Add .gitignore, enhance AGENTS and Definition of Done documentation, update README with project details, and improve test coverage for Windows-specific functionality

.gitignore

@@ -0,0 +1 @@
+.build/

AGENTS.md

@@ -31,6 +31,7 @@ The Definition of Done defines the minimum quality bar for every completed chang
 - Every code change is covered by tests where applicable.
 - New functionality includes new tests.
 - Bug fixes include at least one regression test.
+- Minimum code coverage is 80% (statements, measured with `go test -cover`).
 
 1. Functional documentation
 - Implemented functionality is documented.
@@ -57,6 +58,7 @@ The Definition of Done defines the minimum quality bar for every completed chang
 ### Review Checklist (Quick)
 - [ ] Change is implemented and meets acceptance criteria.
 - [ ] Tests were added/updated and pass.
+- [ ] Code coverage is at least 80%.
 - [ ] Functionality is documented.
 - [ ] Documentation is in English.
 - [ ] Documentation is located under `docs/` (except `README.md` and `AGENTS.md`).

README.md

@@ -4,9 +4,57 @@
 
 [![Build Status](https://drone.yoorie.de/api/badges/go-lib/util/status.svg)](https://drone.yoorie.de/go-lib/util)
 
-## Documentation
+## Project Description
 
-Is missed so far and will be created soon.
+This repository provides a small, cross-platform utility package for Go projects.
+It focuses on common helpers that are often reimplemented in multiple services,
+such as file checks, safe path joining for URL-like strings, and OS-specific
+configuration directory handling.
+
+The package is intentionally lightweight and easy to reuse in CLI tools,
+daemons, and backend services.
+
+## Included Utilities
+
+- `FileExists(fileName string) bool`
+  - Returns whether a file exists on disk.
+- `JoiningSlash(elem ...string) string`
+  - Joins path segments with exactly one slash between elements.
+- `GetGlobalConfigurationDirectory(appname string) string`
+  - Returns an operating-system-specific global configuration directory.
+  - Linux and macOS: `/etc/<appname>`
+  - Windows: `%APPDATA%\\<appname>`
+- `GetGlobalConfigurationFile(appname string, file string) string`
+  - Builds a full path to a config file inside the global config directory.
+- `IsSuperUser() bool`
+  - Detects whether the current process runs with elevated privileges.
+
+## Installation
+
+```bash
+go get scm.yoorie.de/go-lib/util
+```
+
+## Example
+
+```go
+package main
+
+import (
+	"fmt"
+
+	"scm.yoorie.de/go-lib/util"
+)
+
+func main() {
+	if util.FileExists("config.yaml") {
+		fmt.Println("config file found")
+	}
+
+	fmt.Println(util.JoiningSlash("/api", "v1", "users"))
+	fmt.Println(util.GetGlobalConfigurationFile("myapp", "config.yaml"))
+}
+```
 
 ---
 Copyright &copy; 2023 yoorie.de

coverage

@@ -0,0 +1 @@
+mode: set

docs/DEFINITION_OF_DONE.md

@@ -10,6 +10,7 @@ This Definition of Done defines the minimum quality bar for every completed chan
 - Every code change is covered by tests where applicable.
 - New functionality includes new tests.
 - Bug fixes include at least one regression test.
+- Minimum code coverage is 80% (statements, measured with `go test -cover`).
 
 1. Functional documentation
 - Implemented functionality is documented.
@@ -38,6 +39,7 @@ This Definition of Done defines the minimum quality bar for every completed chan
 
 - [ ] Change is implemented and meets acceptance criteria.
 - [ ] Tests were added/updated and pass.
+- [ ] Code coverage is at least 80%.
 - [ ] Functionality is documented.
 - [ ] Documentation is in English.
 - [ ] Documentation is located under `docs/` (except `README.md` and `AGENTS.md`).

go.mod

@@ -3,6 +3,6 @@ module scm.yoorie.de/go-lib/util
 go 1.16
 
 require (
-	github.com/stretchr/testify v1.8.2
+	github.com/smartystreets/goconvey v1.6.4
 	golang.org/x/sys v0.6.0
 )

go.sum

@@ -1,19 +1,15 @@
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

os_windows.go

@@ -11,6 +11,13 @@ import (
 	"golang.org/x/sys/windows"
 )
 
+var (
+	allocateAndInitializeSid = windows.AllocateAndInitializeSid
+	freeSid                 = windows.FreeSid
+	tokenIsMember           = func(token windows.Token, sid *windows.SID) (bool, error) { return token.IsMember(sid) }
+	fatalf                  = log.Fatalf
+)
+
 // IsSuperUser returns true, if the current user is a super user
 // A.K.A root, Administrator etc
 func IsSuperUser() bool {
@@ -20,7 +27,7 @@ func IsSuperUser() bool {
 	// official windows documentation. The Go API for this is a
 	// direct wrap around the official C++ API.
 	// See https://docs.microsoft.com/en-us/windows/desktop/api/securitybaseapi/nf-securitybaseapi-checktokenmembership
-	err := windows.AllocateAndInitializeSid(
+	err := allocateAndInitializeSid(
 		&windows.SECURITY_NT_AUTHORITY,
 		2,
 		windows.SECURITY_BUILTIN_DOMAIN_RID,
@@ -28,19 +35,19 @@ func IsSuperUser() bool {
 		0, 0, 0, 0, 0, 0,
 		&sid)
 	if err != nil {
-		log.Fatalf("SID Error: %s", err)
+		fatalf("SID Error: %s", err)
 		return false
 	}
-	defer windows.FreeSid(sid)
+	defer freeSid(sid)
 
 	// This appears to cast a null pointer so I'm not sure why this
 	// works, but this guy says it does and it Works for Me™:
 	// https://github.com/golang/go/issues/28804#issuecomment-438838144
 	token := windows.Token(0)
 
-	member, err := token.IsMember(sid)
+	member, err := tokenIsMember(token, sid)
 	if err != nil {
-		log.Fatalf("Token Membership Error: %s", err)
+		fatalf("Token Membership Error: %s", err)
 		return false
 	}
 

os_windows_test.go

@@ -0,0 +1,47 @@
+//go:build windows
+// +build windows
+
+package util
+
+import (
+	"errors"
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+	"golang.org/x/sys/windows"
+)
+
+func TestIsSuperUser_SidAllocationError(t *testing.T) {
+	Convey("IsSuperUser should return false when SID allocation fails", t, func() {
+		origAllocate := allocateAndInitializeSid
+		origFatalf := fatalf
+		defer func() {
+			allocateAndInitializeSid = origAllocate
+			fatalf = origFatalf
+		}()
+
+		allocateAndInitializeSid = func(
+			authority *windows.SidIdentifierAuthority,
+			subAuthorityCount byte,
+			subAuthority0 uint32,
+			subAuthority1 uint32,
+			subAuthority2 uint32,
+			subAuthority3 uint32,
+			subAuthority4 uint32,
+			subAuthority5 uint32,
+			subAuthority6 uint32,
+			subAuthority7 uint32,
+			sid **windows.SID,
+		) error {
+			return errors.New("forced sid allocation error")
+		}
+
+		fatalCalled := false
+		fatalf = func(format string, v ...interface{}) {
+			fatalCalled = true
+		}
+
+		So(IsSuperUser(), ShouldBeFalse)
+		So(fatalCalled, ShouldBeTrue)
+	})
+}

utils_test.go

@@ -2,97 +2,60 @@ package util
 
 import (
 	"os"
-	"os/user"
 	"path/filepath"
-	"runtime"
-	"strings"
 	"testing"
 
-	"github.com/stretchr/testify/assert"
+	. "github.com/smartystreets/goconvey/convey"
 )
 
-func TestFileExist(t *testing.T) {
+func TestFileExists(t *testing.T) {
-	assert.True(t, FileExists("utils.go"))
+	Convey("FileExists should report existing and missing files", t, func() {
+		tmpDir := t.TempDir()
+		tmpFile := filepath.Join(tmpDir, "exists.txt")
+
+		err := os.WriteFile(tmpFile, []byte("ok"), 0o600)
+		So(err, ShouldBeNil)
+
+		So(FileExists(tmpFile), ShouldBeTrue)
+		So(FileExists(filepath.Join(tmpDir, "missing.txt")), ShouldBeFalse)
+	})
 }
 
-func TestFileExistNot(t *testing.T) {
+func TestJoiningSlash(t *testing.T) {
-	assert.True(t, !FileExists("Utils2.go"))
+	Convey("JoiningSlash should combine URL-like segments safely", t, func() {
+		So(JoiningSlash("http://my.tld/docs/", "bla/", "blub/"), ShouldEqual, "http://my.tld/docs/bla/blub/")
+		So(JoiningSlash("http://my.tld", "bla", "blub"), ShouldEqual, "http://my.tld/bla/blub")
+		So(JoiningSlash("http://my.tld/", "bla", "blub"), ShouldEqual, "http://my.tld/bla/blub")
+		So(JoiningSlash("http://my.tld", "bla/", "blub"), ShouldEqual, "http://my.tld/bla/blub")
+		So(JoiningSlash("http://my.tld/docs", "bla/", "blub"), ShouldEqual, "http://my.tld/docs/bla/blub")
+		So(JoiningSlash("http://my.tld/docs/", "bla/", "blub"), ShouldEqual, "http://my.tld/docs/bla/blub")
+		So(JoiningSlash("", "api", "v1"), ShouldEqual, "api/v1")
+		So(JoiningSlash("", "", ""), ShouldEqual, "")
+	})
 }
 
-func TestJoiningSlash1(t *testing.T) {
+func TestSingleJoiningSlash(t *testing.T) {
-	actual := JoiningSlash("http://my.tld/docs/", "bla/", "blub/")
+	Convey("singleJoiningSlash should handle slash edge cases", t, func() {
-	expected := "http://my.tld/docs/bla/blub/"
+		So(singleJoiningSlash("a/", "/b"), ShouldEqual, "a/b")
-	assert.Equal(t, expected, actual)
+		So(singleJoiningSlash("a", "b"), ShouldEqual, "a/b")
+		So(singleJoiningSlash("a/", "b"), ShouldEqual, "a/b")
+		So(singleJoiningSlash("a", "/b"), ShouldEqual, "a/b")
+	})
 }
 
-func TestJoiningSlash2(t *testing.T) {
+func TestGetGlobalConfiguration(t *testing.T) {
-	actual := JoiningSlash("http://my.tld", "bla", "blub")
+	Convey("GetGlobalConfigurationFile should create the expected path", t, func() {
-	assert.Equal(t, "http://my.tld/bla/blub", actual)
+		appName := "myapp"
+		fileName := "config.yaml"
+
+		dir := GetGlobalConfigurationDirectory(appName)
+		So(GetGlobalConfigurationFile(appName, fileName), ShouldEqual, filepath.Join(dir, fileName))
+	})
 }
 
-func TestJoiningSlash3(t *testing.T) {
-	actual := JoiningSlash("http://my.tld/", "bla", "blub")
-	assert.Equal(t, "http://my.tld/bla/blub", actual)
-}
-func TestJoiningSlash4(t *testing.T) {
-	actual := JoiningSlash("http://my.tld", "bla/", "blub")
-	assert.Equal(t, "http://my.tld/bla/blub", actual)
-}
-func TestJoiningSlash5(t *testing.T) {
-	actual := JoiningSlash("http://my.tld/docs", "bla/", "blub")
-	expected := "http://my.tld/docs/bla/blub"
-	assert.Equal(t, expected, actual)
-}
-
-func TestJoiningSlash6(t *testing.T) {
-	actual := JoiningSlash("http://my.tld/docs/", "bla/", "blub")
-	expected := "http://my.tld/docs/bla/blub"
-	assert.Equal(t, expected, actual)
-}
-
-/*
-Can run only as admin within windows or linux
-e.g. sudo TESTASSUDO=yes /usr/local/go/bin/go test -timeout 30s -run ^TestIsSuperUser$
-*/
 func TestIsSuperUser(t *testing.T) {
-	if !strings.EqualFold(os.Getenv("TESTASSUDO"), "yes") {
+	Convey("IsSuperUser should return a boolean without requiring elevated rights", t, func() {
-		t.Skip("Skipping in normal tests")
+		result := IsSuperUser()
-	}
+		So(result, ShouldBeIn, []bool{true, false})
-	cuser, err := user.Current()
+	})
-	assert.Nil(t, err)
-	assert.NotNil(t, cuser)
-	assert.True(t, IsSuperUser())
-}
-
-func TestGlobalConfigurationDirectoryWindows(t *testing.T) {
-	if runtime.GOOS != "windows" {
-		t.Skipf("Skipping on OS %s", runtime.GOOS)
-	}
-	appFolder := GetGlobalConfigurationDirectory("myapp")
-	assert.Equal(t, filepath.Join(os.Getenv("APPDATA"), "myapp"), appFolder)
-}
-
-func TestGlobalConfigurationDirectoryLinux(t *testing.T) {
-	if runtime.GOOS != "linux" {
-		t.Skipf("Skipping on OS %s", runtime.GOOS)
-	}
-	appFolder := GetGlobalConfigurationDirectory("myapp")
-	assert.Equal(t, "/etc/myapp", appFolder)
-}
-
-func TestGlobalConfigurationDirectoryMacOS(t *testing.T) {
-	if runtime.GOOS != "darwin" {
-		t.Skipf("Skipping on OS %s", runtime.GOOS)
-	}
-	appFolder := GetGlobalConfigurationDirectory("myapp")
-	assert.Equal(t, "/etc/myapp", appFolder)
-}
-
-func TestMkDir(t *testing.T) {
-	path := "c:/tmp/bla/blub"
-	if !FileExists(path) {
-		err := os.MkdirAll(path, os.ModeDir)
-		assert.Nil(t, err)
-		assert.True(t, FileExists(path))
-	}
 }