first attempt that seems to kinda work on New()

.gitignore

@@ -2,4 +2,4 @@ go.*
 
 *.pb.go
 
-example/example
+scanGoSrc/scanGoSrc

Makefile

@@ -6,6 +6,7 @@
 
 
 all: refs.pb.go godep.pb.go repo.pb.go vet
+	make -C scanGoSrc/
 
 vet: lint
 	GO111MODULE=off go vet

godep.redoGoMod.go

@@ -0,0 +1,117 @@
+package gitpb
+
+// does processing on the go.mod and go.sum files
+
+import (
+	"bufio"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"go.wit.com/log"
+)
+
+// poor name perhaps. It's because in most of these
+// repos you can also type "make redomod" to do the same thing
+// since it's a Makefile task that is also useful to be able to run
+// from the command line
+func (repo *Repo) MakeRedomod() (bool, error) {
+	// unset the go development ENV var to generate release files
+	os.Unsetenv("GO111MODULE")
+	if ok, err := repo.strictRun([]string{"rm", "-f", "go.mod", "go.sum"}); !ok {
+		log.Warn("rm go.mod go.sum failed", err)
+		return ok, err
+	}
+	if ok, err := repo.strictRun([]string{"go", "mod", "init", repo.GoPath}); !ok {
+		log.Warn("go mod init failed", err)
+		return ok, err
+	}
+	if ok, err := repo.strictRun([]string{"go", "mod", "tidy"}); !ok {
+		log.Warn("go mod tidy failed", err)
+		return ok, err
+	}
+	log.Info("MakeRedomod() worked", repo.GoPath)
+
+	if repo.Exists("go.sum") {
+		// return the attempt to parse go.mod & go.sum
+		return repo.parseGoSum()
+	}
+	repo.GoDeps = nil
+	repo.GoPrimitive = false
+
+	ok, err := repo.isPrimativeGoMod()
+	if err != nil {
+		// this means this repo does not depend on any other package
+		log.Info("PRIMATIVE repo error:", repo.GoPath, "err =", err)
+		return false, err
+	}
+	if ok {
+		// this means the repo is primitive so there is no go.sum
+		repo.GoPrimitive = true
+		return true, nil
+	}
+	// this should never happen
+	return false, errors.New("MakeRedomod() logic failed")
+}
+
+// reads and parses the go.sum file
+func (repo *Repo) parseGoSum() (bool, error) {
+	// empty out what was there before
+	repo.GoDeps = nil
+	tmp := filepath.Join(repo.FullPath, "go.sum")
+	gosum, err := os.Open(tmp)
+	if err != nil {
+		log.Warn("missing go.sum", repo.FullPath)
+		return false, err
+	}
+	defer gosum.Close()
+
+	scanner := bufio.NewScanner(gosum)
+	log.Info("gosum:", tmp)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		parts := strings.Split(line, " ")
+		if len(parts) == 3 {
+			godep := strings.TrimSpace(parts[0])
+			version := strings.TrimSpace(parts[1])
+			if strings.HasSuffix(version, "/go.mod") {
+				version = strings.TrimSuffix(version, "/go.mod")
+			}
+			new1 := GoDep{
+				GoPath:  godep,
+				Version: version,
+			}
+			repo.AppendGoDep(&new1)
+			/*
+				found := repo.FindGoDepByPath(godep)
+				if found == nil {
+				currentversion, ok := deps[godep]
+				if ok {
+					// only use the first value found in the file?
+					// this shouldn't have been possible. this function should
+					// only be called from MakeRedomod()
+					// todo: make go things a seperate package so this function
+					// isn't exported?
+					if version != currentversion {
+						log.Warn("\tgo.sum ", godep, "had both", version, currentversion)
+					}
+				} else {
+					deps[godep] = version
+					log.Info("\t", godep, "=", version)
+				}
+			*/
+		} else {
+			// I've never seen this happen yet
+			panic(errors.New("go.sum invalid: " + line))
+			// return false, errors.New("go.sum invalid: " + line)
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		repo.GoDeps = nil
+		return false, err
+	}
+	return true, nil
+}

log.go

@@ -0,0 +1,16 @@
+package gitpb
+
+import (
+	"go.wit.com/log"
+)
+
+var GITPB *log.LogFlag
+var GITPBWARN *log.LogFlag
+
+func init() {
+	full := "go.wit.com/lib/protobuf/gitpb"
+	short := "gitpb"
+
+	GITPB = log.NewFlag("GITPB", false, full, short, "general gitpb things")
+	GITPBWARN = log.NewFlag("GITPBWARN", true, full, short, "gitpb warnings")
+}

repo.new.go

@@ -1,7 +1,13 @@
 package gitpb
 
 import (
+	"bufio"
+	"errors"
+	"os"
 	"path/filepath"
+	"strings"
+
+	"go.wit.com/log"
 )
 
 // scans in a new git repo. If it detects the repo is a golang project,
@@ -9,11 +15,19 @@ import (
 // TODO: try adding python, rails, perl, rust, other language things?
 // I probably will never have time to try that, but I'd take patches for anyone
 // that might see this note and feel so inclined.
-func (all *Repos) NewGoPath(basepath string, gopath string) *Repo {
+func (all *Repos) NewGoPath(basepath string, gopath string) (*Repo, error) {
 	if r := all.FindByGoPath(gopath); r != nil {
 		// already had this gopath
-		return r
+		return r, nil
 	}
+
+	// if .git doesn't exist, error out here
+	gitpath := filepath.Join(basepath, gopath, ".git")
+	_, err := os.Stat(gitpath)
+	if err != nil {
+		return nil, err
+	}
+
 	// add a new one here
 	newr := Repo{
 		FullPath: filepath.Join(basepath, gopath),
@@ -22,5 +36,39 @@ func (all *Repos) NewGoPath(basepath string, gopath string) *Repo {
 	newr.UpdateGit()
 
 	all.add(&newr)
-	return &newr
+	return &newr, nil
+}
+
+// Detect a 'Primative' package. Sets the isPrimative flag
+// will return true if the repo is truly not dependent on _anything_ else
+// like spew or lib/widget
+// it assumes go mod ran init and tidy ran without error
+func (repo *Repo) isPrimativeGoMod() (bool, error) {
+	// go mod init & go mod tidy ran without errors
+	log.Log(GITPB, "isPrimativeGoMod()", repo.FullPath)
+	tmp := filepath.Join(repo.FullPath, "go.mod")
+	gomod, err := os.Open(tmp)
+	if err != nil {
+		log.Log(GITPB, "missing go.mod", repo.FullPath)
+		repo.GoDeps = nil
+		return false, err
+	}
+	defer gomod.Close()
+
+	scanner := bufio.NewScanner(gomod)
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+
+		parts := strings.Split(line, " ")
+		log.Log(GITPB, "  gomod:", parts)
+		if len(parts) >= 1 {
+			log.Log(GITPB, "  gomod: part[0] =", parts[0])
+			if parts[0] == "require" {
+				log.Log(GITPB, "  should return false here")
+				return false, errors.New("go.mod file is not primative")
+			}
+
+		}
+	}
+	return true, nil
 }

repo.proto

@@ -11,12 +11,15 @@ import "google/protobuf/timestamp.proto"; // Import the well-known type for Time
 
 message Repo {
 	string fullPath		= 1;	// the actual path to the .git directory: '/home/devel/golang.org/x/tools'
-	string goPath		= 2;	// the logical path as used by golang: 'go.wit.com/apps/helloworld'
-	bool library 		= 3;	// if this is a golang library
-	repeated Ref refs 	= 4;
-	repeated GoDep GoDeps 	= 5;
-	google.protobuf.Timestamp lastPull		= 6;	// last time a git pull was done
+	repeated Ref refs 	= 2;
+	google.protobuf.Timestamp lastPull		= 3;	// last time a git pull was done
+
+	// things specific to golang projects
+	string goPath		= 4;	// the logical path as used by golang: 'go.wit.com/apps/helloworld'
+	repeated GoDep GoDeps 	= 6;
 	google.protobuf.Timestamp lastGoDep		= 7;	// last time go.sum was processed
+	bool goLibrary 		= 8;	// if this is a golang library
+	bool goPrimitive 	= 9;	// if this is a golang primitive
 }
 
 message Repos {

scanGoSrc/Makefile

@@ -0,0 +1,23 @@
+VERSION = $(shell git describe --tags)
+BUILDTIME = $(shell date +%Y.%m.%d)
+
+build:
+	GO111MODULE=off go build \
+		-ldflags "-X main.VERSION=${VERSION} -X main.BUILDTIME=${BUILDTIME} -X gui.GUIVERSION=${VERSION}"
+	FORGE_HOME=/tmp/forge ./scanGoSrc
+
+install:
+	GO111MODULE=off go install \
+		-ldflags "-X main.VERSION=${VERSION} -X main.BUILDTIME=${BUILDTIME} -X gui.GUIVERSION=${VERSION}"
+
+goimports:
+	goimports -w *.go
+
+prep:
+	go get -v -t -u
+
+run:
+	go run *.go
+
+clean:
+	-rm -f scanGoSrc

scanGoSrc/argv.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"os"
+
+	"github.com/alexflint/go-arg"
+)
+
+var argv args
+
+type args struct {
+	ConfigDir   string `arg:"env:FORGE_HOME"                    help:"defaults to ~/.config/forge/"`
+	List        bool   `arg:"--list"         default:"false"    help:"list repos in your config"`
+	Add         bool   `arg:"--add"          default:"false"    help:"add a new repo"`
+	Delete      bool   `arg:"--delete"       default:"false"    help:"delete a repo"`
+	Update      bool   `arg:"--update"       default:"false"    help:"update a repo"`
+	GoPath      string `arg:"--gopath"                          help:"gopath of the repo"`
+	Directory   bool   `arg:"--directory"    default:"false"    help:"repo is a directory to match against"`
+	ReadOnly    bool   `arg:"--readonly"     default:"false"    help:"repo is readonly"`
+	Writable    bool   `arg:"--writable"     default:"false"    help:"repo is writable"`
+	Favorite    bool   `arg:"--favorite"     default:"false"    help:"forge will always go-clone or git clone this"`
+	Private     bool   `arg:"--private"      default:"false"    help:"repo can not be published"`
+	Interesting bool   `arg:"--interesting"  default:"false"    help:"something you decided was cool"`
+}
+
+func (a args) Description() string {
+	return `
+         forgeConfig -- add entries to your config files
+
+This is just example protobuf code to test forgepb is working
+but it could be used to automagically create a config file too.
+
+If you need to change your config file, just edit the forge.text or forge.json
+files then remove the forge.pb and ConfigLoad() will attempt to load those files instead
+`
+}
+
+func (args) Version() string {
+	return "virtigo " + VERSION
+}
+
+func init() {
+	var pp *arg.Parser
+	pp = arg.MustParse(&argv)
+
+	if pp == nil {
+		pp.WriteHelp(os.Stdout)
+		os.Exit(0)
+	}
+}

scanGoSrc/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"os"
+
+	"go.wit.com/lib/protobuf/forgepb"
+	"go.wit.com/lib/protobuf/gitpb"
+	"go.wit.com/log"
+)
+
+// sent via ldflags
+var VERSION string
+
+func main() {
+	var config forgepb.ForgeConfigs
+	if err := config.ConfigLoad(); err != nil {
+		log.Warn("forgepb.ConfigLoad() failed", err)
+		os.Exit(-1)
+	}
+
+	config.PrintTable()
+
+	var repos *gitpb.Repos
+	repos = new(gitpb.Repos)
+
+	newr, err := repos.NewGoPath("/home/jcarr/go/src", "go.wit.com/apps/wit-package")
+	if err != nil {
+		log.Info("init failed", err)
+	} else {
+		log.Info("init worked for", newr.GoPath)
+	}
+
+	newr, err = repos.NewGoPath("/home/jcarr/go/src", "go.wit.com/apps/notathing")
+	if err != nil {
+		log.Info("init failed correctly:", err)
+	} else {
+		log.Info("init should have failed for", newr.GoPath)
+	}
+
+	/*
+		log.Info(forgepb.RepoHeader())
+		loop := repos.SortByPath() // get the list of repos
+		for loop.Scan() {
+			r := loop.Repo()
+			log.Info("repo:", r.GoPath)
+		}
+	*/
+	/*
+		log.Info("going to add a new repo", argv.GoPath)
+		new1 := forgepb.Repo{
+			GoPath:      argv.GoPath,
+			Writable:    argv.Writable,
+			ReadOnly:    argv.ReadOnly,
+			Private:     argv.Private,
+			Directory:   argv.Directory,
+			Favorite:    argv.Favorite,
+			Interesting: argv.Interesting,
+		}
+	*/
+	os.Exit(0)
+}

shell.go

@@ -0,0 +1,51 @@
+package gitpb
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/go-cmd/cmd"
+	"go.wit.com/lib/gui/shell"
+	"go.wit.com/log"
+)
+
+// execute something with the working directory
+// set to the FullPath
+func (repo *Repo) Run(cmd []string) cmd.Status {
+	result := shell.PathRun(repo.FullPath, cmd)
+	output := strings.Join(result.Stdout, "\n")
+	if result.Error != nil {
+		log.Warn("cmd:", cmd)
+		log.Warn("ouptput:", output)
+		log.Warn("failed with error:", result.Error)
+	}
+	return result
+}
+
+// for now, even check cmd.Exit
+func (repo *Repo) strictRun(cmd []string) (bool, error) {
+	result := repo.Run(cmd)
+	if result.Error != nil {
+		log.Warn("go mod init failed err:", result.Error)
+		return false, result.Error
+	}
+	if result.Exit != 0 {
+		log.Warn("go mod init exit =", result.Exit)
+		return false, result.Error
+	}
+	return true, nil
+}
+
+func (repo *Repo) Exists(filename string) bool {
+	if repo == nil {
+		log.Warn("repo == nil for Exists()")
+		panic(-1)
+	}
+	testf := filepath.Join(repo.FullPath, filename)
+	_, err := os.Stat(testf)
+	if err != nil {
+		return false
+	}
+	return true
+}