add Makefile (#3)

Co-authored-by: m.bordyugov <m.bordyugov@corp.vk.com>

Author: DedAzaMarks

Makefile

@@ -0,0 +1,34 @@
+BUILD_VERSION    := $(if $(BUILD_VERSION),$(BUILD_VERSION),$(shell git describe --tags --always --dirty))
+BUILD_COMMIT     := $(if $(BUILD_COMMIT),$(BUILD_COMMIT),$(shell git log --format="%H" -n 1))
+BUILD_COMMIT_TS  := $(if $(BUILD_COMMIT_TS),$(BUILD_COMMIT_TS),$(shell git log --format="%ct" -n 1))
+BUILD_BRANCH     := $(if $(BUILD_BRANCH),$(BUILD_BRANCH),$(shell git rev-parse --abbrev-ref HEAD))
+BUILD_TIME       := $(if $(BUILD_TIME),$(BUILD_TIME),$(shell date +%FT%T%z))
+BUILD_MACHINE    := $(if $(BUILD_MACHINE),$(BUILD_MACHINE),$(shell uname -n -m -r -s))
+BUILD_GO_VERSION := $(if $(BUILD_GO_VERSION),$(BUILD_GO_VERSION),$(shell go version | cut -d' ' -f3))
+
+COMMON_BUILD_VARS := \
+  -X 'github.com/vkcom/tl/internal/build.buildTimestamp=$(BUILD_TIME)' \
+  -X 'github.com/vkcom/tl/internal/build.machine=$(BUILD_MACHINE)' \
+  -X 'github.com/vkcom/tl/internal/build.commit=$(BUILD_COMMIT)' \
+  -X 'github.com/vkcom/tl/internal/build.version=$(BUILD_VERSION)' \
+  -X 'github.com/vkcom/tl/internal/build.commitTimestamp=$(BUILD_COMMIT_TS)' \
+  -X 'github.com/vkcom/tl/internal/build.branchName=$(BUILD_BRANCH)' \
+
+COMMON_LDFLAGS = $(COMMON_BUILD_VARS) -extldflags '-O2'
+
+GO = go
+
+SHA256_CHECKSUM := $(shell go run ./cmd/sha256sum ./internal)
+ifndef SHA256_CHECKSUM
+$(error SHA256_CHECKSUM failed to set, problem with go run cmd/sha256sum internal)
+endif
+
+.PHONY: build
+
+all: build
+
+build:
+	@echo "Building tlgen with sha256 checksum $(SHA256_CHECKSUM)"
+	@$(GO) build -ldflags "$(COMMON_LDFLAGS)  -X 'github.com/vkcom/tl/internal/tlcodegen.buildSHA256Checksum=$(SHA256_CHECKSUM)'" ./cmd/tlgen
+
+