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package web |
| 2 |
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|
| 3 |
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import ( |
| 4 |
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"context" |
| 5 |
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"encoding/json" |
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"errors" |
| 7 |
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"fmt" |
| 8 |
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"html/template" |
| 9 |
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"log/slog" |
| 10 |
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"net/http" |
| 11 |
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"strings" |
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|
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"github.com/go-chi/chi/v5" |
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"go.bigb.es/auxilia/scribe" |
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"sourcecraft.dev/bigbes/sr-ht-ecore/chrome" |
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"sourcecraft.dev/bigbes/sr-ht-ecore/login" |
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|
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"sourcecraft.dev/bigbes/sr-ht-compare/authz" |
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"sourcecraft.dev/bigbes/sr-ht-compare/core" |
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"sourcecraft.dev/bigbes/sr-ht-compare/gitx" |
| 21 |
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) |
| 22 |
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|
| 23 |
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// recentCommitLimit bounds the first-parent history shown on the repo page. |
| 24 |
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const recentCommitLimit = 20 |
| 25 |
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|
| 26 |
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// compareLogLimit bounds the commit list on the compare page. |
| 27 |
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const compareLogLimit = 50 |
| 28 |
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|
| 29 |
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// ---- JSON transport (consumed by the front-end bundle) -------------------- |
| 30 |
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|
| 31 |
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// jsonFile mirrors one gitx.FileChange for the browser. path is the plain repo |
| 32 |
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// path with NO a/ or b/ prefix. |
| 33 |
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type jsonFile struct { |
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Path string `json:"path"` |
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OldPath string `json:"oldPath"` |
| 36 |
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Status string `json:"status"` |
| 37 |
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Additions int `json:"additions"` |
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Deletions int `json:"deletions"` |
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Binary bool `json:"binary"` |
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} |
| 41 |
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|
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type jsonSpec struct { |
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Base string `json:"base"` |
| 44 |
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Head string `json:"head"` |
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ThreeDot bool `json:"threeDot"` |
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} |
| 47 |
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|
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type compareData struct { |
| 49 |
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Mode string `json:"mode"` |
| 50 |
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Patch string `json:"patch"` |
| 51 |
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Truncated bool `json:"truncated"` |
| 52 |
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Files []jsonFile `json:"files"` |
| 53 |
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Spec jsonSpec `json:"spec"` |
| 54 |
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} |
| 55 |
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|
| 56 |
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// buildCompareJSON marshals the browser payload. json.Marshal escapes <, > and & |
| 57 |
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// (Go's default HTML-safe mode), so the result is safe to drop verbatim inside a |
| 58 |
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// <script> element even when a file path contains "</script>". The bytes are |
| 59 |
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// returned as template.JS: any <script> is a JS context to html/template, so a |
| 60 |
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// plain string (or template.HTML) would be JS-escaped and corrupted; template.JS |
| 61 |
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// is emitted verbatim, and the marshaler's escaping already blocks a breakout. |
| 62 |
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func buildCompareJSON(mode string, patch *gitx.Patch, files []gitx.FileChange, spec jsonSpec) (template.JS, error) { |
| 63 |
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cd := compareData{ |
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Mode: mode, |
| 65 |
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Patch: patch.Text, |
| 66 |
9 |
Truncated: patch.Truncated, |
| 67 |
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Files: []jsonFile{}, |
| 68 |
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Spec: spec, |
| 69 |
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} |
| 70 |
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for _, f := range files { |
| 71 |
14 |
cd.Files = append(cd.Files, jsonFile{ |
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Path: f.Path, |
| 73 |
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OldPath: f.OldPath, |
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Status: f.Status, |
| 75 |
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Additions: f.Additions, |
| 76 |
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Deletions: f.Deletions, |
| 77 |
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Binary: f.Binary, |
| 78 |
14 |
}) |
| 79 |
14 |
} |
| 80 |
9 |
b, err := json.Marshal(cd) |
| 81 |
9 |
if err != nil { |
| 82 |
0 |
return "", err |
| 83 |
0 |
} |
| 84 |
9 |
return template.JS(b), nil |
| 85 |
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} |
| 86 |
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|
| 87 |
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// ---- error mapping -------------------------------------------------------- |
| 88 |
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|
| 89 |
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// httpStatusFor maps a domain error to an HTTP status. Repo visibility uses |
| 90 |
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// core.ErrNotFound so a private repo is a 404, never a 403. |
| 91 |
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func httpStatusFor(err error) int { |
| 92 |
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switch { |
| 93 |
4 |
case errors.Is(err, core.ErrNotFound): |
| 94 |
4 |
return http.StatusNotFound |
| 95 |
2 |
case errors.Is(err, core.ErrBadRef): |
| 96 |
2 |
return http.StatusBadRequest |
| 97 |
0 |
case errors.Is(err, core.ErrForbidden): |
| 98 |
0 |
return http.StatusForbidden |
| 99 |
1 |
default: |
| 100 |
1 |
return http.StatusInternalServerError |
| 101 |
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} |
| 102 |
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} |
| 103 |
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|
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// fail renders the chrome error page for err, logging 5xx causes. |
| 105 |
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// |
| 106 |
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// Only a 400 carries the error's own text, and it is the one class that should: |
| 107 |
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// "invalid git ref" tells the viewer what to change about what they typed. |
| 108 |
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// Every other status takes the instance's standard sentence — a 500 because an |
| 109 |
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// error from below names paths and queries, a 404 because the standard sentence |
| 110 |
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// is exactly the one a repository that never existed produces, which is what |
| 111 |
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// keeps a repository the viewer may not see indistinguishable from an absent |
| 112 |
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// one. |
| 113 |
7 |
func (s *Server) fail(w http.ResponseWriter, r *http.Request, err error) { |
| 114 |
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status := httpStatusFor(err) |
| 115 |
7 |
if status >= 500 { |
| 116 |
1 |
// ErrorContext, so a cancelled or deadlined request is visible as such |
| 117 |
1 |
// in the record rather than as an unexplained 500. scribe.Err expands a |
| 118 |
1 |
// culpa error's message, code, hint and stacktrace into fields of their |
| 119 |
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// own instead of flattening the chain into one sentence. |
| 120 |
1 |
slog.ErrorContext(r.Context(), "web: request failed", |
| 121 |
1 |
scribe.Err(err), "method", r.Method, "path", r.URL.Path) |
| 122 |
1 |
s.renderError(w, r, status, "") |
| 123 |
1 |
return |
| 124 |
1 |
} |
| 125 |
6 |
if status == http.StatusBadRequest { |
| 126 |
2 |
s.renderError(w, r, status, err.Error()) |
| 127 |
2 |
return |
| 128 |
2 |
} |
| 129 |
4 |
s.renderError(w, r, status, "") |
| 130 |
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} |
| 131 |
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|
| 132 |
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// resolve authorizes and opens a repository, returning the git handle and the |
| 133 |
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// authz metadata. Any error is already mapped to the right HTTP status by the |
| 134 |
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// caller via fail. |
| 135 |
18 |
func (s *Server) resolve(ctx context.Context, owner, repo string) (*gitx.Repo, *authz.RepoInfo, error) { |
| 136 |
18 |
viewer := login.FromContext(ctx) |
| 137 |
18 |
info, err := s.authorizer.Repo(ctx, viewer, owner, repo) |
| 138 |
18 |
if err != nil { |
| 139 |
5 |
return nil, nil, err |
| 140 |
5 |
} |
| 141 |
12 |
g, err := gitx.Open(s.reposRoot, owner, repo) |
| 142 |
12 |
if err != nil { |
| 143 |
0 |
return nil, nil, err |
| 144 |
0 |
} |
| 145 |
12 |
return g, info, nil |
| 146 |
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} |
| 147 |
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|
| 148 |
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// ---- index ---------------------------------------------------------------- |
| 149 |
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|
| 150 |
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type indexData struct { |
| 151 |
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LoggedIn bool |
| 152 |
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|
| 153 |
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// Repos is the viewer's own repositories in the shape ecore's |
| 154 |
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// "srht-repo-list" partial renders, so the landing's listing is the same |
| 155 |
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// event-list card the sibling services draw for their own projects. |
| 156 |
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Repos chrome.RepoList |
| 157 |
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} |
| 158 |
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|
| 159 |
8 |
func (s *Server) handleIndex(w http.ResponseWriter, r *http.Request) { |
| 160 |
8 |
ctx := r.Context() |
| 161 |
8 |
username := login.FromContext(ctx) |
| 162 |
8 |
|
| 163 |
8 |
// The title is built from the chrome's own brand fields rather than from a |
| 164 |
8 |
// second read of site-name, so the tab and the nav cannot name the instance |
| 165 |
8 |
// differently. |
| 166 |
8 |
vd := s.view(r, "") |
| 167 |
8 |
vd.Title = vd.SiteName + " " + vd.SiteLabel |
| 168 |
8 |
|
| 169 |
8 |
if username == "" { |
| 170 |
5 |
vd.Data = indexData{LoggedIn: false} |
| 171 |
5 |
s.render(w, http.StatusOK, "index", vd) |
| 172 |
5 |
return |
| 173 |
5 |
} |
| 174 |
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|
| 175 |
3 |
repos, err := s.authorizer.MyRepos(ctx, username) |
| 176 |
3 |
if err != nil { |
| 177 |
0 |
s.fail(w, r, err) |
| 178 |
0 |
return |
| 179 |
0 |
} |
| 180 |
3 |
vd.Data = indexData{LoggedIn: true, Repos: repoList(username, repos)} |
| 181 |
3 |
s.render(w, http.StatusOK, "index", vd) |
| 182 |
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} |
| 183 |
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|
| 184 |
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// repoList turns the authorizer's repositories into the listing ecore renders. |
| 185 |
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// The owner is always the viewer — MyRepos answers for one account — so the |
| 186 |
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// "~owner/name" title and the link are built from the same name and cannot point |
| 187 |
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// at somebody else's repository. |
| 188 |
3 |
func repoList(owner string, repos []authz.RepoInfo) chrome.RepoList { |
| 189 |
3 |
items := make([]chrome.ListItem, 0, len(repos)) |
| 190 |
6 |
for _, info := range repos { |
| 191 |
6 |
items = append(items, chrome.ListItem{ |
| 192 |
6 |
Href: "/~" + owner + "/" + info.Name, |
| 193 |
6 |
Title: "~" + owner + "/" + info.Name, |
| 194 |
6 |
Visibility: info.Visibility, |
| 195 |
6 |
Description: info.Description, |
| 196 |
6 |
}) |
| 197 |
6 |
} |
| 198 |
3 |
return chrome.RepoList{Items: items, Empty: "You have no repositories yet."} |
| 199 |
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} |
| 200 |
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|
| 201 |
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// ---- repo page ------------------------------------------------------------ |
| 202 |
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|
| 203 |
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type repoData struct { |
| 204 |
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Owner string |
| 205 |
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Info *authz.RepoInfo |
| 206 |
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DefaultBranch string |
| 207 |
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Branches []gitx.Ref |
| 208 |
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Tags []gitx.Ref |
| 209 |
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Commits []gitx.CommitInfo |
| 210 |
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} |
| 211 |
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|
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7 |
func (s *Server) handleRepo(w http.ResponseWriter, r *http.Request) { |
| 213 |
7 |
ctx := r.Context() |
| 214 |
7 |
owner := chi.URLParam(r, "owner") |
| 215 |
7 |
repo := chi.URLParam(r, "repo") |
| 216 |
7 |
|
| 217 |
7 |
g, info, err := s.resolve(ctx, owner, repo) |
| 218 |
7 |
if err != nil { |
| 219 |
4 |
s.fail(w, r, err) |
| 220 |
4 |
return |
| 221 |
4 |
} |
| 222 |
|
|
| 223 |
2 |
branches, tags, err := g.Refs(ctx) |
| 224 |
2 |
if err != nil { |
| 225 |
0 |
s.fail(w, r, err) |
| 226 |
0 |
return |
| 227 |
0 |
} |
| 228 |
2 |
def, _ := g.DefaultBranch(ctx) |
| 229 |
2 |
commits, _ := recentCommits(ctx, g, def, recentCommitLimit) |
| 230 |
2 |
|
| 231 |
2 |
vd := s.view(r, "~"+owner+"/"+repo) |
| 232 |
2 |
vd.Data = repoData{ |
| 233 |
2 |
Owner: owner, |
| 234 |
2 |
Info: info, |
| 235 |
2 |
DefaultBranch: def, |
| 236 |
2 |
Branches: branches, |
| 237 |
2 |
Tags: tags, |
| 238 |
2 |
Commits: commits, |
| 239 |
2 |
} |
| 240 |
2 |
s.render(w, http.StatusOK, "repo", vd) |
| 241 |
|
} |
| 242 |
|
|
| 243 |
|
// recentCommits walks first-parent history from rev, returning up to limit |
| 244 |
|
// commits. It relies only on gitx.ResolveCommit so it needs no dedicated log |
| 245 |
|
// range. An unresolvable starting revision (e.g. an empty repository) yields an |
| 246 |
|
// empty slice rather than an error. |
| 247 |
2 |
func recentCommits(ctx context.Context, g *gitx.Repo, rev string, limit int) ([]gitx.CommitInfo, error) { |
| 248 |
2 |
if rev == "" { |
| 249 |
0 |
return nil, nil |
| 250 |
0 |
} |
| 251 |
2 |
var out []gitx.CommitInfo |
| 252 |
2 |
cur := rev |
| 253 |
4 |
for i := 0; i < limit; i++ { |
| 254 |
4 |
ci, err := g.ResolveCommit(ctx, cur) |
| 255 |
4 |
if err != nil { |
| 256 |
0 |
if i == 0 { |
| 257 |
0 |
return nil, nil |
| 258 |
0 |
} |
| 259 |
0 |
break |
| 260 |
|
} |
| 261 |
4 |
out = append(out, *ci) |
| 262 |
4 |
if len(ci.ParentSHAs) == 0 { |
| 263 |
2 |
break |
| 264 |
|
} |
| 265 |
2 |
cur = ci.ParentSHAs[0] |
| 266 |
|
} |
| 267 |
2 |
return out, nil |
| 268 |
|
} |
| 269 |
|
|
| 270 |
|
// ---- compare page --------------------------------------------------------- |
| 271 |
|
|
| 272 |
|
type compareView struct { |
| 273 |
|
Owner string |
| 274 |
|
RepoName string |
| 275 |
|
Info *authz.RepoInfo |
| 276 |
|
Spec core.CompareSpec |
| 277 |
|
MergeBase string |
| 278 |
|
Commits []gitx.CommitInfo |
| 279 |
|
Files []gitx.FileChange |
| 280 |
|
Truncated bool |
| 281 |
|
CompareURL string |
| 282 |
|
PatchURL string |
| 283 |
|
JSON template.JS |
| 284 |
|
} |
| 285 |
|
|
| 286 |
9 |
func (s *Server) handleCompare(w http.ResponseWriter, r *http.Request) { |
| 287 |
9 |
ctx := r.Context() |
| 288 |
9 |
owner := chi.URLParam(r, "owner") |
| 289 |
9 |
repo := chi.URLParam(r, "repo") |
| 290 |
9 |
raw := chi.URLParam(r, "*") |
| 291 |
9 |
|
| 292 |
9 |
// Empty wildcard: this is the compare form's GET target. Canonicalize the |
| 293 |
9 |
// base/head/mode query into a clean compare URL and redirect. |
| 294 |
9 |
if raw == "" { |
| 295 |
0 |
s.compareRedirect(w, r, owner, repo) |
| 296 |
0 |
return |
| 297 |
0 |
} |
| 298 |
|
|
| 299 |
9 |
patchMode := strings.HasSuffix(raw, ".patch") |
| 300 |
9 |
specRaw := strings.TrimSuffix(raw, ".patch") |
| 301 |
9 |
|
| 302 |
9 |
spec, err := core.ParseCompareSpec(specRaw) |
| 303 |
9 |
if err != nil { |
| 304 |
2 |
s.fail(w, r, err) |
| 305 |
2 |
return |
| 306 |
2 |
} |
| 307 |
|
|
| 308 |
7 |
g, info, err := s.resolve(ctx, owner, repo) |
| 309 |
7 |
if err != nil { |
| 310 |
1 |
s.fail(w, r, err) |
| 311 |
1 |
return |
| 312 |
1 |
} |
| 313 |
|
|
| 314 |
6 |
compareURL := fmt.Sprintf("/~%s/%s/compare/%s", owner, repo, specRaw) |
| 315 |
6 |
|
| 316 |
6 |
if patchMode { |
| 317 |
1 |
patch, err := g.RawDiff(ctx, spec) |
| 318 |
1 |
if err != nil { |
| 319 |
0 |
s.fail(w, r, err) |
| 320 |
0 |
return |
| 321 |
0 |
} |
| 322 |
1 |
s.writePatch(w, patch.Text) |
| 323 |
1 |
return |
| 324 |
|
} |
| 325 |
|
|
| 326 |
5 |
patch, err := g.Diff(ctx, spec) |
| 327 |
5 |
if err != nil { |
| 328 |
0 |
s.fail(w, r, err) |
| 329 |
0 |
return |
| 330 |
0 |
} |
| 331 |
5 |
files, err := g.DiffStat(ctx, spec) |
| 332 |
5 |
if err != nil { |
| 333 |
0 |
s.fail(w, r, err) |
| 334 |
0 |
return |
| 335 |
0 |
} |
| 336 |
5 |
commits, err := g.Log(ctx, spec.Base, spec.Head, compareLogLimit) |
| 337 |
5 |
if err != nil { |
| 338 |
0 |
s.fail(w, r, err) |
| 339 |
0 |
return |
| 340 |
0 |
} |
| 341 |
|
|
| 342 |
5 |
var mergeBase string |
| 343 |
5 |
if spec.ThreeDot { |
| 344 |
4 |
mergeBase, _ = g.MergeBase(ctx, spec.Base, spec.Head) |
| 345 |
4 |
} |
| 346 |
|
|
| 347 |
5 |
jsonPayload, err := buildCompareJSON("compare", patch, files, jsonSpec{ |
| 348 |
5 |
Base: spec.Base, |
| 349 |
5 |
Head: spec.Head, |
| 350 |
5 |
ThreeDot: spec.ThreeDot, |
| 351 |
5 |
}) |
| 352 |
5 |
if err != nil { |
| 353 |
0 |
s.fail(w, r, err) |
| 354 |
0 |
return |
| 355 |
0 |
} |
| 356 |
|
|
| 357 |
5 |
vd := s.view(r, fmt.Sprintf("~%s/%s: %s...%s", owner, repo, spec.Base, spec.Head)) |
| 358 |
5 |
vd.ContainerClass = "container-fluid" |
| 359 |
5 |
vd.Data = compareView{ |
| 360 |
5 |
Owner: owner, |
| 361 |
5 |
RepoName: repo, |
| 362 |
5 |
Info: info, |
| 363 |
5 |
Spec: spec, |
| 364 |
5 |
MergeBase: mergeBase, |
| 365 |
5 |
Commits: commits, |
| 366 |
5 |
Files: files, |
| 367 |
5 |
Truncated: patch.Truncated, |
| 368 |
5 |
CompareURL: compareURL, |
| 369 |
5 |
PatchURL: compareURL + ".patch", |
| 370 |
5 |
JSON: jsonPayload, |
| 371 |
5 |
} |
| 372 |
5 |
s.render(w, http.StatusOK, "compare", vd) |
| 373 |
|
} |
| 374 |
|
|
| 375 |
|
// compareRedirect turns ?base=&head=&mode= into a canonical compare URL. mode |
| 376 |
|
// "two" selects the two-dot range; anything else (the default) is three-dot. |
| 377 |
0 |
func (s *Server) compareRedirect(w http.ResponseWriter, r *http.Request, owner, repo string) { |
| 378 |
0 |
q := r.URL.Query() |
| 379 |
0 |
base := strings.TrimSpace(q.Get("base")) |
| 380 |
0 |
head := strings.TrimSpace(q.Get("head")) |
| 381 |
0 |
if base == "" || head == "" { |
| 382 |
0 |
s.renderError(w, r, http.StatusBadRequest, "both base and head are required") |
| 383 |
0 |
return |
| 384 |
0 |
} |
| 385 |
0 |
sep := "..." |
| 386 |
0 |
if q.Get("mode") == "two" { |
| 387 |
0 |
sep = ".." |
| 388 |
0 |
} |
| 389 |
0 |
http.Redirect(w, r, fmt.Sprintf("/~%s/%s/compare/%s%s%s", owner, repo, base, sep, head), http.StatusFound) |
| 390 |
|
} |
| 391 |
|
|
| 392 |
|
// ---- commit page ---------------------------------------------------------- |
| 393 |
|
|
| 394 |
|
type commitView struct { |
| 395 |
|
Owner string |
| 396 |
|
RepoName string |
| 397 |
|
Info *authz.RepoInfo |
| 398 |
|
Commit *gitx.CommitInfo |
| 399 |
|
Files []gitx.FileChange |
| 400 |
|
IsMerge bool |
| 401 |
|
Truncated bool |
| 402 |
|
CommitURL string |
| 403 |
|
PatchURL string |
| 404 |
|
JSON template.JS |
| 405 |
|
} |
| 406 |
|
|
| 407 |
4 |
func (s *Server) handleCommit(w http.ResponseWriter, r *http.Request) { |
| 408 |
4 |
ctx := r.Context() |
| 409 |
4 |
owner := chi.URLParam(r, "owner") |
| 410 |
4 |
repo := chi.URLParam(r, "repo") |
| 411 |
4 |
rev := chi.URLParam(r, "rev") |
| 412 |
4 |
|
| 413 |
4 |
patchMode := strings.HasSuffix(rev, ".patch") |
| 414 |
4 |
rev = strings.TrimSuffix(rev, ".patch") |
| 415 |
4 |
|
| 416 |
4 |
g, info, err := s.resolve(ctx, owner, repo) |
| 417 |
4 |
if err != nil { |
| 418 |
0 |
s.fail(w, r, err) |
| 419 |
0 |
return |
| 420 |
0 |
} |
| 421 |
|
|
| 422 |
4 |
patch, files, ci, err := g.CommitPatch(ctx, rev) |
| 423 |
4 |
if err != nil { |
| 424 |
0 |
s.fail(w, r, err) |
| 425 |
0 |
return |
| 426 |
0 |
} |
| 427 |
|
|
| 428 |
4 |
if patchMode { |
| 429 |
1 |
s.writePatch(w, patch.Text) |
| 430 |
1 |
return |
| 431 |
1 |
} |
| 432 |
|
|
| 433 |
3 |
commitURL := fmt.Sprintf("/~%s/%s/commit/%s", owner, repo, rev) |
| 434 |
3 |
|
| 435 |
3 |
base := "" |
| 436 |
3 |
if len(ci.ParentSHAs) > 0 { |
| 437 |
3 |
base = ci.ParentSHAs[0] |
| 438 |
3 |
} |
| 439 |
3 |
jsonPayload, err := buildCompareJSON("commit", patch, files, jsonSpec{ |
| 440 |
3 |
Base: base, |
| 441 |
3 |
Head: ci.SHA, |
| 442 |
3 |
ThreeDot: false, |
| 443 |
3 |
}) |
| 444 |
3 |
if err != nil { |
| 445 |
0 |
s.fail(w, r, err) |
| 446 |
0 |
return |
| 447 |
0 |
} |
| 448 |
|
|
| 449 |
3 |
vd := s.view(r, fmt.Sprintf("~%s/%s: %s", owner, repo, ci.ShortSHA)) |
| 450 |
3 |
vd.ContainerClass = "container-fluid" |
| 451 |
3 |
vd.Data = commitView{ |
| 452 |
3 |
Owner: owner, |
| 453 |
3 |
RepoName: repo, |
| 454 |
3 |
Info: info, |
| 455 |
3 |
Commit: ci, |
| 456 |
3 |
Files: files, |
| 457 |
3 |
IsMerge: len(ci.ParentSHAs) > 1, |
| 458 |
3 |
Truncated: patch.Truncated, |
| 459 |
3 |
CommitURL: commitURL, |
| 460 |
3 |
PatchURL: commitURL + ".patch", |
| 461 |
3 |
JSON: jsonPayload, |
| 462 |
3 |
} |
| 463 |
3 |
s.render(w, http.StatusOK, "commit", vd) |
| 464 |
|
} |
| 465 |
|
|
| 466 |
|
// writePatch emits a raw unified diff as an inline text/plain document. |
| 467 |
2 |
func (s *Server) writePatch(w http.ResponseWriter, text string) { |
| 468 |
2 |
w.Header().Set("Content-Type", "text/plain; charset=utf-8") |
| 469 |
2 |
w.Header().Set("Content-Disposition", "inline") |
| 470 |
2 |
w.WriteHeader(http.StatusOK) |
| 471 |
2 |
_, _ = w.Write([]byte(text)) |
| 472 |
2 |
} |