templates/hooks--update

   1 #!/bin/sh
   2 #
   3 # An example hook script to mail out commit update information.
   4 # It can also blocks tags that aren't annotated.
   5 # Called by git-receive-pack with arguments: refname sha1-old sha1-new
   6 #
   7 # To enable this hook, make this file executable by "chmod +x update".
   8 #
   9 # Config
  10 # ------
  11 # hooks.mailinglist
  12 #   This is the list that all pushes will go to; leave it blank to not send
  13 #   emails frequently.  The log email will list every log entry in full between
  14 #   the old ref value and the new ref value.
  15 # hooks.announcelist
  16 #   This is the list that all pushes of annotated tags will go to.  Leave it
  17 #   blank to just use the mailinglist field.  The announce emails list the
  18 #   short log summary of the changes since the last annotated tag
  19 # hooks.allowunannotated
  20 #   This boolean sets whether unannotated tags will be allowed into the
  21 #   repository.  By default they won't be.
  22 #
  23 # Notes
  24 # -----
  25 # All emails have their subjects prefixed with "[SCM]" to aid filtering.
  26 # All emails include the headers "X-Git-Refname", "X-Git-Oldrev",
  27 # "X-Git-Newrev", and "X-Git-Reftype" to enable fine tuned filtering and info.
  28
  29 # --- Constants
  30 EMAILPREFIX="[SCM] "
  31 LOGBEGIN="- Log -----------------------------------------------------------------"
  32 LOGEND="-----------------------------------------------------------------------"
  33 DATEFORMAT="%F %R %z"
  34
  35 # --- Command line
  36 refname="$1"
  37 oldrev="$2"
  38 newrev="$3"
  39
  40 # --- Safety check
  41 if [ -z "$GIT_DIR" ]; then
  42         echo "Don't run this script from the command line." >&2
  43         echo " (if you want, you could supply GIT_DIR then run" >&2
  44         echo "  $0 <ref> <oldrev> <newrev>)" >&2
  45         exit 1
  46 fi
  47
  48 if [ -z "$refname" -o -z "$oldrev" -o -z "$newrev" ]; then
  49         echo "Usage: $0 <ref> <oldrev> <newrev>" >&2
  50         exit 1
  51 fi
  52
  53 # --- Config
  54 projectdesc=$(cat $GIT_DIR/description)
  55 recipients=$(git-repo-config hooks.mailinglist)
  56 announcerecipients=$(git-repo-config hooks.announcelist)
  57 allowunannotated=$(git-repo-config --bool hooks.allowunannotated)
  58
  59 # --- Check types
  60 newrev_type=$(git-cat-file -t "$newrev")
  61
  62 case "$refname","$newrev_type" in
  63         refs/tags/*,commit)
  64                 # un-annotated tag
  65                 refname_type="tag"
  66                 short_refname=${refname##refs/tags/}
  67                 if [ $allowunannotated != "true" ]; then
  68                         echo "*** The un-annotated tag, $short_refname is not allowed in this repository" >&2
  69                         echo "*** Use 'git tag [ -a | -s ]' for tags you want to propagate." >&2
  70                         exit 1
  71                 fi
  72                 ;;
  73         refs/tags/*,tag)
  74                 # annotated tag
  75                 refname_type="annotated tag"
  76                 short_refname=${refname##refs/tags/}
  77                 # change recipients
  78                 if [ -n "$announcerecipients" ]; then
  79                         recipients="$announcerecipients"
  80                 fi
  81                 ;;
  82         refs/heads/*,commit)
  83                 # branch
  84                 refname_type="branch"
  85                 short_refname=${refname##refs/heads/}
  86                 ;;
  87         refs/remotes/*,commit)
  88                 # tracking branch
  89                 refname_type="tracking branch"
  90                 short_refname=${refname##refs/remotes/}
  91                 # Should this even be allowed?
  92                 echo "*** Push-update of tracking branch, $refname.  No email generated." >&2
  93                 exit 0
  94                 ;;
  95         *)
  96                 # Anything else (is there anything else?)
  97                 echo "*** Update hook: unknown type of update, \"$newrev_type\", to ref $refname" >&2
  98                 exit 1
  99                 ;;
 100 esac
 101
 102 # Check if we've got anyone to send to
 103 if [ -z "$recipients" ]; then
 104         # If the email isn't sent, then at least give the user some idea of what command
 105         # would generate the email at a later date
 106         echo "*** No recipients found - no email will be sent, but the push will continue" >&2
 107         echo "*** for $0 $1 $2 $3" >&2
 108         exit 0
 109 fi
 110
 111 # --- Email parameters
 112 committer=$(git show --pretty=full -s $newrev | grep "^Commit: " | sed -e "s/^Commit: //")
 113 describe=$(git describe $newrev 2>/dev/null)
 114 if [ -z "$describe" ]; then
 115         describe=$newrev
 116 fi
 117
 118 # --- Email (all stdout will be the email)
 119 (
 120 # Generate header
 121 cat <<-EOF
 122 From: $committer
 123 To: $recipients
 124 Subject: ${EMAILPREFIX}$projectdesc $refname_type, $short_refname now at $describe
 125 X-Git-Refname: $refname
 126 X-Git-Reftype: $refname_type
 127 X-Git-Oldrev: $oldrev
 128 X-Git-Newrev: $newrev
 129
 130 Hello,
 131
 132 This is an automated email from the git hooks/update script, it was
 133 generated because a ref change was pushed to the repository.
 134
 135 Updating $refname_type, $short_refname,
 136 EOF
 137
 138 case "$refname_type" in
 139         "tracking branch"|branch)
 140                 if expr "$oldrev" : '0*$' >/dev/null
 141                 then
 142                         # If the old reference is "0000..0000" then this is a new branch
 143                         # and so oldrev is not valid
 144                         echo "  as a new  $refname_type"
 145                     echo "        to  $newrev ($newrev_type)"
 146                         echo ""
 147                         echo $LOGBEGIN
 148                         # This shows all log entries that are not already covered by
 149                         # another ref - i.e. commits that are now accessible from this
 150                         # ref that were previously not accessible
 151                         git-rev-parse --not --all | git-rev-list --stdin --pretty $newref
 152                         echo $LOGEND
 153                 else
 154                         # oldrev is valid
 155                         oldrev_type=$(git-cat-file -t "$oldrev")
 156
 157                         # Now the problem is for cases like this:
 158                         #   * --- * --- * --- * (oldrev)
 159                         #          \
 160                         #           * --- * --- * (newrev)
 161                         # i.e. there is no guarantee that newrev is a strict subset
 162                         # of oldrev - (would have required a force, but that's allowed).
 163                         # So, we can't simply say rev-list $oldrev..$newrev.  Instead
 164                         # we find the common base of the two revs and list from there
 165                         baserev=$(git-merge-base $oldrev $newrev)
 166
 167                         # Commit with a parent
 168                         for rev in $(git-rev-list $newrev ^$baserev)
 169                         do
 170                                 revtype=$(git-cat-file -t "$rev")
 171                                 echo "       via  $rev ($revtype)"
 172                         done
 173                         if [ "$baserev" = "$oldrev" ]; then
 174                                 echo "      from  $oldrev ($oldrev_type)"
 175                         else
 176                                 echo "  based on  $baserev"
 177                                 echo "      from  $oldrev ($oldrev_type)"
 178                                 echo ""
 179                                 echo "This ref update crossed a branch point; i.e. the old rev is not a strict subset"
 180                                 echo "of the new rev.  This occurs, when you --force push a change in a situation"
 181                                 echo "like this:"
 182                                 echo ""
 183                                 echo " * -- * -- B -- O -- O -- O ($oldrev)"
 184                                 echo "            \\"
 185                                 echo "             N -- N -- N ($newrev)"
 186                                 echo ""
 187                                 echo "Therefore, we assume that you've already had alert emails for all of the O"
 188                                 echo "revisions, and now give you all the revisions in the N branch from the common"
 189                                 echo "base, B ($baserev), up to the new revision."
 190                         fi
 191                         echo ""
 192                         echo $LOGBEGIN
 193                         git-rev-list --pretty $newrev ^$baserev
 194                         echo $LOGEND
 195                         echo ""
 196                         echo "Diffstat:"
 197                         git-diff-tree --no-color --stat -M -C --find-copies-harder $newrev ^$baserev
 198                 fi
 199                 ;;
 200         "annotated tag")
 201                 # Should we allow changes to annotated tags?
 202                 if expr "$oldrev" : '0*$' >/dev/null
 203                 then
 204                         # If the old reference is "0000..0000" then this is a new atag
 205                         # and so oldrev is not valid
 206                         echo "        to  $newrev ($newrev_type)"
 207                 else
 208                         echo "        to  $newrev ($newrev_type)"
 209                         echo "      from  $oldrev"
 210                 fi
 211
 212                 # If this tag succeeds another, then show which tag it replaces
 213                 prevtag=$(git describe $newrev^ 2>/dev/null | sed 's/-g.*//')
 214                 if [ -n "$prevtag" ]; then
 215                         echo "  replaces  $prevtag"
 216                 fi
 217
 218                 # Read the tag details
 219                 eval $(git cat-file tag $newrev | \
 220                         sed -n '4s/tagger \([^>]*>\)[^0-9]*\([0-9]*\).*/tagger="\1" ts="\2"/p')
 221                 tagged=$(date --date="1970-01-01 00:00:00 +0000 $ts seconds" +"$DATEFORMAT")
 222
 223                 echo " tagged by  $tagger"
 224                 echo "        on  $tagged"
 225
 226                 echo ""
 227                 echo $LOGBEGIN
 228                 echo ""
 229
 230                 if [ -n "$prevtag" ]; then
 231                         git rev-list --pretty=short "$prevtag..$newrev" | git shortlog
 232                 else
 233                         git rev-list --pretty=short $newrev | git shortlog
 234                 fi
 235
 236                 echo $LOGEND
 237                 echo ""
 238                 ;;
 239         *)
 240                 # By default, unannotated tags aren't allowed in; if
 241                 # they are though, it's debatable whether we would even want an
 242                 # email to be generated; however, I don't want to add another config
 243                 # option just for that.
 244                 #
 245                 # Unannotated tags are more about marking a point than releasing
 246                 # a version; therefore we don't do the shortlog summary that we
 247                 # do for annotated tags above - we simply show that the point has
 248                 # been marked, and print the log message for the marked point for
 249                 # reference purposes
 250                 #
 251                 # Note this section also catches any other reference type (although
 252                 # there aren't any) and deals with them in the same way.
 253                 if expr "$oldrev" : '0*$' >/dev/null
 254                 then
 255                         # If the old reference is "0000..0000" then this is a new tag
 256                         # and so oldrev is not valid
 257                         echo "  as a new  $refname_type"
 258                         echo "        to  $newrev ($newrev_type)"
 259                 else
 260                         echo "        to  $newrev ($newrev_type)"
 261                         echo "      from  $oldrev"
 262                 fi
 263                 echo ""
 264                 echo $LOGBEGIN
 265                 git-show --no-color --root -s $newrev
 266                 echo $LOGEND
 267                 echo ""
 268                 ;;
 269 esac
 270
 271 # Footer
 272 cat <<-EOF
 273
 274 hooks/update
 275 ---
 276 Git Source Code Management System
 277 $0 $1 \\
 278   $2 \\
 279   $3
 280 EOF
 281 #) | cat >&2
 282 ) | /usr/sbin/sendmail -t
 283
 284 # --- Finished
 285 exit 0