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package github
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
ghErrors "github.com/github/github-mcp-server/pkg/errors"
"github.com/github/github-mcp-server/pkg/inventory"
"github.com/github/github-mcp-server/pkg/scopes"
"github.com/github/github-mcp-server/pkg/translations"
"github.com/github/github-mcp-server/pkg/utils"
"github.com/google/go-github/v82/github"
"github.com/google/jsonschema-go/jsonschema"
"github.com/modelcontextprotocol/go-sdk/mcp"
)
// SearchRepositories creates a tool to search for GitHub repositories.
func SearchRepositories(t translations.TranslationHelperFunc) inventory.ServerTool {
schema := &jsonschema.Schema{
Type: "object",
Properties: map[string]*jsonschema.Schema{
"query": {
Type: "string",
Description: "Repository search query. Examples: 'machine learning in:name stars:>1000 language:python', 'topic:react', 'user:facebook'. Supports advanced search syntax for precise filtering.",
},
"sort": {
Type: "string",
Description: "Sort repositories by field, defaults to best match",
Enum: []any{"stars", "forks", "help-wanted-issues", "updated"},
},
"order": {
Type: "string",
Description: "Sort order",
Enum: []any{"asc", "desc"},
},
"minimal_output": {
Type: "boolean",
Description: "Return minimal repository information (default: true). When false, returns full GitHub API repository objects.",
Default: json.RawMessage(`true`),
},
},
Required: []string{"query"},
}
WithPagination(schema)
return NewTool(
ToolsetMetadataRepos,
mcp.Tool{
Name: "search_repositories",
Description: t("TOOL_SEARCH_REPOSITORIES_DESCRIPTION", "Find GitHub repositories by name, description, readme, topics, or other metadata. Perfect for discovering projects, finding examples, or locating specific repositories across GitHub."),
Annotations: &mcp.ToolAnnotations{
Title: t("TOOL_SEARCH_REPOSITORIES_USER_TITLE", "Search repositories"),
ReadOnlyHint: true,
},
InputSchema: schema,
},
[]scopes.Scope{scopes.Repo},
func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {
query, err := RequiredParam[string](args, "query")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
sort, err := OptionalParam[string](args, "sort")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
order, err := OptionalParam[string](args, "order")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
pagination, err := OptionalPaginationParams(args)
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
minimalOutput, err := OptionalBoolParamWithDefault(args, "minimal_output", true)
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
opts := &github.SearchOptions{
Sort: sort,
Order: order,
ListOptions: github.ListOptions{
Page: pagination.Page,
PerPage: pagination.PerPage,
},
}
client, err := deps.GetClient(ctx)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to get GitHub client", err), nil, nil
}
result, resp, err := client.Search.Repositories(ctx, query, opts)
if err != nil {
return ghErrors.NewGitHubAPIErrorResponse(ctx,
fmt.Sprintf("failed to search repositories with query '%s'", query),
resp,
err,
), nil, nil
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
body, err := io.ReadAll(resp.Body)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to read response body", err), nil, nil
}
return ghErrors.NewGitHubAPIStatusErrorResponse(ctx, "failed to search repositories", resp, body), nil, nil
}
// Return either minimal or full response based on parameter
var r []byte
if minimalOutput {
minimalRepos := make([]MinimalRepository, 0, len(result.Repositories))
for _, repo := range result.Repositories {
minimalRepo := MinimalRepository{
ID: repo.GetID(),
Name: repo.GetName(),
FullName: repo.GetFullName(),
Description: repo.GetDescription(),
HTMLURL: repo.GetHTMLURL(),
Language: repo.GetLanguage(),
Stars: repo.GetStargazersCount(),
Forks: repo.GetForksCount(),
OpenIssues: repo.GetOpenIssuesCount(),
Private: repo.GetPrivate(),
Fork: repo.GetFork(),
Archived: repo.GetArchived(),
DefaultBranch: repo.GetDefaultBranch(),
}
if repo.UpdatedAt != nil {
minimalRepo.UpdatedAt = repo.UpdatedAt.Format("2006-01-02T15:04:05Z")
}
if repo.CreatedAt != nil {
minimalRepo.CreatedAt = repo.CreatedAt.Format("2006-01-02T15:04:05Z")
}
if repo.Topics != nil {
minimalRepo.Topics = repo.Topics
}
minimalRepos = append(minimalRepos, minimalRepo)
}
minimalResult := &MinimalSearchRepositoriesResult{
TotalCount: result.GetTotal(),
IncompleteResults: result.GetIncompleteResults(),
Items: minimalRepos,
}
r, err = json.Marshal(minimalResult)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to marshal minimal response", err), nil, nil
}
} else {
r, err = json.Marshal(result)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to marshal full response", err), nil, nil
}
}
return utils.NewToolResultText(string(r)), nil, nil
},
)
}
// SearchCode creates a tool to search for code across GitHub repositories.
func SearchCode(t translations.TranslationHelperFunc) inventory.ServerTool {
schema := &jsonschema.Schema{
Type: "object",
Properties: map[string]*jsonschema.Schema{
"query": {
Type: "string",
Description: "Search query using GitHub's powerful code search syntax. Examples: 'content:Skill language:Java org:github', 'NOT is:archived language:Python OR language:go', 'repo:github/github-mcp-server'. Supports exact matching, language filters, path filters, and more.",
},
"sort": {
Type: "string",
Description: "Sort field ('indexed' only)",
},
"order": {
Type: "string",
Description: "Sort order for results",
Enum: []any{"asc", "desc"},
},
},
Required: []string{"query"},
}
WithPagination(schema)
return NewTool(
ToolsetMetadataRepos,
mcp.Tool{
Name: "search_code",
Description: t("TOOL_SEARCH_CODE_DESCRIPTION", "Fast and precise code search across ALL GitHub repositories using GitHub's native search engine. Best for finding exact symbols, functions, classes, or specific code patterns."),
Annotations: &mcp.ToolAnnotations{
Title: t("TOOL_SEARCH_CODE_USER_TITLE", "Search code"),
ReadOnlyHint: true,
},
InputSchema: schema,
},
[]scopes.Scope{scopes.Repo},
func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {
query, err := RequiredParam[string](args, "query")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
sort, err := OptionalParam[string](args, "sort")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
order, err := OptionalParam[string](args, "order")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
pagination, err := OptionalPaginationParams(args)
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
opts := &github.SearchOptions{
Sort: sort,
Order: order,
ListOptions: github.ListOptions{
PerPage: pagination.PerPage,
Page: pagination.Page,
},
}
client, err := deps.GetClient(ctx)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to get GitHub client", err), nil, nil
}
result, resp, err := client.Search.Code(ctx, query, opts)
if err != nil {
return ghErrors.NewGitHubAPIErrorResponse(ctx,
fmt.Sprintf("failed to search code with query '%s'", query),
resp,
err,
), nil, nil
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
body, err := io.ReadAll(resp.Body)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to read response body", err), nil, nil
}
return ghErrors.NewGitHubAPIStatusErrorResponse(ctx, "failed to search code", resp, body), nil, nil
}
r, err := json.Marshal(result)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to marshal response", err), nil, nil
}
return utils.NewToolResultText(string(r)), nil, nil
},
)
}
func userOrOrgHandler(ctx context.Context, accountType string, deps ToolDependencies, args map[string]any) (*mcp.CallToolResult, any, error) {
query, err := RequiredParam[string](args, "query")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
sort, err := OptionalParam[string](args, "sort")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
order, err := OptionalParam[string](args, "order")
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
pagination, err := OptionalPaginationParams(args)
if err != nil {
return utils.NewToolResultError(err.Error()), nil, nil
}
opts := &github.SearchOptions{
Sort: sort,
Order: order,
ListOptions: github.ListOptions{
PerPage: pagination.PerPage,
Page: pagination.Page,
},
}
client, err := deps.GetClient(ctx)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to get GitHub client", err), nil, nil
}
searchQuery := query
if !hasTypeFilter(query) {
searchQuery = "type:" + accountType + " " + query
}
result, resp, err := client.Search.Users(ctx, searchQuery, opts)
if err != nil {
return ghErrors.NewGitHubAPIErrorResponse(ctx,
fmt.Sprintf("failed to search %ss with query '%s'", accountType, query),
resp,
err,
), nil, nil
}
defer func() { _ = resp.Body.Close() }()
if resp.StatusCode != http.StatusOK {
body, err := io.ReadAll(resp.Body)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to read response body", err), nil, nil
}
return ghErrors.NewGitHubAPIStatusErrorResponse(ctx, fmt.Sprintf("failed to search %ss", accountType), resp, body), nil, nil
}
minimalUsers := make([]MinimalUser, 0, len(result.Users))
for _, user := range result.Users {
if user.Login != nil {
mu := MinimalUser{
Login: user.GetLogin(),
ID: user.GetID(),
ProfileURL: user.GetHTMLURL(),
AvatarURL: user.GetAvatarURL(),
}
minimalUsers = append(minimalUsers, mu)
}
}
minimalResp := &MinimalSearchUsersResult{
TotalCount: result.GetTotal(),
IncompleteResults: result.GetIncompleteResults(),
Items: minimalUsers,
}
if result.Total != nil {
minimalResp.TotalCount = *result.Total
}
if result.IncompleteResults != nil {
minimalResp.IncompleteResults = *result.IncompleteResults
}
r, err := json.Marshal(minimalResp)
if err != nil {
return utils.NewToolResultErrorFromErr("failed to marshal response", err), nil, nil
}
return utils.NewToolResultText(string(r)), nil, nil
}
// SearchUsers creates a tool to search for GitHub users.
func SearchUsers(t translations.TranslationHelperFunc) inventory.ServerTool {
schema := &jsonschema.Schema{
Type: "object",
Properties: map[string]*jsonschema.Schema{
"query": {
Type: "string",
Description: "User search query. Examples: 'john smith', 'location:seattle', 'followers:>100'. Search is automatically scoped to type:user.",
},
"sort": {
Type: "string",
Description: "Sort users by number of followers or repositories, or when the person joined GitHub.",
Enum: []any{"followers", "repositories", "joined"},
},
"order": {
Type: "string",
Description: "Sort order",
Enum: []any{"asc", "desc"},
},
},
Required: []string{"query"},
}
WithPagination(schema)
return NewTool(
ToolsetMetadataUsers,
mcp.Tool{
Name: "search_users",
Description: t("TOOL_SEARCH_USERS_DESCRIPTION", "Find GitHub users by username, real name, or other profile information. Useful for locating developers, contributors, or team members."),
Annotations: &mcp.ToolAnnotations{
Title: t("TOOL_SEARCH_USERS_USER_TITLE", "Search users"),
ReadOnlyHint: true,
},
InputSchema: schema,
},
[]scopes.Scope{scopes.Repo},
func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {
return userOrOrgHandler(ctx, "user", deps, args)
},
)
}
// SearchOrgs creates a tool to search for GitHub organizations.
func SearchOrgs(t translations.TranslationHelperFunc) inventory.ServerTool {
schema := &jsonschema.Schema{
Type: "object",
Properties: map[string]*jsonschema.Schema{
"query": {
Type: "string",
Description: "Organization search query. Examples: 'microsoft', 'location:california', 'created:>=2025-01-01'. Search is automatically scoped to type:org.",
},
"sort": {
Type: "string",
Description: "Sort field by category",
Enum: []any{"followers", "repositories", "joined"},
},
"order": {
Type: "string",
Description: "Sort order",
Enum: []any{"asc", "desc"},
},
},
Required: []string{"query"},
}
WithPagination(schema)
return NewTool(
ToolsetMetadataOrgs,
mcp.Tool{
Name: "search_orgs",
Description: t("TOOL_SEARCH_ORGS_DESCRIPTION", "Find GitHub organizations by name, location, or other organization metadata. Ideal for discovering companies, open source foundations, or teams."),
Annotations: &mcp.ToolAnnotations{
Title: t("TOOL_SEARCH_ORGS_USER_TITLE", "Search organizations"),
ReadOnlyHint: true,
},
InputSchema: schema,
},
[]scopes.Scope{scopes.ReadOrg},
func(ctx context.Context, deps ToolDependencies, _ *mcp.CallToolRequest, args map[string]any) (*mcp.CallToolResult, any, error) {
return userOrOrgHandler(ctx, "org", deps, args)
},
)
}