How Do I Find the Path of My Go Executable?

How to Locate Executable File Path in Go

Within Go, it's often desirable to ascertain the path to the currently running executable, particularly when executing it indirectly through relative paths or via the PATH environment variable. By leveraging Go's robust APIs, it's straightforward to retrieve this information.

One method for determining the executable path involves utilizing the os.Args slice, which contains an array of command-line arguments. The first element of this slice, os.Args[0], typically holds the name of the executable.

However, certain scenarios may arise where os.Args[0] doesn't fully depict the executable's actual path. To overcome this, Go 1.8 and later versions offer the os.Executable function, which directly returns the absolute path to the executable, irrespective of how it was invoked.

Here's an example demonstrating the use of os.Executable():

import (
    "os"
    "path"
    "log"
)

func main() {
    ex, err := os.Executable()
    if err != nil {
        log.Fatal(err)
    }
    dir := path.Dir(ex)
    log.Print(dir)
}

Executing this code will output the directory containing the executable. This technique eliminates the need to manually construct or guess the executable's path, providing a reliable way to locate it in any execution environment.

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