feat(tools/dataform): add dataform compile tool (googleapis#1470)

## Description

This change introduces a new tool for compiling local Dataform projects.

The new tool, `dataform-compile`, allows users to programmatically run
the `dataform compile` command against a project on the local
filesystem. This tool does not require a `source` and instead relies on
the `dataform` CLI being available in the server's `PATH`.

### Changes:
* Added the new tool definition in
`internal/tools/dataformcompile/dataformcompile.go`.
* The tool requires the following parameter:
    * `project_dir`: The local Dataform project directory to compile.
* The tool uses `os/exec` to run the `dataform compile --json` command
and parses the resulting JSON output.
* Added a new integration test in
`internal/tools/dataformcompile/dataformcompile_test.go` which:
    * Skips the test if the `dataform` CLI is not found in the `PATH`.
* Uses `dataform init` to create a temporary, minimal project for
testing.
* Verifies success, missing parameter errors, and errors from a
non-existent directory.
---
> Should include a concise description of the changes (bug or feature),
it's
> impact, along with a summary of the solution

## PR Checklist

---
> Thank you for opening a Pull Request! Before submitting your PR, there
are a
> few things you can do to make sure it goes smoothly:

- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [x] Appropriate docs were updated (if necessary)
- [x] Make sure to add `!` if this involve a breaking change

🛠️ Fixes googleapis#1469

---------

Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>

Author: saurabh-net

.ci/integration.cloudbuild.yaml

@@ -194,6 +194,26 @@ steps:
           dataplex \
           dataplex
 
+  - id: "dataform"
+    name: golang:1
+    waitFor: ["compile-test-binary"]
+    entrypoint: /bin/bash
+    env:
+      - "GOPATH=/gopath"
+    secretEnv: ["CLIENT_ID"]
+    volumes:
+      - name: "go"
+        path: "/gopath"
+    args:
+      - -c
+      - |
+        apt-get update && apt-get install -y npm && \
+        npm install -g @dataform/cli && \
+        .ci/test_with_coverage.sh \
+          "Dataform" \
+          dataform \
+          dataform
+
   - id: "postgres"
     name: golang:1
     waitFor: ["compile-test-binary"]

cmd/root.go

@@ -80,6 +80,7 @@ import (
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsqlmysql/cloudsqlmysqlcreateinstance"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/cloudsqlpg/cloudsqlpgcreateinstances"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/couchbase"
+	_ "github.com/googleapis/genai-toolbox/internal/tools/dataform/dataformcompilelocal"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/dataplex/dataplexlookupentry"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/dataplex/dataplexsearchaspecttypes"
 	_ "github.com/googleapis/genai-toolbox/internal/tools/dataplex/dataplexsearchentries"

docs/en/resources/tools/dataform/_index.md

@@ -0,0 +1,7 @@
+---
+title: "Dataform"
+type: docs
+weight: 1
+description: > 
+  Tools that work with Dataform.
+---

docs/en/resources/tools/dataform/dataform-compile-local.md

@@ -0,0 +1,48 @@
+---
+title: "dataform-compile-local"
+type: docs
+weight: 1
+description: > 
+  A "dataform-compile-local" tool runs the `dataform compile` CLI command on a local project directory.
+aliases:
+- /resources/tools/dataform-compile-local
+---
+
+## About
+
+A `dataform-compile-local` tool runs the `dataform compile` command on a local Dataform project.
+
+It is a standalone tool and **is not** compatible with any sources.
+
+At invocation time, the tool executes `dataform compile --json` in the specified project directory and returns the resulting JSON object from the CLI.
+
+`dataform-compile-local` takes the following parameter: 
+- `project_dir` (string): The absolute or relative path to the local Dataform project directory. The server process must have read access to this path.
+
+## Requirements
+
+### Dataform CLI
+
+This tool executes the `dataform` command-line interface (CLI) via a system call. You must have the **`dataform` CLI** installed and available in the server's system `PATH`.
+
+You can typically install the CLI via `npm`:
+```bash
+npm install -g @dataform/cli
+```
+
+See the [official Dataform documentation](https://www.google.com/search?q=https://cloud.google.com/dataform/docs/install-dataform-cli) for more details.
+
+## Example
+
+```yaml
+tools:  
+  my_dataform_compiler:  
+    kind: dataform-compile-local  
+    description: Use this tool to compile a local Dataform project.
+```
+
+## Reference
+| **field** | **type** | **required** | **description** |
+| :---- | :---- | :---- | :---- |
+| kind | string | true | Must be "dataform-compile-local". |
+| description | string | true | Description of the tool that is passed to the LLM. |

internal/tools/dataform/dataformcompilelocal/dataformcompilelocal.go

@@ -0,0 +1,122 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dataformcompilelocal
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+	"strings"
+
+	"github.com/goccy/go-yaml"
+	"github.com/googleapis/genai-toolbox/internal/sources"
+	"github.com/googleapis/genai-toolbox/internal/tools"
+)
+
+const kind string = "dataform-compile-local"
+
+func init() {
+	if !tools.Register(kind, newConfig) {
+		panic(fmt.Sprintf("tool kind %q already registered", kind))
+	}
+}
+
+func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (tools.ToolConfig, error) {
+	actual := Config{Name: name}
+	if err := decoder.DecodeContext(ctx, &actual); err != nil {
+		return nil, err
+	}
+	return actual, nil
+}
+
+type Config struct {
+	Name         string   `yaml:"name" validate:"required"`
+	Kind         string   `yaml:"kind" validate:"required"`
+	Description  string   `yaml:"description" validate:"required"`
+	AuthRequired []string `yaml:"authRequired"`
+}
+
+var _ tools.ToolConfig = Config{}
+
+func (cfg Config) ToolConfigKind() string {
+	return kind
+}
+
+func (cfg Config) Initialize(srcs map[string]sources.Source) (tools.Tool, error) {
+	allParameters := tools.Parameters{
+		tools.NewStringParameter("project_dir", "The Dataform project directory."),
+	}
+	paramManifest := allParameters.Manifest()
+	mcpManifest := tools.GetMcpManifest(cfg.Name, cfg.Description, cfg.AuthRequired, allParameters)
+
+	t := Tool{
+		Name:         cfg.Name,
+		Kind:         kind,
+		AuthRequired: cfg.AuthRequired,
+		Parameters:   allParameters,
+		manifest:     tools.Manifest{Description: cfg.Description, Parameters: paramManifest, AuthRequired: cfg.AuthRequired},
+		mcpManifest:  mcpManifest,
+	}
+
+	return t, nil
+}
+
+var _ tools.Tool = Tool{}
+
+type Tool struct {
+	Name         string           `yaml:"name"`
+	Kind         string           `yaml:"kind"`
+	AuthRequired []string         `yaml:"authRequired"`
+	Parameters   tools.Parameters `yaml:"allParams"`
+	manifest     tools.Manifest
+	mcpManifest  tools.McpManifest
+}
+
+func (t Tool) Invoke(ctx context.Context, params tools.ParamValues, accessToken tools.AccessToken) (any, error) {
+	paramsMap := params.AsMap()
+
+	projectDir, ok := paramsMap["project_dir"].(string)
+	if !ok || projectDir == "" {
+		return nil, fmt.Errorf("error casting 'project_dir' to string or invalid value")
+	}
+
+	cmd := exec.CommandContext(ctx, "dataform", "compile", projectDir, "--json")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return nil, fmt.Errorf("error executing dataform compile: %w\nOutput: %s", err, string(output))
+	}
+
+	return strings.TrimSpace(string(output)), nil
+}
+
+func (t Tool) ParseParams(data map[string]any, claims map[string]map[string]any) (tools.ParamValues, error) {
+	return tools.ParseParams(t.Parameters, data, claims)
+}
+
+func (t Tool) Manifest() tools.Manifest {
+	return t.manifest
+}
+
+func (t Tool) McpManifest() tools.McpManifest {
+	return t.mcpManifest
+}
+
+func (t Tool) Authorized(verifiedAuthServices []string) bool {
+	return tools.IsAuthorized(t.AuthRequired, verifiedAuthServices)
+}
+
+func (t Tool) RequiresClientAuthorization() bool {
+	return false
+}

internal/tools/dataform/dataformcompilelocal/dataformcompilelocal_test.go

@@ -0,0 +1,71 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dataformcompilelocal_test
+
+import (
+	"testing"
+
+	yaml "github.com/goccy/go-yaml"
+	"github.com/google/go-cmp/cmp"
+	"github.com/googleapis/genai-toolbox/internal/server"
+	"github.com/googleapis/genai-toolbox/internal/testutils"
+	"github.com/googleapis/genai-toolbox/internal/tools/dataform/dataformcompilelocal"
+)
+
+func TestParseFromYamlDataformCompile(t *testing.T) {
+	ctx, err := testutils.ContextWithNewLogger()
+	if err != nil {
+		t.Fatalf("unexpected error: %s", err)
+	}
+	tcs := []struct {
+		desc string
+		in   string
+		want server.ToolConfigs
+	}{
+		{
+			desc: "basic example",
+			in: `
+			tools:
+				example_tool:
+					kind: dataform-compile-local
+					description: some description
+			`,
+			want: server.ToolConfigs{
+				"example_tool": dataformcompilelocal.Config{
+					Name:         "example_tool",
+					Kind:         "dataform-compile-local",
+					Description:  "some description",
+					AuthRequired: []string{},
+				},
+			},
+		},
+	}
+	for _, tc := range tcs {
+		t.Run(tc.desc, func(t *testing.T) {
+			got := struct {
+				Tools server.ToolConfigs `yaml:"tools"`
+			}{}
+			// Parse contents
+			err := yaml.UnmarshalContext(ctx, testutils.FormatYaml(tc.in), &got)
+			if err != nil {
+				t.Fatalf("unable to unmarshal: %s", err)
+			}
+			if diff := cmp.Diff(tc.want, got.Tools); diff != "" {
+				t.Fatalf("incorrect parse: diff %v", diff)
+			}
+		})
+	}
+
+}