taskd/mail.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2007 Andy Parkins
   4 #
   5 # An example hook script to mail out commit update information.  This hook
   6 # sends emails listing new revisions to the repository introduced by the
   7 # change being reported.  The rule is that (for branch updates) each commit
   8 # will appear on one email and one email only.
   9 #
  10 # =================
  11 # This is Girocco-customized version. No matter what is said below, it has
  12 # following changes:
  13 # * Calling with arguments is same as giving them on stdin.
  14 # * Optional fourth parameter is project name, used at most places instead
  15 #   of description.
  16 # * Optional fifth parameter is email sender.
  17 # * Load shlib.
  18 # * Default subject prefix is site name.
  19 # * Unsubscribe instructions in email footer.
  20 # * Default showrev includes gitweb link and show -C.
  21 # * Nicer subject line.
  22 # * Limit mail size to 256kb.
  23 # =================
  24 #
  25 # This hook is stored in the contrib/hooks directory.  Your distribution
  26 # will have put this somewhere standard.  You should make this script
  27 # executable then link to it in the repository you would like to use it in.
  28 # For example, on debian the hook is stored in
  29 # /usr/share/git-core/contrib/hooks/post-receive-email:
  30 #
  31 #  chmod a+x post-receive-email
  32 #  cd /path/to/your/repository.git
  33 #  ln -sf /usr/share/git-core/contrib/hooks/post-receive-email hooks/post-receive
  34 #
  35 # This hook script assumes it is enabled on the central repository of a
  36 # project, with all users pushing only to it and not between each other.  It
  37 # will still work if you don't operate in that style, but it would become
  38 # possible for the email to be from someone other than the person doing the
  39 # push.
  40 #
  41 # Config
  42 # ------
  43 # hooks.mailinglist
  44 #   This is the list that all pushes will go to; leave it blank to not send
  45 #   emails for every ref update.
  46 # hooks.announcelist
  47 #   This is the list that all pushes of annotated tags will go to.  Leave it
  48 #   blank to default to the mailinglist field.  The announce emails lists
  49 #   the short log summary of the changes since the last annotated tag.
  50 # hooks.envelopesender
  51 #   If set then the -f option is passed to sendmail to allow the envelope
  52 #   sender address to be set
  53 # hooks.emailprefix
  54 #   All emails have their subjects prefixed with this prefix, or "[SCM]"
  55 #   if emailprefix is unset, to aid filtering
  56 # hooks.showrev
  57 #   The shell command used to format each revision in the email, with
  58 #   "%s" replaced with the commit id.  Defaults to "git rev-list -1
  59 #   --pretty %s", displaying the commit id, author, date and log
  60 #   message.  To list full patches separated by a blank line, you
  61 #   could set this to "git show -C %s; echo".
  62 #   To list a gitweb/cgit URL *and* a full patch for each change set, use this:
  63 #     "t=%s; printf 'http://.../?id=%%s' \$t; echo;echo; git show -C \$t; echo"
  64 #   Be careful if "..." contains things that will be expanded by shell "eval"
  65 #   or printf.
  66 #
  67 # Notes
  68 # -----
  69 # All emails include the headers "X-Git-Refname", "X-Git-Oldrev",
  70 # "X-Git-Newrev", and "X-Git-Reftype" to enable fine tuned filtering and
  71 # give information for debugging.
  72 #
  73
  74 # ---------------------------- Functions
  75
  76 #
  77 # Function to output arguments without interpretation followed by \n
  78 #
  79 echol()
  80 {
  81         printf '%s\n' "$*"
  82 }
  83
  84 #
  85 # Function to prepare for email generation. This decides what type
  86 # of update this is and whether an email should even be generated.
  87 #
  88 prep_for_email()
  89 {
  90         # --- Arguments
  91         oldrev=$(git rev-parse $1)
  92         newrev=$(git rev-parse $2)
  93         refname="$3"
  94
  95         # --- Interpret
  96         # 0000->1234 (create)
  97         # 1234->2345 (update)
  98         # 2345->0000 (delete)
  99         if expr "$oldrev" : '0*$' >/dev/null
 100         then
 101                 change_type="create"
 102         else
 103                 if expr "$newrev" : '0*$' >/dev/null
 104                 then
 105                         change_type="delete"
 106                 else
 107                         change_type="update"
 108                 fi
 109         fi
 110
 111         # --- Get the revision types
 112         newrev_type=$(git cat-file -t $newrev 2> /dev/null)
 113         oldrev_type=$(git cat-file -t "$oldrev" 2> /dev/null)
 114         case "$change_type" in
 115         create|update)
 116                 rev="$newrev"
 117                 rev_type="$newrev_type"
 118                 ;;
 119         delete)
 120                 rev="$oldrev"
 121                 rev_type="$oldrev_type"
 122                 ;;
 123         esac
 124
 125         # The revision type tells us what type the commit is, combined with
 126         # the location of the ref we can decide between
 127         #  - working branch
 128         #  - tracking branch
 129         #  - unannoted tag
 130         #  - annotated tag
 131         case "$refname","$rev_type" in
 132                 refs/tags/*,commit)
 133                         # un-annotated tag
 134                         refname_type="tag"
 135                         short_refname=${refname##refs/tags/}
 136                         ;;
 137                 refs/tags/*,tag)
 138                         # annotated tag
 139                         refname_type="annotated tag"
 140                         short_refname=${refname##refs/tags/}
 141                         # change recipients
 142                         if [ -n "$announcerecipients" ]; then
 143                                 recipients="$announcerecipients"
 144                         fi
 145                         ;;
 146                 refs/heads/*,commit)
 147                         # branch
 148                         refname_type="branch"
 149                         short_refname=${refname##refs/heads/}
 150                         ;;
 151                 refs/remotes/*,commit)
 152                         # tracking branch
 153                         refname_type="tracking branch"
 154                         short_refname=${refname##refs/remotes/}
 155                         echol >&2 "*** Push-update of tracking branch, $refname"
 156                         echol >&2 "***  - no email generated."
 157                         return 1
 158                         ;;
 159                 refs/mob/*,commit|refs/mob/*,tag)
 160                         # personal mob ref
 161                         refname_type="personal mob ref"
 162                         short_refname=${refname##refs/mob/}
 163                         echol >&2 "*** Push-update of personal mob ref, $refname"
 164                         echol >&2 "***  - no email generated."
 165                         return 1
 166                         ;;
 167                 *)
 168                         # Anything else (is there anything else?)
 169                         echol >&2 "*** Unknown type of update to $refname ($rev_type)"
 170                         echol >&2 "***  - no email generated"
 171                         return 1
 172                         ;;
 173         esac
 174
 175         # Check if we've got anyone to send to
 176         if [ -z "$recipients" ]; then
 177                 case "$refname_type" in
 178                         "annotated tag")
 179                                 config_name="hooks.announcelist"
 180                                 ;;
 181                         *)
 182                                 config_name="hooks.mailinglist"
 183                                 ;;
 184                 esac
 185                 echol >&2 "*** $config_name is not set so no email will be sent"
 186                 echol >&2 "*** for $refname update $oldrev->$newrev"
 187                 return 1
 188         fi
 189
 190         return 0
 191 }
 192
 193 #
 194 # Top level email generation function.  This calls the appropriate
 195 # body-generation routine after outputting the common header.
 196 #
 197 # Note this function doesn't actually generate any email output, that is
 198 # taken care of by the functions it calls:
 199 #  - generate_email_header
 200 #  - generate_create_XXXX_email
 201 #  - generate_update_XXXX_email
 202 #  - generate_delete_XXXX_email
 203 #  - generate_email_footer
 204 #
 205 # Note also that this function cannot 'exit' from the script; when this
 206 # function is running (in hook script mode), the send_mail() function
 207 # is already executing in another process, connected via a pipe, and
 208 # if this function exits without, whatever has been generated to that
 209 # point will be sent as an email... even if nothing has been generated.
 210 #
 211 generate_email()
 212 {
 213         # Email parameters
 214         # The email subject will contain the best description of the ref
 215         # that we can build from the parameters
 216         describe=$(git describe $rev 2>/dev/null)
 217         if [ -z "$describe" ]; then
 218                 describe=$rev
 219         fi
 220
 221         generate_email_header
 222
 223         # Call the correct body generation function
 224         fn_name=general
 225         case "$refname_type" in
 226         "tracking branch"|branch)
 227                 fn_name=branch
 228                 ;;
 229         "annotated tag")
 230                 fn_name=atag
 231                 ;;
 232         esac
 233         generate_${change_type}_${fn_name}_email
 234
 235         generate_email_footer
 236 }
 237
 238 generate_email_header()
 239 {
 240         # --- Email (all stdout will be the email)
 241         # Generate header
 242         if [ -n "$emailsender" ]; then
 243                 echol "From: $emailsender"
 244         fi
 245         cat <<-EOF
 246         To: $recipients
 247         Subject: ${emailprefix}$projectname $refname_type $short_refname ${change_type}d: $describe
 248         MIME-Version: 1.0
 249         Content-Type: text/plain; charset=utf-8
 250         Content-Transfer-Encoding: 8bit
 251         EOF
 252         [ -z "$emailextraheader" ] || echol "$emailextraheader"
 253         cat <<-EOF
 254         X-Git-Refname: $refname
 255         X-Git-Reftype: $refname_type
 256         X-Git-Oldrev: $oldrev
 257         X-Git-Newrev: $newrev
 258         Auto-Submitted: auto-generated
 259
 260         This is an automated email from the git hooks/post-receive script. It was
 261         generated because a ref change was pushed to the repository containing
 262         the project $projectname.
 263
 264         The $refname_type, $short_refname has been ${change_type}d
 265         EOF
 266 }
 267
 268 generate_email_footer()
 269 {
 270         SPACE=" "
 271         cat <<-EOF
 272
 273
 274         $cfg_name automatic notification. Contact project admin $projectowner
 275         if you want to unsubscribe, or site admin $cfg_admin if you receive
 276         no reply.
 277         --${SPACE}
 278         $projectboth
 279         EOF
 280 }
 281
 282 # --------------- Branches
 283
 284 #
 285 # Called for the creation of a branch
 286 #
 287 generate_create_branch_email()
 288 {
 289         # This is a new branch and so oldrev is not valid
 290         echol "        at  $newrev ($newrev_type)"
 291         echol ""
 292
 293         echol $LOGBEGIN
 294         show_new_revisions
 295         echol $LOGEND
 296 }
 297
 298 #
 299 # Called for the change of a pre-existing branch
 300 #
 301 generate_update_branch_email()
 302 {
 303         # Consider this:
 304         #   1 --- 2 --- O --- X --- 3 --- 4 --- N
 305         #
 306         # O is $oldrev for $refname
 307         # N is $newrev for $refname
 308         # X is a revision pointed to by some other ref, for which we may
 309         #   assume that an email has already been generated.
 310         # In this case we want to issue an email containing only revisions
 311         # 3, 4, and N.  Given (almost) by
 312         #
 313         #  git rev-list N ^O --not --all
 314         #
 315         # The reason for the "almost", is that the "--not --all" will take
 316         # precedence over the "N", and effectively will translate to
 317         #
 318         #  git rev-list N ^O ^X ^N
 319         #
 320         # So, we need to build up the list more carefully.  git rev-parse
 321         # will generate a list of revs that may be fed into git rev-list.
 322         # We can get it to make the "--not --all" part and then filter out
 323         # the "^N" with:
 324         #
 325         #  git rev-parse --not --all | grep -v N
 326         #
 327         # Then, using the --stdin switch to git rev-list we have effectively
 328         # manufactured
 329         #
 330         #  git rev-list N ^O ^X
 331         #
 332         # This leaves a problem when someone else updates the repository
 333         # while this script is running.  Their new value of the ref we're
 334         # working on would be included in the "--not --all" output; and as
 335         # our $newrev would be an ancestor of that commit, it would exclude
 336         # all of our commits.  What we really want is to exclude the current
 337         # value of $refname from the --not list, rather than N itself.  So:
 338         #
 339         #  git rev-parse --not --all | grep -v $(git rev-parse $refname)
 340         #
 341         # Get's us to something pretty safe (apart from the small time
 342         # between refname being read, and git rev-parse running - for that,
 343         # I give up)
 344         #
 345         #
 346         # Next problem, consider this:
 347         #   * --- B --- * --- O ($oldrev)
 348         #          \
 349         #           * --- X --- * --- N ($newrev)
 350         #
 351         # That is to say, there is no guarantee that oldrev is a strict
 352         # subset of newrev (it would have required a --force, but that's
 353         # allowed).  So, we can't simply say rev-list $oldrev..$newrev.
 354         # Instead we find the common base of the two revs and list from
 355         # there.
 356         #
 357         # As above, we need to take into account the presence of X; if
 358         # another branch is already in the repository and points at some of
 359         # the revisions that we are about to output - we don't want them.
 360         # The solution is as before: git rev-parse output filtered.
 361         #
 362         # Finally, tags: 1 --- 2 --- O --- T --- 3 --- 4 --- N
 363         #
 364         # Tags pushed into the repository generate nice shortlog emails that
 365         # summarise the commits between them and the previous tag.  However,
 366         # those emails don't include the full commit messages that we output
 367         # for a branch update.  Therefore we still want to output revisions
 368         # that have been output on a tag email.
 369         #
 370         # Luckily, git rev-parse includes just the tool.  Instead of using
 371         # "--all" we use "--branches"; this has the added benefit that
 372         # "remotes/" will be ignored as well.
 373
 374         # List all of the revisions that were removed by this update, in a
 375         # fast-forward update, this list will be empty, because rev-list O
 376         # ^N is empty.  For a non-fast-forward, O ^N is the list of removed
 377         # revisions
 378         fast_forward=""
 379         rev=""
 380         for rev in $(git rev-list $newrev..$oldrev)
 381         do
 382                 revtype=$(git cat-file -t "$rev")
 383                 echol "  discards  $rev ($revtype)"
 384         done
 385         if [ -z "$rev" ]; then
 386                 fast_forward=1
 387         fi
 388
 389         # List all the revisions from baserev to newrev in a kind of
 390         # "table-of-contents"; note this list can include revisions that
 391         # have already had notification emails and is present to show the
 392         # full detail of the change from rolling back the old revision to
 393         # the base revision and then forward to the new revision
 394         for rev in $(git rev-list $oldrev..$newrev)
 395         do
 396                 revtype=$(git cat-file -t "$rev")
 397                 echol "       via  $rev ($revtype)"
 398         done
 399
 400         if [ "$fast_forward" ]; then
 401                 echol "      from  $oldrev ($oldrev_type)"
 402         else
 403                 #  1. Existing revisions were removed.  In this case newrev
 404                 #     is a subset of oldrev - this is the reverse of a
 405                 #     fast-forward, a rewind
 406                 #  2. New revisions were added on top of an old revision,
 407                 #     this is a rewind and addition.
 408
 409                 # (1) certainly happened, (2) possibly.  When (2) hasn't
 410                 # happened, we set a flag to indicate that no log printout
 411                 # is required.
 412
 413                 echol ""
 414
 415                 # Find the common ancestor of the old and new revisions and
 416                 # compare it with newrev
 417                 baserev=$(git merge-base $oldrev $newrev)
 418                 rewind_only=""
 419                 if [ "$baserev" = "$newrev" ]; then
 420                         echol "This update discarded existing revisions and left the branch pointing at"
 421                         echol "a previous point in the repository history."
 422                         echol ""
 423                         echol " * -- * -- N ($newrev)"
 424                         echol "            \\"
 425                         echol "             O -- O -- O ($oldrev)"
 426                         echol ""
 427                         echol "The removed revisions are not necessarily gone - if another reference"
 428                         echol "still refers to them they will stay in the repository."
 429                         rewind_only=1
 430                 else
 431                         echol "This update added new revisions after undoing existing revisions.  That is"
 432                         echol "to say, the old revision is not a strict subset of the new revision.  This"
 433                         echol "situation occurs when you --force push a change and generate a repository"
 434                         echol "containing something like this:"
 435                         echol ""
 436                         echol " * -- * -- B -- O -- O -- O ($oldrev)"
 437                         echol "            \\"
 438                         echol "             N -- N -- N ($newrev)"
 439                         echol ""
 440                         echol "When this happens we assume that you've already had alert emails for all"
 441                         echol "of the O revisions, and so we here report only the revisions in the N"
 442                         echol "branch from the common base, B."
 443                 fi
 444         fi
 445
 446         echol ""
 447         if [ -z "$rewind_only" ]; then
 448                 echol "Those revisions listed above that are new to this repository have"
 449                 echol "not appeared on any other notification email; so we list those"
 450                 echol "revisions in full, below."
 451
 452                 echol ""
 453                 echol $LOGBEGIN
 454                 show_new_revisions
 455
 456                 # XXX: Need a way of detecting whether git rev-list actually
 457                 # outputted anything, so that we can issue a "no new
 458                 # revisions added by this update" message
 459
 460                 echol $LOGEND
 461         else
 462                 echol "No new revisions were added by this update."
 463         fi
 464
 465         # The diffstat is shown from the old revision to the new revision.
 466         # This is to show the truth of what happened in this change.
 467         # There's no point showing the stat from the base to the new
 468         # revision because the base is effectively a random revision at this
 469         # point - the user will be interested in what this revision changed
 470         # - including the undoing of previous revisions in the case of
 471         # non-fast-forward updates.
 472         echol ""
 473         echol "Summary of changes:"
 474         git diff-tree --no-color --stat --summary --find-copies-harder $oldrev..$newrev
 475 }
 476
 477 #
 478 # Called for the deletion of a branch
 479 #
 480 generate_delete_branch_email()
 481 {
 482         echol "       was  $oldrev"
 483         echol ""
 484         echol $LOGBEGIN
 485         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 486         echol $LOGEND
 487 }
 488
 489 # --------------- Annotated tags
 490
 491 #
 492 # Called for the creation of an annotated tag
 493 #
 494 generate_create_atag_email()
 495 {
 496         echol "        at  $newrev ($newrev_type)"
 497
 498         generate_atag_email
 499 }
 500
 501 #
 502 # Called for the update of an annotated tag (this is probably a rare event
 503 # and may not even be allowed)
 504 #
 505 generate_update_atag_email()
 506 {
 507         echol "        to  $newrev ($newrev_type)"
 508         echol "      from  $oldrev (which is now obsolete)"
 509
 510         generate_atag_email
 511 }
 512
 513 #
 514 # Called when an annotated tag is created or changed
 515 #
 516 generate_atag_email()
 517 {
 518         # Use git for-each-ref to pull out the individual fields from the
 519         # tag
 520         eval $(git for-each-ref --shell --format='
 521         tagobject=%(*objectname)
 522         tagtype=%(*objecttype)
 523         tagger=%(taggername)
 524         tagged=%(taggerdate)' $refname
 525         )
 526
 527         echol "   tagging  $tagobject ($tagtype)"
 528         case "$tagtype" in
 529         commit)
 530
 531                 # If the tagged object is a commit, then we assume this is a
 532                 # release, and so we calculate which tag this tag is
 533                 # replacing
 534                 prevtag=$(git describe --abbrev=0 $newrev^ 2>/dev/null)
 535
 536                 if [ -n "$prevtag" ]; then
 537                         echol "  replaces  $prevtag"
 538                 fi
 539                 ;;
 540         *)
 541                 echol "    length  $(git cat-file -s $tagobject) bytes"
 542                 ;;
 543         esac
 544         echol " tagged by  $tagger"
 545         echol "        on  $tagged"
 546
 547         echol ""
 548         echol $LOGBEGIN
 549
 550         # Show the content of the tag message; this might contain a change
 551         # log or release notes so is worth displaying.
 552         git cat-file tag $newrev | sed -e '1,/^$/d'
 553
 554         echol ""
 555         case "$tagtype" in
 556         commit)
 557                 # Only commit tags make sense to have rev-list operations
 558                 # performed on them
 559                 if [ -n "$prevtag" ]; then
 560                         # Show changes since the previous release
 561                         git shortlog "$prevtag..$newrev"
 562                 else
 563                         # No previous tag, show all the changes since time
 564                         # began
 565                         git shortlog $newrev
 566                 fi
 567                 ;;
 568         *)
 569                 # XXX: Is there anything useful we can do for non-commit
 570                 # objects?
 571                 ;;
 572         esac
 573
 574         echol $LOGEND
 575 }
 576
 577 #
 578 # Called for the deletion of an annotated tag
 579 #
 580 generate_delete_atag_email()
 581 {
 582         echol "       was  $oldrev"
 583         echol ""
 584         echol $LOGBEGIN
 585         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 586         echol $LOGEND
 587 }
 588
 589 # --------------- General references
 590
 591 #
 592 # Called when any other type of reference is created (most likely a
 593 # non-annotated tag)
 594 #
 595 generate_create_general_email()
 596 {
 597         echol "        at  $newrev ($newrev_type)"
 598
 599         generate_general_email
 600 }
 601
 602 #
 603 # Called when any other type of reference is updated (most likely a
 604 # non-annotated tag)
 605 #
 606 generate_update_general_email()
 607 {
 608         echol "        to  $newrev ($newrev_type)"
 609         echol "      from  $oldrev"
 610
 611         generate_general_email
 612 }
 613
 614 #
 615 # Called for creation or update of any other type of reference
 616 #
 617 generate_general_email()
 618 {
 619         # Unannotated tags are more about marking a point than releasing a
 620         # version; therefore we don't do the shortlog summary that we do for
 621         # annotated tags above - we simply show that the point has been
 622         # marked, and print the log message for the marked point for
 623         # reference purposes
 624         #
 625         # Note this section also catches any other reference type (although
 626         # there aren't any) and deals with them in the same way.
 627
 628         echol ""
 629         if [ "$newrev_type" = "commit" ]; then
 630                 echol $LOGBEGIN
 631                 git diff-tree --no-color --root -s --always --encoding=UTF-8 --pretty=medium $newrev
 632                 echol $LOGEND
 633         else
 634                 # What can we do here?  The tag marks an object that is not
 635                 # a commit, so there is no log for us to display.  It's
 636                 # probably not wise to output git cat-file as it could be a
 637                 # binary blob.  We'll just say how big it is
 638                 echol "$newrev is a $newrev_type, and is $(git cat-file -s $newrev) bytes long."
 639         fi
 640 }
 641
 642 #
 643 # Called for the deletion of any other type of reference
 644 #
 645 generate_delete_general_email()
 646 {
 647         echol "       was  $oldrev"
 648         echol ""
 649         echol $LOGBEGIN
 650         git diff-tree --no-color -s --always --encoding=UTF-8 --pretty=oneline $oldrev
 651         echol $LOGEND
 652 }
 653
 654
 655 # --------------- Miscellaneous utilities
 656
 657 #
 658 # Show new revisions as the user would like to see them in the email.
 659 #
 660 show_new_revisions()
 661 {
 662         # This shows all log entries that are not already covered by
 663         # another ref - i.e. commits that are now accessible from this
 664         # ref that were previously not accessible
 665         # (see generate_update_branch_email for the explanation of this
 666         # command)
 667
 668         # Revision range passed to rev-list differs for new vs. updated
 669         # branches.
 670         if [ "$change_type" = create ]
 671         then
 672                 # Show all revisions exclusive to this (new) branch.
 673                 revspec=$newrev
 674         else
 675                 # Branch update; show revisions not part of $oldrev.
 676                 revspec=$oldrev..$newrev
 677         fi
 678
 679         other_branches=$(git for-each-ref --format='%(refname)' refs/heads/ |
 680             grep -F -v $refname)
 681         git rev-parse --not $other_branches |
 682 #       if [ -z "$custom_showrev" ]
 683 #       then
 684 #               git rev-list --pretty --stdin $revspec
 685 #       else
 686                 git rev-list --stdin $revspec |
 687                 while read onerev
 688                 do
 689                         if [ -n "$custom_showrev" ]; then
 690                                 eval $(printf "$custom_showrev" $onerev)
 691                         else
 692                                 echol "$cfg_gitweburl/$projectname/commit/$onerev"
 693                                 echo
 694                                 git diff-tree --no-color -p --always --encoding=UTF-8 --pretty=medium -C $onerev
 695                                 echo
 696                         fi
 697                 done
 698 #       fi
 699 }
 700
 701
 702 size_limit()
 703 {
 704         size=0
 705         while IFS= read -r line; do
 706                 # Include size of RFC 822 trailing CR+LF on each line
 707                 size=$(($size+${#line}+2))
 708                 if [ $size -gt $1 ]; then
 709                         echol "...e-mail trimmed, has been too large."
 710                         break
 711                 fi
 712                 echol "$line"
 713         done
 714 }
 715
 716
 717 send_mail()
 718 {
 719         if [ -n "$cfg_sender" ]; then
 720                 "${cfg_sendmail_bin:-/usr/sbin/sendmail}" -i -t -f "$cfg_sender"
 721         else
 722                 "${cfg_sendmail_bin:-/usr/sbin/sendmail}" -i -t
 723         fi
 724 }
 725
 726 # ---------------------------- main()
 727
 728 # --- Constants
 729 LOGBEGIN="- Log -----------------------------------------------------------------"
 730 LOGEND="-----------------------------------------------------------------------"
 731
 732 # --- Config
 733 . @basedir@/shlib.sh
 734
 735 # Set GIT_DIR either from the working directory, or from the environment
 736 # variable.
 737 GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
 738 if [ -z "$GIT_DIR" ]; then
 739         echol >&2 "fatal: post-receive: GIT_DIR not set"
 740         exit 1
 741 fi
 742
 743 projectdesc=$(sed -ne '1p' "$GIT_DIR/description")
 744 # Check if the description is unchanged from it's default, and shorten it to
 745 # a more manageable length if it is
 746 if expr "$projectdesc" : "Unnamed repository.*$" >/dev/null
 747 then
 748         projectdesc="UNNAMED PROJECT"
 749 fi
 750
 751 projectname="$4"
 752 if [ -n "$projectname" ]; then
 753         projectname="$projectname.git"
 754         projectboth="$projectname (\"$projectdesc\")"
 755         projectowner="$(config_get owner)"
 756 else
 757         projectname="$projectdesc"
 758         projectboth="$projectdesc"
 759 fi
 760
 761 emailsender="$5"
 762 emailextraheader="$6"
 763
 764 recipients=$(git config hooks.mailinglist)
 765 announcerecipients=$(git config hooks.announcelist)
 766 envelopesender=$(git config hooks.envelopesender)
 767 emailprefix=$(git config hooks.emailprefix || echol "[$cfg_name] ")
 768 custom_showrev=$(git config hooks.showrev)
 769
 770 # --- Main loop
 771 # Allow dual mode: run from the command line just like the update hook, or
 772 # if no arguments are given then run as a hook script
 773 if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
 774         # Output to the terminal in command line mode - if someone wanted to
 775         # resend an email; they could redirect the output to sendmail
 776         # themselves
 777         if prep_for_email $2 $3 $1; then
 778                 PAGER= generate_email | size_limit $((256*1024)) | send_mail
 779         fi
 780 else
 781         while read oldrev newrev refname
 782         do
 783                 prep_for_email $oldrev $newrev $refname || continue
 784                 PAGER= generate_email | size_limit $((256*1024)) | send_mail
 785         done
 786 fi
 787
 788 exit 0