gpt4all-installer-darwin-signed.dmg --signing-identity "$MAC_SIGNING_CERT_NAME"
+      - run:
+          name: "Sign DMG"
+          command: |
+            codesign --options runtime --timestamp -s "$MAC_SIGNING_CERT_NAME" build/upload/gpt4all-installer-darwin-signed.dmg
+      # add workspace so signing jobs can connect & obtain dmg
+      - persist_to_workspace:
+          root: build
+          # specify path to only include components we want to persist
+          # accross builds
+          paths:
+            - upload
+
+  notarize-offline-chat-installer-macos:
+    macos:
+      xcode: 14.0.0
+    steps:
+      - checkout
+      - attach_workspace:
+          at: build
+      # - run:
+      #     name: "Setup Notarize Keychain"
+      #     command: |
+      #       security create-keychain
+      #       sudo xcrun notarytool store-credentials "notarytool-profile" --apple-id "$MAC_NOTARIZATION_ID" --team-id "$MAC_NOTARIZATION_TID" --password "$MAC_NOTARIZATION_KEY" --keychain /Library/Keychains/System.keychain
+      - run:
+          name: "Notarize"
+          command: |
+            xcrun notarytool submit build/upload/gpt4all-installer-darwin-signed.dmg --apple-id "$MAC_NOTARIZATION_ID" --team-id "$MAC_NOTARIZATION_TID" --password "$MAC_NOTARIZATION_KEY" --wait  | tee notarize_log.txt
+      - run:
+          name: "Report Notarization Failure"
+          command: |
+            NID=`python3 .circleci/grab_notary_id.py notarize_log.txt` && export NID
+            xcrun notarytool log $NID --keychain-profile "notary-profile"
+            exit 1
+          when: on_fail
+      # - run:
+      #     name: "Rename and move"
+      #     command: |
+      #       mv build/upload/gpt4all-installer-darwin-signed.dmg build/upload-signed/gpt4all-installer-darwin-signed.dmg
+      - run:
+          name: "Staple"
+          command: |
+            xcrun stapler staple build/upload/gpt4all-installer-darwin-signed.dmg
+      - store_artifacts:
+          path: build/upload
+
   build-offline-chat-installer-linux:
     machine:
       image: ubuntu-2204:2023.04.2
@@ -848,6 +930,12 @@ workflows:
       - build-offline-chat-installer-macos:
           requires:
             - hold
+      - sign-offline-chat-installer-macos:
+          requires:
+            - build-offline-chat-installer-macos
+      - notarize-offline-chat-installer-macos:
+          requires:
+            - sign-offline-chat-installer-macos
       - build-offline-chat-installer-windows:
           requires:
             - hold

.circleci/grab_notary_id.py

@@ -0,0 +1,17 @@
+import re
+import sys
+
+ID_REG = r"id: (.*)"
+
+def main() -> None:
+    notary_log = sys.argv[1]
+    with open(notary_log, "r") as f:
+        notary_output = f.read()
+        id_m = re.search(ID_REG, notary_output)
+        if id_m:
+            print(id_m.group(1))
+        else:
+            raise RuntimeError("Unable to parse ID from notarization logs")
+
+if __name__ == "__main__":
+    main()