Swift Package Manager: define SQLite as a system library target

.travis.yml

@@ -183,8 +183,16 @@ jobs:
       gemfile: .ci/gemfiles/Gemfile.travis
       osx_image: xcode11
       env:
-        - TID=SPM
-      script: make test_install_SPM
+        - TID=SPM Package
+      script: make test_install_SPM_Package
+
+    # SPM Install
+    - stage: Test Installation Xcode 11
+      gemfile: .ci/gemfiles/Gemfile.travis
+      osx_image: xcode11
+      env:
+        - TID=SPM Package in Xcode Project
+      script: make test_install_SPM_Project
 
     ###########################################
     ## Test GRDB Xcode 10.3

Makefile

@@ -324,17 +324,27 @@ test_install_manual:
 	  clean build \
 	  $(XCPRETTY)
 
-test_install_SPM:
-	cd Tests/SPM && \
+test_install_SPM: test_install_SPM_Package test_install_SPM_Project
+
+test_install_SPM_Package:
+	cd Tests/SPM/PlainPackage && \
 	( if [ -a .build ] && [ -a Package.resolved ]; then $(SWIFT) package reset; fi ) && \
 	rm -rf Packages/GRDB && \
 	$(SWIFT) package edit GRDB --revision master && \
 	rm -rf Packages/GRDB && \
-	ln -s ../../.. Packages/GRDB && \
+	ln -s ../../../.. Packages/GRDB && \
 	$(SWIFT) build && \
 	./.build/debug/SPM && \
 	$(SWIFT) package unedit --force GRDB
 
+test_install_SPM_Project:
+	$(XCODEBUILD) \
+	  -project Tests/SPM/PlainProject/Plain.xcodeproj \
+	  -scheme Plain \
+	  -configuration Release \
+	  clean build \
+	  $(XCPRETTY)
+
 test_install_GRDB_CocoaPods: test_install_GRDB_CocoaPods_framework test_install_GRDB_CocoaPods_static
 
 test_install_GRDB_CocoaPods_framework:

Package.swift

@@ -9,10 +9,15 @@ let package = Package(
         .library(name: "GRDB", targets: ["GRDB"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/groue/CSQLite.git", from: "0.2.0"),
     ],
     targets: [
-        .target(name: "GRDB", path: "GRDB"),
+        .systemLibrary(
+            name: "sqlite3",
+            providers: [.apt(["libsqlite3-dev"])]),
+        .target(
+            name: "GRDB",
+            dependencies: ["sqlite3"],
+            path: "GRDB"),
         .testTarget(
             name: "GRDBTests",
             dependencies: ["GRDB"],
@@ -21,7 +26,7 @@ let package = Package(
                 "CocoaPods",
                 "Crash",
                 "Performance",
-                "SPM"
+                "SPM",
             ])
     ],
     swiftLanguageVersions: [.v4_2, .version("5")]

Sources/sqlite3/module.modulemap

@@ -0,0 +1,5 @@
+module CSQLite {
+    header "shim.h"
+    link "sqlite3"
+    export *
+}

Sources/sqlite3/shim.h

@@ -0,0 +1,9 @@
+#include <sqlite3.h>
+
+typedef void(*errorLogCallback)(void *pArg, int iErrCode, const char *zMsg);
+
+// Wrapper around sqlite3_config(SQLITE_CONFIG_LOG, ...) which is a variadic
+// function that can't be used from Swift.
+static inline void registerErrorLogCallback(errorLogCallback callback) {
+    sqlite3_config(SQLITE_CONFIG_LOG, callback, 0);
+}