Adding iOS Build and Test to CI (#804)

* Add iOS SDK build and test to rust 1.25.0 version of travis CI build

* Address review comments

* Move iOS testing and document generation into post test jobs

.travis.yml

@@ -5,7 +5,7 @@ os: osx
 before_install:
   - brew install sqlcipher --with-fts
 rust:
-  - 1.25.0  # Must align with `build/version.rs`.
+  - 1.25.0
   - stable
   - beta
   - nightly
@@ -13,6 +13,15 @@ matrix:
   allow_failures:
     - rust: nightly
   fast_finish: true
+jobs:
+  include:
+    - stage: "Test iOS"
+      rust: 1.25.0
+      script: ./scripts/install-ios.sh
+      script: ./scripts/test-ios.sh
+    - stage: "Docs"
+      rust: 1.25.0
+      script: ./scripts/cargo-doc.sh
 script:
   - cargo test --verbose --all
   - cargo test --features edn/serde_support --verbose --all
@@ -24,12 +33,4 @@ script:
     for crate in "" "db" "db-traits" "ffi" "public-traits" "query-projector" "query-projector-traits" "query-pull" "sql" "tolstoy" "tolstoy-traits" "transaction" "tools/cli"; do
       cargo test --manifest-path ./$crate/Cargo.toml --verbose --no-default-features --features sqlcipher
     done
-after_success:
-  - |
-    if [[ "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" ]]; then
-      cargo doc &&
-      echo "<meta http-equiv=refresh content=0;url=mentat/index.html>" > target/doc/index.html &&
-      git clone https://github.com/davisp/ghp-import.git &&
-      ./ghp-import/ghp_import.py -n -p -f -r https://"$GH_TOKEN"@github.com/"$TRAVIS_REPO_SLUG.git" target/doc
-    fi
 cache: cargo

scripts/cargo-doc.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+if [[ "$TRAVIS_PULL_REQUEST" = "false" && "$TRAVIS_BRANCH" == "master" ]]; then
+    cargo doc &&
+    echo "<meta http-equiv=refresh content=0;url=mentat/index.html>" > target/doc/index.html &&
+    git clone https://github.com/davisp/ghp-import.git &&
+    ./ghp-import/ghp_import.py -n -p -f -r https://"$GH_TOKEN"@github.com/"$TRAVIS_REPO_SLUG.git" target/doc
+fi

scripts/test-ios.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Install iOS targets with Rustup. We need to install all targets as we are building a universal library.
+rustup target add aarch64-apple-ios armv7-apple-ios armv7s-apple-ios x86_64-apple-ios i386-apple-ios
+
+# The version of cargo-lipo in Crates.io doesn't contain any support for Cargo manifests in subdirectories and the build fail.
+# We therefore need to use a Beta version that contains the right code.
+cargo install --git https://github.com/TimNN/cargo-lipo --rev d347567ff337ee169ba46a624229a451dd6f6067
+
+# If we don't list the devices available then, when we come to pick one during the test run, Travis doesn't
+# think that there are any devices available and the build fails.
+# TODO: See if there is a less time consuming way of doing this.
+# instruments -s devices
+
+# Build Mentat as a universal iOS library.
+pushd ffi
+cargo lipo --release
+popd
+
+# Run the iOS SDK tests using xcodebuild.
+pushd sdks/swift/Mentat
+xcodebuild -configuration Debug -scheme "Mentat Debug" -sdk iphonesimulator test -destination 'platform=iOS Simulator,name=iPhone X,OS=11.4'
+popd