code to determine the go src directory

goSrcFind.go

@@ -0,0 +1,85 @@
+package fhelp
+
+// returns whatever your golang source dir is
+// If there is a go.work file in your parent, that directory will be returned
+// otherwise, return ~/go/src
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"go.wit.com/log"
+)
+
+// look for a go.work file
+// otherwise use ~/go/src
+func findGoSrc() (string, error) {
+	pwd, err := os.Getwd()
+	// startpwd, _ := os.Getwd()
+	if err == nil {
+		// Check for go.work in the current directory and then move up until root
+		if pwd, err := digup(pwd); err == nil {
+			// found an existing go.work file
+			// os.Chdir(pwd)
+			return pwd, nil
+		} else {
+			// if there is an error looking for the go.work file
+			// default to using ~/go/src
+			// log.Info("forge.digup() err", pwd, err)
+		}
+	} else {
+		// this shouldn't really happen. maybe your working directory got deleted
+		log.Info("forge.findGoSrc() os.Getwd() was probably deleted", pwd, err)
+	}
+
+	// there are no go.work files, resume the ~/go/src behavior from prior to golang 1.22
+	pwd, err = useGoSrc()
+	return pwd, err
+}
+
+// this is the 'old way" and works fine for me. I use it because I like the ~/go/src directory
+// because I know exactly what is in it: GO stuff & nothing else
+func useGoSrc() (string, error) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	pwd := filepath.Join(homeDir, "go/src")
+	err = os.MkdirAll(pwd, os.ModePerm)
+	return pwd, err
+}
+
+func goWorkExists(dir string) bool {
+	var err error
+	workFilePath := filepath.Join(dir, "go.work")
+	if _, err = os.Stat(workFilePath); err == nil {
+		// log.Info("f.goWorkExists() found", workFilePath)
+		return true
+	} else if !os.IsNotExist(err) {
+		// log.Info("f.goWorkExists() missing", workFilePath)
+		return false
+	}
+	// probably false, but some other error
+	// log.Info("f.goWorkExists() os.Stat() error", err, workFilePath)
+	return false
+}
+
+func digup(path string) (string, error) {
+	for {
+		workFilePath := filepath.Join(path, "go.work")
+		if _, err := os.Stat(workFilePath); err == nil {
+			return path, nil // Found the go.work file
+		} else if !os.IsNotExist(err) {
+			return "", err // An error other than not existing
+		}
+
+		parentPath := filepath.Dir(path)
+		if parentPath == path {
+			break // Reached the filesystem root
+		}
+		path = parentPath
+	}
+
+	return "", fmt.Errorf("no go.work file found")
+}

goWork.go

@@ -0,0 +1,34 @@
+package fhelp
+
+import (
+	"os"
+
+	"go.wit.com/log"
+)
+
+/*
+try to determine the GO working dir
+this will look for a go.work file, otherwise
+it will default to ~/go/src
+
+returns:
+string	# ~/go/src or the path to the go.work file
+bool	# true if the user is using a go.work file
+err	# if everything goes wrong, the error
+*/
+func DetermineGoPath() (string, bool, error) {
+	gosrc := os.Getenv("FORGE_GOSRC")
+	if gosrc != "" {
+		hasWork := goWorkExists(gosrc)
+		log.Info("Using ENV{FORGE_GOSRC} =", gosrc)
+		return gosrc, hasWork, nil
+	}
+
+	gosrc, err := findGoSrc()
+	if err != nil {
+		log.Info("fhelp.DetermineGoPath()", err)
+	}
+	hasWork := goWorkExists(gosrc)
+
+	return gosrc, hasWork, err
+}