Documentation/git-for-each-ref.txt

   1 git-for-each-ref(1)
   2 ===================
   3
   4 NAME
   5 ----
   6 git-for-each-ref - Output information on each ref
   7
   8 SYNOPSIS
   9 --------
  10 [verse]
  11 'git for-each-ref' [--count=<count>] [--shell|--perl|--python|--tcl]
  12                    [(--sort=<key>)...] [--format=<format>] [<pattern>...]
  13                    [--points-at=<object>]
  14                    [--merged[=<object>]] [--no-merged[=<object>]]
  15                    [--contains[=<object>]] [--no-contains[=<object>]]
  16
  17 DESCRIPTION
  18 -----------
  19
  20 Iterate over all refs that match `<pattern>` and show them
  21 according to the given `<format>`, after sorting them according
  22 to the given set of `<key>`.  If `<count>` is given, stop after
  23 showing that many refs.  The interpolated values in `<format>`
  24 can optionally be quoted as string literals in the specified
  25 host language allowing their direct evaluation in that language.
  26
  27 OPTIONS
  28 -------
  29 <pattern>...::
  30         If one or more patterns are given, only refs are shown that
  31         match against at least one pattern, either using fnmatch(3) or
  32         literally, in the latter case matching completely or from the
  33         beginning up to a slash.
  34
  35 --count=<count>::
  36         By default the command shows all refs that match
  37         `<pattern>`.  This option makes it stop after showing
  38         that many refs.
  39
  40 --sort=<key>::
  41         A field name to sort on.  Prefix `-` to sort in
  42         descending order of the value.  When unspecified,
  43         `refname` is used.  You may use the --sort=<key> option
  44         multiple times, in which case the last key becomes the primary
  45         key.
  46
  47 --format=<format>::
  48         A string that interpolates `%(fieldname)` from a ref being shown
  49         and the object it points at.  If `fieldname`
  50         is prefixed with an asterisk (`*`) and the ref points
  51         at a tag object, use the value for the field in the object
  52         which the tag object refers to (instead of the field in the tag object).
  53         When unspecified, `<format>` defaults to
  54         `%(objectname) SPC %(objecttype) TAB %(refname)`.
  55         It also interpolates `%%` to `%`, and `%xx` where `xx`
  56         are hex digits interpolates to character with hex code
  57         `xx`; for example `%00` interpolates to `\0` (NUL),
  58         `%09` to `\t` (TAB) and `%0a` to `\n` (LF).
  59
  60 --color[=<when>]::
  61         Respect any colors specified in the `--format` option. The
  62         `<when>` field must be one of `always`, `never`, or `auto` (if
  63         `<when>` is absent, behave as if `always` was given).
  64
  65 --shell::
  66 --perl::
  67 --python::
  68 --tcl::
  69         If given, strings that substitute `%(fieldname)`
  70         placeholders are quoted as string literals suitable for
  71         the specified host language.  This is meant to produce
  72         a scriptlet that can directly be `eval`ed.
  73
  74 --points-at=<object>::
  75         Only list refs which points at the given object.
  76
  77 --merged[=<object>]::
  78         Only list refs whose tips are reachable from the
  79         specified commit (HEAD if not specified).
  80
  81 --no-merged[=<object>]::
  82         Only list refs whose tips are not reachable from the
  83         specified commit (HEAD if not specified).
  84
  85 --contains[=<object>]::
  86         Only list refs which contain the specified commit (HEAD if not
  87         specified).
  88
  89 --no-contains[=<object>]::
  90         Only list refs which don't contain the specified commit (HEAD
  91         if not specified).
  92
  93 --ignore-case::
  94         Sorting and filtering refs are case insensitive.
  95
  96 FIELD NAMES
  97 -----------
  98
  99 Various values from structured fields in referenced objects can
 100 be used to interpolate into the resulting output, or as sort
 101 keys.
 102
 103 For all objects, the following names can be used:
 104
 105 refname::
 106         The name of the ref (the part after $GIT_DIR/).
 107         For a non-ambiguous short name of the ref append `:short`.
 108         The option core.warnAmbiguousRefs is used to select the strict
 109         abbreviation mode. If `lstrip=<N>` (`rstrip=<N>`) is appended, strips `<N>`
 110         slash-separated path components from the front (back) of the refname
 111         (e.g. `%(refname:lstrip=2)` turns `refs/tags/foo` into `foo` and
 112         `%(refname:rstrip=2)` turns `refs/tags/foo` into `refs`).
 113         If `<N>` is a negative number, strip as many path components as
 114         necessary from the specified end to leave `-<N>` path components
 115         (e.g. `%(refname:lstrip=-2)` turns
 116         `refs/tags/foo` into `tags/foo` and `%(refname:rstrip=-1)`
 117         turns `refs/tags/foo` into `refs`). When the ref does not have
 118         enough components, the result becomes an empty string if
 119         stripping with positive <N>, or it becomes the full refname if
 120         stripping with negative <N>.  Neither is an error.
 121 +
 122 `strip` can be used as a synonym to `lstrip`.
 123
 124 objecttype::
 125         The type of the object (`blob`, `tree`, `commit`, `tag`).
 126
 127 objectsize::
 128         The size of the object (the same as 'git cat-file -s' reports).
 129         Append `:disk` to get the size, in bytes, that the object takes up on
 130         disk. See the note about on-disk sizes in the `CAVEATS` section below.
 131 objectname::
 132         The object name (aka SHA-1).
 133         For a non-ambiguous abbreviation of the object name append `:short`.
 134         For an abbreviation of the object name with desired length append
 135         `:short=<length>`, where the minimum length is MINIMUM_ABBREV. The
 136         length may be exceeded to ensure unique object names.
 137 deltabase::
 138         This expands to the object name of the delta base for the
 139         given object, if it is stored as a delta.  Otherwise it
 140         expands to the null object name (all zeroes).
 141
 142 upstream::
 143         The name of a local ref which can be considered ``upstream''
 144         from the displayed ref. Respects `:short`, `:lstrip` and
 145         `:rstrip` in the same way as `refname` above.  Additionally
 146         respects `:track` to show "[ahead N, behind M]" and
 147         `:trackshort` to show the terse version: ">" (ahead), "<"
 148         (behind), "<>" (ahead and behind), or "=" (in sync). `:track`
 149         also prints "[gone]" whenever unknown upstream ref is
 150         encountered. Append `:track,nobracket` to show tracking
 151         information without brackets (i.e "ahead N, behind M").
 152 +
 153 For any remote-tracking branch `%(upstream)`, `%(upstream:remotename)`
 154 and `%(upstream:remoteref)` refer to the name of the remote and the
 155 name of the tracked remote ref, respectively. In other words, the
 156 remote-tracking branch can be updated explicitly and individually by
 157 using the refspec `%(upstream:remoteref):%(upstream)` to fetch from
 158 `%(upstream:remotename)`.
 159 +
 160 Has no effect if the ref does not have tracking information associated
 161 with it.  All the options apart from `nobracket` are mutually exclusive,
 162 but if used together the last option is selected.
 163
 164 push::
 165         The name of a local ref which represents the `@{push}`
 166         location for the displayed ref. Respects `:short`, `:lstrip`,
 167         `:rstrip`, `:track`, `:trackshort`, `:remotename`, and `:remoteref`
 168         options as `upstream` does. Produces an empty string if no `@{push}`
 169         ref is configured.
 170
 171 HEAD::
 172         '*' if HEAD matches current ref (the checked out branch), ' '
 173         otherwise.
 174
 175 color::
 176         Change output color. Followed by `:<colorname>`, where color
 177         names are described under Values in the "CONFIGURATION FILE"
 178         section of linkgit:git-config[1].  For example,
 179         `%(color:bold red)`.
 180
 181 align::
 182         Left-, middle-, or right-align the content between
 183         %(align:...) and %(end). The "align:" is followed by
 184         `width=<width>` and `position=<position>` in any order
 185         separated by a comma, where the `<position>` is either left,
 186         right or middle, default being left and `<width>` is the total
 187         length of the content with alignment. For brevity, the
 188         "width=" and/or "position=" prefixes may be omitted, and bare
 189         <width> and <position> used instead.  For instance,
 190         `%(align:<width>,<position>)`. If the contents length is more
 191         than the width then no alignment is performed. If used with
 192         `--quote` everything in between %(align:...) and %(end) is
 193         quoted, but if nested then only the topmost level performs
 194         quoting.
 195
 196 if::
 197         Used as %(if)...%(then)...%(end) or
 198         %(if)...%(then)...%(else)...%(end).  If there is an atom with
 199         value or string literal after the %(if) then everything after
 200         the %(then) is printed, else if the %(else) atom is used, then
 201         everything after %(else) is printed. We ignore space when
 202         evaluating the string before %(then), this is useful when we
 203         use the %(HEAD) atom which prints either "*" or " " and we
 204         want to apply the 'if' condition only on the 'HEAD' ref.
 205         Append ":equals=<string>" or ":notequals=<string>" to compare
 206         the value between the %(if:...) and %(then) atoms with the
 207         given string.
 208
 209 symref::
 210         The ref which the given symbolic ref refers to. If not a
 211         symbolic ref, nothing is printed. Respects the `:short`,
 212         `:lstrip` and `:rstrip` options in the same way as `refname`
 213         above.
 214
 215 worktreepath::
 216         The absolute path to the worktree in which the ref is checked
 217         out, if it is checked out in any linked worktree. Empty string
 218         otherwise.
 219
 220 In addition to the above, for commit and tag objects, the header
 221 field names (`tree`, `parent`, `object`, `type`, and `tag`) can
 222 be used to specify the value in the header field.
 223 Fields `tree` and `parent` can also be used with modifier `:short` and
 224 `:short=<length>` just like `objectname`.
 225
 226 For commit and tag objects, the special `creatordate` and `creator`
 227 fields will correspond to the appropriate date or name-email-date tuple
 228 from the `committer` or `tagger` fields depending on the object type.
 229 These are intended for working on a mix of annotated and lightweight tags.
 230
 231 Fields that have name-email-date tuple as its value (`author`,
 232 `committer`, and `tagger`) can be suffixed with `name`, `email`,
 233 and `date` to extract the named component.  For email fields (`authoremail`,
 234 `committeremail` and `taggeremail`), `:trim` can be appended to get the email
 235 without angle brackets, and `:localpart` to get the part before the `@` symbol
 236 out of the trimmed email.
 237
 238 The message in a commit or a tag object is `contents`, from which
 239 `contents:<part>` can be used to extract various parts out of:
 240
 241 contents:size::
 242         The size in bytes of the commit or tag message.
 243
 244 contents:subject::
 245         The first paragraph of the message, which typically is a
 246         single line, is taken as the "subject" of the commit or the
 247         tag message.
 248         Instead of `contents:subject`, field `subject` can also be used to
 249         obtain same results. `:sanitize` can be appended to `subject` for
 250         subject line suitable for filename.
 251
 252 contents:body::
 253         The remainder of the commit or the tag message that follows
 254         the "subject".
 255
 256 contents:signature::
 257         The optional GPG signature of the tag.
 258
 259 contents:lines=N::
 260         The first `N` lines of the message.
 261
 262 Additionally, the trailers as interpreted by linkgit:git-interpret-trailers[1]
 263 are obtained as `trailers` (or by using the historical alias
 264 `contents:trailers`).  Non-trailer lines from the trailer block can be omitted
 265 with `trailers:only`. Whitespace-continuations can be removed from trailers so
 266 that each trailer appears on a line by itself with its full content with
 267 `trailers:unfold`. Both can be used together as `trailers:unfold,only`.
 268
 269 For sorting purposes, fields with numeric values sort in numeric order
 270 (`objectsize`, `authordate`, `committerdate`, `creatordate`, `taggerdate`).
 271 All other fields are used to sort in their byte-value order.
 272
 273 There is also an option to sort by versions, this can be done by using
 274 the fieldname `version:refname` or its alias `v:refname`.
 275
 276 In any case, a field name that refers to a field inapplicable to
 277 the object referred by the ref does not cause an error.  It
 278 returns an empty string instead.
 279
 280 As a special case for the date-type fields, you may specify a format for
 281 the date by adding `:` followed by date format name (see the
 282 values the `--date` option to linkgit:git-rev-list[1] takes).
 283
 284 Some atoms like %(align) and %(if) always require a matching %(end).
 285 We call them "opening atoms" and sometimes denote them as %($open).
 286
 287 When a scripting language specific quoting is in effect, everything
 288 between a top-level opening atom and its matching %(end) is evaluated
 289 according to the semantics of the opening atom and only its result
 290 from the top-level is quoted.
 291
 292
 293 EXAMPLES
 294 --------
 295
 296 An example directly producing formatted text.  Show the most recent
 297 3 tagged commits:
 298
 299 ------------
 300 #!/bin/sh
 301
 302 git for-each-ref --count=3 --sort='-*authordate' \
 303 --format='From: %(*authorname) %(*authoremail)
 304 Subject: %(*subject)
 305 Date: %(*authordate)
 306 Ref: %(*refname)
 307
 308 %(*body)
 309 ' 'refs/tags'
 310 ------------
 311
 312
 313 A simple example showing the use of shell eval on the output,
 314 demonstrating the use of --shell.  List the prefixes of all heads:
 315 ------------
 316 #!/bin/sh
 317
 318 git for-each-ref --shell --format="ref=%(refname)" refs/heads | \
 319 while read entry
 320 do
 321         eval "$entry"
 322         echo `dirname $ref`
 323 done
 324 ------------
 325
 326
 327 A bit more elaborate report on tags, demonstrating that the format
 328 may be an entire script:
 329 ------------
 330 #!/bin/sh
 331
 332 fmt='
 333         r=%(refname)
 334         t=%(*objecttype)
 335         T=${r#refs/tags/}
 336
 337         o=%(*objectname)
 338         n=%(*authorname)
 339         e=%(*authoremail)
 340         s=%(*subject)
 341         d=%(*authordate)
 342         b=%(*body)
 343
 344         kind=Tag
 345         if test "z$t" = z
 346         then
 347                 # could be a lightweight tag
 348                 t=%(objecttype)
 349                 kind="Lightweight tag"
 350                 o=%(objectname)
 351                 n=%(authorname)
 352                 e=%(authoremail)
 353                 s=%(subject)
 354                 d=%(authordate)
 355                 b=%(body)
 356         fi
 357         echo "$kind $T points at a $t object $o"
 358         if test "z$t" = zcommit
 359         then
 360                 echo "The commit was authored by $n $e
 361 at $d, and titled
 362
 363     $s
 364
 365 Its message reads as:
 366 "
 367                 echo "$b" | sed -e "s/^/    /"
 368                 echo
 369         fi
 370 '
 371
 372 eval=`git for-each-ref --shell --format="$fmt" \
 373         --sort='*objecttype' \
 374         --sort=-taggerdate \
 375         refs/tags`
 376 eval "$eval"
 377 ------------
 378
 379
 380 An example to show the usage of %(if)...%(then)...%(else)...%(end).
 381 This prefixes the current branch with a star.
 382
 383 ------------
 384 git for-each-ref --format="%(if)%(HEAD)%(then)* %(else)  %(end)%(refname:short)" refs/heads/
 385 ------------
 386
 387
 388 An example to show the usage of %(if)...%(then)...%(end).
 389 This prints the authorname, if present.
 390
 391 ------------
 392 git for-each-ref --format="%(refname)%(if)%(authorname)%(then) Authored by: %(authorname)%(end)"
 393 ------------
 394
 395 CAVEATS
 396 -------
 397
 398 Note that the sizes of objects on disk are reported accurately, but care
 399 should be taken in drawing conclusions about which refs or objects are
 400 responsible for disk usage. The size of a packed non-delta object may be
 401 much larger than the size of objects which delta against it, but the
 402 choice of which object is the base and which is the delta is arbitrary
 403 and is subject to change during a repack.
 404
 405 Note also that multiple copies of an object may be present in the object
 406 database; in this case, it is undefined which copy's size or delta base
 407 will be reported.
 408
 409 NOTES
 410 -----
 411
 412 include::ref-reachability-filters.txt[]
 413
 414 SEE ALSO
 415 --------
 416 linkgit:git-show-ref[1]
 417
 418 GIT
 419 ---
 420 Part of the linkgit:git[1] suite