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// Copyright 2018-2020 Parity Technologies (UK) Ltd.
// This file is part of cargo-contract.
//
// cargo-contract is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// cargo-contract is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with cargo-contract. If not, see <http://www.gnu.org/licenses/>.
use crate::workspace::ManifestPath;
use anyhow::{Context, Result};
use cargo_metadata::{Metadata as CargoMetadata, MetadataCommand, Package};
use semver::Version;
use serde_json::{Map, Value};
use std::{fs, path::PathBuf};
use toml::value;
use url::Url;
/// Relevant metadata obtained from Cargo.toml.
#[derive(Debug)]
pub struct CrateMetadata {
pub manifest_path: ManifestPath,
pub cargo_meta: cargo_metadata::Metadata,
pub package_name: String,
pub root_package: Package,
pub original_wasm: PathBuf,
pub dest_wasm: PathBuf,
pub ink_version: Version,
pub documentation: Option<Url>,
pub homepage: Option<Url>,
pub user: Option<Map<String, Value>>,
}
impl CrateMetadata {
/// Parses the contract manifest and returns relevant metadata.
pub fn collect(manifest_path: &ManifestPath) -> Result<Self> {
let (metadata, root_package) = get_cargo_metadata(manifest_path)?;
// Normalize the package name.
let package_name = root_package.name.replace("-", "_");
// {target_dir}/wasm32-unknown-unknown/release/{package_name}.wasm
let mut original_wasm = metadata.target_directory.clone();
original_wasm.push("wasm32-unknown-unknown");
original_wasm.push("release");
original_wasm.push(package_name.clone());
original_wasm.set_extension("wasm");
// {target_dir}/{package_name}.wasm
let mut dest_wasm = metadata.target_directory.clone();
dest_wasm.push(package_name.clone());
dest_wasm.set_extension("wasm");
let ink_version = metadata
.packages
.iter()
.find_map(|package| {
if package.name == "ink_lang" {
Some(
Version::parse(&package.version.to_string())
.expect("Invalid ink_lang version string"),
)
} else {
None
}
})
.ok_or(anyhow::anyhow!("No 'ink_lang' dependency found"))?;
let (documentation, homepage, user) = get_cargo_toml_metadata(manifest_path)?;
let crate_metadata = CrateMetadata {
manifest_path: manifest_path.clone(),
cargo_meta: metadata,
root_package,
package_name,
original_wasm,
dest_wasm,
ink_version,
documentation,
homepage,
user,
};
Ok(crate_metadata)
}
}
/// Get the result of `cargo metadata`, together with the root package id.
fn get_cargo_metadata(manifest_path: &ManifestPath) -> Result<(CargoMetadata, Package)> {
let mut cmd = MetadataCommand::new();
let metadata = cmd
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.exec()
.context("Error invoking `cargo metadata`")?;
let root_package_id = metadata
.resolve
.as_ref()
.and_then(|resolve| resolve.root.as_ref())
.context("Cannot infer the root project id")?
.clone();
// Find the root package by id in the list of packages. It is logical error if the root
// package is not found in the list.
let root_package = metadata
.packages
.iter()
.find(|package| package.id == root_package_id)
.expect("The package is not found in the `cargo metadata` output")
.clone();
Ok((metadata, root_package))
}
/// Read extra metadata not available via `cargo metadata` directly from `Cargo.toml`
fn get_cargo_toml_metadata(
manifest_path: &ManifestPath,
) -> Result<(Option<Url>, Option<Url>, Option<Map<String, Value>>)> {
let toml = fs::read_to_string(manifest_path)?;
let toml: value::Table = toml::from_str(&toml)?;
let get_url = |field_name| -> Result<Option<Url>> {
toml.get("package")
.ok_or(anyhow::anyhow!("package section not found"))?
.get(field_name)
.and_then(|v| v.as_str())
.map(Url::parse)
.transpose()
.context(format!("{} should be a valid URL", field_name))
.map_err(Into::into)
};
let documentation = get_url("documentation")?;
let homepage = get_url("homepage")?;
let user = toml
.get("package")
.and_then(|v| v.get("metadata"))
.and_then(|v| v.get("contract"))
.and_then(|v| v.get("user"))
.and_then(|v| v.as_table())
.map(|v| {
// convert user defined section from toml to json
serde_json::to_string(v).and_then(|json| serde_json::from_str(&json))
})
.transpose()?;
Ok((documentation, homepage, user))
}