-
Notifications
You must be signed in to change notification settings - Fork 4.1k
Expand file tree
/
Copy pathrepository_resource.go
More file actions
311 lines (278 loc) · 11 KB
/
repository_resource.go
File metadata and controls
311 lines (278 loc) · 11 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
package github
import (
"bytes"
"context"
"encoding/base64"
"errors"
"fmt"
"io"
"mime"
"net/http"
"path/filepath"
"strconv"
"strings"
"github.com/github/github-mcp-server/pkg/inventory"
"github.com/github/github-mcp-server/pkg/octicons"
"github.com/github/github-mcp-server/pkg/raw"
"github.com/github/github-mcp-server/pkg/translations"
"github.com/google/go-github/v82/github"
"github.com/modelcontextprotocol/go-sdk/mcp"
"github.com/yosida95/uritemplate/v3"
)
var (
repositoryResourceContentURITemplate = uritemplate.MustNew("repo://{owner}/{repo}/contents{/path*}")
repositoryResourceBranchContentURITemplate = uritemplate.MustNew("repo://{owner}/{repo}/refs/heads/{branch}/contents{/path*}")
repositoryResourceCommitContentURITemplate = uritemplate.MustNew("repo://{owner}/{repo}/sha/{sha}/contents{/path*}")
repositoryResourceTagContentURITemplate = uritemplate.MustNew("repo://{owner}/{repo}/refs/tags/{tag}/contents{/path*}")
repositoryResourcePrContentURITemplate = uritemplate.MustNew("repo://{owner}/{repo}/refs/pull/{prNumber}/head/contents{/path*}")
)
// GetRepositoryResourceContent defines the resource template for getting repository content.
func GetRepositoryResourceContent(t translations.TranslationHelperFunc) inventory.ServerResourceTemplate {
return inventory.NewServerResourceTemplate(
ToolsetMetadataRepos,
mcp.ResourceTemplate{
Name: "repository_content",
URITemplate: repositoryResourceContentURITemplate.Raw(),
Description: t("RESOURCE_REPOSITORY_CONTENT_DESCRIPTION", "Repository Content"),
Icons: octicons.Icons("repo"),
},
repositoryResourceContentsHandlerFunc(repositoryResourceContentURITemplate),
)
}
// GetRepositoryResourceBranchContent defines the resource template for getting repository content for a branch.
func GetRepositoryResourceBranchContent(t translations.TranslationHelperFunc) inventory.ServerResourceTemplate {
return inventory.NewServerResourceTemplate(
ToolsetMetadataRepos,
mcp.ResourceTemplate{
Name: "repository_content_branch",
URITemplate: repositoryResourceBranchContentURITemplate.Raw(),
Description: t("RESOURCE_REPOSITORY_CONTENT_BRANCH_DESCRIPTION", "Repository Content for specific branch"),
Icons: octicons.Icons("git-branch"),
},
repositoryResourceContentsHandlerFunc(repositoryResourceBranchContentURITemplate),
)
}
// GetRepositoryResourceCommitContent defines the resource template for getting repository content for a commit.
func GetRepositoryResourceCommitContent(t translations.TranslationHelperFunc) inventory.ServerResourceTemplate {
return inventory.NewServerResourceTemplate(
ToolsetMetadataRepos,
mcp.ResourceTemplate{
Name: "repository_content_commit",
URITemplate: repositoryResourceCommitContentURITemplate.Raw(),
Description: t("RESOURCE_REPOSITORY_CONTENT_COMMIT_DESCRIPTION", "Repository Content for specific commit"),
Icons: octicons.Icons("git-commit"),
},
repositoryResourceContentsHandlerFunc(repositoryResourceCommitContentURITemplate),
)
}
// GetRepositoryResourceTagContent defines the resource template for getting repository content for a tag.
func GetRepositoryResourceTagContent(t translations.TranslationHelperFunc) inventory.ServerResourceTemplate {
return inventory.NewServerResourceTemplate(
ToolsetMetadataRepos,
mcp.ResourceTemplate{
Name: "repository_content_tag",
URITemplate: repositoryResourceTagContentURITemplate.Raw(),
Description: t("RESOURCE_REPOSITORY_CONTENT_TAG_DESCRIPTION", "Repository Content for specific tag"),
Icons: octicons.Icons("tag"),
},
repositoryResourceContentsHandlerFunc(repositoryResourceTagContentURITemplate),
)
}
// GetRepositoryResourcePrContent defines the resource template for getting repository content for a pull request.
func GetRepositoryResourcePrContent(t translations.TranslationHelperFunc) inventory.ServerResourceTemplate {
return inventory.NewServerResourceTemplate(
ToolsetMetadataRepos,
mcp.ResourceTemplate{
Name: "repository_content_pr",
URITemplate: repositoryResourcePrContentURITemplate.Raw(),
Description: t("RESOURCE_REPOSITORY_CONTENT_PR_DESCRIPTION", "Repository Content for specific pull request"),
Icons: octicons.Icons("git-pull-request"),
},
repositoryResourceContentsHandlerFunc(repositoryResourcePrContentURITemplate),
)
}
// repositoryResourceContentsHandlerFunc returns a ResourceHandlerFunc that creates handlers on-demand.
func repositoryResourceContentsHandlerFunc(resourceURITemplate *uritemplate.Template) inventory.ResourceHandlerFunc {
return func(_ any) mcp.ResourceHandler {
return RepositoryResourceContentsHandler(resourceURITemplate)
}
}
// RepositoryResourceContentsHandler returns a handler function for repository content requests.
// It retrieves ToolDependencies from the context at call time via MustDepsFromContext.
func RepositoryResourceContentsHandler(resourceURITemplate *uritemplate.Template) mcp.ResourceHandler {
return func(ctx context.Context, request *mcp.ReadResourceRequest) (*mcp.ReadResourceResult, error) {
deps := MustDepsFromContext(ctx)
// Match the URI to extract parameters
uriValues := resourceURITemplate.Match(request.Params.URI)
if uriValues == nil {
return nil, fmt.Errorf("failed to match URI: %s", request.Params.URI)
}
// Extract required vars
owner := uriValues.Get("owner").String()
repo := uriValues.Get("repo").String()
if owner == "" {
return nil, errors.New("owner is required")
}
if repo == "" {
return nil, errors.New("repo is required")
}
pathValue := uriValues.Get("path")
pathComponents := pathValue.List()
var path string
if len(pathComponents) == 0 {
path = pathValue.String()
} else {
path = strings.Join(pathComponents, "/")
}
opts := &github.RepositoryContentGetOptions{}
rawOpts := &raw.ContentOpts{}
sha := uriValues.Get("sha").String()
if sha != "" {
opts.Ref = sha
rawOpts.SHA = sha
}
branch := uriValues.Get("branch").String()
if branch != "" {
opts.Ref = "refs/heads/" + branch
rawOpts.Ref = "refs/heads/" + branch
}
tag := uriValues.Get("tag").String()
if tag != "" {
opts.Ref = "refs/tags/" + tag
rawOpts.Ref = "refs/tags/" + tag
}
prNumber := uriValues.Get("prNumber").String()
if prNumber != "" {
// fetch the PR from the API to get the latest commit and use SHA
githubClient, err := deps.GetClient(ctx)
if err != nil {
return nil, fmt.Errorf("failed to get GitHub client: %w", err)
}
prNum, err := strconv.Atoi(prNumber)
if err != nil {
return nil, fmt.Errorf("invalid pull request number: %w", err)
}
pr, _, err := githubClient.PullRequests.Get(ctx, owner, repo, prNum)
if err != nil {
return nil, fmt.Errorf("failed to get pull request: %w", err)
}
sha := pr.GetHead().GetSHA()
rawOpts.SHA = sha
opts.Ref = sha
}
// if it's a directory
if path == "" || strings.HasSuffix(path, "/") {
return nil, fmt.Errorf("directories are not supported: %s", path)
}
rawClient, err := deps.GetRawClient(ctx)
if err != nil {
return nil, fmt.Errorf("failed to get GitHub raw content client: %w", err)
}
resp, err := rawClient.GetRawContent(ctx, owner, repo, path, rawOpts)
if err != nil {
return nil, fmt.Errorf("failed to get raw content: %w", err)
}
defer func() {
_ = resp.Body.Close()
}()
// If the raw content is not found, we will fall back to the GitHub API (in case it is a directory)
switch {
case resp.StatusCode == http.StatusOK:
ext := filepath.Ext(path)
mimeType := resp.Header.Get("Content-Type")
if ext == ".md" {
mimeType = "text/markdown"
} else if mimeType == "" {
mimeType = mime.TypeByExtension(ext)
}
content, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("failed to read file content: %w", err)
}
switch {
case strings.HasPrefix(mimeType, "text"), strings.HasPrefix(mimeType, "application"):
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: request.Params.URI,
MIMEType: mimeType,
Text: string(content),
},
},
}, nil
default:
var buf bytes.Buffer
base64Encoder := base64.NewEncoder(base64.StdEncoding, &buf)
_, err := base64Encoder.Write(content)
if err != nil {
return nil, fmt.Errorf("failed to base64 encode content: %w", err)
}
if err := base64Encoder.Close(); err != nil {
return nil, fmt.Errorf("failed to close base64 encoder: %w", err)
}
return &mcp.ReadResourceResult{
Contents: []*mcp.ResourceContents{
{
URI: request.Params.URI,
MIMEType: mimeType,
Blob: buf.Bytes(),
},
},
}, nil
}
case resp.StatusCode != http.StatusNotFound:
// If we got a response but it is not 200 OK, we return an error
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("failed to read response body: %w", err)
}
return nil, fmt.Errorf("failed to fetch raw content: %s", string(body))
default:
// This should be unreachable because GetContents should return an error if neither file nor directory content is found.
return nil, errors.New("404 Not Found")
}
}
}
// expandRepoResourceURI builds a resource URI using the appropriate URI template
// based on the provided parameters (sha, ref, or default).
func expandRepoResourceURI(owner, repo, sha, ref string, pathParts []string) (string, error) {
baseValues := uritemplate.Values{
"owner": uritemplate.String(owner),
"repo": uritemplate.String(repo),
"path": uritemplate.List(pathParts...),
}
switch {
case sha != "":
baseValues["sha"] = uritemplate.String(sha)
return repositoryResourceCommitContentURITemplate.Expand(baseValues)
case ref != "":
// Parse ref to determine which template to use
switch {
case strings.HasPrefix(ref, "refs/heads/"):
branch := strings.TrimPrefix(ref, "refs/heads/")
baseValues["branch"] = uritemplate.String(branch)
return repositoryResourceBranchContentURITemplate.Expand(baseValues)
case strings.HasPrefix(ref, "refs/tags/"):
tag := strings.TrimPrefix(ref, "refs/tags/")
baseValues["tag"] = uritemplate.String(tag)
return repositoryResourceTagContentURITemplate.Expand(baseValues)
case strings.HasPrefix(ref, "refs/pull/") && strings.HasSuffix(ref, "/head"):
// Extract PR number from "refs/pull/{number}/head"
prPart := strings.TrimPrefix(ref, "refs/pull/")
prNumber := strings.TrimSuffix(prPart, "/head")
baseValues["prNumber"] = uritemplate.String(prNumber)
return repositoryResourcePrContentURITemplate.Expand(baseValues)
case looksLikeSHA(ref):
// ref is actually a SHA (e.g., from resolveGitReference)
baseValues["sha"] = uritemplate.String(ref)
return repositoryResourceCommitContentURITemplate.Expand(baseValues)
default:
// For other refs (like a branch name without refs/heads/ prefix),
// treat it as a branch
baseValues["branch"] = uritemplate.String(ref)
return repositoryResourceBranchContentURITemplate.Expand(baseValues)
}
default:
return repositoryResourceContentURITemplate.Expand(baseValues)
}
}