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Add pallet dev mode (#12536)

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* stub for construct_dev_runtime!

* revert

* stub for dev_mode proc macro

* preliminary docs for pallet::dev_mode (attribute) proc macro

* add dev_mode to pallet_macros module

* add docs item for dev_mode to frame_support

* parsing of #[pallet(dev_mode)]

* strip out dev_mode stub since it will be an arg for pallet instead

* make pallet Def struct aware of dev mode

* WIP

* revert changes to call.rs

* pass dev_mode to pallet parsing code

* auto-specify default weights when in dev mode if not specified

* add proof / expect for syn::parse in dev mode weight processing

* set all storages to unbounded when in dev mode

* just use 0

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>

* add invalid pallet arg test

* add passing dev mode pallet test

* add test confirming that dev mode features only work in dev mode

* cargo fmt + clean up

* bump CI

* fix pallet ui test

* add docs for dev mode

* add warning about using dev mode in production circumstances

* remove comment about no other attributes being supported

* fix unneeded assignment

* make warning more explicit

* more explicit warning about using dev mode in production

* simpler assignment for dev_mode boolean

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* add note about MEL requirement

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* add comment specifying why weights can be omitted in example

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* tweak wording of comments

* bump ci

Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
This commit is contained in:
Sam Johnson
2022-11-07 16:40:55 -05:00
committed by GitHub
parent cf5c78dbe8
commit 7c4bfc9749
14 changed files with 233 additions and 12 deletions
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substrate/frame/support/procedural/src/lib.rs
+28
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@@ -445,6 +445,34 @@ pub fn construct_runtime(input: TokenStream) -> TokenStream {
/// pallet. Otherwise it implements `StorageInfoTrait` for the pallet using the
/// `PartialStorageInfoTrait` implementation of storages.
///
/// ## Dev Mode (`#[pallet(dev_mode)]`)
///
/// Specifying the argument `dev_mode` will allow you to enable dev mode for a pallet. The aim
/// of dev mode is to loosen some of the restrictions and requirements placed on production
/// pallets for easy tinkering and development. Dev mode pallets should not be used in
/// production. Enabling dev mode has the following effects:
///
/// * Weights no longer need to be specified on every `#[pallet::call]` declaration. By default, dev
/// mode pallets will assume a weight of zero (`0`) if a weight is not specified. This is
/// equivalent to specifying `#[weight(0)]` on all calls that do not specify a weight.
/// * All storages are marked as unbounded, meaning you do not need to implement `MaxEncodedLen` on
/// storage types. This is equivalent to specifying `#[pallet::unbounded]` on all storage type
/// definitions.
///
/// Note that the `dev_mode` argument can only be supplied to the `#[pallet]` or
/// `#[frame_support::pallet]` attribute macro that encloses your pallet module. This argument
/// cannot be specified anywhere else, including but not limited to the `#[pallet::pallet]`
/// attribute macro.
///
/// <div class="example-wrap" style="display:inline-block"><pre class="compile_fail"
/// style="white-space:normal;font:inherit;">
/// <strong>WARNING</strong>:
/// You should not deploy or use dev mode pallets in production. Doing so can break your chain
/// and therefore should never be done. Once you are done tinkering, you should remove the
/// 'dev_mode' argument from your #[pallet] declaration and fix any compile errors before
/// attempting to use your pallet in a production scenario.
/// </pre></div>
///
/// See `frame_support::pallet` docs for more info.
#[proc_macro_attribute]
pub fn pallet(attr: TokenStream, item: TokenStream) -> TokenStream {