feat(runner): add basic diffusers server

Dockerfile.runner

@@ -2,6 +2,8 @@
 
 ARG TAG=2024-11-21a-empty
 
+FROM ghcr.io/astral-sh/uv:0.5.4 as uv
+
 ### BUILD
 
 FROM golang:1.22 AS go-build-env
@@ -45,6 +47,15 @@ WORKDIR /workspace/helix
 # Copy runner directory from the repo
 COPY runner ./runner
 
+# We need to set this environment variable so that uv knows where
+# the virtual environment is to install packages
+ENV UV_PROJECT_ENVIRONMENT=/workspace/helix/runner/helix-diffusers/venv
+
+# Install the packages with uv using --mount=type=cache to cache the downloaded packages
+RUN --mount=type=cache,target=/root/.cache/uv \
+    --mount=from=uv,source=/uv,target=/usr/bin/uv \
+    cd /workspace/helix/runner/helix-diffusers && uv sync --no-dev
+
 # Copy the cog wrapper, cog and cog-sdxl is installed in the base image, this is just the cog server
 COPY cog/helix_cog_wrapper.py /workspace/cog-sdxl/helix_cog_wrapper.py
 

api/pkg/model/diffusers_generic.go

@@ -0,0 +1,68 @@
+package model
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+
+	"github.com/helixml/helix/api/pkg/types"
+)
+
+var _ Model = &DiffusersGenericImage{}
+
+type DiffusersGenericImage struct {
+	Id          string // e.g. "stabilityai/stable-diffusion-3.5-medium"
+	Name        string // e.g. "Stable Diffusion 3.5 Medium"
+	Memory      uint64
+	Description string
+	Hide        bool
+}
+
+func (i *DiffusersGenericImage) GetMemoryRequirements(mode types.SessionMode) uint64 {
+	return i.Memory
+}
+
+func (i *DiffusersGenericImage) GetType() types.SessionType {
+	return types.SessionTypeImage
+}
+
+func (i *DiffusersGenericImage) GetID() string {
+	return i.Id
+}
+
+func (i *DiffusersGenericImage) ModelName() ModelName {
+	return NewModel(i.Id)
+}
+
+func (i *DiffusersGenericImage) GetTask(session *types.Session, fileManager ModelSessionFileManager) (*types.RunnerTask, error) {
+	task, err := getGenericTask(session)
+	if err != nil {
+		return nil, err
+	}
+
+	return task, nil
+}
+
+func (i *DiffusersGenericImage) GetCommand(ctx context.Context, sessionFilter types.SessionFilter, config types.RunnerProcessConfig) (*exec.Cmd, error) {
+	return nil, fmt.Errorf("not implemented 1")
+}
+
+func (i *DiffusersGenericImage) GetTextStreams(mode types.SessionMode, eventHandler WorkerEventHandler) (*TextStream, *TextStream, error) {
+	return nil, nil, fmt.Errorf("not implemented 2")
+}
+
+func (i *DiffusersGenericImage) PrepareFiles(session *types.Session, isInitialSession bool, fileManager ModelSessionFileManager) (*types.Session, error) {
+	return nil, fmt.Errorf("not implemented 3")
+}
+
+func (i *DiffusersGenericImage) GetDescription() string {
+	return i.Description
+}
+
+func (i *DiffusersGenericImage) GetHumanReadableName() string {
+	return i.Name
+}
+
+func (i *DiffusersGenericImage) GetHidden() bool {
+	return i.Hide
+}

api/pkg/model/models.go

@@ -53,6 +53,16 @@ func (m ModelName) InferenceRuntime() types.InferenceRuntime {
 	if m.String() == Model_Cog_SDXL {
 		return types.InferenceRuntimeCog
 	}
+	diffusersModels, err := GetDefaultDiffusersModels()
+	if err != nil {
+		return types.InferenceRuntimeAxolotl
+	}
+	for _, model := range diffusersModels {
+		if m.String() == model.Id {
+			return types.InferenceRuntimeDiffusers
+		}
+	}
+
 	// misnamed: axolotl runtime handles axolotl and cog/sd-scripts
 	return types.InferenceRuntimeAxolotl
 }
@@ -112,7 +122,7 @@ func ProcessModelName(
 			}
 		}
 	case types.SessionTypeImage:
-		return Model_Cog_SDXL, nil
+		return Model_Diffusers_SD35, nil
 	}
 
 	// shouldn't get here
@@ -133,12 +143,20 @@ func GetModels() (map[string]Model, error) {
 	for _, model := range ollamaModels {
 		models[model.Id] = model
 	}
+	diffusersModels, err := GetDefaultDiffusersModels()
+	if err != nil {
+		return nil, err
+	}
+	for _, model := range diffusersModels {
+		models[model.Id] = model
+	}
 	return models, nil
 }
 
 const (
 	Model_Axolotl_Mistral7b string = "mistralai/Mistral-7B-Instruct-v0.1"
 	Model_Cog_SDXL          string = "stabilityai/stable-diffusion-xl-base-1.0"
+	Model_Diffusers_SD35    string = "stabilityai/stable-diffusion-3.5-medium"
 
 	// We only need constants for _some_ ollama models that are hardcoded in
 	// various places (backward compat). Other ones can be added dynamically now.
@@ -149,6 +167,18 @@ const (
 	Model_Ollama_Phi3                   string = "phi3:instruct"
 )
 
+func GetDefaultDiffusersModels() ([]*DiffusersGenericImage, error) {
+	return []*DiffusersGenericImage{
+		{
+			Id:          Model_Diffusers_SD35,
+			Name:        "Stable Diffusion 3.5 Medium",
+			Memory:      GB * 21,
+			Description: "Medium model, from Stability AI",
+			Hide:        false,
+		},
+	}, nil
+}
+
 // See also types/models.go for model name constants
 func GetDefaultOllamaModels() ([]*OllamaGenericText, error) {
 	models := []*OllamaGenericText{