Makefile/swift: update Makefile and add support for iOS

updates tailscale/tailscale#13937

Adds a Makefile for building various targets.  Adds support for building
iOS compatible libtailscale_ios.a.   Removes SOCKS5 support for iOS where
it looks like the CFNetwork support is lacking.

Author: barnstar

.gitignore

@@ -2,6 +2,8 @@ libtailscale.so
 libtailscale.a
 libtailscale.h
 libtailscale.tar*
+libtailscale_ios.a
+libtailscale_ios.h
 
 /tstestcontrol/libtstestcontrol.a
 /tstestcontrol/libtstestcontrol.h

Makefile

@@ -0,0 +1,34 @@
+# Copyright (c) Tailscale Inc & AUTHORS
+# SPDX-License-Identifier: BSD-3-Clause
+
+
+libtailscale.a: 
+	go build -buildmode=c-archive 
+
+libtailscale_ios.a:
+	GOOS=ios GOARCH=arm64 CGO_ENABLED=1 CC=$(PWD)/swift/script/clangwrap.sh /usr/local/go/bin/go build -v -ldflags -w -tags ios -o libtailscale_ios.a -buildmode=c-archive
+
+.PHONY: c-archive-ios
+c-archive-ios: libtailscale_ios.a  ## Builds libtailscale_ios.a for iOS (iOS SDK required)
+
+.PHONY: c-archive 
+c-archive: libtailscale.a  ## Builds libtailscale.a for the target platform
+
+.PHONY: shared
+shared: ## Builds libtailscale.so for the target platform
+	go build -v -buildmode=c-shared
+
+.PHONY: clean
+clean: ## Clean up build artifacts
+	rm -f libtailscale.a
+	rm -f libtailscale_ios.a
+	rm -f libtailscale.h
+	rm -f libtailscale_ios.h
+
+.PHONY: help
+help: ## Show this help
+	@echo "\nSpecify a command. The choices are:\n"
+	@grep -hE '^[0-9a-zA-Z_-]+:.*?## .*$$' ${MAKEFILE_LIST} | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[0;36m%-12s\033[m %s\n", $$1, $$2}'
+	@echo ""
+
+.DEFAULT_GOAL := help

README.md

@@ -13,6 +13,12 @@ With the latest version of Go, run:
 go build -buildmode=c-archive
 ```
 
+or 
+
+```
+make archive
+```
+
 This will produce a `libtailscale.a` file. Link it into your binary,
 and use the `tailscale.h` header to reference it.
 
@@ -22,6 +28,12 @@ It is also possible to build a shared library using
 go build -buildmode=c-shared
 ```
 
+or
+
+```
+make shared
+```
+
 ## Bugs
 
 Please file any issues about this code or the hosted service on

swift/Makefile

@@ -7,14 +7,44 @@ ifeq (, $(shell which $(XCPRETTIFIER)))
         XCPRETTIFIER := cat
 endif
 
-OUTPUT_DIR=build
+# The xcodebuild schemes will run the Makefile in the root directory to build
+# the libtailscale.a and libtailscale_ios.a dependencies.
 
-build:
-	mkdir -p $(OUTPUT_DIR)
-	xcodebuild build -scheme TailscaleKit -derivedDataPath $(OUTPUT_DIR) -configuration Release -destination 'generic/platform=macOS,arch=arm64' -destination 'generic/platform=iOS' | $(XCPRETTIFIER)
+.PHONY: macos
+macos:  ## Builds TailscaleKit for macos to swift/build/Build/Products/Release
+	cd .. && make c-archive
+	mkdir -p build && \
+	xcodebuild build -scheme "TailscaleKit (macOS)" \
+	 -derivedDataPath build \
+	 -configuration Release \
+	 -destination 'platform=macOS,arch=arm64' | $(XCPRETTIFIER)
 
-test:
-	xcodebuild test -scheme TailscaleKitXCTests -derivedDataPath $(OUTPUT_DIR) -configuration Debug | $(XCPRETTIFIER)
+.PHONY: ios
+ios:  ## Builds TailscaleKit for iOS to swift/build/Build/Products/Release
+	cd .. && make c-archive-ios
+	mkdir -p build && \
+	xcodebuild build -scheme "TailscaleKit (iOS)" \
+	 -derivedDataPath build \
+	 -configuration Release \
+	 -destination 'generic/platform=iOS' | $(XCPRETTIFIER)
 
-clean:
-	rm -rf $(OUTPUT_DIR)
+.PHONY: test
+test: ## Run tests (macOS)
+	cd .. && make c-archive
+	xcodebuild test -scheme TailscaleKitXCTests \
+	 -derivedDataPath build \
+	 -configuration Debug \
+	 -destination 'platform=macOS,arch=arm64' | $(XCPRETTIFIER)
+
+.PHONY: clean
+clean: ## Clean up build artifacts (including the libtailscale dependencies)
+	cd .. && make clean
+	rm -rf build 
+
+.PHONY: help
+help: ## Show this help
+	@echo "\nSpecify a command. The choices are:\n"
+	@grep -hE '^[0-9a-zA-Z_-]+:.*?## .*$$' ${MAKEFILE_LIST} | awk 'BEGIN {FS = ":.*?## "}; {printf "  \033[0;36m%-12s\033[m %s\n", $$1, $$2}'
+	@echo ""
+
+.DEFAULT_GOAL := help

swift/README.md

@@ -14,17 +14,30 @@ Build Requirements:
 
 Building Tailscale.framework:
 
+First build the libtailscale dependecies:
+
+
+
 From /swift 
 ```
-$ make build
+$ make macos
+# make ios
 ```
 
 Will build TailscaleKit.framework into /swift/build/Build/Products.
 
 Separate frameworks will be built for macOS and iOS.  All dependencies (libtailscale.a)
 are built automatically.  Swift 6 is supported.
 
-Alternatively, you may build from xCode using the Tailscale scheme.
+Alternatively, you may build from xCode using the Tailscale scheme but the 
+libraries must be built first (since xCode will complain about paths and
+permissions)
+
+From / 
+```
+$ make c-archive
+$ make c-archive-ios 
+```
 
 Non-apple builds are not supported (yet).  We do use URLSession and Combine though
 it is possible to purge both.