# "t=%s; printf 'http://.../?id=%%s' \$t; echo;echo; git show -C \$t; echo"
# Be careful if "..." contains things that will be expanded by shell "eval"
# or printf.
+# hooks.emailmaxlines
+# The maximum number of lines that should be included in the generated
+# email body. If not specified, there is no limit.
+# Lines beyond the limit are suppressed and counted, and a final
+# line is added indicating the number of suppressed lines.
#
# Notes
# -----
# ---------------------------- Functions
#
-# Top level email generation function. This decides what type of update
-# this is and calls the appropriate body-generation routine after outputting
-# the common header
+# Function to prepare for email generation. This decides what type
+# of update this is and whether an email should even be generated.
#
-# Note this function doesn't actually generate any email output, that is
-# taken care of by the functions it calls:
-# - generate_email_header
-# - generate_create_XXXX_email
-# - generate_update_XXXX_email
-# - generate_delete_XXXX_email
-# - generate_email_footer
-#
-generate_email()
+prep_for_email()
{
# --- Arguments
oldrev=$(git rev-parse $1)
newrev=$(git rev-parse $2)
refname="$3"
+ maxlines=$4
# --- Interpret
# 0000->1234 (create)
# Anything else (is there anything else?)
echo >&2 "*** Unknown type of update to $refname ($rev_type)"
echo >&2 "*** - no email generated"
- exit 1
+ return 0
;;
esac
esac
echo >&2 "*** $config_name is not set so no email will be sent"
echo >&2 "*** for $refname update $oldrev->$newrev"
- exit 0
+ return 0
fi
+ return 1
+}
+
+#
+# Top level email generation function. This calls the appropriate
+# body-generation routine after outputting the common header.
+#
+# Note this function doesn't actually generate any email output, that is
+# taken care of by the functions it calls:
+# - generate_email_header
+# - generate_create_XXXX_email
+# - generate_update_XXXX_email
+# - generate_delete_XXXX_email
+# - generate_email_footer
+#
+# Note also that this function cannot 'exit' from the script; when this
+# function is running (in hook script mode), the send_mail() function
+# is already executing in another process, connected via a pipe, and
+# if this function exits without, whatever has been generated to that
+# point will be sent as an email... even if nothing has been generated.
+#
+generate_email()
+{
# Email parameters
# The email subject will contain the best description of the ref
# that we can build from the parameters
fn_name=atag
;;
esac
- generate_${change_type}_${fn_name}_email
+
+ if [ -z "$maxlines" ]; then
+ generate_${change_type}_${fn_name}_email
+ else
+ generate_${change_type}_${fn_name}_email | limit_lines $maxlines
+ fi
generate_email_footer
}
# Generate header
cat <<-EOF
To: $recipients
- Subject: ${emailprefix}$projectdesc $refname_type, $short_refname, ${change_type}d. $describe
+ Subject: ${emailprefix}$projectdesc $refname_type $short_refname ${change_type}d. $describe
X-Git-Refname: $refname
X-Git-Reftype: $refname_type
X-Git-Oldrev: $oldrev
}
+limit_lines()
+{
+ lines=0
+ skipped=0
+ while IFS="" read -r line; do
+ lines=$((lines + 1))
+ if [ $lines -gt $1 ]; then
+ skipped=$((skipped + 1))
+ else
+ printf "%s\n" "$line"
+ fi
+ done
+ if [ $skipped -ne 0 ]; then
+ echo "... $skipped lines suppressed ..."
+ fi
+}
+
+
send_mail()
{
if [ -n "$envelopesender" ]; then
envelopesender=$(git config hooks.envelopesender)
emailprefix=$(git config hooks.emailprefix || echo '[SCM] ')
custom_showrev=$(git config hooks.showrev)
+maxlines=$(git config hooks.emailmaxlines)
# --- Main loop
# Allow dual mode: run from the command line just like the update hook, or
# 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
+ prep_for_email $2 $3 $1 && PAGER= generate_email
else
while read oldrev newrev refname
do
- generate_email $oldrev $newrev $refname | send_mail
+ prep_for_email $oldrev $newrev $refname || continue
+ generate_email $maxlines | send_mail
done
fi