test-pull-summary-sigs: Set timestamps to serve expected files

If this is not done, the test can fail when the temporary directory is
a tmpfs: for example this happens during build-time testing with /var/tmp
on tmpfs or TEST_TMPDIR pointing to a tmpfs, or installed-tests with
gnome-desktop-testing-runner allocating the test directory on a tmpfs.

In particular, many of Debian's official autobuilders now do the entire
build and test procedure in a chroot hosted on a tmpfs, to improve build
performance and prevent fsync overhead.

In this situation, it appears that overwriting summary.sig with a copy
of summary.sig.2 is not sufficient for the web server to tell the
libostree client that it needs to be re-downloaded. I'm not completely
sure why, because tmpfs does appear to have sub-second-resolution
timestamps, but forcing a distinct mtime is certainly enough to
resolve it.

Resolves: ostreedev/ostree#2245
Bug-Debian: https://bugs.debian.org/975418
Signed-off-by: Simon McVittie <[email protected]>
(cherry picked from commit 07c4249)

tests/test-pull-summary-sigs.sh

@@ -175,6 +175,8 @@ cd ${test_tmpdir}
 # Reset to the old valid summary and pull to cache it
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 repo_reinit
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
@@ -186,6 +188,7 @@ cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summ
 # summary signature since it was generated on the server between the
 # requests
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 if ${OSTREE} --repo=repo pull origin main 2>err.txt; then
     assert_not_reached "Successful pull with old summary"
 fi
@@ -197,6 +200,7 @@ cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summ
 
 # Publish correct summary and check that subsequent pull succeeds
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
 assert_has_file repo/tmp/cache/summaries/origin.sig
@@ -208,6 +212,8 @@ echo "ok pull with signed summary remote old summary"
 # Reset to the old valid summary and pull to cache it
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 repo_reinit
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
@@ -220,6 +226,7 @@ cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summ
 # is caching the old signature. This should succeed because the cached
 # old summary is used.
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
 assert_has_file repo/tmp/cache/summaries/origin.sig
@@ -228,6 +235,7 @@ cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summ
 
 # Publish correct signature and check that subsequent pull succeeds
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
 assert_has_file repo/tmp/cache/summaries/origin.sig
@@ -239,6 +247,8 @@ echo "ok pull with signed summary remote old summary signature"
 # Reset to the old valid summary and pull to cache it
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.1,}
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.1,}
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary
+touch -t 200101010101 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 repo_reinit
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
@@ -273,6 +283,8 @@ cmp repo/tmp/cache/summaries/origin.sig ${test_tmpdir}/ostree-srv/gnomerepo/summ
 # Publish new signature and check that subsequent pull succeeds
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary{.2,}
 cp ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig{.2,}
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary
+touch -t 200202020202 ${test_tmpdir}/ostree-srv/gnomerepo/summary.sig
 ${OSTREE} --repo=repo pull origin main
 assert_has_file repo/tmp/cache/summaries/origin
 assert_has_file repo/tmp/cache/summaries/origin.sig