Commit Graph

143 Commits

Author SHA1 Message Date
Chris Marchesi 8d06d68d0f core: Backport NewComputed change to nested list/set tests
Needed due to work done in 95d37ea, we may need to adjust
hasComputedSubKeys to propagate NewComputed in the same way that we
have added "~", however will wait for comment from @mitchellh.
2016-11-19 09:29:48 -08:00
Chris Marchesi f258056731 core: Tests for hasComputedSubKeys fix
This covers:

 * Complex sets with computed fields in a set
 * Complex lists with computed fields in a set

Adding a test to test basic lists with computed fields seemed to fail,
but possibly for an unrelated reason (the list returned as nil). The fix
to this inparticular case may be out of the scope of this specific
issue.

Reference gist and details in hashicorp/terraform#9171.
2016-11-19 08:56:16 -08:00
Mitchell Hashimoto 39542898b0
helper/schema: mark diff as forcenew if element is computed
Fixes #10125

If the elements are computed and the field is ForceNew, then we should
mark the computed count as potentially forcing a new operation.

Example, assuming `groups` forces new...

**Step 1:**

    groups = ["1", "2", "3"]

At this point, the resource isn't create, so this should result in a
diff like:

    CREATE resource:
      groups: "" => ["1", "2", "3"]

**Step 2:**

    groups = ["${computedvar}"]

The OLD behavior was:

    UPDATE resource
      groups.#: "3" => "computed"

This would cause a diff mismatch because if `${computedvar}` was
different then it should force new. The NEW behavior is:

    DESTROY/CREATE resource:
      groups.#: "3" => "computed" (forces new)
2016-11-15 11:02:14 -08:00
Mitchell Hashimoto 5792b2cba2
helper/schema: convert _Diff to subtests 2016-11-09 14:28:15 -08:00
Mitchell Hashimoto e45debe0e5
helper/schema: only mark "ForceNew" on resources that cause the ForceNew
Fixes #2748

This changes the diff to only mark "forces new resource" on the fields
that actually caused the new resource, not every field that changed.
This makes diffs much more accurate.

I'd like to request a review but I'm going to defer merging until
Terraform 0.8. Changes like this are very possible to cause "diffs
didn't match" errors and I want some real world testing in a beta before
we hit prod with this.
2016-11-08 15:49:28 -08:00
Mitchell Hashimoto b7bee66df5
helper/schema: sort errors in helper/schema test for deterministic tests 2016-11-04 16:51:26 -07:00
Mitchell Hashimoto f0abe6d1a0 Merge pull request #9812 from hashicorp/b-bool-computed-crash
helper/schema: computed bool fields should not crash
2016-11-04 08:47:49 -07:00
Mitchell Hashimoto 65b17ccd06
helper/schema: allow ConflictsWith and Computed Optional fields 2016-11-02 22:24:34 -07:00
Mitchell Hashimoto 7834cf7190
helper/schema: computed bool fields should not crash
Fixes #7715

If a bool field was computed and the raw value was not convertable to a
boolean, helper/schema would crash. The correct behavior is to try not
to read the raw value when the value is computed and to simply mark that
it is computed. This does that (and matches the behavior of the other
primitives).
2016-11-02 13:25:23 -07:00
Mitchell Hashimoto 2d84582881 Merge pull request #9699 from hashicorp/b-removed-forcenew
helper/schema: removed optional items force new
2016-10-31 13:24:36 -07:00
Mitchell Hashimoto 5489d8c549
helper/schema: removed optional items force new
Fixes #5138

If an item is optional and is removed completely from the configuration,
it should still trigger a destroy/create if the field itself was marked
as "ForceNew".

See the example in #5138.
2016-10-28 18:45:12 -04:00
Mitchell Hashimoto 95d37ea79c
helper/schema,terraform: handle computed primtives in diffs
Fixes #3309

There are two primary changes, one to how helper/schema creates diffs
and one to how Terraform compares diffs. Both require careful
understanding.

== 1. helper/schema Changes

helper/schema, given any primitive field (string, int, bool, etc.)
_used to_ create a basic diff when given a computed new value (i.e. from
an unkown interpolation). This would put in the plan that the old value
is whatever the old value was, and the new value was the actual
interpolation. For example, from #3309, the diff showed the following:

```
~ module.test.aws_eip.test-instance.0
    instance: "<INSTANCE ID>" => "${element(aws_instance.test-instance.*.id, count.index)}"
```

Then, when running `apply`, the diff would be realized and you would get
a diff mismatch error because it would realize the final value is the
same and remove it from the diff.

**The change:** `helper/schema` now marks unknown primitive values with
`NewComputed` set to true. Semantically this is correct for the diff to
have this information.

== 2. Terraform Diff.Same Changes

Next, the way Terraform compares diffs needed to be updated

Specifically, the case where the diff from the plan had a NewComputed
primitive and the diff from the apply _no longer has that value_. This
is possible if the computed value ended up being the same as the old
value. This is allowed to pass through.

Together, these fix #3309.
2016-10-25 22:36:59 -04:00
Mitchell Hashimoto fa9758e162
helper/schema: test with DiffSuppress and Default 2016-10-24 22:23:13 -07:00
stack72 5a537cdbf9
helper/schema: Adding of MinItems as a validation to Lists and Maps
This is required for the times when the configuration cannot have an
empty configuration. An example would be in AzureRM, when you create a
LoadBalancer with a configuration, you can delete *all* but 1 of these
configurations
2016-10-04 18:57:58 +01:00
James Nugent 85ec09111b helper/schema: Add diff suppression callback
This commit adds a new callback, DiffSuppressFunc, to  the schema.Schema
structure. If set for a given schema, a callback to the user-supplied
function will be made for each attribute for which the default
type-based diff mechanism produces an attribute diff. Returning `true`
from the callback will suppress the diff (i.e. pretend there was no
diff), and returning false will retain it as part of the plan.

There are a number of motivating examples for this - one of which is
included as an example:

1. On SSH public keys, trailing whitespace does not matter in many
   cases - and in some cases it is added by provider APIs. For
   digitalocean_ssh_key resources we previously had a StateFunc that
   trimmed the whitespace - we now have a DiffSuppressFunc which
   verifies whether the trimmed strings are equivalent.

2. IAM policy equivalence for AWS. A good proportion of AWS issues
   relate to IAM policies which have been "normalized" (used loosely)
   by the IAM API endpoints. This can make the JSON strings differ
   from those generated by iam_policy_document resources or template
   files, even though the semantics are the same (for example,
   reordering of `bucket-prefix/` and `bucket-prefix/*` in an S3
   bucket policy. DiffSupressFunc can be used to test for semantic
   equivalence rather than pure text equivalence, but without having to
   deal with the complexity associated with a full "provider-land" diff
   implementation without helper/schema.
2016-08-31 19:13:53 -05:00
Paul Hinze 3dccfa0cc9
terraform: diffs with only tainted set are non-empty
Fixes issue where a resource marked as tainted with no other attribute
diffs would never show up in the plan or apply as needing to be
replaced.

One unrelated test needed updating due to a quirk in the testDiffFn
logic - it adds a "type" field diff if the diff is non-Empty. NBD
2016-08-12 17:37:49 -05:00
clint shryock 7d71b8cc3c helper and terraform interpolate test update 2016-06-10 10:07:17 -05:00
James Nugent 074545e536 core: Use .% instead of .# for maps in state
The flatmapped representation of state prior to this commit encoded maps
and lists (and therefore by extension, sets) with a key corresponding to
the number of elements, or the unknown variable indicator under a .# key
and then individual items. For example, the list ["a", "b", "c"] would
have been encoded as:

    listname.# = 3
    listname.0 = "a"
    listname.1 = "b"
    listname.2 = "c"

And the map {"key1": "value1", "key2", "value2"} would have been encoded
as:

    mapname.# = 2
    mapname.key1 = "value1"
    mapname.key2 = "value2"

Sets use the hash code as the key - for example a set with a (fictional)
hashcode calculation may look like:

    setname.# = 2
    setname.12312512 = "value1"
    setname.56345233 = "value2"

Prior to the work done to extend the type system, this was sufficient
since the internal representation of these was effectively the same.
However, following the separation of maps and lists into distinct
first-class types, this encoding presents a problem: given a state file,
it is impossible to tell the encoding of an empty list and an empty map
apart. This presents problems for the type checker during interpolation,
as many interpolation functions will operate on only one of these two
structures.

This commit therefore changes the representation in state of maps to use
a "%" as the key for the number of elements. Consequently the map above
will now be encoded as:

    mapname.% = 2
    mapname.key1 = "value1"
    mapname.key2 = "value2"

This has the effect of an empty list (or set) now being encoded as:

    listname.# = 0

And an empty map now being encoded as:

    mapname.% = 0

Therefore we can eliminate some nasty guessing logic from the resource
variable supplier for interpolation, at the cost of having to migrate
state up front (to follow in a subsequent commit).

In order to reduce the number of potential situations in which resources
would be "forced new", we continue to accept "#" as the count key when
reading maps via helper/schema. There is no situation under which we can
allow "#" as an actual map key in any case, as it would not be
distinguishable from a list or set in state.
2016-06-09 10:49:42 +01:00
James Nugent f49583d25a core: support native list variables in config
This commit adds support for native list variables and outputs, building
up on the previous change to state. Interpolation functions now return
native lists in preference to StringList.

List variables are defined like this:

variable "test" {
    # This can also be inferred
    type = "list"
    default = ["Hello", "World"]
}

output "test_out" {
    value = "${var.a_list}"
}
This results in the following state:

```
...
            "outputs": {
                "test_out": [
                    "hello",
                    "world"
                ]
            },
...
```

And the result of terraform output is as follows:

```
$ terraform output
test_out = [
  hello
  world
]
```

Using the output name, an xargs-friendly representation is output:

```
$ terraform output test_out
hello
world
```

The output command also supports indexing into the list (with
appropriate range checking and no wrapping):

```
$ terraform output test_out 1
world
```

Along with maps, list outputs from one module may be passed as variables
into another, removing the need for the `join(",", var.list_as_string)`
and `split(",", var.list_as_string)` which was previously necessary in
Terraform configuration.

This commit also updates the tests and implementations of built-in
interpolation functions to take and return native lists where
appropriate.

A backwards compatibility note: previously the concat interpolation
function was capable of concatenating either strings or lists. The
strings use case was deprectated a long time ago but still remained.
Because we cannot return `ast.TypeAny` from an interpolation function,
this use case is no longer supported for strings - `concat` is only
capable of concatenating lists. This should not be a huge issue - the
type checker picks up incorrect parameters, and the native HIL string
concatenation - or the `join` function - can be used to replicate the
missing behaviour.
2016-05-10 14:49:14 -04:00
Paul Hinze b4df304b47
helper/schema: Normalize bools to "true"/"false" in diffs
For a long time now, the diff logic has relied on the behavior of
`mapstructure.WeakDecode` to determine how various primitives are
converted into strings.  The `schema.DiffString` function is used for
all primitive field types: TypeBool, TypeInt, TypeFloat, and TypeString.

The `mapstructure` library's string representation of booleans is "0"
and "1", which differs from `strconv.FormatBool`'s "false" and "true"
(which is used in writing out boolean fields to the state).

Because of this difference, diffs have long had the potential for
cosmetically odd but semantically neutral output like:

    "true" => "1"
    "false" => "0"

So long as `mapstructure.Decode` or `strconv.ParseBool` are used to
interpret these strings, there's no functional problem.

We had our first clear functional problem with #6005 and friends, where
users noticed diffs like the above showing up unexpectedly and causing
troubles when `ignore_changes` was in play.

This particular bug occurs down in Terraform core's EvalIgnoreChanges.
There, the diff is modified to account for ignored attributes, and
special logic attempts to handle properly the situation where the
ignored attribute was going to trigger a resource replacement. That
logic relies on the string representations of the Old and New fields in
the diff to be the same so that it filters properly.

So therefore, we now get a bug when a diff includes `Old: "0", New:
"false"` since the strings do not match, and `ignore_changes` is not
properly handled.

Here, we introduce `TypeBool`-specific normalizing into `finalizeDiff`.
I spiked out a full `diffBool` function, but figuring out which pieces
of `diffString` to duplicate there got hairy. This seemed like a simpler
and more direct solution.

Fixes #6005 (and potentially others!)
2016-05-05 09:00:58 -05:00
Chris Marchesi 8c5354b7dc Add MaxItems attribute to Schema
* MaxItems defines a maximum amount of items that can exist within a
   TypeSet or TypeList. Specific use cases would be if a TypeSet is being
   used to wrap a complex structure, however more than one instance would
   cause instability.
2016-02-23 16:41:32 -08:00
Mitchell Hashimoto 4576eaa966 helper/schema: replace config/lang 2016-02-03 13:24:04 -05:00
Paul Hinze 99244c5597 helper/schema: skip provider input for deprecated fields
There's no reason that a field that's been deprecated should ever
prompt.

fixes #4033
2015-12-07 11:28:45 -06:00
Paul Hinze c7dc1c10a3 helper/schema: skip StateFunc when value is nil
This takes the nil checking burden off of StateFunc.

fixes #3586, see that issue for further discussion
2015-11-20 14:07:18 -06:00
Paul Hinze 938281024f helper/schema: name test cases w/ strings
I promised myself that next time I jumped in this file I'd fix this up.
Now we don't have to manually index the file with comments, we can just
add descriptive names to the test cases!
2015-11-20 13:51:34 -06:00
Martin Atkins a67182543c Nicer error when list/map assigned to string argument.
Previous this would return the following sort of error:
expected type 'string', got unconvertible type '[]interface {}'

This is the raw error returned by the underlying mapstructure library.
This is not a helpful error message for anyone who doesn't know Go's
type system, and it exposes Terraform's internals to the UI.

Instead we'll catch these cases before we try to use mapstructure and
return a more straightforward message.

By checking the type before the IsComputed exception this also avoids
a crash caused when the assigned value is a computed list. Otherwise
the list of interpolations is allowed through here and then crashes later
during Diff when the value is not a primitive as expected.
2015-10-22 21:16:02 -07:00
Paul Hinze 2a179d1065 helper/schema: ValidateFunc support for maps 2015-10-14 15:10:22 -05:00
Panagiotis Moustafellos e4845f75cc removed extra parentheses 2015-10-08 15:48:04 +03:00
Martin Atkins cc8e8a55de helper/schema: Default hashing function for sets
A common issue with new resource implementations is not considering parts
of a complex structure that's used inside a set, which causes quirky
behavior.

The schema helper has enough information to provide a default reasonable
implementation of a set function that includes all non-computed attributes
in a deterministic way. Here we implement such a function and use it
when no explicit hashing function is provided.

In order to achieve this we encapsulate the construction of the zero
value for a schema in a new method schema.ZeroValue, which allows us to
put the fallback logic to the new default function in a single spot.
It is no longer valid to use &Set{F: schema.Set} and all uses of that
construct should be replaced with schema.ZeroValue().(*Set) .
2015-10-03 18:10:47 -07:00
Anthony Scalisi 198e1a5186 remove various typos 2015-09-11 11:56:20 -07:00
Paul Hinze 5c38456b05 core: don't prompt for variables with defaults
In `helper/schema` we already makes a distinction between `Default`
which is always applied and `InputDefault` which is displayed to the
user for an empty field.

But for variables we just have `Default` which is treated like
`InputDefault`. This changes it to _not_ prompt the user for a value
when the variable declaration includes a default.

Treating this as a UX bugfix and the "don't prompt for variables w/
defaults set" behavior as the originally expected behavior we were
failing to honor.

Added an already-passing test to verify and cover the `helper/schema`
behavior.

Perhaps down the road we can add a `input_default` attribute to
variables to allow similar behavior to `helper/schema` in variables, but
for now just sticking with the fix.

Fixes #2592
2015-07-02 10:40:30 -05:00
Mitchell Hashimoto 2f08a2bb15 Merge pull request #2507 from hashicorp/b-set-remove
helper/schema: diff should include removed set items [GH-1823]
2015-06-26 08:18:28 -07:00
Mitchell Hashimoto 6e509aedcb helper/schema: diff should include removed set items [GH-1823] 2015-06-25 21:52:49 -07:00
Paul Hinze 7238b3b4af core: encapsulate representation of StringList
Now the only code that cares about how StringLists are represented lives
inside string_list.go

...which gives us the ability to change it! :)
2015-06-25 17:55:57 -05:00
Paul Hinze 10b3abf405 config: introduce StringList to abstract over list hack
This is the initial pure "all tests passing without a diff" stage. The
plan is to change the internal representation of StringList to include a
suffix delimiter, which will allow us to recognize empty and
single-element lists.
2015-06-25 17:55:56 -05:00
Radek Simko 6fdbca8e58 Merge pull request #2466 from TimeIncOSS/f-schema-field-name-validate
schema: Add field name to ValidateFunc
2015-06-24 18:52:53 +01:00
Mitchell Hashimoto 6b7c2bcb35 Merge pull request #2450 from hashicorp/b-schema-validate-type
helper/schema: validate objects are objects [GH-2166]
2015-06-24 10:35:26 -07:00
Radek Simko 92db4802b6 schema: Add field name to ValidateFunc 2015-06-24 18:22:12 +01:00
Mitchell Hashimoto 4e7fcd4f42 helper/schema: test that validatefunc is not called with computed vals 2015-06-23 22:10:46 -07:00
Mitchell Hashimoto 4f391902a0 helper/schema: validate objects are objects [GH-2166] 2015-06-23 16:39:02 -07:00
Paul Hinze a4912cc51f helper/schema: limit ValidateFunc to primitives for now
I couldn't see a simple path get this working for Maps, Sets,
and Lists, so lets land it as a primitive-only schema feature.

I think validation on primitives comprises 80% of the use cases anyways.
2015-06-11 07:06:30 -05:00
Paul Hinze 49352db26f helper/schema: skip ValidateFunc on other errors
Guarantees that the `interface{}` arg to ValidateFunc is the proper
type, allowing implementations to be simpler.

Finish the docstring on `ValidateFunc` to call this out.

/cc @mitchellh
2015-06-08 08:55:45 -05:00
Paul Hinze 61fee6735d helper/schema: ValidateFunc
Allows provider authors to implement arbitrary per-field validation
warnings or errors.
2015-06-08 08:47:41 -05:00
Justin Campbell bb14bfa657 helper/schema: call InternalValidate w/ schemaMap{} 2015-05-12 11:01:08 -04:00
Paul Hinze cb3cbffb19 helper/schema: add test for statefunc with nested sets
refs #1759
2015-04-30 15:20:33 -05:00
Mitchell Hashimoto 707aa36aec helper/schema: only use ~ on first char of code 2015-04-23 17:20:54 +02:00
Mitchell Hashimoto 1f46bc1926 helper/schema: validate unknown fields with computed values [GH-1507] 2015-04-22 12:52:26 +02:00
Mitchell Hashimoto 54e3e6104e Merge pull request #1594 from TimeIncOSS/schema-conflicts-with
helper/schema: add schema.ConflictsWith[]
2015-04-22 08:04:49 +02:00
Mitchell Hashimoto 51951d68f4 helper/schema: change diff logic around maps to fix case #57 and #44 2015-04-21 22:13:03 +02:00
Radek Simko e0df74c863 Add schema.ConflictsWith[]
- this will allow defining logically conflicting attributes
2015-04-20 12:07:00 +01:00