refactor make and move main into own cmd package

.gitignore

@@ -4,7 +4,8 @@
 *.html
 *.gcode
 \#*#
-GoSlice
+goslice
+goslice.exe
 coverage.out
 !test_stl/*.stl
 .target

Makefile

@@ -2,18 +2,27 @@ VERSION := $(shell git describe --tags)
 BUILD := $(shell git rev-parse --short HEAD)
 PROJECTNAME := goslice
 TARGET := .target
+GOFILES := ./cmd/goslice
 
 # Use linker flags to provide version/build settings
 LDFLAGS=-ldflags "-X=main.Version=$(VERSION) -X=main.Build=$(BUILD)"
 
 ## build: Compile the binary.
-build:
-	@GOPATH=$(GOPATH) GOBIN=$(GOBIN) GOARM=$(GOARM) CGO_CPPFLAGS=$(CGO_CPPFLAGS) CGO_CFLAGS=$(CGO_CFLAGS) CGO_CXXFLAGS=$(CGO_CXXFLAGS) CGO_LDFLAGS=$(CGO_LDFLAGS) go build $(LDFLAGS) -o $(TARGET)/$(PROJECTNAME) $(GOFILES)
+build: clean
+	@mkdir -p $(TARGET)
+	@GOPATH=$(GOPATH) \
+	GOBIN=$(GOBIN) \
+	GOARM=$(GOARM) \
+	CGO_CPPFLAGS=$(CGO_CPPFLAGS) \
+	CGO_CFLAGS=$(CGO_CFLAGS) \
+	CGO_CXXFLAGS=$(CGO_CXXFLAGS) \
+	CGO_LDFLAGS=$(CGO_LDFLAGS) \
+	go build $(LDFLAGS) -o $(TARGET) $(GOFILES)
 
-## clear the build folder
-clear:
-	@rm -R .target
-	@rm .test_stl/*.gcode
+## clean the build folder
+clean:
+	@rm -Rf .target
+	@rm -f .test_stl/*.gcode
 
 test:
 	@go test ./...

README.md

@@ -42,13 +42,25 @@ If you need the usage of all possible flags, run it with the `--help` flag:
 ```
 
 ## Try it out - for developers
-Minimal usage:
+Just running GoSlice:
 ```
-go run . /path/to/stl/file.stl
+go run ./cmd/goslice /path/to/stl/file.stl
 ```
 To get help for all possible flags take a look at /data/option.go or just run:
 ```
-go run . --help
+go run ./cmd/goslice --help
+```
+
+Building GoSlice:
+Ideally you should have make installed:
+```
+make
+```
+The resulting binary will be in the `.target` folder.
+
+If you do not have make, you can still run the build command manually, but it is not recommended:
+```
+go build -ldflags "-X=main.Version=$(git describe --tags) -X=main.Build=$(git rev-parse --short HEAD)" -o .target ./cmd/goslice
 ```
 ## How does it work
 [see here](docs/README.md)

slicer_test.go → cmd/goslice/slicer_test.go

@@ -7,7 +7,7 @@ import (
 )
 
 const (
-	folder = "test_stl/"
+	folder = "../../test_stl/"
 
 	// The models are copied to the project just to avoid downloading them for each test.