Independent build

.github/workflows/compile-docker.yml

@@ -0,0 +1,52 @@
+name: Compile Docker Images
+
+on: [push]
+
+jobs:
+  main:
+    runs-on: ubuntu-20.04
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            nebraltd/lora_gateway
+            ghcr.io/${{ github.repository }}
+          flavor: |
+            latest=true
+          tags: |
+            type=sha,prefix=
+            type=sha,format=long,prefix=
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}

Dockerfile

@@ -0,0 +1,21 @@
+# Builds libloragw for each SPI bus and copies each to
+# $OUTPUT_DIR/$SPI_BUS respectively. Also copies reset_lgw.sh
+# to $OUTPUT_DIR.
+
+FROM balenalib/raspberry-pi-debian:buster-build as lora-gateway-sx1301-builder
+
+ENV ROOT_DIR=/opt
+
+# Output built files to this location
+ENV OUTPUT_DIR="$ROOT_DIR/output"
+
+# Used in libloragw/Makefile value and supplied to loragw_spi.native.c
+ENV SPI_SPEED=2000000
+
+WORKDIR "$ROOT_DIR"
+
+# Copy upstream source into expected location
+COPY . "$ROOT_DIR"
+
+# Compile libloragw
+RUN . "$ROOT_DIR/compile_libloragw.sh"

compile_libloragw.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env sh
+
+compile_libloragw_for_spi_bus() {
+    spi_bus="$1"
+    echo "Compiling upstream libloragw for sx1301 on $spi_bus"
+
+    cd "$ROOT_DIR/libloragw" || exit
+    export SPI_DEV_DIR="/dev/$spi_bus"
+    make clean
+    make -j 4
+
+    cd "$ROOT_DIR"
+    cp -r "$ROOT_DIR/libloragw/" "$OUTPUT_DIR/$spi_bus"
+
+    echo "Finished building libloragw for sx1301 on $spi_bus in $OUTPUT_DIR"
+}
+
+compile_libloragw() {
+    echo "Compiling libloragw for sx1301 concentrator on all the necessary SPI buses in $OUTPUT_DIR"
+
+    # Built outputs will be copied to this directory
+    mkdir -p "$OUTPUT_DIR"
+
+    # In order to be more portable, intentionally not interating over an array
+    compile_libloragw_for_spi_bus spidev0.0
+    compile_libloragw_for_spi_bus spidev0.1
+    compile_libloragw_for_spi_bus spidev1.0
+    compile_libloragw_for_spi_bus spidev1.1
+    compile_libloragw_for_spi_bus spidev1.2
+    compile_libloragw_for_spi_bus spidev2.0
+    compile_libloragw_for_spi_bus spidev2.1
+    compile_libloragw_for_spi_bus spidev32766.0
+}
+
+compile_libloragw

libloragw/Makefile

@@ -10,7 +10,8 @@ CROSS_COMPILE ?=
 CC := $(CROSS_COMPILE)gcc
 AR := $(CROSS_COMPILE)ar
 
-CFLAGS := -O2 -Wall -Wextra -std=c99 -Iinc -I.
+# Modified to include SPI_DEV_PATH and SPI_SPEED macros
+CFLAGS := -O2 -Wall -Wextra -std=c99 -Iinc -I. -D'SPI_DEV_PATH="${SPI_DEV_DIR}"' -D'SPI_SPEED=${SPI_SPEED}'
 
 OBJDIR = obj
 INCLUDES = $(wildcard inc/*.h)

libloragw/src/loragw_spi.native.c

@@ -53,8 +53,9 @@ Maintainer: Sylvain Miermont
 
 #define READ_ACCESS     0x00
 #define WRITE_ACCESS    0x80
-#define SPI_SPEED       2000000
-#define SPI_DEV_PATH    "/dev/spidev0.0"
+// SPI_SPEED and SPI_DEV_PATH are intended to be defined as part of CFLAGS in the Makefile
+// #define SPI_SPEED       8000000
+// #define SPI_DEV_PATH    "/dev/spidev0.0"
 //#define SPI_DEV_PATH    "/dev/spidev32766.0"
 
 /* -------------------------------------------------------------------------- */