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refactor(template): isolate and add tests (#2069)

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* refactor(template): isolate and add tests

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

---------

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Signed-off-by: Dave <dave@gray101.com>
Co-authored-by: Dave <dave@gray101.com>
This commit is contained in:
Ettore Di Giacinto 2024-04-19 04:40:18 +02:00 committed by GitHub
parent 852316c5a6
commit 27ec84827c
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GPG Key ID: B5690EEEBB952194
6 changed files with 218 additions and 95 deletions
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111
pkg/model/loader.go
View File

@ -1,18 +1,19 @@
package model
import (
"bytes"
"context"
"fmt"
"os"
"path/filepath"
"strings"
"sync"
"text/template"
"github.com/Masterminds/sprig/v3"
"github.com/go-skynet/LocalAI/pkg/templates"
"github.com/go-skynet/LocalAI/pkg/functions"
"github.com/go-skynet/LocalAI/pkg/grpc"
"github.com/go-skynet/LocalAI/pkg/utils"
process "github.com/mudler/go-processmanager"
"github.com/rs/zerolog/log"
)
@ -42,21 +43,6 @@ type ChatMessageTemplateData struct {
LastMessage bool
}
// Keep this in sync with config.TemplateConfig. Is there a more idiomatic way to accomplish this in go?
// Technically, order doesn't _really_ matter, but the count must stay in sync, see tests/integration/reflect_test.go
type TemplateType int
const (
ChatPromptTemplate TemplateType = iota
ChatMessageTemplate
CompletionPromptTemplate
EditPromptTemplate
FunctionsPromptTemplate
// The following TemplateType is **NOT** a valid value and MUST be last. It exists to make the sanity integration tests simpler!
IntegrationTestTemplate
)
// new idea: what if we declare a struct of these here, and use a loop to check?
// TODO: Split ModelLoader and TemplateLoader? Just to keep things more organized. Left together to share a mutex until I look into that. Would split if we seperate directories for .bin/.yaml and .tmpl
@ -67,7 +53,7 @@ type ModelLoader struct {
grpcClients map[string]grpc.Backend
models map[string]ModelAddress
grpcProcesses map[string]*process.Process
templates map[TemplateType]map[string]*template.Template
templates *templates.TemplateCache
wd *WatchDog
}
@ -86,11 +72,10 @@ func NewModelLoader(modelPath string) *ModelLoader {
ModelPath: modelPath,
grpcClients: make(map[string]grpc.Backend),
models: make(map[string]ModelAddress),
templates: make(map[TemplateType]map[string]*template.Template),
templates: templates.NewTemplateCache(modelPath),
grpcProcesses: make(map[string]*process.Process),
}
nml.initializeTemplateMap()
return nml
}
@ -99,7 +84,7 @@ func (ml *ModelLoader) SetWatchDog(wd *WatchDog) {
}
func (ml *ModelLoader) ExistsInModelPath(s string) bool {
return existsInPath(ml.ModelPath, s)
return utils.ExistsInPath(ml.ModelPath, s)
}
func (ml *ModelLoader) ListModels() ([]string, error) {
@ -194,82 +179,22 @@ func (ml *ModelLoader) CheckIsLoaded(s string) ModelAddress {
return ""
}
func (ml *ModelLoader) EvaluateTemplateForPrompt(templateType TemplateType, templateName string, in PromptTemplateData) (string, error) {
const (
ChatPromptTemplate templates.TemplateType = iota
ChatMessageTemplate
CompletionPromptTemplate
EditPromptTemplate
FunctionsPromptTemplate
)
func (ml *ModelLoader) EvaluateTemplateForPrompt(templateType templates.TemplateType, templateName string, in PromptTemplateData) (string, error) {
// TODO: should this check be improved?
if templateType == ChatMessageTemplate {
return "", fmt.Errorf("invalid templateType: ChatMessage")
}
return ml.evaluateTemplate(templateType, templateName, in)
return ml.templates.EvaluateTemplate(templateType, templateName, in)
}
func (ml *ModelLoader) EvaluateTemplateForChatMessage(templateName string, messageData ChatMessageTemplateData) (string, error) {
return ml.evaluateTemplate(ChatMessageTemplate, templateName, messageData)
}
func existsInPath(path string, s string) bool {
_, err := os.Stat(filepath.Join(path, s))
return err == nil
}
func (ml *ModelLoader) initializeTemplateMap() {
// This also seems somewhat clunky as we reference the Test / End of valid data value slug, but it works?
for tt := TemplateType(0); tt < IntegrationTestTemplate; tt++ {
ml.templates[tt] = make(map[string]*template.Template)
}
}
func (ml *ModelLoader) evaluateTemplate(templateType TemplateType, templateName string, in interface{}) (string, error) {
ml.mu.Lock()
defer ml.mu.Unlock()
m, ok := ml.templates[templateType][templateName]
if !ok {
// return "", fmt.Errorf("template not loaded: %s", templateName)
loadErr := ml.loadTemplateIfExists(templateType, templateName)
if loadErr != nil {
return "", loadErr
}
m = ml.templates[templateType][templateName] // ok is not important since we check m on the next line, and wealready checked
}
if m == nil {
return "", fmt.Errorf("failed loading a template for %s", templateName)
}
var buf bytes.Buffer
if err := m.Execute(&buf, in); err != nil {
return "", err
}
return buf.String(), nil
}
func (ml *ModelLoader) loadTemplateIfExists(templateType TemplateType, templateName string) error {
// Check if the template was already loaded
if _, ok := ml.templates[templateType][templateName]; ok {
return nil
}
// Check if the model path exists
// skip any error here - we run anyway if a template does not exist
modelTemplateFile := fmt.Sprintf("%s.tmpl", templateName)
dat := ""
if ml.ExistsInModelPath(modelTemplateFile) {
d, err := os.ReadFile(filepath.Join(ml.ModelPath, modelTemplateFile))
if err != nil {
return err
}
dat = string(d)
} else {
dat = templateName
}
// Parse the template
tmpl, err := template.New("prompt").Funcs(sprig.FuncMap()).Parse(dat)
if err != nil {
return err
}
ml.templates[templateType][templateName] = tmpl
return nil
return ml.templates.EvaluateTemplate(ChatMessageTemplate, templateName, messageData)
}

7
pkg/model/loader_test.go
View File

@ -92,10 +92,13 @@ var testMatch map[string]map[string]interface{} = map[string]map[string]interfac
var _ = Describe("Templates", func() {
Context("chat message", func() {
modelLoader := NewModelLoader("")
var modelLoader *ModelLoader
BeforeEach(func() {
modelLoader = NewModelLoader("")
})
for key := range testMatch {
foo := testMatch[key]
It("renders correctly "+key, func() {
It("renders correctly `"+key+"`", func() {
templated, err := modelLoader.EvaluateTemplateForChatMessage(foo["template"].(string), foo["data"].(model.ChatMessageTemplateData))
Expect(err).ToNot(HaveOccurred())
Expect(templated).To(Equal(foo["expected"]), templated)

103
pkg/templates/cache.go Normal file
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@ -0,0 +1,103 @@
package templates
import (
"bytes"
"fmt"
"os"
"path/filepath"
"sync"
"text/template"
"github.com/go-skynet/LocalAI/pkg/utils"
"github.com/Masterminds/sprig/v3"
)
// Keep this in sync with config.TemplateConfig. Is there a more idiomatic way to accomplish this in go?
// Technically, order doesn't _really_ matter, but the count must stay in sync, see tests/integration/reflect_test.go
type TemplateType int
type TemplateCache struct {
mu sync.Mutex
templatesPath string
templates map[TemplateType]map[string]*template.Template
}
func NewTemplateCache(templatesPath string) *TemplateCache {
tc := &TemplateCache{
templatesPath: templatesPath,
templates: make(map[TemplateType]map[string]*template.Template),
}
return tc
}
func (tc *TemplateCache) initializeTemplateMapKey(tt TemplateType) {
if _, ok := tc.templates[tt]; !ok {
tc.templates[tt] = make(map[string]*template.Template)
}
}
func (tc *TemplateCache) EvaluateTemplate(templateType TemplateType, templateName string, in interface{}) (string, error) {
tc.mu.Lock()
defer tc.mu.Unlock()
tc.initializeTemplateMapKey(templateType)
m, ok := tc.templates[templateType][templateName]
if !ok {
// return "", fmt.Errorf("template not loaded: %s", templateName)
loadErr := tc.loadTemplateIfExists(templateType, templateName)
if loadErr != nil {
return "", loadErr
}
m = tc.templates[templateType][templateName] // ok is not important since we check m on the next line, and wealready checked
}
if m == nil {
return "", fmt.Errorf("failed loading a template for %s", templateName)
}
var buf bytes.Buffer
if err := m.Execute(&buf, in); err != nil {
return "", err
}
return buf.String(), nil
}
func (tc *TemplateCache) loadTemplateIfExists(templateType TemplateType, templateName string) error {
// Check if the template was already loaded
if _, ok := tc.templates[templateType][templateName]; ok {
return nil
}
// Check if the model path exists
// skip any error here - we run anyway if a template does not exist
modelTemplateFile := fmt.Sprintf("%s.tmpl", templateName)
dat := ""
file := filepath.Join(tc.templatesPath, modelTemplateFile)
// Security check
if err := utils.VerifyPath(modelTemplateFile, tc.templatesPath); err != nil {
return fmt.Errorf("template file outside path: %s", file)
}
if utils.ExistsInPath(tc.templatesPath, modelTemplateFile) {
d, err := os.ReadFile(file)
if err != nil {
return err
}
dat = string(d)
} else {
dat = templateName
}
// Parse the template
tmpl, err := template.New("prompt").Funcs(sprig.FuncMap()).Parse(dat)
if err != nil {
return err
}
tc.templates[templateType][templateName] = tmpl
return nil
}

73
pkg/templates/cache_test.go Normal file
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@ -0,0 +1,73 @@
package templates_test
import (
"os"
"path/filepath"
"github.com/go-skynet/LocalAI/pkg/templates" // Update with your module path
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("TemplateCache", func() {
var (
templateCache *templates.TemplateCache
tempDir string
)
BeforeEach(func() {
var err error
tempDir, err = os.MkdirTemp("", "templates")
Expect(err).NotTo(HaveOccurred())
// Writing example template files
err = os.WriteFile(filepath.Join(tempDir, "example.tmpl"), []byte("Hello, {{.Name}}!"), 0644)
Expect(err).NotTo(HaveOccurred())
err = os.WriteFile(filepath.Join(tempDir, "empty.tmpl"), []byte(""), 0644)
Expect(err).NotTo(HaveOccurred())
templateCache = templates.NewTemplateCache(tempDir)
})
AfterEach(func() {
os.RemoveAll(tempDir) // Clean up
})
Describe("EvaluateTemplate", func() {
Context("when template is loaded successfully", func() {
It("should evaluate the template correctly", func() {
result, err := templateCache.EvaluateTemplate(1, "example", map[string]string{"Name": "Gopher"})
Expect(err).NotTo(HaveOccurred())
Expect(result).To(Equal("Hello, Gopher!"))
})
})
Context("when template isn't a file", func() {
It("should parse from string", func() {
result, err := templateCache.EvaluateTemplate(1, "{{.Name}}", map[string]string{"Name": "Gopher"})
Expect(err).ToNot(HaveOccurred())
Expect(result).To(Equal("Gopher"))
})
})
Context("when template is empty", func() {
It("should return an empty string", func() {
result, err := templateCache.EvaluateTemplate(1, "empty", nil)
Expect(err).NotTo(HaveOccurred())
Expect(result).To(Equal(""))
})
})
})
Describe("concurrency", func() {
It("should handle multiple concurrent accesses", func(done Done) {
go func() {
_, _ = templateCache.EvaluateTemplate(1, "example", map[string]string{"Name": "Gopher"})
}()
go func() {
_, _ = templateCache.EvaluateTemplate(1, "example", map[string]string{"Name": "Gopher"})
}()
close(done)
}, 0.1) // timeout in seconds
})
})

13
pkg/templates/utils_suite_test.go Normal file
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@ -0,0 +1,13 @@
package templates_test
import (
"testing"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
func TestTemplates(t *testing.T) {
RegisterFailHandler(Fail)
RunSpecs(t, "Templates test suite")
}

6
pkg/utils/path.go
View File

@ -2,10 +2,16 @@ package utils
import (
"fmt"
"os"
"path/filepath"
"strings"
)
func ExistsInPath(path string, s string) bool {
_, err := os.Stat(filepath.Join(path, s))
return err == nil
}
func inTrustedRoot(path string, trustedRoot string) error {
for path != "/" {
path = filepath.Dir(path)