7 Commits (653a819cc3a2d2c7fb3f6a26b03f4e8a95e4d585)

Author	SHA1	Message	Date
Alisdair McDiarmid	f54e2a62bf	states: Fix coverage blips in statemgr/filesystem ... Something non-deterministic in the test suite is causing a coverage blip in a line in the filesystem state manager. This commit adds a test which specifically covers that line, which hopefully pleases the Codecov robot.	6 years ago
Martin Atkins	e8f9fad0e3	states/statemgr: use -mod=vendor to run the state locking helper ... This ensures that we test using the same source as we're using everywhere else, and more tactically also ensures that when running in Travis-CI we won't try to download all of the dependencies of Terraform during this test. In the long run we will look for a more global solution to this, rather than adding this to all of our embedded "go" command calls directly, but this is intended as a low-risk solution to get the build working again in the mean time.	7 years ago
Martin Atkins	5255e85238	"go fmt" fixups ... Apparently my editor is still not reliably formatting on save, so I missed a few formatting quirks in these files.	8 years ago
Martin Atkins	48601d261d	states/statemgr: In Filesystem, back up output file, not input file ... The filesystem backend has the option of using a different file for its initial read. Previously we were incorrectly writing the contents of that file out into the backup file, rather than the prior contents of the output file. Now we will always read the output file in RefreshState in order to decide what we will back up but then we will optionally additionally read the input file and prefer its content as the "current" state snapshot. This is verified by command.TestMetaBackend_planLocalStatePath and TestMetaBackend_configureNew, which are both now passing.	8 years ago
Martin Atkins	985b414dca	states/statemgr: Fix the Filesystem state manager tests ... Now that we're verifying the Terraform version during state loading, we need to force a particular Terraform version to use during these tests.	8 years ago
Martin Atkins	05936df0e7	statemgr: Backup file support for statemgr.Filesystem ... In the old state package we had this as a separate manager state.BackupState, but that doesn't work with our new interfaces because we handle lineage and serial within the state managers themselves and don't expose them to callers anymore. In practice it being built in to the filesystem manager is not a problem because we only use the backup functionality for local state anyway. This also slightly adjusts the behavior to be more intuitive. The old BackupState relied on the implementation detail that Terraform re-persists the original state early in an apply operation, which meant that by coincidence it would back up the right snapshot. In this new approach, we instead take an in-memory copy during State and then write _that_ to disk in WriteState if the new state seems different, so we're guaranteed that we'll always write out what we read before any changes were made. In future we may improve this further, such as keeping multiple generations of backups, etc. But for now this is intended to preserve the goals of the original implementation while making its behavior self-contained and not dependent on coincidences.	8 years ago
Martin Atkins	53cafc542b	statemgr: New package for state managers ... This idea of a "state manager" was previously modelled via the confusingly-named state.State interface, which we've been calling a "state manager" only in some local variable names in situations where there were also *terraform.State variables. As part of reworking our state models to make room for the new type system, we also need to change what was previously the state.StateReader interface. Since we've found the previous organization confusing anyway, here we just copy all of those interfaces over into statemgr where we can make the relationship to states.State hopefully a little clearer. This is not yet a complete move of the functionality from "state", since we're not yet ready to break existing callers. In a future commit we'll turn the interfaces in the old "state" package into aliases of the interfaces in this package, and update all the implementers of what will by then be statemgr.Reader to use *states.State instead of *terraform.State. This also includes an adaptation of what was previously state.LocalState into statemgr.FileSystem, using the new state serialization functionality from package statefile instead of the old terraform.ReadState and terraform.WriteState.	8 years ago