Toby Padilla
613 lines
20 KiB
Go
613 lines
20 KiB
Go
package github
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import (
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"context"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"github.com/aws/smithy-go/ptr"
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"github.com/github/github-mcp-server/pkg/translations"
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"github.com/google/go-github/v69/github"
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"github.com/mark3labs/mcp-go/mcp"
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"github.com/mark3labs/mcp-go/server"
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)
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// listCommits creates a tool to get commits of a branch in a repository.
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func listCommits(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("list_commits",
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mcp.WithDescription(t("TOOL_LIST_COMMITS_DESCRIPTION", "Get list of commits of a branch in a GitHub repository")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("sha",
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mcp.Description("Branch name"),
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),
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mcp.WithNumber("page",
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mcp.Description("Page number"),
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),
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mcp.WithNumber("per_page",
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mcp.Description("Number of records per page"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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owner, err := requiredParam[string](request, "owner")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo, err := requiredParam[string](request, "repo")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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sha, err := optionalParam[string](request, "sha")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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page, err := optionalIntParamWithDefault(request, "page", 1)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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perPage, err := optionalIntParamWithDefault(request, "per_page", 30)
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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opts := &github.CommitsListOptions{
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SHA: sha,
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ListOptions: github.ListOptions{
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Page: page,
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PerPage: perPage,
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},
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}
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commits, resp, err := client.Repositories.ListCommits(ctx, owner, repo, opts)
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if err != nil {
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return nil, fmt.Errorf("failed to list commits: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != 200 {
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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return mcp.NewToolResultError(fmt.Sprintf("failed to list commits: %s", string(body))), nil
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}
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r, err := json.Marshal(commits)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// createOrUpdateFile creates a tool to create or update a file in a GitHub repository.
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func createOrUpdateFile(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("create_or_update_file",
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mcp.WithDescription(t("TOOL_CREATE_OR_UPDATE_FILE_DESCRIPTION", "Create or update a single file in a GitHub repository")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner (username or organization)"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("path",
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mcp.Required(),
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mcp.Description("Path where to create/update the file"),
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),
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mcp.WithString("content",
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mcp.Required(),
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mcp.Description("Content of the file"),
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),
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mcp.WithString("message",
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mcp.Required(),
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mcp.Description("Commit message"),
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),
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mcp.WithString("branch",
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mcp.Required(),
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mcp.Description("Branch to create/update the file in"),
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),
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mcp.WithString("sha",
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mcp.Description("SHA of file being replaced (for updates)"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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owner, err := requiredParam[string](request, "owner")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo, err := requiredParam[string](request, "repo")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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path, err := requiredParam[string](request, "path")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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content, err := requiredParam[string](request, "content")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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message, err := requiredParam[string](request, "message")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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branch, err := requiredParam[string](request, "branch")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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// Convert content to base64
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contentBytes := []byte(content)
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// Create the file options
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opts := &github.RepositoryContentFileOptions{
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Message: ptr.String(message),
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Content: contentBytes,
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Branch: ptr.String(branch),
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}
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// If SHA is provided, set it (for updates)
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sha, err := optionalParam[string](request, "sha")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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if sha != "" {
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opts.SHA = ptr.String(sha)
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}
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// Create or update the file
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fileContent, resp, err := client.Repositories.CreateFile(ctx, owner, repo, path, opts)
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if err != nil {
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return nil, fmt.Errorf("failed to create/update file: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != 200 && resp.StatusCode != 201 {
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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return mcp.NewToolResultError(fmt.Sprintf("failed to create/update file: %s", string(body))), nil
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}
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r, err := json.Marshal(fileContent)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// createRepository creates a tool to create a new GitHub repository.
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func createRepository(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("create_repository",
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mcp.WithDescription(t("TOOL_CREATE_REPOSITORY_DESCRIPTION", "Create a new GitHub repository in your account")),
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mcp.WithString("name",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("description",
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mcp.Description("Repository description"),
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),
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mcp.WithBoolean("private",
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mcp.Description("Whether repo should be private"),
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),
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mcp.WithBoolean("auto_init",
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mcp.Description("Initialize with README"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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name, err := requiredParam[string](request, "name")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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description, err := optionalParam[string](request, "description")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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private, err := optionalParam[bool](request, "private")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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autoInit, err := optionalParam[bool](request, "auto_init")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo := &github.Repository{
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Name: github.Ptr(name),
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Description: github.Ptr(description),
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Private: github.Ptr(private),
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AutoInit: github.Ptr(autoInit),
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}
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createdRepo, resp, err := client.Repositories.Create(ctx, "", repo)
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if err != nil {
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return nil, fmt.Errorf("failed to create repository: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusCreated {
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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return mcp.NewToolResultError(fmt.Sprintf("failed to create repository: %s", string(body))), nil
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}
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r, err := json.Marshal(createdRepo)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// getFileContents creates a tool to get the contents of a file or directory from a GitHub repository.
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func getFileContents(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("get_file_contents",
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mcp.WithDescription(t("TOOL_GET_FILE_CONTENTS_DESCRIPTION", "Get the contents of a file or directory from a GitHub repository")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner (username or organization)"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("path",
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mcp.Required(),
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mcp.Description("Path to file/directory"),
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),
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mcp.WithString("branch",
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mcp.Description("Branch to get contents from"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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owner, err := requiredParam[string](request, "owner")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo, err := requiredParam[string](request, "repo")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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path, err := requiredParam[string](request, "path")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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branch, err := optionalParam[string](request, "branch")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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opts := &github.RepositoryContentGetOptions{Ref: branch}
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fileContent, dirContent, resp, err := client.Repositories.GetContents(ctx, owner, repo, path, opts)
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if err != nil {
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return nil, fmt.Errorf("failed to get file contents: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != 200 {
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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return mcp.NewToolResultError(fmt.Sprintf("failed to get file contents: %s", string(body))), nil
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}
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var result interface{}
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if fileContent != nil {
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result = fileContent
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} else {
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result = dirContent
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}
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r, err := json.Marshal(result)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// forkRepository creates a tool to fork a repository.
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func forkRepository(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("fork_repository",
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mcp.WithDescription(t("TOOL_FORK_REPOSITORY_DESCRIPTION", "Fork a GitHub repository to your account or specified organization")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("organization",
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mcp.Description("Organization to fork to"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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owner, err := requiredParam[string](request, "owner")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo, err := requiredParam[string](request, "repo")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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org, err := optionalParam[string](request, "organization")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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opts := &github.RepositoryCreateForkOptions{}
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if org != "" {
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opts.Organization = org
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}
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forkedRepo, resp, err := client.Repositories.CreateFork(ctx, owner, repo, opts)
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if err != nil {
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// Check if it's an acceptedError. An acceptedError indicates that the update is in progress,
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// and it's not a real error.
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if resp != nil && resp.StatusCode == http.StatusAccepted && isAcceptedError(err) {
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return mcp.NewToolResultText("Fork is in progress"), nil
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}
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return nil, fmt.Errorf("failed to fork repository: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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if resp.StatusCode != http.StatusAccepted {
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body, err := io.ReadAll(resp.Body)
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if err != nil {
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return nil, fmt.Errorf("failed to read response body: %w", err)
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}
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return mcp.NewToolResultError(fmt.Sprintf("failed to fork repository: %s", string(body))), nil
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}
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r, err := json.Marshal(forkedRepo)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// createBranch creates a tool to create a new branch.
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func createBranch(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("create_branch",
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mcp.WithDescription(t("TOOL_CREATE_BRANCH_DESCRIPTION", "Create a new branch in a GitHub repository")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("branch",
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mcp.Required(),
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mcp.Description("Name for new branch"),
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),
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mcp.WithString("from_branch",
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mcp.Description("Source branch (defaults to repo default)"),
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),
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),
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func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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owner, err := requiredParam[string](request, "owner")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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repo, err := requiredParam[string](request, "repo")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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branch, err := requiredParam[string](request, "branch")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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fromBranch, err := optionalParam[string](request, "from_branch")
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if err != nil {
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return mcp.NewToolResultError(err.Error()), nil
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}
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// Get the source branch SHA
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var ref *github.Reference
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if fromBranch == "" {
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// Get default branch if from_branch not specified
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repository, resp, err := client.Repositories.Get(ctx, owner, repo)
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if err != nil {
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return nil, fmt.Errorf("failed to get repository: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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fromBranch = *repository.DefaultBranch
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}
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// Get SHA of source branch
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ref, resp, err := client.Git.GetRef(ctx, owner, repo, "refs/heads/"+fromBranch)
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if err != nil {
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return nil, fmt.Errorf("failed to get reference: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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// Create new branch
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newRef := &github.Reference{
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Ref: github.Ptr("refs/heads/" + branch),
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Object: &github.GitObject{SHA: ref.Object.SHA},
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}
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createdRef, resp, err := client.Git.CreateRef(ctx, owner, repo, newRef)
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if err != nil {
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return nil, fmt.Errorf("failed to create branch: %w", err)
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}
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defer func() { _ = resp.Body.Close() }()
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r, err := json.Marshal(createdRef)
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if err != nil {
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return nil, fmt.Errorf("failed to marshal response: %w", err)
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}
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return mcp.NewToolResultText(string(r)), nil
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}
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}
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// pushFiles creates a tool to push multiple files in a single commit to a GitHub repository.
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func pushFiles(client *github.Client, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
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return mcp.NewTool("push_files",
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mcp.WithDescription(t("TOOL_PUSH_FILES_DESCRIPTION", "Push multiple files to a GitHub repository in a single commit")),
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mcp.WithString("owner",
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mcp.Required(),
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mcp.Description("Repository owner"),
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),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name"),
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),
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mcp.WithString("branch",
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mcp.Required(),
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mcp.Description("Branch to push to"),
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),
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mcp.WithArray("files",
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mcp.Required(),
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mcp.Items(
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map[string]interface{}{
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"type": "object",
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"additionalProperties": false,
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"required": []string{"path", "content"},
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"properties": map[string]interface{}{
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"path": map[string]interface{}{
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"type": "string",
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"description": "path to the file",
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},
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"content": map[string]interface{}{
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"type": "string",
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"description": "file content",
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},
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},
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}),
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mcp.Description("Array of file objects to push, each object with path (string) and content (string)"),
|
|
),
|
|
mcp.WithString("message",
|
|
mcp.Required(),
|
|
mcp.Description("Commit message"),
|
|
),
|
|
),
|
|
func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
|
|
owner, err := requiredParam[string](request, "owner")
|
|
if err != nil {
|
|
return mcp.NewToolResultError(err.Error()), nil
|
|
}
|
|
repo, err := requiredParam[string](request, "repo")
|
|
if err != nil {
|
|
return mcp.NewToolResultError(err.Error()), nil
|
|
}
|
|
branch, err := requiredParam[string](request, "branch")
|
|
if err != nil {
|
|
return mcp.NewToolResultError(err.Error()), nil
|
|
}
|
|
message, err := requiredParam[string](request, "message")
|
|
if err != nil {
|
|
return mcp.NewToolResultError(err.Error()), nil
|
|
}
|
|
|
|
// Parse files parameter - this should be an array of objects with path and content
|
|
filesObj, ok := request.Params.Arguments["files"].([]interface{})
|
|
if !ok {
|
|
return mcp.NewToolResultError("files parameter must be an array of objects with path and content"), nil
|
|
}
|
|
|
|
// Get the reference for the branch
|
|
ref, resp, err := client.Git.GetRef(ctx, owner, repo, "refs/heads/"+branch)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get branch reference: %w", err)
|
|
}
|
|
defer func() { _ = resp.Body.Close() }()
|
|
|
|
// Get the commit object that the branch points to
|
|
baseCommit, resp, err := client.Git.GetCommit(ctx, owner, repo, *ref.Object.SHA)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to get base commit: %w", err)
|
|
}
|
|
defer func() { _ = resp.Body.Close() }()
|
|
|
|
// Create tree entries for all files
|
|
var entries []*github.TreeEntry
|
|
|
|
for _, file := range filesObj {
|
|
fileMap, ok := file.(map[string]interface{})
|
|
if !ok {
|
|
return mcp.NewToolResultError("each file must be an object with path and content"), nil
|
|
}
|
|
|
|
path, ok := fileMap["path"].(string)
|
|
if !ok || path == "" {
|
|
return mcp.NewToolResultError("each file must have a path"), nil
|
|
}
|
|
|
|
content, ok := fileMap["content"].(string)
|
|
if !ok {
|
|
return mcp.NewToolResultError("each file must have content"), nil
|
|
}
|
|
|
|
// Create a tree entry for the file
|
|
entries = append(entries, &github.TreeEntry{
|
|
Path: github.Ptr(path),
|
|
Mode: github.Ptr("100644"), // Regular file mode
|
|
Type: github.Ptr("blob"),
|
|
Content: github.Ptr(content),
|
|
})
|
|
}
|
|
|
|
// Create a new tree with the file entries
|
|
newTree, resp, err := client.Git.CreateTree(ctx, owner, repo, *baseCommit.Tree.SHA, entries)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create tree: %w", err)
|
|
}
|
|
defer func() { _ = resp.Body.Close() }()
|
|
|
|
// Create a new commit
|
|
commit := &github.Commit{
|
|
Message: github.Ptr(message),
|
|
Tree: newTree,
|
|
Parents: []*github.Commit{{SHA: baseCommit.SHA}},
|
|
}
|
|
newCommit, resp, err := client.Git.CreateCommit(ctx, owner, repo, commit, nil)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to create commit: %w", err)
|
|
}
|
|
defer func() { _ = resp.Body.Close() }()
|
|
|
|
// Update the reference to point to the new commit
|
|
ref.Object.SHA = newCommit.SHA
|
|
updatedRef, resp, err := client.Git.UpdateRef(ctx, owner, repo, ref, false)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to update reference: %w", err)
|
|
}
|
|
defer func() { _ = resp.Body.Close() }()
|
|
|
|
r, err := json.Marshal(updatedRef)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to marshal response: %w", err)
|
|
}
|
|
|
|
return mcp.NewToolResultText(string(r)), nil
|
|
}
|
|
}
|