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-rw-r--r--t/interop/interop-lib.sh92
1 files changed, 92 insertions, 0 deletions
diff --git a/t/interop/interop-lib.sh b/t/interop/interop-lib.sh
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+# Interoperability testing framework. Each script should source
+# this after setting default $VERSION_A and $VERSION_B variables.
+
+. ../../GIT-BUILD-OPTIONS
+INTEROP_ROOT=$(pwd)
+BUILD_ROOT=$INTEROP_ROOT/build
+
+build_version () {
+ if test -z "$1"
+ then
+ echo >&2 "error: test script did not set default versions"
+ return 1
+ fi
+
+ if test "$1" = "."
+ then
+ git rev-parse --show-toplevel
+ return 0
+ fi
+
+ sha1=$(git rev-parse "$1^{tree}") || return 1
+ dir=$BUILD_ROOT/$sha1
+
+ if test -e "$dir/.built"
+ then
+ echo "$dir"
+ return 0
+ fi
+
+ echo >&2 "==> Building $1..."
+
+ mkdir -p "$dir" || return 1
+
+ (cd "$(git rev-parse --show-cdup)" && git archive --format=tar "$sha1") |
+ (cd "$dir" && tar x) ||
+ return 1
+
+ for config in config.mak config.mak.autogen config.status
+ do
+ if test -e "$INTEROP_ROOT/../../$config"
+ then
+ cp "$INTEROP_ROOT/../../$config" "$dir/" || return 1
+ fi
+ done
+
+ (
+ cd "$dir" &&
+ make $GIT_INTEROP_MAKE_OPTS >&2 &&
+ touch .built
+ ) || return 1
+
+ echo "$dir"
+}
+
+# Old versions of git don't have bin-wrappers, so let's give a rough emulation.
+wrap_git () {
+ write_script "$1" <<-EOF
+ GIT_EXEC_PATH="$2"
+ export GIT_EXEC_PATH
+ PATH="$2:\$PATH"
+ export GIT_EXEC_PATH
+ exec git "\$@"
+ EOF
+}
+
+generate_wrappers () {
+ mkdir -p .bin &&
+ wrap_git .bin/git.a "$DIR_A" &&
+ wrap_git .bin/git.b "$DIR_B" &&
+ write_script .bin/git <<-\EOF &&
+ echo >&2 fatal: test tried to run generic git
+ exit 1
+ EOF
+ PATH=$(pwd)/.bin:$PATH
+}
+
+VERSION_A=${GIT_TEST_VERSION_A:-$VERSION_A}
+VERSION_B=${GIT_TEST_VERSION_B:-$VERSION_B}
+
+if ! DIR_A=$(build_version "$VERSION_A") ||
+ ! DIR_B=$(build_version "$VERSION_B")
+then
+ echo >&2 "fatal: unable to build git versions"
+ exit 1
+fi
+
+TEST_DIRECTORY=$INTEROP_ROOT/..
+TEST_OUTPUT_DIRECTORY=$INTEROP_ROOT
+TEST_NO_CREATE_REPO=t
+. "$TEST_DIRECTORY"/test-lib.sh
+
+generate_wrappers || die "unable to set up interop test environment"