如何从os.execute从代码运行二进制文件

Question

I'm trying to build binary with code and run the command against the bin (the bin is CLI) Via code,

mytest.go file

cmd := exec.Command("go", "build",  "-o", "./integration/testdata/fzr”,)
cmd.Dir = “./testdata"
err := cmd.Run()

now after the code run, I was able to see the bin under testdata folder And now I’m want to run a command like fzr —help

Like following

cmdOut := exec.Command(“fzr”, “—help”)
cmdOut.Dir = "./testdata/"
err := cmdOut.Run()

I got error

lookPathErr: {
    Name: “fzr”,
    Err: {
        s: "executable file not found in $PATH",
    },
}

Now If I take the fzr bin and put it in go/src/bin I was able to run fzr —help from the terminal

The project structure is like following

myGithubProject/
  |---- integration
   |---- -testdata
    |---- -fzr
   |---- -mytest.go

mytest is in the same level with the testadata and the fzr bin is under test data

What could be the problem ?

I try also to provide the full path to the bin with os.Getwd() which doesnt help ...

Answer 1

Applications accessing the shell, do often not execute the shell initialization/configuration. For example the cron an clearly also go do not execute the shell initialization.

To make your program work add the absolute path to the executable, or alternative the relative path from the location where your application is started from:

exec.Command(“./integration/testdata/fzr”, “—help”)

(Assuming that the path displayed is your actual path).