e75c55844f
* maint: Yet more 1.5.3.5 fixes mentioned in release notes cvsserver: Use exit 1 instead of die when req_Root fails. git-blame shouldn't crash if run in an unmerged tree git-config: print error message if the config file cannot be read fixing output of non-fast-forward output of post-receive-email
631 lines
18 KiB
Bash
631 lines
18 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 2007 Andy Parkins
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#
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# An example hook script to mail out commit update information. This hook sends emails
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# listing new revisions to the repository introduced by the change being reported. The
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# rule is that (for branch updates) each commit will appear on one email and one email
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# only.
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#
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# This hook is stored in the contrib/hooks directory. Your distribution will have put
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# this somewhere standard. You should make this script executable then link to it in
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# the repository you would like to use it in. For example, on debian the hook is stored
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# in /usr/share/doc/git-core/contrib/hooks/post-receive-email:
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#
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# chmod a+x post-receive-email
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# cd /path/to/your/repository.git
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# ln -sf /usr/share/doc/git-core/contrib/hooks/post-receive-email hooks/post-receive
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#
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# This hook script assumes it is enabled on the central repository of a project, with
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# all users pushing only to it and not between each other. It will still work if you
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# don't operate in that style, but it would become possible for the email to be from
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# someone other than the person doing the push.
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#
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# Config
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# ------
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# hooks.mailinglist
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# This is the list that all pushes will go to; leave it blank to not send
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# emails for every ref update.
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# hooks.announcelist
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# This is the list that all pushes of annotated tags will go to. Leave it
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# blank to default to the mailinglist field. The announce emails lists the
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# short log summary of the changes since the last annotated tag.
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# hook.envelopesender
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# If set then the -f option is passed to sendmail to allow the envelope sender
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# address to be set
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#
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# Notes
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# -----
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# All emails have their subjects prefixed with "[SCM]" to aid filtering.
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# All emails include the headers "X-Git-Refname", "X-Git-Oldrev",
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# "X-Git-Newrev", and "X-Git-Reftype" to enable fine tuned filtering and
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# give information for debugging.
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#
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# ---------------------------- Functions
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#
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# Top level email generation function. This decides what type of update
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# this is and calls the appropriate body-generation routine after outputting
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# the common header
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#
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# Note this function doesn't actually generate any email output, that is taken
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# care of by the functions it calls:
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# - generate_email_header
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# - generate_create_XXXX_email
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# - generate_update_XXXX_email
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# - generate_delete_XXXX_email
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# - generate_email_footer
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#
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generate_email()
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{
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# --- Arguments
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oldrev=$(git rev-parse $1)
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newrev=$(git rev-parse $2)
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refname="$3"
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# --- Interpret
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# 0000->1234 (create)
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# 1234->2345 (update)
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# 2345->0000 (delete)
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if expr "$oldrev" : '0*$' >/dev/null
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then
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change_type="create"
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else
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if expr "$newrev" : '0*$' >/dev/null
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then
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change_type="delete"
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else
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change_type="update"
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fi
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fi
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# --- Get the revision types
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newrev_type=$(git cat-file -t $newrev 2> /dev/null)
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oldrev_type=$(git cat-file -t "$oldrev" 2> /dev/null)
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case "$change_type" in
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create|update)
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rev="$newrev"
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rev_type="$newrev_type"
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;;
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delete)
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rev="$oldrev"
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rev_type="$oldrev_type"
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;;
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esac
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# The revision type tells us what type the commit is, combined with
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# the location of the ref we can decide between
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# - working branch
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# - tracking branch
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# - unannoted tag
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# - annotated tag
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case "$refname","$rev_type" in
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refs/tags/*,commit)
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# un-annotated tag
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refname_type="tag"
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short_refname=${refname##refs/tags/}
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;;
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refs/tags/*,tag)
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# annotated tag
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refname_type="annotated tag"
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short_refname=${refname##refs/tags/}
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# change recipients
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if [ -n "$announcerecipients" ]; then
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recipients="$announcerecipients"
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fi
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;;
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refs/heads/*,commit)
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# branch
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refname_type="branch"
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short_refname=${refname##refs/heads/}
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;;
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refs/remotes/*,commit)
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# tracking branch
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refname_type="tracking branch"
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short_refname=${refname##refs/remotes/}
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echo >&2 "*** Push-update of tracking branch, $refname"
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echo >&2 "*** - no email generated."
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exit 0
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;;
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*)
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# Anything else (is there anything else?)
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echo >&2 "*** Unknown type of update to $refname ($rev_type)"
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echo >&2 "*** - no email generated"
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exit 1
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;;
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esac
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# Check if we've got anyone to send to
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if [ -z "$recipients" ]; then
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case "$refname_type" in
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"annotated tag")
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config_name="hooks.announcelist"
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;;
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*)
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config_name="hooks.mailinglist"
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;;
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esac
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echo >&2 "*** $config_name is not set so no email will be sent"
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echo >&2 "*** for $refname update $oldrev->$newrev"
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exit 0
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fi
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# Email parameters
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# The committer will be obtained from the latest existing rev; so
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# for a deletion it will be the oldrev, for the others, then newrev
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committer=$(git show --pretty=full -s $rev | sed -ne "s/^Commit: //p" |
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sed -ne 's/\(.*\) </"\1" </p')
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# The email subject will contain the best description of the ref
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# that we can build from the parameters
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describe=$(git describe $rev 2>/dev/null)
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if [ -z "$describe" ]; then
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describe=$rev
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fi
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generate_email_header
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# Call the correct body generation function
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fn_name=general
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case "$refname_type" in
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"tracking branch"|branch)
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fn_name=branch
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;;
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"annotated tag")
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fn_name=atag
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;;
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esac
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generate_${change_type}_${fn_name}_email
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generate_email_footer
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}
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generate_email_header()
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{
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# --- Email (all stdout will be the email)
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# Generate header
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cat <<-EOF
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To: $recipients
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Subject: ${EMAILPREFIX}$projectdesc $refname_type, $short_refname, ${change_type}d. $describe
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X-Git-Refname: $refname
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X-Git-Reftype: $refname_type
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X-Git-Oldrev: $oldrev
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X-Git-Newrev: $newrev
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This is an automated email from the git hooks/post-receive script. It was
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generated because a ref change was pushed to the repository containing
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the project "$projectdesc".
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The $refname_type, $short_refname has been ${change_type}d
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EOF
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}
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generate_email_footer()
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{
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cat <<-EOF
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hooks/post-receive
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--
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$projectdesc
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EOF
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}
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# --------------- Branches
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#
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# Called for the creation of a branch
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#
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generate_create_branch_email()
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{
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# This is a new branch and so oldrev is not valid
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echo " at $newrev ($newrev_type)"
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echo ""
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echo $LOGBEGIN
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# This shows all log entries that are not already covered by
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# another ref - i.e. commits that are now accessible from this
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# ref that were previously not accessible (see generate_update_branch_email
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# for the explanation of this command)
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git rev-parse --not --branches | grep -v $(git rev-parse $refname) |
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git rev-list --pretty --stdin $newrev
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echo $LOGEND
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}
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#
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# Called for the change of a pre-existing branch
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#
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generate_update_branch_email()
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{
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# Consider this:
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# 1 --- 2 --- O --- X --- 3 --- 4 --- N
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#
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# O is $oldrev for $refname
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# N is $newrev for $refname
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# X is a revision pointed to by some other ref, for which we may
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# assume that an email has already been generated.
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# In this case we want to issue an email containing only revisions
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# 3, 4, and N. Given (almost) by
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#
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# git-rev-list N ^O --not --all
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#
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# The reason for the "almost", is that the "--not --all" will take
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# precedence over the "N", and effectively will translate to
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#
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# git-rev-list N ^O ^X ^N
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#
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# So, we need to build up the list more carefully. git-rev-parse will
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# generate a list of revs that may be fed into git-rev-list. We can get
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# it to make the "--not --all" part and then filter out the "^N" with:
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#
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# git-rev-parse --not --all | grep -v N
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#
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# Then, using the --stdin switch to git-rev-list we have effectively
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# manufactured
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#
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# git-rev-list N ^O ^X
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#
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# This leaves a problem when someone else updates the repository
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# while this script is running. Their new value of the ref we're working
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# on would be included in the "--not --all" output; and as our $newrev
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# would be an ancestor of that commit, it would exclude all of our
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# commits. What we really want is to exclude the current value of
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# $refname from the --not list, rather than N itself. So:
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#
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# git-rev-parse --not --all | grep -v $(git-rev-parse $refname)
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#
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# Get's us to something pretty safe (apart from the small time between
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# refname being read, and git-rev-parse running - for that, I give up)
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#
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#
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# Next problem, consider this:
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# * --- B --- * --- O ($oldrev)
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# \
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# * --- X --- * --- N ($newrev)
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#
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# That is to say, there is no guarantee that oldrev is a strict subset of
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# newrev (it would have required a --force, but that's allowed). So, we
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# can't simply say rev-list $oldrev..$newrev. Instead we find the common
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# base of the two revs and list from there.
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#
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# As above, we need to take into account the presence of X; if another
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# branch is already in the repository and points at some of the revisions
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# that we are about to output - we don't want them. The solution is as
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# before: git-rev-parse output filtered.
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#
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# Finally, tags:
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# 1 --- 2 --- O --- T --- 3 --- 4 --- N
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#
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# Tags pushed into the repository generate nice shortlog emails that
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# summarise the commits between them and the previous tag. However,
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# those emails don't include the full commit messages that we output
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# for a branch update. Therefore we still want to output revisions
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# that have been output on a tag email.
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#
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# Luckily, git-rev-parse includes just the tool. Instead of using "--all"
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# we use "--branches"; this has the added benefit that "remotes/" will
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# be ignored as well.
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# List all of the revisions that were removed by this update, in a fast forward
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# update, this list will be empty, because rev-list O ^N is empty. For a non
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# fast forward, O ^N is the list of removed revisions
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fast_forward=""
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rev=""
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for rev in $(git rev-list $newrev..$oldrev)
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do
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revtype=$(git cat-file -t "$rev")
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echo " discards $rev ($revtype)"
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done
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if [ -z "$rev" ]; then
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fast_forward=1
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fi
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# List all the revisions from baserev to newrev in a kind of
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# "table-of-contents"; note this list can include revisions that have
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# already had notification emails and is present to show the full detail
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# of the change from rolling back the old revision to the base revision and
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# then forward to the new revision
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for rev in $(git rev-list $oldrev..$newrev)
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do
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revtype=$(git cat-file -t "$rev")
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echo " via $rev ($revtype)"
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done
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if [ "$fast_forward" ]; then
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echo " from $oldrev ($oldrev_type)"
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else
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# 1. Existing revisions were removed. In this case newrev is a
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# subset of oldrev - this is the reverse of a fast-forward,
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# a rewind
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# 2. New revisions were added on top of an old revision, this is
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# a rewind and addition.
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# (1) certainly happened, (2) possibly. When (2) hasn't happened,
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# we set a flag to indicate that no log printout is required.
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echo ""
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# Find the common ancestor of the old and new revisions and compare
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# it with newrev
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baserev=$(git merge-base $oldrev $newrev)
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rewind_only=""
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if [ "$baserev" = "$newrev" ]; then
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echo "This update discarded existing revisions and left the branch pointing at"
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echo "a previous point in the repository history."
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echo ""
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echo " * -- * -- N ($newrev)"
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echo " \\"
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echo " O -- O -- O ($oldrev)"
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echo ""
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echo "The removed revisions are not necessarilly gone - if another reference"
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echo "still refers to them they will stay in the repository."
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rewind_only=1
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else
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echo "This update added new revisions after undoing existing revisions. That is"
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echo "to say, the old revision is not a strict subset of the new revision. This"
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echo "situation occurs when you --force push a change and generate a repository"
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echo "containing something like this:"
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echo ""
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echo " * -- * -- B -- O -- O -- O ($oldrev)"
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echo " \\"
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echo " N -- N -- N ($newrev)"
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echo ""
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echo "When this happens we assume that you've already had alert emails for all"
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echo "of the O revisions, and so we here report only the revisions in the N"
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echo "branch from the common base, B."
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fi
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fi
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echo ""
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if [ -z "$rewind_only" ]; then
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echo "Those revisions listed above that are new to this repository have"
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echo "not appeared on any other notification email; so we list those"
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echo "revisions in full, below."
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echo ""
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echo $LOGBEGIN
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git rev-parse --not --branches | grep -v $(git rev-parse $refname) |
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git rev-list --pretty --stdin $oldrev..$newrev
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# XXX: Need a way of detecting whether git rev-list actually outputted
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# anything, so that we can issue a "no new revisions added by this
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# update" message
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echo $LOGEND
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else
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echo "No new revisions were added by this update."
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fi
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# The diffstat is shown from the old revision to the new revision. This
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# is to show the truth of what happened in this change. There's no point
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# showing the stat from the base to the new revision because the base
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# is effectively a random revision at this point - the user will be
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# interested in what this revision changed - including the undoing of
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# previous revisions in the case of non-fast forward updates.
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echo ""
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echo "Summary of changes:"
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git diff-tree --stat --summary --find-copies-harder $oldrev..$newrev
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}
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#
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# Called for the deletion of a branch
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#
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generate_delete_branch_email()
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{
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echo " was $oldrev"
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echo ""
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echo $LOGEND
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git show -s --pretty=oneline $oldrev
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echo $LOGEND
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}
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# --------------- Annotated tags
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#
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# Called for the creation of an annotated tag
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#
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generate_create_atag_email()
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{
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echo " at $newrev ($newrev_type)"
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generate_atag_email
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}
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#
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# Called for the update of an annotated tag (this is probably a rare event
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# and may not even be allowed)
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#
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generate_update_atag_email()
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{
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echo " to $newrev ($newrev_type)"
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echo " from $oldrev (which is now obsolete)"
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generate_atag_email
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}
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#
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# Called when an annotated tag is created or changed
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#
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generate_atag_email()
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{
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# Use git-for-each-ref to pull out the individual fields from the tag
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eval $(git for-each-ref --shell --format='
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tagobject=%(*objectname)
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tagtype=%(*objecttype)
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tagger=%(taggername)
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tagged=%(taggerdate)' $refname
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)
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echo " tagging $tagobject ($tagtype)"
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case "$tagtype" in
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commit)
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# If the tagged object is a commit, then we assume this is a
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# release, and so we calculate which tag this tag is replacing
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prevtag=$(git describe --abbrev=0 $newrev^ 2>/dev/null)
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if [ -n "$prevtag" ]; then
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echo " replaces $prevtag"
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fi
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;;
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*)
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echo " length $(git cat-file -s $tagobject) bytes"
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;;
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esac
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echo " tagged by $tagger"
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echo " on $tagged"
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echo ""
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echo $LOGBEGIN
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# Show the content of the tag message; this might contain a change log
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# or release notes so is worth displaying.
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git cat-file tag $newrev | sed -e '1,/^$/d'
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echo ""
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case "$tagtype" in
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commit)
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# Only commit tags make sense to have rev-list operations performed
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# on them
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if [ -n "$prevtag" ]; then
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# Show changes since the previous release
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git rev-list --pretty=short "$prevtag..$newrev" | git shortlog
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else
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# No previous tag, show all the changes since time began
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git rev-list --pretty=short $newrev | git shortlog
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fi
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;;
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*)
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# XXX: Is there anything useful we can do for non-commit objects?
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;;
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esac
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echo $LOGEND
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}
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#
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# Called for the deletion of an annotated tag
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#
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generate_delete_atag_email()
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{
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echo " was $oldrev"
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echo ""
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echo $LOGEND
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git show -s --pretty=oneline $oldrev
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echo $LOGEND
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}
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# --------------- General references
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#
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# Called when any other type of reference is created (most likely a
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# non-annotated tag)
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#
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generate_create_general_email()
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{
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echo " at $newrev ($newrev_type)"
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generate_general_email
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|
}
|
|
|
|
#
|
|
# Called when any other type of reference is updated (most likely a
|
|
# non-annotated tag)
|
|
#
|
|
generate_update_general_email()
|
|
{
|
|
echo " to $newrev ($newrev_type)"
|
|
echo " from $oldrev"
|
|
|
|
generate_general_email
|
|
}
|
|
|
|
#
|
|
# Called for creation or update of any other type of reference
|
|
#
|
|
generate_general_email()
|
|
{
|
|
# Unannotated tags are more about marking a point than releasing a version;
|
|
# therefore we don't do the shortlog summary that we do for annotated tags
|
|
# above - we simply show that the point has been marked, and print the log
|
|
# message for the marked point for reference purposes
|
|
#
|
|
# Note this section also catches any other reference type (although there
|
|
# aren't any) and deals with them in the same way.
|
|
|
|
echo ""
|
|
if [ "$newrev_type" = "commit" ]; then
|
|
echo $LOGBEGIN
|
|
git show --no-color --root -s $newrev
|
|
echo $LOGEND
|
|
else
|
|
# What can we do here? The tag marks an object that is not a commit,
|
|
# so there is no log for us to display. It's probably not wise to
|
|
# output git-cat-file as it could be a binary blob. We'll just say how
|
|
# big it is
|
|
echo "$newrev is a $newrev_type, and is $(git cat-file -s $newrev) bytes long."
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Called for the deletion of any other type of reference
|
|
#
|
|
generate_delete_general_email()
|
|
{
|
|
echo " was $oldrev"
|
|
echo ""
|
|
echo $LOGEND
|
|
git show -s --pretty=oneline $oldrev
|
|
echo $LOGEND
|
|
}
|
|
|
|
send_mail()
|
|
{
|
|
if [ -n "$envelopesender" ]; then
|
|
/usr/sbin/sendmail -t -f "$envelopesender"
|
|
else
|
|
/usr/sbin/sendmail -t
|
|
fi
|
|
}
|
|
|
|
# ---------------------------- main()
|
|
|
|
# --- Constants
|
|
EMAILPREFIX="[SCM] "
|
|
LOGBEGIN="- Log -----------------------------------------------------------------"
|
|
LOGEND="-----------------------------------------------------------------------"
|
|
|
|
# --- Config
|
|
# Set GIT_DIR either from the working directory, or from the environment
|
|
# variable.
|
|
GIT_DIR=$(git rev-parse --git-dir 2>/dev/null)
|
|
if [ -z "$GIT_DIR" ]; then
|
|
echo >&2 "fatal: post-receive: GIT_DIR not set"
|
|
exit 1
|
|
fi
|
|
|
|
projectdesc=$(sed -ne '1p' "$GIT_DIR/description")
|
|
# Check if the description is unchanged from it's default, and shorten it to a
|
|
# more manageable length if it is
|
|
if expr "$projectdesc" : "Unnamed repository.*$" >/dev/null
|
|
then
|
|
projectdesc="UNNAMED PROJECT"
|
|
fi
|
|
|
|
recipients=$(git repo-config hooks.mailinglist)
|
|
announcerecipients=$(git repo-config hooks.announcelist)
|
|
envelopesender=$(git-repo-config hooks.envelopesender)
|
|
|
|
# --- Main loop
|
|
# Allow dual mode: run from the command line just like the update hook, or if
|
|
# no arguments are given then run as a hook script
|
|
if [ -n "$1" -a -n "$2" -a -n "$3" ]; then
|
|
# Output to the terminal in command line mode - if someone wanted to
|
|
# resend an email; they could redirect the output to sendmail themselves
|
|
PAGER= generate_email $2 $3 $1
|
|
else
|
|
while read oldrev newrev refname
|
|
do
|
|
generate_email $oldrev $newrev $refname | send_mail
|
|
done
|
|
fi
|