[GnoVM] Whitelist deployment paths instead of import paths #1865
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This is an issue I was aware of. #1695 fixes it, removing the The reason why it exists in the first place, is that the current transpiler is selective on what it can transpile or not; partly due to the fact that it does not attempt to transpile standard libraries. For this reason, when transpiling, the stdlibs have to exist in both Gno and Go; and have matching function names and signatures. (Hence, the reason for stdshim, which is instead transpiled). #1695 allows full transpilation without exceptions, and thus no restrictions on this front. As of the recently merged #1702, the transpiler check is no longer in the |
gfanton
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Jul 23, 2024
Merge order: 1. gnolang#1700 2. gnolang#1702 3. gnolang#1695 (this one!) -- review earlier ones first, if they're still open! This PR modifies the Gno transpiler (fka precompiler) to use Gno's standard libraries rather than Go's when performing transpilation. This creates the necessity to transpile Gno standard libraries, and as such support their native bindings. And it removes the necessity for a package like `stdshim`, and a mechanism like `stdlibWhitelist`. - Fixes gnolang#668. Fixes gnolang#1865. - Resolves gnolang#892. - Part of gnolang#814. - Makes gnolang#1475 / gnolang#1576 possible without using hacks like `stdshim`. cc/ @leohhhn @tbruyelle, as this relates to your work ## Why? - This PR enables us to perform Go type-checking across the board, and not use Go's standard libraries in transpiled code. This enables us to _properly support our own standard libraries_, such as `std` but any others we might want or need. - It also paves the way further to go full circle, and have Gno code be transpiled to Go, and then have "compilable" gno code ## Summary of changes - The transpiler has been thoroughly refactored. - The biggest change is described above: instead of maintaing the import paths like `"strconv"` and `"math"` the same (so using Gno's stdlibs in Gno, and Go's in Go), the import paths for standard libraries is now also updated to point to the Gno standard libraries. - Native functions are handled by removing their definitions when transpiling, and changing their call expressions where appropriate. This links the transpiled code directly to their native counterparts. - This removes the necessity for `stdlibWhitelist`. - As a consequence, `stdshim` is no longer needed and has been removed. - Test files are still not "strictly checked": they may reference stdlibs with no matching source, and will not be tested when running with `--gobuild`. This is because packages like `fmt` have no representation in Gno code; they only exist as injections in `tests/imports.go`. I'll fix this eventually :) - The CLI (`gno transpile`) has been changed to reflect the above changes. - Flag `--skip-fmt` has been removed (the result of transpile is always formatted, anyway), and `--gofmt-binary` too, obviously. `gno transpile` does not perform validation, but will gladly provide helpful validation with the `--gobuild` flag. - There is another PR that adds type checking in `gno lint`, without needing to run through the transpilation step first: gnolang#1730 - It now works by default by looking at "packages" rather than individual files. This is necessary so that when performing `transpile` on the `examples` directory, we can skip those where the gno.mod marks the module as draft. These modules make use of packages like "fmt", which because they don't have an underlying gno/go source, cannot be transpiled. - Running with `-gobuild` now handles more errors correctly; ie., all errors not previously captured by the `errorRe` which only matches those pertaining to a specific file/line. - `gnoFilesFromArgs` was unused and as such deleted - `gnomod`'s behaviour was slightly changed. - I am of the opinion that `gno mod download` should not precompile what it downloads; _especially_ to gather the dependencies it has. I've changed it so that it does a `OnlyImports` parse of the file it downloads to fetch additional dependencies Misc: - `Makefile` now contains a recipe to calculate the coverage for `gnovm/cmd/gno`, and also view it via the HTML interface. This is needed as it has a few extra steps (which @gfanton already previously added in the CI). - Realms r/demo/art/gnoface and r/x/manfred_outfmt have been marked as draft, as they depend on packages which are not actually present in the Gno standard libraries. - The transpiler now ignores draft packages by default. - `ReadMemPackage` now also considers Go files. This is meant to have on-chain the code for standard libraries like `std` which have native bindings. We still exclude Go code if it's not in a standard library. - `//go:build` constraints have been removed from standard libraries, as go files can only have one and we already add our own when transpiling ## Further improvements after this PR - Scope understanding in `transpiler` (so call expressions are not incorrectly rewritten) - Correctly transpile gno.mod --------- Co-authored-by: Antonio Navarro Perez <antnavper@gmail.com> Co-authored-by: Miloš Živković <milos.zivkovic@tendermint.com>
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Description
It seems that in transpile.go, some imports are not allowed. Why is this?
Currently, it seems that imports from
p/demo&r/are allowed, along with packages from the stdlibs whitelist.From a DevX perspective, it makes much more sense to not allow deployment to specific paths, instead of not allowing imports. People can get stuck with a package that has been deployed successfully, but is not importable - this clogs on-chain storage, and makes for temporarily or permanently useless code.
This is part of a larger namespacing issue.
EDIT: I noticed a weird thing that is happening: when deploying to a local network, the above rules apply. However, when working with Portal Loop, it seems that packages under
p/can also be namespaced. Here is an example.cc @zivkovicmilos, @gfanton
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