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+# Create commits in <repo> and assign each commit's oid to shell variables
+# given in the arguments (A, B, and C). E.g.:
+#
+# create_commits_in <repo> A B C
+#
+# NOTE: Never calling this function from a subshell since variable
+# assignments will disappear when subshell exits.
+create_commits_in () {
+ repo="$1" && test -d "$repo" ||
+ error "Repository $repo does not exist."
+ shift &&
+ while test $# -gt 0
+ do
+ name=$1 &&
+ shift &&
+ test_commit -C "$repo" --no-tag "$name" &&
+ eval $name=$(git -C "$repo" rev-parse HEAD)
+ done
+}
+
+get_abbrev_oid () {
+ oid=$1 &&
+ suffix=${oid#???????} &&
+ oid=${oid%$suffix} &&
+ if test -n "$oid"
+ then
+ echo "$oid"
+ else
+ echo "undefined-oid"
+ fi
+}
+
+# Format the output of git-push, git-show-ref and other commands to make a
+# user-friendly and stable text. We can easily prepare the expect text
+# without having to worry about changes of the commit ID (full or abbrev.)
+# of the output. Single quotes are replaced with double quotes, because
+# it is boring to prepare unquoted single quotes in expect text. We also
+# remove some locale error messages. The emitted human-readable errors are
+# redundant to the more machine-readable output the tests already assert.
+make_user_friendly_and_stable_output () {
+ sed \
+ -e "s/'/\"/g" \
+ -e "s/$(get_abbrev_oid $A)[0-9a-f]*/<COMMIT-A>/g" \
+ -e "s/$(get_abbrev_oid $B)[0-9a-f]*/<COMMIT-B>/g" \
+ -e "s/$(get_abbrev_oid $TAG)[0-9a-f]*/<TAG-v123>/g" \
+ -e "s/$ZERO_OID/<ZERO-OID>/g" \
+ -e "s#To $URL_PREFIX/upstream.git#To <URL/of/upstream.git>#" \
+ -e "/^error: / d"
+}
+
+filter_out_user_friendly_and_stable_output () {
+ make_user_friendly_and_stable_output |
+ sed -n ${1+"$@"}
+}
+
+format_and_save_expect () {
+ sed -e 's/^> //' -e 's/Z$//' >expect
+}
+
+test_cmp_refs () {
+ indir=
+ if test "$1" = "-C"
+ then
+ shift
+ indir="$1"
+ shift
+ fi
+ indir=${indir:+"$indir"/}
+ cat >show-ref.expect &&
+ git ${indir:+ -C "$indir"} show-ref >show-ref.pristine &&
+ make_user_friendly_and_stable_output <show-ref.pristine >show-ref.filtered &&
+ test_cmp show-ref.expect show-ref.filtered
+}