Merge branch 'makefile' into develop

.cargo/config

@@ -0,0 +1,3 @@
+# vim: ft=toml
+[build]
+target-dir = "out/target"

.gitignore

@@ -2,7 +2,7 @@
 # Generated by Cargo
 # will have compiled files and executables
 debug/
-target/
+out/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html

Makefile

@@ -0,0 +1,100 @@
+# =====CONFIGURATION=====
+# Version of postgresql to compile libpq from
+PQ_VER  ?= 11.12
+# OpenSSL version
+SSL_VER ?= 1.1.1k
+# Dumb-init version
+DI_VER  ?= 1.2.5
+
+
+# =====AUTO-GENERATED VARIABLES=====
+# This is such a lovely oneliner
+# NOTE: $(dir PATH) outputs a trailing slash
+OUT_DIR     ?= $(dir $(abspath $(lastword $(MAKEFILE_LIST))))out
+
+PREFIX      := $(OUT_DIR)/prefix
+OPENSSL_DIR := $(OUT_DIR)/openssl-$(SSL_VER)
+PQ_DIR      := $(OUT_DIR)/postgresql-$(PQ_VER)
+DI_DIR      := $(OUT_DIR)/dumb-init-$(DI_VER)
+
+# Used in various make calls to specify parallel recipes
+CORES       != nproc
+
+
+# =====ENVIRONMENT VARIABLES=====
+export CC=musl-gcc -fPIC -pie -static
+export LD_LIBRARY_PATH=$(PREFIX)
+export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
+
+
+# TODO check for header files (openssl-dev, libpq-dev) both for Arch & Ubuntu
+
+# Create the out dir
+$(shell mkdir -p "$(PREFIX)")
+
+
+# ====RECIPES====
+.PHONY: all
+all: build
+
+# libpq builds openssl as a dependency
+.PHONY: build
+build: libpq
+
+.PHONY: clean
+clean:
+	@ echo "Note: this only cleans the C dependencies, not the Cargo cache."
+	rm -rf "$(PQ_DIR)" "$(OPENSSL_DIR)" "$(DI_DIR)" "$(PREFIX)"
+
+
+# =====OPENSSL=====
+# Download the source code & configure the project
+$(OPENSSL_DIR)/Configure:
+	curl -sSL "https://www.openssl.org/source/openssl-$(SSL_VER).tar.gz" | \
+		tar -C "$(OUT_DIR)" -xz
+	cd "$(OPENSSL_DIR)" && \
+		CC="$$CC -idirafter /usr/include" ./Configure \
+			no-zlib \
+			no-shared \
+			--prefix="$(PREFIX)" \
+			--openssldir="$(PREFIX)/ssl" \
+			linux-x86_64
+
+# Build OpenSSL
+.PHONY: openssl
+openssl: $(OPENSSL_DIR)/Configure
+	C_INCLUDE_PATH="$(PREFIX)/include" $(MAKE) -C "$(OPENSSL_DIR)" depend
+	$(MAKE) -C "$(OPENSSL_DIR)" -j$(CORES)
+	$(MAKE) -C "$(OPENSSL_DIR)" install_sw
+
+
+# =====LIBPQ=====
+# Download the source code & configure the project
+$(PQ_DIR)/configure:
+	curl -sSL "https://ftp.postgresql.org/pub/source/v$(PQ_VER)/postgresql-$(PQ_VER).tar.gz" | \
+		tar -C "$(OUT_DIR)" -xz
+	cd "$(PQ_DIR)" && \
+		LDFLAGS="-L$(PREFIX)/lib" CFLAGS="-I$(PREFIX)/include" ./configure \
+			--without-readline \
+			--with-openssl \
+			--without-zlib \
+			--prefix="$(PREFIX)" \
+			--host=x86_64-unknown-linux-musl
+
+.PHONY: libpq
+libpq: openssl $(PQ_DIR)/configure
+	make -C "$(PQ_DIR)/src/interfaces/libpq" -j$(CORES) all-static-lib
+	make -C "$(PQ_DIR)/src/interfaces/libpq" install install-lib-static
+	make -C "$(PQ_DIR)/src/bin/pg_config" -j $(CORES)
+	make -C "$(PQ_DIR)/src/bin/pg_config" install
+
+
+# =====DUMB-INIT=====
+# NOTE: this is only used inside the Docker image, but it's here for completeness.
+$(DI_DIR)/Makefile:
+	curl -sSL "https://github.com/Yelp/dumb-init/archive/refs/tags/v$(DI_VER).tar.gz" | \
+		tar -C "$(OUT_DIR)" -xz
+
+.PHONY: dumb-init
+dumb-init: $(DI_DIR)/Makefile
+	make -C "$(DI_DIR)" build