Add Makefile targets for build and copy to VM agent

Signed-off-by: Darko Draskovic <darko.draskovic@gmail.com>

.gitignore

@@ -0,0 +1 @@
+build

Makefile

@@ -1,5 +1,42 @@
-docker_mfxkit:
-	docker build --no-cache --tag=mainflux/mfxkit -f docker/Dockerfile .
+BUILD_DIR = build
+SERVICES = agent
+CGO_ENABLED ?= 0
+GOARCH ?= amd64
+VERSION ?= $(shell git describe --abbrev=0 --tags)
+COMMIT ?= $(shell git rev-parse HEAD)
+TIME ?= $(shell date +%F_%T)
 
-run:
-	docker-compose -f docker/docker-compose.yml up
+define compile_service
+	CGO_ENABLED=$(CGO_ENABLED) GOOS=$(GOOS) GOARCH=$(GOARCH) GOARM=$(GOARM) \
+	go build -mod=vendor -ldflags "-s -w \
+	-X 'github.com/ultravioletrs/cocos/internal/http.BuildTime=$(TIME)' \
+	-X 'github.com/ultravioletrs/cocos/internal/http.Version=$(VERSION)' \
+	-X 'github.com/ultravioletrs/cocos/internal/http.Commit=$(COMMIT)'" \
+	-o ${BUILD_DIR}/cocos-$(1) cmd/$(1)/main.go
+endef
+
+all: $(SERVICES)
+
+$(SERVICES):
+	$(call compile_service,$(@))
+
+
+QCOW2_PATH = ~/go/src/github.com/ultravioletrs/manager/cmd/manager/img/boot.img
+HOST_AGENT_PATH = ~/ultravioletrs/agent/build/cocos-agent
+GUEST_AGENT_PATH = /root/agent
+HOST_AGENT_SH_PATH = ~/go/src/github.com/ultravioletrs/agent/alpine/agent.sh
+GUEST_AGENT_SH_PATH = /root/agent/
+
+# Copy the agent binary to the guest VM
+copy-agent:
+	sudo virt-copy-in -a $(QCOW2_PATH) $(HOST_AGENT_PATH) $(GUEST_AGENT_PATH)
+
+# Copy the agent init sh script to the guest VM
+copy-agent-sh:
+	sudo virt-copy-in -a $(QCOW2_PATH) $(HOST_AGENT_SH_PATH) $(GUEST_AGENT_SH_PATH)
+
+# docker_mfxkit:
+# 	docker build --no-cache --tag=mainflux/mfxkit -f docker/Dockerfile .
+
+# run:
+# 	docker-compose -f docker/docker-compose.yml up

README.md

@@ -46,3 +46,21 @@ To see the change in action, run
 ```
 curl -i -X POST -H "Content-Type: application/json" localhost:9022/mfxkit -d '{"secret":"secret2"}'
 ```
+
+## Alpine linux
+
+To schedula a task _via_ `cron`
+
+```sh
+crontab -e
+```
+
+and enter this line in order to execute `agent.sh` script every minute (that's `cron`'s minimal repeating delay of execution):
+```
+*   *   *   *   *   sh /root/agent/agent.sh
+```
+
+To check whether the program is executing, run
+```sh
+cat /var/log/messages
+```

alpine/agent.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+AGENT_NAME="cocos-agent"
+AGENT_PATH="$HOME/agent/$AGENT_NAME"
+
+# find the process IDs of running processes based on their name
+if pgrep -x "$AGENT_NAME" >/dev/null; then
+    echo "Executable $AGENT_NAME is already running."
+else
+    if [ -x "$AGENT_PATH" ]; then
+        echo "Executing $AGENT_NAME..."
+        "$AGENT_PATH"
+    else
+        echo "Executable $AGENT_NAME not found at path $AGENT_PATH."
+    fi
+fi