Documentation / git.txton commit Merge branch 'ew/gc-auto-pack-limit-fix' (97865e8)
   1git(1)
   2======
   3
   4NAME
   5----
   6git - the stupid content tracker
   7
   8
   9SYNOPSIS
  10--------
  11[verse]
  12'git' [--version] [--help] [-C <path>] [-c <name>=<value>]
  13    [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
  14    [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
  15    [--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
  16    <command> [<args>]
  17
  18DESCRIPTION
  19-----------
  20Git is a fast, scalable, distributed revision control system with an
  21unusually rich command set that provides both high-level operations
  22and full access to internals.
  23
  24See linkgit:gittutorial[7] to get started, then see
  25linkgit:giteveryday[7] for a useful minimum set of
  26commands.  The link:user-manual.html[Git User's Manual] has a more
  27in-depth introduction.
  28
  29After you mastered the basic concepts, you can come back to this
  30page to learn what commands Git offers.  You can learn more about
  31individual Git commands with "git help command".  linkgit:gitcli[7]
  32manual page gives you an overview of the command-line command syntax.
  33
  34A formatted and hyperlinked copy of the latest Git documentation
  35can be viewed at `https://git.github.io/htmldocs/git.html`.
  36
  37ifdef::stalenotes[]
  38[NOTE]
  39============
  40
  41You are reading the documentation for the latest (possibly
  42unreleased) version of Git, that is available from the 'master'
  43branch of the `git.git` repository.
  44Documentation for older releases are available here:
  45
  46* link:v2.9.1/git.html[documentation for release 2.9.1]
  47
  48* release notes for
  49  link:RelNotes/2.9.1.txt[2.9.1],
  50  link:RelNotes/2.9.0.txt[2.9].
  51
  52* link:v2.8.4/git.html[documentation for release 2.8.4]
  53
  54* release notes for
  55  link:RelNotes/2.8.4.txt[2.8.4],
  56  link:RelNotes/2.8.3.txt[2.8.3],
  57  link:RelNotes/2.8.2.txt[2.8.2],
  58  link:RelNotes/2.8.1.txt[2.8.1],
  59  link:RelNotes/2.8.0.txt[2.8].
  60
  61* link:v2.7.3/git.html[documentation for release 2.7.3]
  62
  63* release notes for
  64  link:RelNotes/2.7.3.txt[2.7.3],
  65  link:RelNotes/2.7.2.txt[2.7.2],
  66  link:RelNotes/2.7.1.txt[2.7.1],
  67  link:RelNotes/2.7.0.txt[2.7].
  68
  69* link:v2.6.6/git.html[documentation for release 2.6.6]
  70
  71* release notes for
  72  link:RelNotes/2.6.6.txt[2.6.6],
  73  link:RelNotes/2.6.5.txt[2.6.5],
  74  link:RelNotes/2.6.4.txt[2.6.4],
  75  link:RelNotes/2.6.3.txt[2.6.3],
  76  link:RelNotes/2.6.2.txt[2.6.2],
  77  link:RelNotes/2.6.1.txt[2.6.1],
  78  link:RelNotes/2.6.0.txt[2.6].
  79
  80* link:v2.5.5/git.html[documentation for release 2.5.5]
  81
  82* release notes for
  83  link:RelNotes/2.5.5.txt[2.5.5],
  84  link:RelNotes/2.5.4.txt[2.5.4],
  85  link:RelNotes/2.5.3.txt[2.5.3],
  86  link:RelNotes/2.5.2.txt[2.5.2],
  87  link:RelNotes/2.5.1.txt[2.5.1],
  88  link:RelNotes/2.5.0.txt[2.5].
  89
  90* link:v2.4.11/git.html[documentation for release 2.4.11]
  91
  92* release notes for
  93  link:RelNotes/2.4.11.txt[2.4.11],
  94  link:RelNotes/2.4.10.txt[2.4.10],
  95  link:RelNotes/2.4.9.txt[2.4.9],
  96  link:RelNotes/2.4.8.txt[2.4.8],
  97  link:RelNotes/2.4.7.txt[2.4.7],
  98  link:RelNotes/2.4.6.txt[2.4.6],
  99  link:RelNotes/2.4.5.txt[2.4.5],
 100  link:RelNotes/2.4.4.txt[2.4.4],
 101  link:RelNotes/2.4.3.txt[2.4.3],
 102  link:RelNotes/2.4.2.txt[2.4.2],
 103  link:RelNotes/2.4.1.txt[2.4.1],
 104  link:RelNotes/2.4.0.txt[2.4].
 105
 106* link:v2.3.10/git.html[documentation for release 2.3.10]
 107
 108* release notes for
 109  link:RelNotes/2.3.10.txt[2.3.10],
 110  link:RelNotes/2.3.9.txt[2.3.9],
 111  link:RelNotes/2.3.8.txt[2.3.8],
 112  link:RelNotes/2.3.7.txt[2.3.7],
 113  link:RelNotes/2.3.6.txt[2.3.6],
 114  link:RelNotes/2.3.5.txt[2.3.5],
 115  link:RelNotes/2.3.4.txt[2.3.4],
 116  link:RelNotes/2.3.3.txt[2.3.3],
 117  link:RelNotes/2.3.2.txt[2.3.2],
 118  link:RelNotes/2.3.1.txt[2.3.1],
 119  link:RelNotes/2.3.0.txt[2.3].
 120
 121* link:v2.2.3/git.html[documentation for release 2.2.3]
 122
 123* release notes for
 124  link:RelNotes/2.2.3.txt[2.2.3],
 125  link:RelNotes/2.2.2.txt[2.2.2],
 126  link:RelNotes/2.2.1.txt[2.2.1],
 127  link:RelNotes/2.2.0.txt[2.2].
 128
 129* link:v2.1.4/git.html[documentation for release 2.1.4]
 130
 131* release notes for
 132  link:RelNotes/2.1.4.txt[2.1.4],
 133  link:RelNotes/2.1.3.txt[2.1.3],
 134  link:RelNotes/2.1.2.txt[2.1.2],
 135  link:RelNotes/2.1.1.txt[2.1.1],
 136  link:RelNotes/2.1.0.txt[2.1].
 137
 138* link:v2.0.5/git.html[documentation for release 2.0.5]
 139
 140* release notes for
 141  link:RelNotes/2.0.5.txt[2.0.5],
 142  link:RelNotes/2.0.4.txt[2.0.4],
 143  link:RelNotes/2.0.3.txt[2.0.3],
 144  link:RelNotes/2.0.2.txt[2.0.2],
 145  link:RelNotes/2.0.1.txt[2.0.1],
 146  link:RelNotes/2.0.0.txt[2.0.0].
 147
 148* link:v1.9.5/git.html[documentation for release 1.9.5]
 149
 150* release notes for
 151  link:RelNotes/1.9.5.txt[1.9.5],
 152  link:RelNotes/1.9.4.txt[1.9.4],
 153  link:RelNotes/1.9.3.txt[1.9.3],
 154  link:RelNotes/1.9.2.txt[1.9.2],
 155  link:RelNotes/1.9.1.txt[1.9.1],
 156  link:RelNotes/1.9.0.txt[1.9.0].
 157
 158* link:v1.8.5.6/git.html[documentation for release 1.8.5.6]
 159
 160* release notes for
 161  link:RelNotes/1.8.5.6.txt[1.8.5.6],
 162  link:RelNotes/1.8.5.5.txt[1.8.5.5],
 163  link:RelNotes/1.8.5.4.txt[1.8.5.4],
 164  link:RelNotes/1.8.5.3.txt[1.8.5.3],
 165  link:RelNotes/1.8.5.2.txt[1.8.5.2],
 166  link:RelNotes/1.8.5.1.txt[1.8.5.1],
 167  link:RelNotes/1.8.5.txt[1.8.5].
 168
 169* link:v1.8.4.5/git.html[documentation for release 1.8.4.5]
 170
 171* release notes for
 172  link:RelNotes/1.8.4.5.txt[1.8.4.5],
 173  link:RelNotes/1.8.4.4.txt[1.8.4.4],
 174  link:RelNotes/1.8.4.3.txt[1.8.4.3],
 175  link:RelNotes/1.8.4.2.txt[1.8.4.2],
 176  link:RelNotes/1.8.4.1.txt[1.8.4.1],
 177  link:RelNotes/1.8.4.txt[1.8.4].
 178
 179* link:v1.8.3.4/git.html[documentation for release 1.8.3.4]
 180
 181* release notes for
 182  link:RelNotes/1.8.3.4.txt[1.8.3.4],
 183  link:RelNotes/1.8.3.3.txt[1.8.3.3],
 184  link:RelNotes/1.8.3.2.txt[1.8.3.2],
 185  link:RelNotes/1.8.3.1.txt[1.8.3.1],
 186  link:RelNotes/1.8.3.txt[1.8.3].
 187
 188* link:v1.8.2.3/git.html[documentation for release 1.8.2.3]
 189
 190* release notes for
 191  link:RelNotes/1.8.2.3.txt[1.8.2.3],
 192  link:RelNotes/1.8.2.2.txt[1.8.2.2],
 193  link:RelNotes/1.8.2.1.txt[1.8.2.1],
 194  link:RelNotes/1.8.2.txt[1.8.2].
 195
 196* link:v1.8.1.6/git.html[documentation for release 1.8.1.6]
 197
 198* release notes for
 199  link:RelNotes/1.8.1.6.txt[1.8.1.6],
 200  link:RelNotes/1.8.1.5.txt[1.8.1.5],
 201  link:RelNotes/1.8.1.4.txt[1.8.1.4],
 202  link:RelNotes/1.8.1.3.txt[1.8.1.3],
 203  link:RelNotes/1.8.1.2.txt[1.8.1.2],
 204  link:RelNotes/1.8.1.1.txt[1.8.1.1],
 205  link:RelNotes/1.8.1.txt[1.8.1].
 206
 207* link:v1.8.0.3/git.html[documentation for release 1.8.0.3]
 208
 209* release notes for
 210  link:RelNotes/1.8.0.3.txt[1.8.0.3],
 211  link:RelNotes/1.8.0.2.txt[1.8.0.2],
 212  link:RelNotes/1.8.0.1.txt[1.8.0.1],
 213  link:RelNotes/1.8.0.txt[1.8.0].
 214
 215* link:v1.7.12.4/git.html[documentation for release 1.7.12.4]
 216
 217* release notes for
 218  link:RelNotes/1.7.12.4.txt[1.7.12.4],
 219  link:RelNotes/1.7.12.3.txt[1.7.12.3],
 220  link:RelNotes/1.7.12.2.txt[1.7.12.2],
 221  link:RelNotes/1.7.12.1.txt[1.7.12.1],
 222  link:RelNotes/1.7.12.txt[1.7.12].
 223
 224* link:v1.7.11.7/git.html[documentation for release 1.7.11.7]
 225
 226* release notes for
 227  link:RelNotes/1.7.11.7.txt[1.7.11.7],
 228  link:RelNotes/1.7.11.6.txt[1.7.11.6],
 229  link:RelNotes/1.7.11.5.txt[1.7.11.5],
 230  link:RelNotes/1.7.11.4.txt[1.7.11.4],
 231  link:RelNotes/1.7.11.3.txt[1.7.11.3],
 232  link:RelNotes/1.7.11.2.txt[1.7.11.2],
 233  link:RelNotes/1.7.11.1.txt[1.7.11.1],
 234  link:RelNotes/1.7.11.txt[1.7.11].
 235
 236* link:v1.7.10.5/git.html[documentation for release 1.7.10.5]
 237
 238* release notes for
 239  link:RelNotes/1.7.10.5.txt[1.7.10.5],
 240  link:RelNotes/1.7.10.4.txt[1.7.10.4],
 241  link:RelNotes/1.7.10.3.txt[1.7.10.3],
 242  link:RelNotes/1.7.10.2.txt[1.7.10.2],
 243  link:RelNotes/1.7.10.1.txt[1.7.10.1],
 244  link:RelNotes/1.7.10.txt[1.7.10].
 245
 246* link:v1.7.9.7/git.html[documentation for release 1.7.9.7]
 247
 248* release notes for
 249  link:RelNotes/1.7.9.7.txt[1.7.9.7],
 250  link:RelNotes/1.7.9.6.txt[1.7.9.6],
 251  link:RelNotes/1.7.9.5.txt[1.7.9.5],
 252  link:RelNotes/1.7.9.4.txt[1.7.9.4],
 253  link:RelNotes/1.7.9.3.txt[1.7.9.3],
 254  link:RelNotes/1.7.9.2.txt[1.7.9.2],
 255  link:RelNotes/1.7.9.1.txt[1.7.9.1],
 256  link:RelNotes/1.7.9.txt[1.7.9].
 257
 258* link:v1.7.8.6/git.html[documentation for release 1.7.8.6]
 259
 260* release notes for
 261  link:RelNotes/1.7.8.6.txt[1.7.8.6],
 262  link:RelNotes/1.7.8.5.txt[1.7.8.5],
 263  link:RelNotes/1.7.8.4.txt[1.7.8.4],
 264  link:RelNotes/1.7.8.3.txt[1.7.8.3],
 265  link:RelNotes/1.7.8.2.txt[1.7.8.2],
 266  link:RelNotes/1.7.8.1.txt[1.7.8.1],
 267  link:RelNotes/1.7.8.txt[1.7.8].
 268
 269* link:v1.7.7.7/git.html[documentation for release 1.7.7.7]
 270
 271* release notes for
 272  link:RelNotes/1.7.7.7.txt[1.7.7.7],
 273  link:RelNotes/1.7.7.6.txt[1.7.7.6],
 274  link:RelNotes/1.7.7.5.txt[1.7.7.5],
 275  link:RelNotes/1.7.7.4.txt[1.7.7.4],
 276  link:RelNotes/1.7.7.3.txt[1.7.7.3],
 277  link:RelNotes/1.7.7.2.txt[1.7.7.2],
 278  link:RelNotes/1.7.7.1.txt[1.7.7.1],
 279  link:RelNotes/1.7.7.txt[1.7.7].
 280
 281* link:v1.7.6.6/git.html[documentation for release 1.7.6.6]
 282
 283* release notes for
 284  link:RelNotes/1.7.6.6.txt[1.7.6.6],
 285  link:RelNotes/1.7.6.5.txt[1.7.6.5],
 286  link:RelNotes/1.7.6.4.txt[1.7.6.4],
 287  link:RelNotes/1.7.6.3.txt[1.7.6.3],
 288  link:RelNotes/1.7.6.2.txt[1.7.6.2],
 289  link:RelNotes/1.7.6.1.txt[1.7.6.1],
 290  link:RelNotes/1.7.6.txt[1.7.6].
 291
 292* link:v1.7.5.4/git.html[documentation for release 1.7.5.4]
 293
 294* release notes for
 295  link:RelNotes/1.7.5.4.txt[1.7.5.4],
 296  link:RelNotes/1.7.5.3.txt[1.7.5.3],
 297  link:RelNotes/1.7.5.2.txt[1.7.5.2],
 298  link:RelNotes/1.7.5.1.txt[1.7.5.1],
 299  link:RelNotes/1.7.5.txt[1.7.5].
 300
 301* link:v1.7.4.5/git.html[documentation for release 1.7.4.5]
 302
 303* release notes for
 304  link:RelNotes/1.7.4.5.txt[1.7.4.5],
 305  link:RelNotes/1.7.4.4.txt[1.7.4.4],
 306  link:RelNotes/1.7.4.3.txt[1.7.4.3],
 307  link:RelNotes/1.7.4.2.txt[1.7.4.2],
 308  link:RelNotes/1.7.4.1.txt[1.7.4.1],
 309  link:RelNotes/1.7.4.txt[1.7.4].
 310
 311* link:v1.7.3.5/git.html[documentation for release 1.7.3.5]
 312
 313* release notes for
 314  link:RelNotes/1.7.3.5.txt[1.7.3.5],
 315  link:RelNotes/1.7.3.4.txt[1.7.3.4],
 316  link:RelNotes/1.7.3.3.txt[1.7.3.3],
 317  link:RelNotes/1.7.3.2.txt[1.7.3.2],
 318  link:RelNotes/1.7.3.1.txt[1.7.3.1],
 319  link:RelNotes/1.7.3.txt[1.7.3].
 320
 321* link:v1.7.2.5/git.html[documentation for release 1.7.2.5]
 322
 323* release notes for
 324  link:RelNotes/1.7.2.5.txt[1.7.2.5],
 325  link:RelNotes/1.7.2.4.txt[1.7.2.4],
 326  link:RelNotes/1.7.2.3.txt[1.7.2.3],
 327  link:RelNotes/1.7.2.2.txt[1.7.2.2],
 328  link:RelNotes/1.7.2.1.txt[1.7.2.1],
 329  link:RelNotes/1.7.2.txt[1.7.2].
 330
 331* link:v1.7.1.4/git.html[documentation for release 1.7.1.4]
 332
 333* release notes for
 334  link:RelNotes/1.7.1.4.txt[1.7.1.4],
 335  link:RelNotes/1.7.1.3.txt[1.7.1.3],
 336  link:RelNotes/1.7.1.2.txt[1.7.1.2],
 337  link:RelNotes/1.7.1.1.txt[1.7.1.1],
 338  link:RelNotes/1.7.1.txt[1.7.1].
 339
 340* link:v1.7.0.9/git.html[documentation for release 1.7.0.9]
 341
 342* release notes for
 343  link:RelNotes/1.7.0.9.txt[1.7.0.9],
 344  link:RelNotes/1.7.0.8.txt[1.7.0.8],
 345  link:RelNotes/1.7.0.7.txt[1.7.0.7],
 346  link:RelNotes/1.7.0.6.txt[1.7.0.6],
 347  link:RelNotes/1.7.0.5.txt[1.7.0.5],
 348  link:RelNotes/1.7.0.4.txt[1.7.0.4],
 349  link:RelNotes/1.7.0.3.txt[1.7.0.3],
 350  link:RelNotes/1.7.0.2.txt[1.7.0.2],
 351  link:RelNotes/1.7.0.1.txt[1.7.0.1],
 352  link:RelNotes/1.7.0.txt[1.7.0].
 353
 354* link:v1.6.6.3/git.html[documentation for release 1.6.6.3]
 355
 356* release notes for
 357  link:RelNotes/1.6.6.3.txt[1.6.6.3],
 358  link:RelNotes/1.6.6.2.txt[1.6.6.2],
 359  link:RelNotes/1.6.6.1.txt[1.6.6.1],
 360  link:RelNotes/1.6.6.txt[1.6.6].
 361
 362* link:v1.6.5.9/git.html[documentation for release 1.6.5.9]
 363
 364* release notes for
 365  link:RelNotes/1.6.5.9.txt[1.6.5.9],
 366  link:RelNotes/1.6.5.8.txt[1.6.5.8],
 367  link:RelNotes/1.6.5.7.txt[1.6.5.7],
 368  link:RelNotes/1.6.5.6.txt[1.6.5.6],
 369  link:RelNotes/1.6.5.5.txt[1.6.5.5],
 370  link:RelNotes/1.6.5.4.txt[1.6.5.4],
 371  link:RelNotes/1.6.5.3.txt[1.6.5.3],
 372  link:RelNotes/1.6.5.2.txt[1.6.5.2],
 373  link:RelNotes/1.6.5.1.txt[1.6.5.1],
 374  link:RelNotes/1.6.5.txt[1.6.5].
 375
 376* link:v1.6.4.5/git.html[documentation for release 1.6.4.5]
 377
 378* release notes for
 379  link:RelNotes/1.6.4.5.txt[1.6.4.5],
 380  link:RelNotes/1.6.4.4.txt[1.6.4.4],
 381  link:RelNotes/1.6.4.3.txt[1.6.4.3],
 382  link:RelNotes/1.6.4.2.txt[1.6.4.2],
 383  link:RelNotes/1.6.4.1.txt[1.6.4.1],
 384  link:RelNotes/1.6.4.txt[1.6.4].
 385
 386* link:v1.6.3.4/git.html[documentation for release 1.6.3.4]
 387
 388* release notes for
 389  link:RelNotes/1.6.3.4.txt[1.6.3.4],
 390  link:RelNotes/1.6.3.3.txt[1.6.3.3],
 391  link:RelNotes/1.6.3.2.txt[1.6.3.2],
 392  link:RelNotes/1.6.3.1.txt[1.6.3.1],
 393  link:RelNotes/1.6.3.txt[1.6.3].
 394
 395* release notes for
 396  link:RelNotes/1.6.2.5.txt[1.6.2.5],
 397  link:RelNotes/1.6.2.4.txt[1.6.2.4],
 398  link:RelNotes/1.6.2.3.txt[1.6.2.3],
 399  link:RelNotes/1.6.2.2.txt[1.6.2.2],
 400  link:RelNotes/1.6.2.1.txt[1.6.2.1],
 401  link:RelNotes/1.6.2.txt[1.6.2].
 402
 403* link:v1.6.1.3/git.html[documentation for release 1.6.1.3]
 404
 405* release notes for
 406  link:RelNotes/1.6.1.3.txt[1.6.1.3],
 407  link:RelNotes/1.6.1.2.txt[1.6.1.2],
 408  link:RelNotes/1.6.1.1.txt[1.6.1.1],
 409  link:RelNotes/1.6.1.txt[1.6.1].
 410
 411* link:v1.6.0.6/git.html[documentation for release 1.6.0.6]
 412
 413* release notes for
 414  link:RelNotes/1.6.0.6.txt[1.6.0.6],
 415  link:RelNotes/1.6.0.5.txt[1.6.0.5],
 416  link:RelNotes/1.6.0.4.txt[1.6.0.4],
 417  link:RelNotes/1.6.0.3.txt[1.6.0.3],
 418  link:RelNotes/1.6.0.2.txt[1.6.0.2],
 419  link:RelNotes/1.6.0.1.txt[1.6.0.1],
 420  link:RelNotes/1.6.0.txt[1.6.0].
 421
 422* link:v1.5.6.6/git.html[documentation for release 1.5.6.6]
 423
 424* release notes for
 425  link:RelNotes/1.5.6.6.txt[1.5.6.6],
 426  link:RelNotes/1.5.6.5.txt[1.5.6.5],
 427  link:RelNotes/1.5.6.4.txt[1.5.6.4],
 428  link:RelNotes/1.5.6.3.txt[1.5.6.3],
 429  link:RelNotes/1.5.6.2.txt[1.5.6.2],
 430  link:RelNotes/1.5.6.1.txt[1.5.6.1],
 431  link:RelNotes/1.5.6.txt[1.5.6].
 432
 433* link:v1.5.5.6/git.html[documentation for release 1.5.5.6]
 434
 435* release notes for
 436  link:RelNotes/1.5.5.6.txt[1.5.5.6],
 437  link:RelNotes/1.5.5.5.txt[1.5.5.5],
 438  link:RelNotes/1.5.5.4.txt[1.5.5.4],
 439  link:RelNotes/1.5.5.3.txt[1.5.5.3],
 440  link:RelNotes/1.5.5.2.txt[1.5.5.2],
 441  link:RelNotes/1.5.5.1.txt[1.5.5.1],
 442  link:RelNotes/1.5.5.txt[1.5.5].
 443
 444* link:v1.5.4.7/git.html[documentation for release 1.5.4.7]
 445
 446* release notes for
 447  link:RelNotes/1.5.4.7.txt[1.5.4.7],
 448  link:RelNotes/1.5.4.6.txt[1.5.4.6],
 449  link:RelNotes/1.5.4.5.txt[1.5.4.5],
 450  link:RelNotes/1.5.4.4.txt[1.5.4.4],
 451  link:RelNotes/1.5.4.3.txt[1.5.4.3],
 452  link:RelNotes/1.5.4.2.txt[1.5.4.2],
 453  link:RelNotes/1.5.4.1.txt[1.5.4.1],
 454  link:RelNotes/1.5.4.txt[1.5.4].
 455
 456* link:v1.5.3.8/git.html[documentation for release 1.5.3.8]
 457
 458* release notes for
 459  link:RelNotes/1.5.3.8.txt[1.5.3.8],
 460  link:RelNotes/1.5.3.7.txt[1.5.3.7],
 461  link:RelNotes/1.5.3.6.txt[1.5.3.6],
 462  link:RelNotes/1.5.3.5.txt[1.5.3.5],
 463  link:RelNotes/1.5.3.4.txt[1.5.3.4],
 464  link:RelNotes/1.5.3.3.txt[1.5.3.3],
 465  link:RelNotes/1.5.3.2.txt[1.5.3.2],
 466  link:RelNotes/1.5.3.1.txt[1.5.3.1],
 467  link:RelNotes/1.5.3.txt[1.5.3].
 468
 469* link:v1.5.2.5/git.html[documentation for release 1.5.2.5]
 470
 471* release notes for
 472  link:RelNotes/1.5.2.5.txt[1.5.2.5],
 473  link:RelNotes/1.5.2.4.txt[1.5.2.4],
 474  link:RelNotes/1.5.2.3.txt[1.5.2.3],
 475  link:RelNotes/1.5.2.2.txt[1.5.2.2],
 476  link:RelNotes/1.5.2.1.txt[1.5.2.1],
 477  link:RelNotes/1.5.2.txt[1.5.2].
 478
 479* link:v1.5.1.6/git.html[documentation for release 1.5.1.6]
 480
 481* release notes for
 482  link:RelNotes/1.5.1.6.txt[1.5.1.6],
 483  link:RelNotes/1.5.1.5.txt[1.5.1.5],
 484  link:RelNotes/1.5.1.4.txt[1.5.1.4],
 485  link:RelNotes/1.5.1.3.txt[1.5.1.3],
 486  link:RelNotes/1.5.1.2.txt[1.5.1.2],
 487  link:RelNotes/1.5.1.1.txt[1.5.1.1],
 488  link:RelNotes/1.5.1.txt[1.5.1].
 489
 490* link:v1.5.0.7/git.html[documentation for release 1.5.0.7]
 491
 492* release notes for
 493  link:RelNotes/1.5.0.7.txt[1.5.0.7],
 494  link:RelNotes/1.5.0.6.txt[1.5.0.6],
 495  link:RelNotes/1.5.0.5.txt[1.5.0.5],
 496  link:RelNotes/1.5.0.3.txt[1.5.0.3],
 497  link:RelNotes/1.5.0.2.txt[1.5.0.2],
 498  link:RelNotes/1.5.0.1.txt[1.5.0.1],
 499  link:RelNotes/1.5.0.txt[1.5.0].
 500
 501* documentation for release link:v1.4.4.4/git.html[1.4.4.4],
 502  link:v1.3.3/git.html[1.3.3],
 503  link:v1.2.6/git.html[1.2.6],
 504  link:v1.0.13/git.html[1.0.13].
 505
 506============
 507
 508endif::stalenotes[]
 509
 510OPTIONS
 511-------
 512--version::
 513        Prints the Git suite version that the 'git' program came from.
 514
 515--help::
 516        Prints the synopsis and a list of the most commonly used
 517        commands. If the option '--all' or '-a' is given then all
 518        available commands are printed. If a Git command is named this
 519        option will bring up the manual page for that command.
 520+
 521Other options are available to control how the manual page is
 522displayed. See linkgit:git-help[1] for more information,
 523because `git --help ...` is converted internally into `git
 524help ...`.
 525
 526-C <path>::
 527        Run as if git was started in '<path>' instead of the current working
 528        directory.  When multiple `-C` options are given, each subsequent
 529        non-absolute `-C <path>` is interpreted relative to the preceding `-C
 530        <path>`.
 531+
 532This option affects options that expect path name like `--git-dir` and
 533`--work-tree` in that their interpretations of the path names would be
 534made relative to the working directory caused by the `-C` option. For
 535example the following invocations are equivalent:
 536
 537    git --git-dir=a.git --work-tree=b -C c status
 538    git --git-dir=c/a.git --work-tree=c/b status
 539
 540-c <name>=<value>::
 541        Pass a configuration parameter to the command. The value
 542        given will override values from configuration files.
 543        The <name> is expected in the same format as listed by
 544        'git config' (subkeys separated by dots).
 545+
 546Note that omitting the `=` in `git -c foo.bar ...` is allowed and sets
 547`foo.bar` to the boolean true value (just like `[foo]bar` would in a
 548config file). Including the equals but with an empty value (like `git -c
 549foo.bar= ...`) sets `foo.bar` to the empty string.
 550
 551--exec-path[=<path>]::
 552        Path to wherever your core Git programs are installed.
 553        This can also be controlled by setting the GIT_EXEC_PATH
 554        environment variable. If no path is given, 'git' will print
 555        the current setting and then exit.
 556
 557--html-path::
 558        Print the path, without trailing slash, where Git's HTML
 559        documentation is installed and exit.
 560
 561--man-path::
 562        Print the manpath (see `man(1)`) for the man pages for
 563        this version of Git and exit.
 564
 565--info-path::
 566        Print the path where the Info files documenting this
 567        version of Git are installed and exit.
 568
 569-p::
 570--paginate::
 571        Pipe all output into 'less' (or if set, $PAGER) if standard
 572        output is a terminal.  This overrides the `pager.<cmd>`
 573        configuration options (see the "Configuration Mechanism" section
 574        below).
 575
 576--no-pager::
 577        Do not pipe Git output into a pager.
 578
 579--git-dir=<path>::
 580        Set the path to the repository. This can also be controlled by
 581        setting the `GIT_DIR` environment variable. It can be an absolute
 582        path or relative path to current working directory.
 583
 584--work-tree=<path>::
 585        Set the path to the working tree. It can be an absolute path
 586        or a path relative to the current working directory.
 587        This can also be controlled by setting the GIT_WORK_TREE
 588        environment variable and the core.worktree configuration
 589        variable (see core.worktree in linkgit:git-config[1] for a
 590        more detailed discussion).
 591
 592--namespace=<path>::
 593        Set the Git namespace.  See linkgit:gitnamespaces[7] for more
 594        details.  Equivalent to setting the `GIT_NAMESPACE` environment
 595        variable.
 596
 597--bare::
 598        Treat the repository as a bare repository.  If GIT_DIR
 599        environment is not set, it is set to the current working
 600        directory.
 601
 602--no-replace-objects::
 603        Do not use replacement refs to replace Git objects. See
 604        linkgit:git-replace[1] for more information.
 605
 606--literal-pathspecs::
 607        Treat pathspecs literally (i.e. no globbing, no pathspec magic).
 608        This is equivalent to setting the `GIT_LITERAL_PATHSPECS` environment
 609        variable to `1`.
 610
 611--glob-pathspecs::
 612        Add "glob" magic to all pathspec. This is equivalent to setting
 613        the `GIT_GLOB_PATHSPECS` environment variable to `1`. Disabling
 614        globbing on individual pathspecs can be done using pathspec
 615        magic ":(literal)"
 616
 617--noglob-pathspecs::
 618        Add "literal" magic to all pathspec. This is equivalent to setting
 619        the `GIT_NOGLOB_PATHSPECS` environment variable to `1`. Enabling
 620        globbing on individual pathspecs can be done using pathspec
 621        magic ":(glob)"
 622
 623--icase-pathspecs::
 624        Add "icase" magic to all pathspec. This is equivalent to setting
 625        the `GIT_ICASE_PATHSPECS` environment variable to `1`.
 626
 627GIT COMMANDS
 628------------
 629
 630We divide Git into high level ("porcelain") commands and low level
 631("plumbing") commands.
 632
 633High-level commands (porcelain)
 634-------------------------------
 635
 636We separate the porcelain commands into the main commands and some
 637ancillary user utilities.
 638
 639Main porcelain commands
 640~~~~~~~~~~~~~~~~~~~~~~~
 641
 642include::cmds-mainporcelain.txt[]
 643
 644Ancillary Commands
 645~~~~~~~~~~~~~~~~~~
 646Manipulators:
 647
 648include::cmds-ancillarymanipulators.txt[]
 649
 650Interrogators:
 651
 652include::cmds-ancillaryinterrogators.txt[]
 653
 654
 655Interacting with Others
 656~~~~~~~~~~~~~~~~~~~~~~~
 657
 658These commands are to interact with foreign SCM and with other
 659people via patch over e-mail.
 660
 661include::cmds-foreignscminterface.txt[]
 662
 663
 664Low-level commands (plumbing)
 665-----------------------------
 666
 667Although Git includes its
 668own porcelain layer, its low-level commands are sufficient to support
 669development of alternative porcelains.  Developers of such porcelains
 670might start by reading about linkgit:git-update-index[1] and
 671linkgit:git-read-tree[1].
 672
 673The interface (input, output, set of options and the semantics)
 674to these low-level commands are meant to be a lot more stable
 675than Porcelain level commands, because these commands are
 676primarily for scripted use.  The interface to Porcelain commands
 677on the other hand are subject to change in order to improve the
 678end user experience.
 679
 680The following description divides
 681the low-level commands into commands that manipulate objects (in
 682the repository, index, and working tree), commands that interrogate and
 683compare objects, and commands that move objects and references between
 684repositories.
 685
 686
 687Manipulation commands
 688~~~~~~~~~~~~~~~~~~~~~
 689
 690include::cmds-plumbingmanipulators.txt[]
 691
 692
 693Interrogation commands
 694~~~~~~~~~~~~~~~~~~~~~~
 695
 696include::cmds-plumbinginterrogators.txt[]
 697
 698In general, the interrogate commands do not touch the files in
 699the working tree.
 700
 701
 702Synching repositories
 703~~~~~~~~~~~~~~~~~~~~~
 704
 705include::cmds-synchingrepositories.txt[]
 706
 707The following are helper commands used by the above; end users
 708typically do not use them directly.
 709
 710include::cmds-synchelpers.txt[]
 711
 712
 713Internal helper commands
 714~~~~~~~~~~~~~~~~~~~~~~~~
 715
 716These are internal helper commands used by other commands; end
 717users typically do not use them directly.
 718
 719include::cmds-purehelpers.txt[]
 720
 721
 722Configuration Mechanism
 723-----------------------
 724
 725Git uses a simple text format to store customizations that are per
 726repository and are per user.  Such a configuration file may look
 727like this:
 728
 729------------
 730#
 731# A '#' or ';' character indicates a comment.
 732#
 733
 734; core variables
 735[core]
 736        ; Don't trust file modes
 737        filemode = false
 738
 739; user identity
 740[user]
 741        name = "Junio C Hamano"
 742        email = "gitster@pobox.com"
 743
 744------------
 745
 746Various commands read from the configuration file and adjust
 747their operation accordingly.  See linkgit:git-config[1] for a
 748list and more details about the configuration mechanism.
 749
 750
 751Identifier Terminology
 752----------------------
 753<object>::
 754        Indicates the object name for any type of object.
 755
 756<blob>::
 757        Indicates a blob object name.
 758
 759<tree>::
 760        Indicates a tree object name.
 761
 762<commit>::
 763        Indicates a commit object name.
 764
 765<tree-ish>::
 766        Indicates a tree, commit or tag object name.  A
 767        command that takes a <tree-ish> argument ultimately wants to
 768        operate on a <tree> object but automatically dereferences
 769        <commit> and <tag> objects that point at a <tree>.
 770
 771<commit-ish>::
 772        Indicates a commit or tag object name.  A
 773        command that takes a <commit-ish> argument ultimately wants to
 774        operate on a <commit> object but automatically dereferences
 775        <tag> objects that point at a <commit>.
 776
 777<type>::
 778        Indicates that an object type is required.
 779        Currently one of: `blob`, `tree`, `commit`, or `tag`.
 780
 781<file>::
 782        Indicates a filename - almost always relative to the
 783        root of the tree structure `GIT_INDEX_FILE` describes.
 784
 785Symbolic Identifiers
 786--------------------
 787Any Git command accepting any <object> can also use the following
 788symbolic notation:
 789
 790HEAD::
 791        indicates the head of the current branch.
 792
 793<tag>::
 794        a valid tag 'name'
 795        (i.e. a `refs/tags/<tag>` reference).
 796
 797<head>::
 798        a valid head 'name'
 799        (i.e. a `refs/heads/<head>` reference).
 800
 801For a more complete list of ways to spell object names, see
 802"SPECIFYING REVISIONS" section in linkgit:gitrevisions[7].
 803
 804
 805File/Directory Structure
 806------------------------
 807
 808Please see the linkgit:gitrepository-layout[5] document.
 809
 810Read linkgit:githooks[5] for more details about each hook.
 811
 812Higher level SCMs may provide and manage additional information in the
 813`$GIT_DIR`.
 814
 815
 816Terminology
 817-----------
 818Please see linkgit:gitglossary[7].
 819
 820
 821Environment Variables
 822---------------------
 823Various Git commands use the following environment variables:
 824
 825The Git Repository
 826~~~~~~~~~~~~~~~~~~
 827These environment variables apply to 'all' core Git commands. Nb: it
 828is worth noting that they may be used/overridden by SCMS sitting above
 829Git so take care if using a foreign front-end.
 830
 831`GIT_INDEX_FILE`::
 832        This environment allows the specification of an alternate
 833        index file. If not specified, the default of `$GIT_DIR/index`
 834        is used.
 835
 836`GIT_INDEX_VERSION`::
 837        This environment variable allows the specification of an index
 838        version for new repositories.  It won't affect existing index
 839        files.  By default index file version 2 or 3 is used. See
 840        linkgit:git-update-index[1] for more information.
 841
 842`GIT_OBJECT_DIRECTORY`::
 843        If the object storage directory is specified via this
 844        environment variable then the sha1 directories are created
 845        underneath - otherwise the default `$GIT_DIR/objects`
 846        directory is used.
 847
 848`GIT_ALTERNATE_OBJECT_DIRECTORIES`::
 849        Due to the immutable nature of Git objects, old objects can be
 850        archived into shared, read-only directories. This variable
 851        specifies a ":" separated (on Windows ";" separated) list
 852        of Git object directories which can be used to search for Git
 853        objects. New objects will not be written to these directories.
 854
 855`GIT_DIR`::
 856        If the `GIT_DIR` environment variable is set then it
 857        specifies a path to use instead of the default `.git`
 858        for the base of the repository.
 859        The '--git-dir' command-line option also sets this value.
 860
 861`GIT_WORK_TREE`::
 862        Set the path to the root of the working tree.
 863        This can also be controlled by the '--work-tree' command-line
 864        option and the core.worktree configuration variable.
 865
 866`GIT_NAMESPACE`::
 867        Set the Git namespace; see linkgit:gitnamespaces[7] for details.
 868        The '--namespace' command-line option also sets this value.
 869
 870`GIT_CEILING_DIRECTORIES`::
 871        This should be a colon-separated list of absolute paths.  If
 872        set, it is a list of directories that Git should not chdir up
 873        into while looking for a repository directory (useful for
 874        excluding slow-loading network directories).  It will not
 875        exclude the current working directory or a GIT_DIR set on the
 876        command line or in the environment.  Normally, Git has to read
 877        the entries in this list and resolve any symlink that
 878        might be present in order to compare them with the current
 879        directory.  However, if even this access is slow, you
 880        can add an empty entry to the list to tell Git that the
 881        subsequent entries are not symlinks and needn't be resolved;
 882        e.g.,
 883        `GIT_CEILING_DIRECTORIES=/maybe/symlink::/very/slow/non/symlink`.
 884
 885`GIT_DISCOVERY_ACROSS_FILESYSTEM`::
 886        When run in a directory that does not have ".git" repository
 887        directory, Git tries to find such a directory in the parent
 888        directories to find the top of the working tree, but by default it
 889        does not cross filesystem boundaries.  This environment variable
 890        can be set to true to tell Git not to stop at filesystem
 891        boundaries.  Like `GIT_CEILING_DIRECTORIES`, this will not affect
 892        an explicit repository directory set via `GIT_DIR` or on the
 893        command line.
 894
 895`GIT_COMMON_DIR`::
 896        If this variable is set to a path, non-worktree files that are
 897        normally in $GIT_DIR will be taken from this path
 898        instead. Worktree-specific files such as HEAD or index are
 899        taken from $GIT_DIR. See linkgit:gitrepository-layout[5] and
 900        linkgit:git-worktree[1] for
 901        details. This variable has lower precedence than other path
 902        variables such as GIT_INDEX_FILE, GIT_OBJECT_DIRECTORY...
 903
 904Git Commits
 905~~~~~~~~~~~
 906`GIT_AUTHOR_NAME`::
 907`GIT_AUTHOR_EMAIL`::
 908`GIT_AUTHOR_DATE`::
 909`GIT_COMMITTER_NAME`::
 910`GIT_COMMITTER_EMAIL`::
 911`GIT_COMMITTER_DATE`::
 912'EMAIL'::
 913        see linkgit:git-commit-tree[1]
 914
 915Git Diffs
 916~~~~~~~~~
 917`GIT_DIFF_OPTS`::
 918        Only valid setting is "--unified=??" or "-u??" to set the
 919        number of context lines shown when a unified diff is created.
 920        This takes precedence over any "-U" or "--unified" option
 921        value passed on the Git diff command line.
 922
 923`GIT_EXTERNAL_DIFF`::
 924        When the environment variable `GIT_EXTERNAL_DIFF` is set, the
 925        program named by it is called, instead of the diff invocation
 926        described above.  For a path that is added, removed, or modified,
 927        `GIT_EXTERNAL_DIFF` is called with 7 parameters:
 928
 929        path old-file old-hex old-mode new-file new-hex new-mode
 930+
 931where:
 932
 933        <old|new>-file:: are files GIT_EXTERNAL_DIFF can use to read the
 934                         contents of <old|new>,
 935        <old|new>-hex:: are the 40-hexdigit SHA-1 hashes,
 936        <old|new>-mode:: are the octal representation of the file modes.
 937+
 938The file parameters can point at the user's working file
 939(e.g. `new-file` in "git-diff-files"), `/dev/null` (e.g. `old-file`
 940when a new file is added), or a temporary file (e.g. `old-file` in the
 941index).  `GIT_EXTERNAL_DIFF` should not worry about unlinking the
 942temporary file --- it is removed when `GIT_EXTERNAL_DIFF` exits.
 943+
 944For a path that is unmerged, `GIT_EXTERNAL_DIFF` is called with 1
 945parameter, <path>.
 946+
 947For each path `GIT_EXTERNAL_DIFF` is called, two environment variables,
 948`GIT_DIFF_PATH_COUNTER` and `GIT_DIFF_PATH_TOTAL` are set.
 949
 950`GIT_DIFF_PATH_COUNTER`::
 951        A 1-based counter incremented by one for every path.
 952
 953`GIT_DIFF_PATH_TOTAL`::
 954        The total number of paths.
 955
 956other
 957~~~~~
 958`GIT_MERGE_VERBOSITY`::
 959        A number controlling the amount of output shown by
 960        the recursive merge strategy.  Overrides merge.verbosity.
 961        See linkgit:git-merge[1]
 962
 963`GIT_PAGER`::
 964        This environment variable overrides `$PAGER`. If it is set
 965        to an empty string or to the value "cat", Git will not launch
 966        a pager.  See also the `core.pager` option in
 967        linkgit:git-config[1].
 968
 969`GIT_EDITOR`::
 970        This environment variable overrides `$EDITOR` and `$VISUAL`.
 971        It is used by several Git commands when, on interactive mode,
 972        an editor is to be launched. See also linkgit:git-var[1]
 973        and the `core.editor` option in linkgit:git-config[1].
 974
 975`GIT_SSH`::
 976`GIT_SSH_COMMAND`::
 977        If either of these environment variables is set then 'git fetch'
 978        and 'git push' will use the specified command instead of 'ssh'
 979        when they need to connect to a remote system.
 980        The command will be given exactly two or four arguments: the
 981        'username@host' (or just 'host') from the URL and the shell
 982        command to execute on that remote system, optionally preceded by
 983        '-p' (literally) and the 'port' from the URL when it specifies
 984        something other than the default SSH port.
 985+
 986`$GIT_SSH_COMMAND` takes precedence over `$GIT_SSH`, and is interpreted
 987by the shell, which allows additional arguments to be included.
 988`$GIT_SSH` on the other hand must be just the path to a program
 989(which can be a wrapper shell script, if additional arguments are
 990needed).
 991+
 992Usually it is easier to configure any desired options through your
 993personal `.ssh/config` file.  Please consult your ssh documentation
 994for further details.
 995
 996`GIT_ASKPASS`::
 997        If this environment variable is set, then Git commands which need to
 998        acquire passwords or passphrases (e.g. for HTTP or IMAP authentication)
 999        will call this program with a suitable prompt as command-line argument
1000        and read the password from its STDOUT. See also the `core.askPass`
1001        option in linkgit:git-config[1].
1002
1003`GIT_TERMINAL_PROMPT`::
1004        If this environment variable is set to `0`, git will not prompt
1005        on the terminal (e.g., when asking for HTTP authentication).
1006
1007`GIT_CONFIG_NOSYSTEM`::
1008        Whether to skip reading settings from the system-wide
1009        `$(prefix)/etc/gitconfig` file.  This environment variable can
1010        be used along with `$HOME` and `$XDG_CONFIG_HOME` to create a
1011        predictable environment for a picky script, or you can set it
1012        temporarily to avoid using a buggy `/etc/gitconfig` file while
1013        waiting for someone with sufficient permissions to fix it.
1014
1015`GIT_FLUSH`::
1016        If this environment variable is set to "1", then commands such
1017        as 'git blame' (in incremental mode), 'git rev-list', 'git log',
1018        'git check-attr' and 'git check-ignore' will
1019        force a flush of the output stream after each record have been
1020        flushed. If this
1021        variable is set to "0", the output of these commands will be done
1022        using completely buffered I/O.   If this environment variable is
1023        not set, Git will choose buffered or record-oriented flushing
1024        based on whether stdout appears to be redirected to a file or not.
1025
1026`GIT_TRACE`::
1027        Enables general trace messages, e.g. alias expansion, built-in
1028        command execution and external command execution.
1029+
1030If this variable is set to "1", "2" or "true" (comparison
1031is case insensitive), trace messages will be printed to
1032stderr.
1033+
1034If the variable is set to an integer value greater than 2
1035and lower than 10 (strictly) then Git will interpret this
1036value as an open file descriptor and will try to write the
1037trace messages into this file descriptor.
1038+
1039Alternatively, if the variable is set to an absolute path
1040(starting with a '/' character), Git will interpret this
1041as a file path and will try to write the trace messages
1042into it.
1043+
1044Unsetting the variable, or setting it to empty, "0" or
1045"false" (case insensitive) disables trace messages.
1046
1047`GIT_TRACE_PACK_ACCESS`::
1048        Enables trace messages for all accesses to any packs. For each
1049        access, the pack file name and an offset in the pack is
1050        recorded. This may be helpful for troubleshooting some
1051        pack-related performance problems.
1052        See `GIT_TRACE` for available trace output options.
1053
1054`GIT_TRACE_PACKET`::
1055        Enables trace messages for all packets coming in or out of a
1056        given program. This can help with debugging object negotiation
1057        or other protocol issues. Tracing is turned off at a packet
1058        starting with "PACK" (but see `GIT_TRACE_PACKFILE` below).
1059        See `GIT_TRACE` for available trace output options.
1060
1061`GIT_TRACE_PACKFILE`::
1062        Enables tracing of packfiles sent or received by a
1063        given program. Unlike other trace output, this trace is
1064        verbatim: no headers, and no quoting of binary data. You almost
1065        certainly want to direct into a file (e.g.,
1066        `GIT_TRACE_PACKFILE=/tmp/my.pack`) rather than displaying it on
1067        the terminal or mixing it with other trace output.
1068+
1069Note that this is currently only implemented for the client side
1070of clones and fetches.
1071
1072`GIT_TRACE_PERFORMANCE`::
1073        Enables performance related trace messages, e.g. total execution
1074        time of each Git command.
1075        See `GIT_TRACE` for available trace output options.
1076
1077`GIT_TRACE_SETUP`::
1078        Enables trace messages printing the .git, working tree and current
1079        working directory after Git has completed its setup phase.
1080        See `GIT_TRACE` for available trace output options.
1081
1082`GIT_TRACE_SHALLOW`::
1083        Enables trace messages that can help debugging fetching /
1084        cloning of shallow repositories.
1085        See `GIT_TRACE` for available trace output options.
1086
1087`GIT_TRACE_CURL`::
1088        Enables a curl full trace dump of all incoming and outgoing data,
1089        including descriptive information, of the git transport protocol.
1090        This is similar to doing curl `--trace-ascii` on the command line.
1091        This option overrides setting the `GIT_CURL_VERBOSE` environment
1092        variable.
1093        See `GIT_TRACE` for available trace output options.
1094
1095`GIT_LITERAL_PATHSPECS`::
1096        Setting this variable to `1` will cause Git to treat all
1097        pathspecs literally, rather than as glob patterns. For example,
1098        running `GIT_LITERAL_PATHSPECS=1 git log -- '*.c'` will search
1099        for commits that touch the path `*.c`, not any paths that the
1100        glob `*.c` matches. You might want this if you are feeding
1101        literal paths to Git (e.g., paths previously given to you by
1102        `git ls-tree`, `--raw` diff output, etc).
1103
1104`GIT_GLOB_PATHSPECS`::
1105        Setting this variable to `1` will cause Git to treat all
1106        pathspecs as glob patterns (aka "glob" magic).
1107
1108`GIT_NOGLOB_PATHSPECS`::
1109        Setting this variable to `1` will cause Git to treat all
1110        pathspecs as literal (aka "literal" magic).
1111
1112`GIT_ICASE_PATHSPECS`::
1113        Setting this variable to `1` will cause Git to treat all
1114        pathspecs as case-insensitive.
1115
1116`GIT_REFLOG_ACTION`::
1117        When a ref is updated, reflog entries are created to keep
1118        track of the reason why the ref was updated (which is
1119        typically the name of the high-level command that updated
1120        the ref), in addition to the old and new values of the ref.
1121        A scripted Porcelain command can use set_reflog_action
1122        helper function in `git-sh-setup` to set its name to this
1123        variable when it is invoked as the top level command by the
1124        end user, to be recorded in the body of the reflog.
1125
1126`GIT_REF_PARANOIA`::
1127        If set to `1`, include broken or badly named refs when iterating
1128        over lists of refs. In a normal, non-corrupted repository, this
1129        does nothing. However, enabling it may help git to detect and
1130        abort some operations in the presence of broken refs. Git sets
1131        this variable automatically when performing destructive
1132        operations like linkgit:git-prune[1]. You should not need to set
1133        it yourself unless you want to be paranoid about making sure
1134        an operation has touched every ref (e.g., because you are
1135        cloning a repository to make a backup).
1136
1137`GIT_ALLOW_PROTOCOL`::
1138        If set, provide a colon-separated list of protocols which are
1139        allowed to be used with fetch/push/clone. This is useful to
1140        restrict recursive submodule initialization from an untrusted
1141        repository. Any protocol not mentioned will be disallowed (i.e.,
1142        this is a whitelist, not a blacklist). If the variable is not
1143        set at all, all protocols are enabled.  The protocol names
1144        currently used by git are:
1145
1146          - `file`: any local file-based path (including `file://` URLs,
1147            or local paths)
1148
1149          - `git`: the anonymous git protocol over a direct TCP
1150            connection (or proxy, if configured)
1151
1152          - `ssh`: git over ssh (including `host:path` syntax,
1153            `ssh://`, etc).
1154
1155          - `http`: git over http, both "smart http" and "dumb http".
1156            Note that this does _not_ include `https`; if you want both,
1157            you should specify both as `http:https`.
1158
1159          - any external helpers are named by their protocol (e.g., use
1160            `hg` to allow the `git-remote-hg` helper)
1161
1162
1163Discussion[[Discussion]]
1164------------------------
1165
1166More detail on the following is available from the
1167link:user-manual.html#git-concepts[Git concepts chapter of the
1168user-manual] and linkgit:gitcore-tutorial[7].
1169
1170A Git project normally consists of a working directory with a ".git"
1171subdirectory at the top level.  The .git directory contains, among other
1172things, a compressed object database representing the complete history
1173of the project, an "index" file which links that history to the current
1174contents of the working tree, and named pointers into that history such
1175as tags and branch heads.
1176
1177The object database contains objects of three main types: blobs, which
1178hold file data; trees, which point to blobs and other trees to build up
1179directory hierarchies; and commits, which each reference a single tree
1180and some number of parent commits.
1181
1182The commit, equivalent to what other systems call a "changeset" or
1183"version", represents a step in the project's history, and each parent
1184represents an immediately preceding step.  Commits with more than one
1185parent represent merges of independent lines of development.
1186
1187All objects are named by the SHA-1 hash of their contents, normally
1188written as a string of 40 hex digits.  Such names are globally unique.
1189The entire history leading up to a commit can be vouched for by signing
1190just that commit.  A fourth object type, the tag, is provided for this
1191purpose.
1192
1193When first created, objects are stored in individual files, but for
1194efficiency may later be compressed together into "pack files".
1195
1196Named pointers called refs mark interesting points in history.  A ref
1197may contain the SHA-1 name of an object or the name of another ref.  Refs
1198with names beginning `ref/head/` contain the SHA-1 name of the most
1199recent commit (or "head") of a branch under development.  SHA-1 names of
1200tags of interest are stored under `ref/tags/`.  A special ref named
1201`HEAD` contains the name of the currently checked-out branch.
1202
1203The index file is initialized with a list of all paths and, for each
1204path, a blob object and a set of attributes.  The blob object represents
1205the contents of the file as of the head of the current branch.  The
1206attributes (last modified time, size, etc.) are taken from the
1207corresponding file in the working tree.  Subsequent changes to the
1208working tree can be found by comparing these attributes.  The index may
1209be updated with new content, and new commits may be created from the
1210content stored in the index.
1211
1212The index is also capable of storing multiple entries (called "stages")
1213for a given pathname.  These stages are used to hold the various
1214unmerged version of a file when a merge is in progress.
1215
1216FURTHER DOCUMENTATION
1217---------------------
1218
1219See the references in the "description" section to get started
1220using Git.  The following is probably more detail than necessary
1221for a first-time user.
1222
1223The link:user-manual.html#git-concepts[Git concepts chapter of the
1224user-manual] and linkgit:gitcore-tutorial[7] both provide
1225introductions to the underlying Git architecture.
1226
1227See linkgit:gitworkflows[7] for an overview of recommended workflows.
1228
1229See also the link:howto-index.html[howto] documents for some useful
1230examples.
1231
1232The internals are documented in the
1233link:technical/api-index.html[Git API documentation].
1234
1235Users migrating from CVS may also want to
1236read linkgit:gitcvs-migration[7].
1237
1238
1239Authors
1240-------
1241Git was started by Linus Torvalds, and is currently maintained by Junio
1242C Hamano. Numerous contributions have come from the Git mailing list
1243<git@vger.kernel.org>.  http://www.openhub.net/p/git/contributors/summary
1244gives you a more complete list of contributors.
1245
1246If you have a clone of git.git itself, the
1247output of linkgit:git-shortlog[1] and linkgit:git-blame[1] can show you
1248the authors for specific parts of the project.
1249
1250Reporting Bugs
1251--------------
1252
1253Report bugs to the Git mailing list <git@vger.kernel.org> where the
1254development and maintenance is primarily done.  You do not have to be
1255subscribed to the list to send a message there.
1256
1257SEE ALSO
1258--------
1259linkgit:gittutorial[7], linkgit:gittutorial-2[7],
1260linkgit:giteveryday[7], linkgit:gitcvs-migration[7],
1261linkgit:gitglossary[7], linkgit:gitcore-tutorial[7],
1262linkgit:gitcli[7], link:user-manual.html[The Git User's Manual],
1263linkgit:gitworkflows[7]
1264
1265GIT
1266---
1267Part of the linkgit:git[1] suite