| Junio C Hamano | f727901 | 2011-08-18 06:13:13 | [diff] [blame] | 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" |
| 2 | "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> |
| 3 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> |
| 4 | <head> |
| 5 | <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> |
| 6 | <meta name="generator" content="AsciiDoc 8.4.5" /> |
| 7 | <title>gitnamespaces(7)</title> |
| 8 | <style type="text/css"> |
| 9 | /* Debug borders */ |
| 10 | p, li, dt, dd, div, pre, h1, h2, h3, h4, h5, h6 { |
| 11 | /* |
| 12 | border: 1px solid red; |
| 13 | */ |
| 14 | } |
| 15 | |
| 16 | body { |
| 17 | margin: 1em 5% 1em 5%; |
| 18 | } |
| 19 | |
| 20 | a { |
| 21 | color: blue; |
| 22 | text-decoration: underline; |
| 23 | } |
| 24 | a:visited { |
| 25 | color: fuchsia; |
| 26 | } |
| 27 | |
| 28 | em { |
| 29 | font-style: italic; |
| 30 | color: navy; |
| 31 | } |
| 32 | |
| 33 | strong { |
| 34 | font-weight: bold; |
| 35 | color: #083194; |
| 36 | } |
| 37 | |
| 38 | tt { |
| 39 | color: navy; |
| 40 | } |
| 41 | |
| 42 | h1, h2, h3, h4, h5, h6 { |
| 43 | color: #527bbd; |
| 44 | font-family: sans-serif; |
| 45 | margin-top: 1.2em; |
| 46 | margin-bottom: 0.5em; |
| 47 | line-height: 1.3; |
| 48 | } |
| 49 | |
| 50 | h1, h2, h3 { |
| 51 | border-bottom: 2px solid silver; |
| 52 | } |
| 53 | h2 { |
| 54 | padding-top: 0.5em; |
| 55 | } |
| 56 | h3 { |
| 57 | float: left; |
| 58 | } |
| 59 | h3 + * { |
| 60 | clear: left; |
| 61 | } |
| 62 | |
| 63 | div.sectionbody { |
| 64 | font-family: serif; |
| 65 | margin-left: 0; |
| 66 | } |
| 67 | |
| 68 | hr { |
| 69 | border: 1px solid silver; |
| 70 | } |
| 71 | |
| 72 | p { |
| 73 | margin-top: 0.5em; |
| 74 | margin-bottom: 0.5em; |
| 75 | } |
| 76 | |
| 77 | ul, ol, li > p { |
| 78 | margin-top: 0; |
| 79 | } |
| 80 | |
| 81 | pre { |
| 82 | padding: 0; |
| 83 | margin: 0; |
| 84 | } |
| 85 | |
| 86 | span#author { |
| 87 | color: #527bbd; |
| 88 | font-family: sans-serif; |
| 89 | font-weight: bold; |
| 90 | font-size: 1.1em; |
| 91 | } |
| 92 | span#email { |
| 93 | } |
| 94 | span#revnumber, span#revdate, span#revremark { |
| 95 | font-family: sans-serif; |
| 96 | } |
| 97 | |
| 98 | div#footer { |
| 99 | font-family: sans-serif; |
| 100 | font-size: small; |
| 101 | border-top: 2px solid silver; |
| 102 | padding-top: 0.5em; |
| 103 | margin-top: 4.0em; |
| 104 | } |
| 105 | div#footer-text { |
| 106 | float: left; |
| 107 | padding-bottom: 0.5em; |
| 108 | } |
| 109 | div#footer-badges { |
| 110 | float: right; |
| 111 | padding-bottom: 0.5em; |
| 112 | } |
| 113 | |
| 114 | div#preamble { |
| 115 | margin-top: 1.5em; |
| 116 | margin-bottom: 1.5em; |
| 117 | } |
| 118 | div.tableblock, div.imageblock, div.exampleblock, div.verseblock, |
| 119 | div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock, |
| 120 | div.admonitionblock { |
| 121 | margin-top: 1.5em; |
| 122 | margin-bottom: 1.5em; |
| 123 | } |
| 124 | div.admonitionblock { |
| 125 | margin-top: 2.5em; |
| 126 | margin-bottom: 2.5em; |
| 127 | } |
| 128 | |
| 129 | div.content { /* Block element content. */ |
| 130 | padding: 0; |
| 131 | } |
| 132 | |
| 133 | /* Block element titles. */ |
| 134 | div.title, caption.title { |
| 135 | color: #527bbd; |
| 136 | font-family: sans-serif; |
| 137 | font-weight: bold; |
| 138 | text-align: left; |
| 139 | margin-top: 1.0em; |
| 140 | margin-bottom: 0.5em; |
| 141 | } |
| 142 | div.title + * { |
| 143 | margin-top: 0; |
| 144 | } |
| 145 | |
| 146 | td div.title:first-child { |
| 147 | margin-top: 0.0em; |
| 148 | } |
| 149 | div.content div.title:first-child { |
| 150 | margin-top: 0.0em; |
| 151 | } |
| 152 | div.content + div.title { |
| 153 | margin-top: 0.0em; |
| 154 | } |
| 155 | |
| 156 | div.sidebarblock > div.content { |
| 157 | background: #ffffee; |
| 158 | border: 1px solid silver; |
| 159 | padding: 0.5em; |
| 160 | } |
| 161 | |
| 162 | div.listingblock > div.content { |
| 163 | border: 1px solid silver; |
| 164 | background: #f4f4f4; |
| 165 | padding: 0.5em; |
| 166 | } |
| 167 | |
| 168 | div.quoteblock { |
| 169 | padding-left: 2.0em; |
| 170 | margin-right: 10%; |
| 171 | } |
| 172 | div.quoteblock > div.attribution { |
| 173 | padding-top: 0.5em; |
| 174 | text-align: right; |
| 175 | } |
| 176 | |
| 177 | div.verseblock { |
| 178 | padding-left: 2.0em; |
| 179 | margin-right: 10%; |
| 180 | } |
| 181 | div.verseblock > div.content { |
| 182 | white-space: pre; |
| 183 | } |
| 184 | div.verseblock > div.attribution { |
| 185 | padding-top: 0.75em; |
| 186 | text-align: left; |
| 187 | } |
| 188 | /* DEPRECATED: Pre version 8.2.7 verse style literal block. */ |
| 189 | div.verseblock + div.attribution { |
| 190 | text-align: left; |
| 191 | } |
| 192 | |
| 193 | div.admonitionblock .icon { |
| 194 | vertical-align: top; |
| 195 | font-size: 1.1em; |
| 196 | font-weight: bold; |
| 197 | text-decoration: underline; |
| 198 | color: #527bbd; |
| 199 | padding-right: 0.5em; |
| 200 | } |
| 201 | div.admonitionblock td.content { |
| 202 | padding-left: 0.5em; |
| 203 | border-left: 2px solid silver; |
| 204 | } |
| 205 | |
| 206 | div.exampleblock > div.content { |
| 207 | border-left: 2px solid silver; |
| 208 | padding: 0.5em; |
| 209 | } |
| 210 | |
| 211 | div.imageblock div.content { padding-left: 0; } |
| 212 | span.image img { border-style: none; } |
| 213 | a.image:visited { color: white; } |
| 214 | |
| 215 | dl { |
| 216 | margin-top: 0.8em; |
| 217 | margin-bottom: 0.8em; |
| 218 | } |
| 219 | dt { |
| 220 | margin-top: 0.5em; |
| 221 | margin-bottom: 0; |
| 222 | font-style: normal; |
| 223 | color: navy; |
| 224 | } |
| 225 | dd > *:first-child { |
| 226 | margin-top: 0.1em; |
| 227 | } |
| 228 | |
| 229 | ul, ol { |
| 230 | list-style-position: outside; |
| 231 | } |
| 232 | ol.arabic { |
| 233 | list-style-type: decimal; |
| 234 | } |
| 235 | ol.loweralpha { |
| 236 | list-style-type: lower-alpha; |
| 237 | } |
| 238 | ol.upperalpha { |
| 239 | list-style-type: upper-alpha; |
| 240 | } |
| 241 | ol.lowerroman { |
| 242 | list-style-type: lower-roman; |
| 243 | } |
| 244 | ol.upperroman { |
| 245 | list-style-type: upper-roman; |
| 246 | } |
| 247 | |
| 248 | div.compact ul, div.compact ol, |
| 249 | div.compact p, div.compact p, |
| 250 | div.compact div, div.compact div { |
| 251 | margin-top: 0.1em; |
| 252 | margin-bottom: 0.1em; |
| 253 | } |
| 254 | |
| 255 | div.tableblock > table { |
| 256 | border: 3px solid #527bbd; |
| 257 | } |
| 258 | thead { |
| 259 | font-family: sans-serif; |
| 260 | font-weight: bold; |
| 261 | } |
| 262 | tfoot { |
| 263 | font-weight: bold; |
| 264 | } |
| 265 | td > div.verse { |
| 266 | white-space: pre; |
| 267 | } |
| 268 | p.table { |
| 269 | margin-top: 0; |
| 270 | } |
| 271 | /* Because the table frame attribute is overriden by CSS in most browsers. */ |
| 272 | div.tableblock > table[frame="void"] { |
| 273 | border-style: none; |
| 274 | } |
| 275 | div.tableblock > table[frame="hsides"] { |
| 276 | border-left-style: none; |
| 277 | border-right-style: none; |
| 278 | } |
| 279 | div.tableblock > table[frame="vsides"] { |
| 280 | border-top-style: none; |
| 281 | border-bottom-style: none; |
| 282 | } |
| 283 | |
| 284 | |
| 285 | div.hdlist { |
| 286 | margin-top: 0.8em; |
| 287 | margin-bottom: 0.8em; |
| 288 | } |
| 289 | div.hdlist tr { |
| 290 | padding-bottom: 15px; |
| 291 | } |
| 292 | dt.hdlist1.strong, td.hdlist1.strong { |
| 293 | font-weight: bold; |
| 294 | } |
| 295 | td.hdlist1 { |
| 296 | vertical-align: top; |
| 297 | font-style: normal; |
| 298 | padding-right: 0.8em; |
| 299 | color: navy; |
| 300 | } |
| 301 | td.hdlist2 { |
| 302 | vertical-align: top; |
| 303 | } |
| 304 | div.hdlist.compact tr { |
| 305 | margin: 0; |
| 306 | padding-bottom: 0; |
| 307 | } |
| 308 | |
| 309 | .comment { |
| 310 | background: yellow; |
| 311 | } |
| 312 | |
| 313 | @media print { |
| 314 | div#footer-badges { display: none; } |
| 315 | } |
| 316 | |
| 317 | div#toctitle { |
| 318 | color: #527bbd; |
| 319 | font-family: sans-serif; |
| 320 | font-size: 1.1em; |
| 321 | font-weight: bold; |
| 322 | margin-top: 1.0em; |
| 323 | margin-bottom: 0.1em; |
| 324 | } |
| 325 | |
| 326 | div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 { |
| 327 | margin-top: 0; |
| 328 | margin-bottom: 0; |
| 329 | } |
| 330 | div.toclevel2 { |
| 331 | margin-left: 2em; |
| 332 | font-size: 0.9em; |
| 333 | } |
| 334 | div.toclevel3 { |
| 335 | margin-left: 4em; |
| 336 | font-size: 0.9em; |
| 337 | } |
| 338 | div.toclevel4 { |
| 339 | margin-left: 6em; |
| 340 | font-size: 0.9em; |
| 341 | } |
| 342 | /* Overrides for manpage documents */ |
| 343 | h1 { |
| 344 | padding-top: 0.5em; |
| 345 | padding-bottom: 0.5em; |
| 346 | border-top: 2px solid silver; |
| 347 | border-bottom: 2px solid silver; |
| 348 | } |
| 349 | h2 { |
| 350 | border-style: none; |
| 351 | } |
| 352 | div.sectionbody { |
| 353 | margin-left: 5%; |
| 354 | } |
| 355 | |
| 356 | @media print { |
| 357 | div#toc { display: none; } |
| 358 | } |
| 359 | |
| 360 | /* Workarounds for IE6's broken and incomplete CSS2. */ |
| 361 | |
| 362 | div.sidebar-content { |
| 363 | background: #ffffee; |
| 364 | border: 1px solid silver; |
| 365 | padding: 0.5em; |
| 366 | } |
| 367 | div.sidebar-title, div.image-title { |
| 368 | color: #527bbd; |
| 369 | font-family: sans-serif; |
| 370 | font-weight: bold; |
| 371 | margin-top: 0.0em; |
| 372 | margin-bottom: 0.5em; |
| 373 | } |
| 374 | |
| 375 | div.listingblock div.content { |
| 376 | border: 1px solid silver; |
| 377 | background: #f4f4f4; |
| 378 | padding: 0.5em; |
| 379 | } |
| 380 | |
| 381 | div.quoteblock-attribution { |
| 382 | padding-top: 0.5em; |
| 383 | text-align: right; |
| 384 | } |
| 385 | |
| 386 | div.verseblock-content { |
| 387 | white-space: pre; |
| 388 | } |
| 389 | div.verseblock-attribution { |
| 390 | padding-top: 0.75em; |
| 391 | text-align: left; |
| 392 | } |
| 393 | |
| 394 | div.exampleblock-content { |
| 395 | border-left: 2px solid silver; |
| 396 | padding-left: 0.5em; |
| 397 | } |
| 398 | |
| 399 | /* IE6 sets dynamically generated links as visited. */ |
| 400 | div#toc a:visited { color: blue; } |
| 401 | </style> |
| 402 | </head> |
| 403 | <body> |
| 404 | <div id="header"> |
| 405 | <h1> |
| 406 | gitnamespaces(7) Manual Page |
| 407 | </h1> |
| 408 | <h2>NAME</h2> |
| 409 | <div class="sectionbody"> |
| 410 | <p>gitnamespaces - |
| 411 | Git namespaces |
| 412 | </p> |
| 413 | </div> |
| 414 | </div> |
| 415 | <h2 id="_description">DESCRIPTION</h2> |
| 416 | <div class="sectionbody"> |
| 417 | <div class="paragraph"><p>Git supports dividing the refs of a single repository into multiple |
| 418 | namespaces, each of which has its own branches, tags, and HEAD. Git can |
| 419 | expose each namespace as an independent repository to pull from and push |
| 420 | to, while sharing the object store, and exposing all the refs to |
| 421 | operations such as <a href="git-gc.html">git-gc(1)</a>.</p></div> |
| 422 | <div class="paragraph"><p>Storing multiple repositories as namespaces of a single repository |
| 423 | avoids storing duplicate copies of the same objects, such as when |
| 424 | storing multiple branches of the same source. The alternates mechanism |
| 425 | provides similar support for avoiding duplicates, but alternates do not |
| 426 | prevent duplication between new objects added to the repositories |
| 427 | without ongoing maintenance, while namespaces do.</p></div> |
| 428 | <div class="paragraph"><p>To specify a namespace, set the <tt>GIT_NAMESPACE</tt> environment variable to |
| 429 | the namespace. For each ref namespace, git stores the corresponding |
| 430 | refs in a directory under <tt>refs/namespaces/</tt>. For example, |
| 431 | <tt>GIT_NAMESPACE=foo</tt> will store refs under <tt>refs/namespaces/foo/</tt>. You |
| 432 | can also specify namespaces via the <tt>--namespace</tt> option to |
| 433 | <a href="git.html">git(1)</a>.</p></div> |
| 434 | <div class="paragraph"><p>Note that namespaces which include a <tt>/</tt> will expand to a hierarchy of |
| 435 | namespaces; for example, <tt>GIT_NAMESPACE=foo/bar</tt> will store refs under |
| 436 | <tt>refs/namespaces/foo/refs/namespaces/bar/</tt>. This makes paths in |
| 437 | <tt>GIT_NAMESPACE</tt> behave hierarchically, so that cloning with |
| 438 | <tt>GIT_NAMESPACE=foo/bar</tt> produces the same result as cloning with |
| 439 | <tt>GIT_NAMESPACE=foo</tt> and cloning from that repo with <tt>GIT_NAMESPACE=bar</tt>. It |
| 440 | also avoids ambiguity with strange namespace paths such as <tt>foo/refs/heads/</tt>, |
| 441 | which could otherwise generate directory/file conflicts within the <tt>refs</tt> |
| 442 | directory.</p></div> |
| 443 | <div class="paragraph"><p><a href="git-upload-pack.html">git-upload-pack(1)</a> and <a href="git-receive-pack.html">git-receive-pack(1)</a> rewrite the |
| 444 | names of refs as specified by <tt>GIT_NAMESPACE</tt>. git-upload-pack and |
| 445 | git-receive-pack will ignore all references outside the specified |
| 446 | namespace.</p></div> |
| 447 | <div class="paragraph"><p>The smart HTTP server, <a href="git-http-backend.html">git-http-backend(1)</a>, will pass |
| 448 | GIT_NAMESPACE through to the backend programs; see |
| 449 | <a href="git-http-backend.html">git-http-backend(1)</a> for sample configuration to expose |
| 450 | repository namespaces as repositories.</p></div> |
| 451 | <div class="paragraph"><p>For a simple local test, you can use <a href="git-remote-ext.html">git-remote-ext(1)</a>:</p></div> |
| 452 | <div class="listingblock"> |
| 453 | <div class="content"> |
| 454 | <pre><tt>git clone ext::'git --namespace=foo %s /tmp/prefixed.git'</tt></pre> |
| 455 | </div></div> |
| 456 | </div> |
| 457 | <h2 id="_security">SECURITY</h2> |
| 458 | <div class="sectionbody"> |
| 459 | <div class="paragraph"><p>Anyone with access to any namespace within a repository can potentially |
| 460 | access objects from any other namespace stored in the same repository. |
| 461 | You can’t directly say "give me object ABCD" if you don’t have a ref to |
| 462 | it, but you can do some other sneaky things like:</p></div> |
| 463 | <div class="olist arabic"><ol class="arabic"> |
| 464 | <li> |
| 465 | <p> |
| 466 | Claiming to push ABCD, at which point the server will optimize out the |
| 467 | need for you to actually send it. Now you have a ref to ABCD and can |
| 468 | fetch it (claiming not to have it, of course). |
| 469 | </p> |
| 470 | </li> |
| 471 | <li> |
| 472 | <p> |
| 473 | Requesting other refs, claiming that you have ABCD, at which point the |
| 474 | server may generate deltas against ABCD. |
| 475 | </p> |
| 476 | </li> |
| 477 | </ol></div> |
| 478 | <div class="paragraph"><p>None of this causes a problem if you only host public repositories, or |
| 479 | if everyone who may read one namespace may also read everything in every |
| 480 | other namespace (for instance, if everyone in an organization has read |
| 481 | permission to every repository).</p></div> |
| 482 | </div> |
| 483 | <div id="footer"> |
| 484 | <div id="footer-text"> |
| 485 | Last updated 2011-08-18 06:09:29 UTC |
| 486 | </div> |
| 487 | </div> |
| 488 | </body> |
| 489 | </html> |
