codesigning (#35)

* codesign mac bins/libs

* test bin

* fix codesign checker

.github/workflows/build.yml

@@ -91,6 +91,43 @@ jobs:
           GITHUB_TOKEN: ${{ github.token }}
           FORCE_UNSAFE_CONFIGURE: 1  # some configure scripts refuse to run as root
 
+      # the next three steps bless our code for Apple. It might be the case they should be
+      # encapulated separately.
+      # FIXME: using an explicit commit in a PR isn't great, but the last release was almost 3 years
+      # ago, and we need bugfixes.
+      # FIXME: replace this with a tea script based on https://localazy.com/blog/how-to-automatically-sign-macos-apps-using-github-actions
+      # github has a doc with similar content, but it's not returning to me atm.
+      - uses: apple-actions/import-codesign-certs@d54750db52a4d3eaed0fc107a8bab3958f3f7494
+        if: matrix.tag == 'darwin-aarch64' || matrix.os == 'macos-11'
+        with:
+          p12-file-base64: ${{ secrets.APPLE_CERTIFICATE_P12 }}
+          p12-password: ${{ secrets.APPLE_CERTIFICATE_P12_PASSWORD }}
+
+      # Codesign libs and bins
+      - name: Codesign package
+        if: matrix.tag == 'darwin-aarch64' || matrix.os == 'macos-11'
+        run: |
+          for PKG in ${{ steps.build.outputs.relative-paths }}; do
+            find /opt/$PKG -name '*.so' -or -name '*.dylib' -print0 | \
+              xargs -0 codesign -s "Developer ID Application: Tea Inc. (7WV56FL599)" --force -v --deep --timestamp --preserve-metadata=entitlements -o runtime || true
+            codesign -s "Developer ID Application: Tea Inc. (7WV56FL599)" -v --force --deep --timestamp --preserve-metadata=entitlements -o runtime /opt/$PKG/bin/* || true
+          done
+
+      # This isn't very informative, but even a no-op is safer than none
+      - name: Check codesigning
+        if: matrix.tag == 'darwin-aarch64' || matrix.os == 'macos-11'
+        run: |
+          for PKG in ${{ steps.build.outputs.relative-paths }}; do
+            for SIG in `find /opt/$PKG -name '*.so' -or -name '*.dylib'` `find /opt/$PKG/bin -type f`; do
+              codesign -vvv --deep --strict "$SIG"
+            done
+          done
+
+      # Needed for self-hosted runner, since it doesn't destroy itself automatically.
+      - name: Delete keychain
+        if: always() && matrix.tag == 'darwin-aarch64'
+        run: security delete-keychain signing_temp.keychain
+
       # tarring ourselves ∵ GHA-artifacts (ludicrously) lose permissions
       # /ref https://github.com/actions/upload-artifact/issues/38
       - run: