change: rewrite gemini-vertex-model-provider in Go

gemini-vertex-model-provider/go.mod

@@ -0,0 +1,16 @@
+module github.com/obot-platform/tools/gemini-vertex-model-provider
+
+go 1.23.4
+
+require (
+	github.com/gptscript-ai/chat-completion-client v0.0.0-20241219123536-85c44096bc10
+	golang.org/x/oauth2 v0.23.0
+	google.golang.org/genai v0.0.0-20250107232730-7bfd6e5a3ff7
+)
+
+require (
+	cloud.google.com/go v0.116.0 // indirect
+	cloud.google.com/go/compute/metadata v0.5.0 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+)

gemini-vertex-model-provider/go.sum

@@ -0,0 +1,14 @@
+cloud.google.com/go v0.116.0 h1:B3fRrSDkLRt5qSHWe40ERJvhvnQwdZiHu0bJOpldweE=
+cloud.google.com/go v0.116.0/go.mod h1:cEPSRWPzZEswwdr9BxE6ChEn01dWlTaF05LiC2Xs70U=
+cloud.google.com/go/compute/metadata v0.5.0 h1:Zr0eK8JbFv6+Wi4ilXAR8FJ3wyNdpxHKJNPos6LTZOY=
+cloud.google.com/go/compute/metadata v0.5.0/go.mod h1:aHnloV2TPI38yx4s9+wAZhHykWvVCfu7hQbF+9CWoiY=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/gptscript-ai/chat-completion-client v0.0.0-20241219123536-85c44096bc10 h1:v251qdhjAE+mCi3s+ekmGbqV9BurrMTl0Vd8/0MvsTY=
+github.com/gptscript-ai/chat-completion-client v0.0.0-20241219123536-85c44096bc10/go.mod h1:7P/o6/IWa1KqsntVf68hSnLKuu3+xuqm6lYhch1w4jo=
+golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
+golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+google.golang.org/genai v0.0.0-20250107232730-7bfd6e5a3ff7 h1:sGAkRQ7mZxfaV5S6gK/E8UU0ULMKGUuYkzlGcSXjGl4=
+google.golang.org/genai v0.0.0-20250107232730-7bfd6e5a3ff7/go.mod h1:oOXmTgRmvfizGLLCWeqvGyKJjDluaibHnZdFIZEob0k=

gemini-vertex-model-provider/main.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/obot-platform/tools/gemini-vertex-model-provider/server"
+	"golang.org/x/oauth2/google"
+	"google.golang.org/genai"
+)
+
+func main() {
+	ctx := context.Background()
+
+	args := os.Args[1:]
+	if len(args) == 1 && args[0] == "validate" {
+		if err := validate(ctx); err != nil {
+			fmt.Printf("{\"error\": \"%s\"}\n", err)
+		}
+		os.Exit(0)
+	}
+
+	c, err := configure(ctx)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8000"
+	}
+
+	if err := server.Run(c, port); err != nil {
+		panic(err)
+	}
+}
+
+func validate(ctx context.Context) error {
+	_, err := configure(ctx)
+	return err
+}
+
+func configure(ctx context.Context) (*genai.Client, error) {
+
+	// Ensure that we have some valid credentials JSON data
+	credsJSON := os.Getenv("OBOT_GEMINI_VERTEX_MODEL_PROVIDER_GOOGLE_CREDENTIALS_JSON")
+	if credsJSON == "" {
+		return nil, fmt.Errorf("google application credentials content is required")
+	}
+
+	var creds map[string]any
+	if err := json.Unmarshal([]byte(credsJSON), &creds); err != nil {
+		return nil, fmt.Errorf("failed to parse google application credentials json: %w", err)
+	}
+
+	gcreds, err := google.CredentialsFromJSON(ctx, []byte(credsJSON))
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse google credentials JSON: %w", err)
+	}
+
+	// Ensure that we have a Project ID set
+	var pid string
+	if p, ok := creds["project_id"]; ok {
+		pid = p.(string)
+	} else {
+		pid = os.Getenv("OBOT_GEMINI_VERTEX_MODEL_PROVIDER_GOOGLE_CLOUD_PROJECT")
+	}
+	if pid == "" {
+		return nil, fmt.Errorf("google cloud project id is required")
+	}
+
+	// Ensure that we have a Location set
+	var loc string
+	if l, ok := creds["location"]; ok {
+		loc = l.(string)
+	} else {
+		pid = os.Getenv("OBOT_GEMINI_VERTEX_MODEL_PROVIDER_GOOGLE_CLOUD_LOCATION")
+	}
+	if loc == "" {
+		return nil, fmt.Errorf("google cloud location is required")
+	}
+
+	cc := &genai.ClientConfig{
+		Backend:     genai.BackendVertexAI,
+		Credentials: gcreds,
+		Project:     pid,
+		Location:    loc,
+	}
+
+	client, err := genai.NewClient(ctx, cc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create genai client: %w", err)
+	}
+
+	return client, nil
+}