Add Makefiles and simple test suite

Makefile

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+.PHONY: clean all test
+
+test:
+	go test
+	$(MAKE) -C cmd/khepri
+	test/run.sh cmd/khepri/khepri
+
+clean:
+	go clean
+	$(MAKE) -C cmd/khepri test

cmd/khepri/Makefile

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+.PHONY: clean all test
+
+test:
+	go build
+
+clean:
+	go clean

test/run.sh

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+#!/bin/bash
+
+set -e
+
+export khepri="${1:-khepri}"; shift
+export dir=$(dirname "$0")
+export fake_data_file="${dir}/fake-data.tar.gz"
+
+k() {
+    "${khepri}" "$@"
+}
+
+prepare() {
+    export BASE="$(mktemp --tmpdir --directory khepri-testsuite-XXXXXX)"
+    export KHEPRI_REPOSITORY="${BASE}/khepri-backup"
+    export DATADIR="${BASE}/fake-data"
+    debug "repository is at ${KHEPRI_REPOSITORY}"
+
+    mkdir -p "$DATADIR"
+    (cd "$DATADIR"; tar xz) < "$fake_data_file"
+    debug "extracted fake data to ${DATADIR}"
+}
+
+cleanup() {
+    if [ "$DEBUG" = "1" ]; then
+        debug "leaving dir ${BASE}"
+        return
+    fi
+
+    rm -rf "${BASE}"
+    debug "removed dir ${BASE}"
+    unset BASE
+    unset KHEPRI_REPOSITORY
+}
+
+msg() {
+    printf "%s: %s\n" "$(basename "$0" .sh)" "$*"
+}
+
+pass() {
+    printf "\e[32m%s: %s\e[39m\n" "$(basename "$0" .sh)" "$*"
+}
+
+err() {
+    printf "\e[31m%s: %s\e[39m\n" "$(basename "$0" .sh)" "$*"
+}
+
+debug() {
+    if [ "$DEBUG" = "1" ]; then
+        printf "\e[33m%s: %s\e[39m\n" "$(basename "$0" .sh)" "$*"
+    fi
+}
+
+fail() {
+    err "$@"
+    exit 1
+}
+
+run() {
+    if [ "$DEBUG" = "1" ]; then
+        "$@"
+    else
+        "$@" > /dev/null
+    fi
+}
+
+export -f k prepare cleanup msg debug pass err fail run
+
+if [ ! -x "$khepri" ]; then
+    fail khepri binary not found!
+fi
+
+if [ "$#" -gt 0 ]; then
+    testfiles="$1"
+else
+    testfiles=(${dir}/test-*.sh)
+fi
+
+echo "testfiles: $testfiles"
+
+for testfile in "$testfiles"; do
+    current=$(basename "${testfile}" .sh)
+
+    bash "${testfile}"
+    if [ "$?" != "0" ]; then
+        err "${current} failed!"
+    else
+        pass "${current} pass"
+    fi
+done

test/test-backup.sh

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+prepare
+run k backup "${BASE}/fake-data"
+run k restore "$(k list ref)" "${BASE}/fake-data-restore"
+diff -aur "${BASE}/fake-data" "${BASE}/fake-data-restore"
+cleanup