Implement fast resume; refactor GetDuplicacyPreferencePath()

integration_tests/resume_test.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+
+. ./test_functions.sh
+
+fixture
+
+pushd ${TEST_REPO}
+${DUPLICACY} init integration-tests $TEST_STORAGE -c 4k
+
+# Create 10 20k files
+add_file file1 20000
+add_file file2 20000
+add_file file3 20000
+add_file file4 20000
+add_file file5 20000
+add_file file6 20000
+add_file file7 20000
+add_file file8 20000
+add_file file9 20000
+add_file file10 20000
+
+# Limit the rate to 10k/s so the backup will take about 10 seconds
+${DUPLICACY} backup -limit-rate 10 -threads 4 &
+# Kill the backup after 3 seconds
+DUPLICACY_PID=$!
+sleep 3
+kill -2 ${DUPLICACY_PID}
+
+# Try it again to test the multiple-resume case
+${DUPLICACY} backup -limit-rate 10  -threads 4&
+DUPLICACY_PID=$!
+sleep 3
+kill -2 ${DUPLICACY_PID}
+
+# Fail the backup before uploading the snapshot
+env DUPLICACY_FAIL_SNAPSHOT=true ${DUPLICACY} backup
+
+# Now complete the backup
+${DUPLICACY} backup
+${DUPLICACY} check --files
+popd