SWIFT-536 Automate building examples in release script

Examples/Docs/Package.swift

@@ -4,7 +4,7 @@ import PackageDescription
 let package = Package(
     name: "DocsExamples",
     dependencies: [
-        .package(url: "https://github.com/mongodb/mongo-swift-driver", .branch("master"))
+        .package(url: "https://github.com/mongodb/mongo-swift-driver", .upToNextMajor(from: "0.1.0"))
     ],
     targets: [
         .target(name: "DocsExamples", dependencies: ["MongoSwift"])

etc/build-examples.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+exit_code=0
+
+examples=("BugReport" "Docs" "KituraExample" "PerfectExample" "VaporExample")
+
+for example_project in ${examples[@]}; do
+    echo "Building $example_project"
+    example_dir="Examples/${example_project}"
+
+    # replace version string with master
+    etc/sed.sh -i 's/swift-driver", .upToNextMajor[^)]*)/swift-driver", .branch("master")/' "${example_dir}/Package.swift"
+
+    pushd "${example_dir}"
+
+    # don't exit on failure
+    set +e
+    swift build
+    build_success=$?
+    set -e
+
+    rm -rf ./.build
+    rm Package.resolved
+    git checkout Package.swift
+    popd
+
+    if [ ${build_success} -eq 0 ]; then
+        echo "================= Building $example_project succeeded ================="
+    else
+        echo "================= Building $example_project failed ================="
+        exit_code=1
+    fi
+done
+
+exit "${exit_code}"

etc/release.sh

@@ -1,9 +1,12 @@
-# usage: ./release/release.sh [new version string]
-# for example: ./release/release.sh 1.0.0
+# usage: ./etc/release.sh [new version string]
+# for example: ./etc/release.sh 1.0.0
 
 # exit if any command fails
 set -e
 
+# verify that the examples build
+./etc/build-examples.sh
+
 # update version string for libmongoc handshake
 sourcery --sources Sources/MongoSwift --templates Sources/MongoSwift/MongoSwiftVersion.stencil --output Sources/MongoSwift/MongoSwiftVersion.swift --args versionString=${1}
 

etc/sed.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+case "$(uname -s)" in
+    Darwin)
+        sed=gsed
+        ;;
+    *)
+        sed=sed
+        ;;
+esac
+
+if ! hash ${sed} 2>/dev/null; then
+    echo "You need sed \"${sed}\" to run this script ..."
+    echo
+    echo "On macOS: brew install gnu-sed"
+    exit 43
+fi
+
+${sed} "$@"

etc/vendor-libmongoc.sh

@@ -28,21 +28,7 @@ if [[ ! "$WORK_DIR" || ! -d "$WORK_DIR" ]]; then
   exit 1
 fi
 
-case "$(uname -s)" in
-    Darwin)
-        sed=gsed
-        ;;
-    *)
-        sed=sed
-        ;;
-esac
-
-if ! hash ${sed} 2>/dev/null; then
-    echo "You need sed \"${sed}\" to run this script ..."
-    echo
-    echo "On macOS: brew install gnu-sed"
-    exit 43
-fi
+sed="$ETC_DIR/sed.sh"
 
 echo "REMOVING any previously vendored libmongoc code"
 rm -rf $CLIBMONGOC_INCLUDE_PATH