revert(language): do not error when not installed

this reverts commit f23968a39c
as this was an incorrect solution to #2880, it can stay as is

src/segments/angular.go

@@ -33,7 +33,7 @@ func (a *Angular) Enabled() bool {
 	return a.language.Enabled()
 }
 
-func (a *Angular) getVersion() string {
+func (a *Angular) getVersion() (string, error) {
 	// tested by nx_test.go
 	return getNodePackageVersion(a.language.env, filepath.Join("@angular", "core"))
 }

src/segments/golang.go

@@ -39,22 +39,20 @@ func (g *Golang) Init(props properties.Properties, env environment.Environment)
 	}
 }
 
-func (g *Golang) getVersion() string {
+func (g *Golang) getVersion() (string, error) {
 	if !g.props.GetBool(ParseModFile, false) {
-		return ""
+		return "", nil
 	}
 	gomod, err := g.language.env.HasParentFilePath("go.mod")
 	if err != nil {
-		g.env.Log(environment.Debug, "getVersion", err.Error())
-		return ""
+		return "", nil
 	}
 	contents := g.language.env.FileContent(gomod.Path)
 	file, err := modfile.Parse(gomod.Path, []byte(contents), nil)
 	if err != nil {
-		g.env.Log(environment.Debug, "getVersion", err.Error())
-		return ""
+		return "", err
 	}
-	return file.Go.Version
+	return file.Go.Version, nil
 }
 
 func (g *Golang) Enabled() bool {

src/segments/golang_test.go

@@ -10,7 +10,6 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	mock2 "github.com/stretchr/testify/mock"
 )
 
 type mockedLanguageParams struct {
@@ -30,7 +29,6 @@ func getMockedLanguageEnv(params *mockedLanguageParams) (*mock.MockedEnvironment
 	env.On("TemplateCache").Return(&environment.TemplateCache{
 		Env: make(map[string]string),
 	})
-	env.On("Log", mock2.Anything, mock2.Anything, mock2.Anything)
 	props := properties.Map{
 		properties.FetchVersion: true,
 	}

src/segments/language.go

@@ -17,7 +17,7 @@ type loadContext func()
 
 type inContext func() bool
 
-type getVersion func() string
+type getVersion func() (string, error)
 type matchesVersionFile func() bool
 
 type version struct {
@@ -171,8 +171,9 @@ func (l *language) setVersion() error {
 				continue
 			}
 		} else {
-			versionStr = command.getVersion()
-			if len(versionStr) == 0 {
+			versionStr, err = command.getVersion()
+			if err != nil || versionStr == "" {
+				lastError = errors.New("cannot get version")
 				continue
 			}
 		}

src/segments/nx.go

@@ -35,23 +35,21 @@ func (a *Nx) Enabled() bool {
 	return a.language.Enabled()
 }
 
-func (a *Nx) getVersion() string {
+func (a *Nx) getVersion() (string, error) {
 	return getNodePackageVersion(a.language.env, "nx")
 }
 
-func getNodePackageVersion(env environment.Environment, nodePackage string) string {
+func getNodePackageVersion(env environment.Environment, nodePackage string) (string, error) {
 	const fileName string = "package.json"
 	folder := filepath.Join(env.Pwd(), "node_modules", nodePackage)
 	if !env.HasFilesInDir(folder, fileName) {
-		env.Log(environment.Debug, "getNodePackageVersion", fmt.Sprintf("%s not found in %s", fileName, folder))
-		return ""
+		return "", fmt.Errorf("%s not found in %s", fileName, folder)
 	}
 	content := env.FileContent(filepath.Join(folder, fileName))
 	var data ProjectData
 	err := json.Unmarshal([]byte(content), &data)
 	if err != nil {
-		env.Log(environment.Debug, "getNodePackageVersion", err.Error())
-		return ""
+		return "", err
 	}
-	return data.Version
+	return data.Version, nil
 }

src/segments/nx_test.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	mock2 "github.com/stretchr/testify/mock"
 )
 
 func TestGetNodePackageVersion(t *testing.T) {
@@ -34,12 +33,12 @@ func TestGetNodePackageVersion(t *testing.T) {
 		env.On("TemplateCache").Return(&environment.TemplateCache{
 			Env: make(map[string]string),
 		})
-		env.On("Log", mock2.Anything, mock2.Anything, mock2.Anything)
-		got := getNodePackageVersion(env, "nx")
+		got, err := getNodePackageVersion(env, "nx")
 		if tc.ShouldFail {
-			assert.Empty(t, got, tc.Case)
+			assert.Error(t, err, tc.Case)
 			return
 		}
+		assert.Nil(t, err, tc.Case)
 		assert.Equal(t, tc.Version, got, tc.Case)
 	}
 }

src/segments/python.go

@@ -1,6 +1,7 @@
 package segments
 
 import (
+	"errors"
 	"fmt"
 	"oh-my-posh/environment"
 	"oh-my-posh/properties"
@@ -98,7 +99,7 @@ func (p *Python) canUseVenvName(name string) bool {
 	return true
 }
 
-func (p *Python) pyenvVersion() string {
+func (p *Python) pyenvVersion() (string, error) {
 	// Use `pyenv root` instead of $PYENV_ROOT?
 	// Is our Python executable at $PYENV_ROOT/bin/python ?
 	// Should p.env expose command paths?
@@ -107,43 +108,37 @@ func (p *Python) pyenvVersion() string {
 		path = p.env.CommandPath("python3")
 	}
 	if len(path) == 0 {
-		p.env.Log(environment.Debug, "pyenvVersion", "python not found")
-		return ""
+		return "", errors.New("no python executable found")
 	}
 	pyEnvRoot := p.env.Getenv("PYENV_ROOT")
 	// TODO:  pyenv-win has this at $PYENV_ROOT/pyenv-win/shims
 	if path != filepath.Join(pyEnvRoot, "shims", "python") {
-		p.env.Log(environment.Debug, "pyenvVersion", fmt.Sprintf("executable at %s is not a pyenv shim", path))
-		return ""
+		return "", fmt.Errorf("executable at %s is not a pyenv shim", path)
 	}
 	// pyenv version-name will return current version or virtualenv
 	cmdOutput, err := p.env.RunCommand("pyenv", "version-name")
 	if err != nil {
-		p.env.Log(environment.Debug, "pyenvVersion", err.Error())
-		return ""
+		return "", err
 	}
 	versionString := strings.Split(cmdOutput, ":")[0]
 	if len(versionString) == 0 {
-		p.env.Log(environment.Debug, "pyenvVersion", "no pyenv version-name found")
-		return ""
+		return "", errors.New("no pyenv version-name found")
 	}
 
 	// $PYENV_ROOT/versions + versionString (symlinks resolved) == $PYENV_ROOT/versions/(version)[/envs/(virtualenv)]
 	realPath, err := p.env.ResolveSymlink(filepath.Join(pyEnvRoot, "versions", versionString))
 	if err != nil {
-		p.env.Log(environment.Debug, "pyenvVersion", err.Error())
-		return ""
+		return "", err
 	}
 	// ../versions/(version)[/envs/(virtualenv)]
 	shortPath, err := filepath.Rel(filepath.Join(pyEnvRoot, "versions"), realPath)
 	if err != nil {
-		p.env.Log(environment.Debug, "pyenvVersion", err.Error())
-		return ""
+		return "", err
 	}
 	// override virtualenv if pyenv set one
 	parts := strings.Split(shortPath, string(filepath.Separator))
 	if len(parts) > 2 && p.canUseVenvName(parts[2]) {
 		p.Venv = parts[2]
 	}
-	return parts[0]
+	return parts[0], nil
 }

src/segments/python_test.go

@@ -93,7 +93,6 @@ func TestPythonTemplate(t *testing.T) {
 		env.On("Pwd").Return("/usr/home/project")
 		env.On("Home").Return("/usr/home")
 		env.On("ResolveSymlink", mock2.Anything).Return(tc.ResolveSymlink.Path, tc.ResolveSymlink.Err)
-		env.On("Log", mock2.Anything, mock2.Anything, mock2.Anything)
 		props := properties.Map{
 			properties.FetchVersion: tc.FetchVersion,
 			UsePythonVersionFile:    true,