coding-to-music
commented
3 years ago go build:
go build, compile and builds executable in current directory. It means, it will create an executable in current directory. Now If we want to run the program again, we do not have to compile it again, we simply run the executable file. Thus, it helps to reduce the compilation time. It means it helps to compile a program once and use the executable file anytime.
sus@sus:~/src/mygo$ pwd
/home/sus/src/mygo
sus@sus:~/src/mygo$ ls
test.go
sus@sus:~/src/mygo$ cat test.go
package main
import “fmt”
func main() {
fmt.Println(“Hello World!!”)
}
sus@sus:~/src/mygo$ go build //====> Line-X
sus@sus:~/src/mygo$ ls
mygo test.go
sus@sus:~/src/mygo$ ./mygo
Hello World!!
sus@sus:~/src/mygo$ rm mygo
sus@sus:~/src/mygo$ go build test.go //====> Line-Y
sus@sus:~/src/mygo$ ls
test test.go
sus@sus:~/src/mygo$ ./test
Hello World!!
sus@sus:~/src/mygo$One more thing to notice, as in Line-X, if we just run “go build” without any source file name, then the executable will be build according to the current directory name(Here it is “mygo”). Else as in Line-Y, executable will be named according to source file-name (Here it is “test”).
go run vs go build vs go install [3 best Tricks]
https://www.oldbloggers.com/go-run-vs-go-build-vs-go-install/
go run
Go run vs go build vs go install, why so many ways to compile a go program. We will see the differences one by one. To quickly test your go code and to check the output, you can use go run. But internally it compiles your code and builds an executable binary in a temporary location, launches that temp exe-file and finally cleans it when your app exits. It looks very similar to how we run a script, like shell-script or a python code. Also try “go help”, “go help build”, “go help run” and “go help install” on your terminal for more details.