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Add new crate leon-macros that provide template! with identical syntax as runtime parsing (#946)

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`leon_macros::template!` can parse template at compile-time.
It accepts a utf-8 string literal and uses `leon` internally to parse it, then generate code that evaluates to `Template<'static>`.

 - Exclude fuzz from crate leon when publishing
 - Impl fn-like proc-macro `leon_macros::template!`
 - Add dep `leon-macros` to binstalk
 - Use `leon_macros::template!` in `binstalk::fetchers::gh_crate_meta::hosting`
 - Add doc for `leon-macros` in `leon`
 - Improve `std::fmt::Display` impl for `leon::ParseError`
 - Fixed broken infra link in leon

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>
This commit is contained in:
Jiahao XU 2023-04-17 14:50:58 +10:00 • committed by GitHub
parent fa0455a417
commit 5683ca2476
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
18 changed files with 373 additions and 91 deletions
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4
.github/dependabot.yml vendored
View file

@ -52,3 +52,7 @@ updates:
directory: "/crates/leon"
schedule:
interval: "daily"
- package-ecosystem: "cargo"
directory: "/crates/leon-macros"
schedule:
interval: "daily"

1
.github/workflows/release-pr.yml vendored
View file

@ -17,6 +17,7 @@ on:
- fs-lock
- normalize-path
- leon
- leon-macros
version:
description: Version to release
required: true

11
Cargo.lock generated
View file

@ -231,6 +231,7 @@ dependencies = [
"itertools",
"jobslot",
"leon",
"leon-macros",
"maybe-owned",
"miette",
"normalize-path",
@ -1338,6 +1339,16 @@ dependencies = [
"tinytemplate",
]
[[package]]
name = "leon-macros"
version = "0.0.0"
dependencies = [
"leon",
"proc-macro2",
"quote",
"syn 2.0.15",
]
[[package]]
name = "libc"
version = "0.2.141"

1
Cargo.toml
View file

@ -10,6 +10,7 @@ members = [
"crates/normalize-path",
"crates/detect-targets",
"crates/leon",
"crates/leon-macros",
]
[profile.release]

2
crates/bin/src/args.rs
View file

@ -31,7 +31,7 @@ use strum_macros::EnumCount;
pub struct Args {
/// Packages to install.
///
/// Syntax: crate[@version]
/// Syntax: `crate[@version]`
///
/// Each value is either a crate name alone, or a crate name followed by @ and the version to
/// install. The version syntax is as with the --version option.

1
crates/binstalk/Cargo.toml
View file

@ -22,6 +22,7 @@ home = "0.5.4"
itertools = "0.10.5"
jobslot = { version = "0.2.11", features = ["tokio"] }
leon = { version = "1.0.0", path = "../leon" }
leon-macros = { version = "0.0.0", path = "../leon-macros" }
maybe-owned = "0.3.4"
miette = "5.7.0"
normalize-path = { version = "0.2.0", path = "../normalize-path" }

63
crates/binstalk/src/fetchers/gh_crate_meta/hosting.rs
View file

@ -1,5 +1,6 @@
use itertools::Itertools;
use leon::{template, Item, Template};
use leon::{Item, Template};
use leon_macros::template;
use url::Url;
use crate::errors::BinstallError;
@ -16,62 +17,36 @@ pub enum RepositoryHost {
/// Make sure to update possible_dirs in `bins::infer_bin_dir_template`
/// if you modified FULL_FILENAMES or NOVERSION_FILENAMES.
pub const FULL_FILENAMES: &[Template<'_>] = &[
template!("/", { "name" }, "-", { "target" }, "-v", { "version" }, {
"archive-suffix"
}),
template!("/", { "name" }, "-", { "target" }, "-", { "version" }, {
"archive-suffix"
}),
template!("/", { "name" }, "-", { "version" }, "-", { "target" }, {
"archive-suffix"
}),
template!("/", { "name" }, "-v", { "version" }, "-", { "target" }, {
"archive-suffix"
}),
template!("/", { "name" }, "_", { "target" }, "_v", { "version" }, {
"archive-suffix"
}),
template!("/", { "name" }, "_", { "target" }, "_", { "version" }, {
"archive-suffix"
}),
template!("/", { "name" }, "_", { "version" }, "_", { "target" }, {
"archive-suffix"
}),
template!("/", { "name" }, "_v", { "version" }, "_", { "target" }, {
"archive-suffix"
}),
template!("/{ name }-{ target }-v{ version }{ archive-suffix }"),
template!("/{ name }-{ target }-{ version }{ archive-suffix }"),
template!("/{ name }-{ version }-{ target }{ archive-suffix }"),
template!("/{ name }-v{ version }-{ target }{ archive-suffix }"),
template!("/{ name }_{ target }_v{ version }{ archive-suffix }"),
template!("/{ name }_{ target }_{ version }{ archive-suffix }"),
template!("/{ name }_{ version }_{ target }{ archive-suffix }"),
template!("/{ name }_v{ version }_{ target }{ archive-suffix }"),
];
pub const NOVERSION_FILENAMES: &[Template<'_>] = &[
template!("/", { "name" }, "-", { "target" }, { "archive-suffix" }),
template!("/", { "name" }, "_", { "target" }, { "archive-suffix" }),
template!("/{ name }-{ target }{ archive-suffix }"),
template!("/{ name }_{ target }{ archive-suffix }"),
];
const GITHUB_RELEASE_PATHS: &[Template<'_>] = &[
template!({ "repo" }, "/releases/download/", { "version" }),
template!({ "repo" }, "/releases/download/v", { "version" }),
template!("{ repo }/releases/download/{ version }"),
template!("{ repo }/releases/download/v{ version }"),
];
const GITLAB_RELEASE_PATHS: &[Template<'_>] = &[
template!(
{ "repo" },
"/-/releases/",
{ "version" },
"/downloads/binaries"
),
template!(
{ "repo" },
"/-/releases/v",
{ "version" },
"/downloads/binaries"
),
template!("{ repo }/-/releases/{ version }/downloads/binaries"),
template!("{ repo }/-/releases/v{ version }/downloads/binaries"),
];
const BITBUCKET_RELEASE_PATHS: &[Template<'_>] = &[template!({ "repo" }, "/downloads")];
const BITBUCKET_RELEASE_PATHS: &[Template<'_>] = &[template!("{ repo }/downloads")];
const SOURCEFORGE_RELEASE_PATHS: &[Template<'_>] = &[
template!({ "repo" }, "/files/binaries/", { "version" }),
template!({ "repo" }, "/files/binaries/v", { "version" }),
template!("{ repo }/files/binaries/{ version }"),
template!("{ repo }/files/binaries/v{ version }"),
];
impl RepositoryHost {

2
crates/binstalk/src/helpers/futures_resolver.rs
View file

@ -1,7 +1,7 @@
use std::{future::Future, pin::Pin};
use tokio::sync::mpsc;
/// Given multiple futures with output = Result<Option<T>, E>,
/// Given multiple futures with output = `Result<Option<T>, E>`,
/// returns the the first one that returns either `Err(_)` or
/// `Ok(Some(_))`.
pub struct FuturesResolver<T, E> {

19
crates/leon-macros/Cargo.toml Normal file
View file

@ -0,0 +1,19 @@
[package]
name = "leon-macros"
version = "0.0.0"
edition = "2021"
description = "Proc macros for crate leon"
repository = "https://github.com/cargo-bins/cargo-binstall"
documentation = "https://docs.rs/leon-macros"
rust-version = "1.61.0"
authors = ["Félix Saparelli <felix@passcod.name>", "Jiahao XU Jiahao_XU@outlook"]
license = "Apache-2.0 OR MIT"
[lib]
proc-macro = true
[dependencies]
leon = { version = "1.0.0", path = "../leon", default-features = false }
proc-macro2 = "1.0.56"
syn = { version = "2.0.15", default-features = false, features = ["proc-macro", "parsing"] }
quote = "1.0.26"

176
crates/leon-macros/LICENSE-APACHE Normal file
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@ -0,0 +1,176 @@
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23
crates/leon-macros/LICENSE-MIT Normal file
View file

@ -0,0 +1,23 @@
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

36
crates/leon-macros/src/lib.rs Normal file
View file

@ -0,0 +1,36 @@
use leon::{Item, Template};
use quote::quote;
use syn::{parse_macro_input, LitStr};
#[proc_macro]
pub fn template(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
let input = parse_macro_input!(input as LitStr).value();
#[allow(clippy::unnecessary_to_owned)]
let items = Template::parse(&input)
.unwrap()
.items
.into_owned()
.into_iter()
.map(|item| match item {
Item::Text(text) => quote! {
::leon::Item::Text(#text)
},
Item::Key(key) => quote! {
::leon::Item::Key(#key)
},
});
quote! {
::leon::Template::new(
{
const ITEMS: &'static [::leon::Item<'static>] = &[
#(#items),*
];
ITEMS
},
::core::option::Option::None,
)
}
.into()
}

21
crates/leon-macros/tests/parsing.rs Normal file
View file

@ -0,0 +1,21 @@
use leon::{Item, Template};
#[test]
fn test() {
assert_eq!(leon_macros::template!(""), Template::new(&[], None),);
assert_eq!(
leon_macros::template!("a"),
Template::new(&[Item::Text("a")], None),
);
assert_eq!(
leon_macros::template!("{1}"),
Template::new(&[Item::Key("1")], None),
);
assert_eq!(
leon_macros::template!("a{ 1 } c"),
Template::new(&[Item::Text("a"), Item::Key("1"), Item::Text(" c")], None),
);
}

1
crates/leon/Cargo.toml
View file

@ -8,6 +8,7 @@ rust-version = "1.61.0"
authors = ["Félix Saparelli <felix@passcod.name>"]
edition = "2021"
license = "Apache-2.0 OR MIT"
exclude = ["fuzz"]
[dependencies]
clap = { version = "4.2.2", features = ["derive"], optional = true }

86
crates/leon/src/error.rs
View file

@ -1,11 +1,13 @@
#[derive(Debug, thiserror::Error)]
use thiserror::Error as ThisError;
#[derive(Debug, ThisError)]
#[cfg_attr(feature = "miette", derive(miette::Diagnostic))]
pub enum RenderError {
/// A key was missing from the provided values.
#[error("missing key `{0}`")]
MissingKey(String),
/// An I/O error passed through from [`Template::render_into`].
/// An I/O error passed through from [`Template::render_into`](crate::Template::render_into).
#[error("write failed: {0}")]
Io(#[from] std::io::Error),
}
@ -15,71 +17,73 @@ pub enum RenderError {
/// When the `miette` feature is enabled, this is a rich miette-powered error
/// which will highlight the source of the error in the template when output
/// (with miette's `fancy` feature). With `miette` disabled, this is opaque.
#[derive(Clone, Debug, thiserror::Error, PartialEq, Eq)]
#[derive(Clone, Debug, ThisError, PartialEq, Eq)]
#[cfg_attr(feature = "miette", derive(miette::Diagnostic))]
#[cfg_attr(feature = "miette", diagnostic(transparent))]
#[error(transparent)]
pub struct ParseError(Box<InnerParseError>);
/// The inner (unboxed) type of [`ParseError`].
#[derive(Clone, Debug, thiserror::Error, PartialEq, Eq)]
#[cfg_attr(feature = "miette", derive(miette::Diagnostic))]
#[error("template parse failed")]
#[derive(Clone, Debug, ThisError, PartialEq, Eq)]
#[error("{kind} at span start = {offset}, len = {len}: {src}")]
struct InnerParseError {
#[cfg_attr(feature = "miette", source_code)]
src: String,
offset: usize,
len: usize,
kind: ErrorKind,
}
#[cfg_attr(feature = "miette", label("This bracket is not opening or closing anything. Try removing it, or escaping it with a backslash."))]
unbalanced: Option<(usize, usize)>,
#[cfg(feature = "miette")]
impl miette::Diagnostic for InnerParseError {
fn source_code(&self) -> Option<&dyn miette::SourceCode> {
Some(&self.src)
}
#[cfg_attr(feature = "miette", label("This escape is malformed."))]
escape: Option<(usize, usize)>,
fn labels(&self) -> Option<Box<dyn Iterator<Item = miette::LabeledSpan> + '_>> {
Some(Box::new(std::iter::once_with(|| {
miette::LabeledSpan::new(Some(self.kind.to_string()), self.offset, self.len)
})))
}
}
#[cfg_attr(feature = "miette", label("A key cannot be empty."))]
key_empty: Option<(usize, usize)>,
#[derive(Clone, Debug, ThisError, PartialEq, Eq)]
enum ErrorKind {
#[error("This bracket is not opening or closing anything. Try removing it, or escaping it with a backslash.")]
Unbalanced,
#[cfg_attr(feature = "miette", label("Escapes are not allowed in keys."))]
key_escape: Option<(usize, usize)>,
#[error("This escape is malformed.")]
Escape,
#[error("A key cannot be empty.")]
KeyEmpty,
#[error("Escapes are not allowed in keys.")]
KeyEscape,
}
impl ParseError {
pub(crate) fn unbalanced(src: &str, start: usize, end: usize) -> Self {
fn new(src: &str, start: usize, end: usize, kind: ErrorKind) -> Self {
Self(Box::new(InnerParseError {
src: String::from(src),
unbalanced: Some((start, end.saturating_sub(start) + 1)),
escape: None,
key_empty: None,
key_escape: None,
offset: start,
len: end.saturating_sub(start) + 1,
kind,
}))
}
pub(crate) fn unbalanced(src: &str, start: usize, end: usize) -> Self {
Self::new(src, start, end, ErrorKind::Unbalanced)
}
pub(crate) fn escape(src: &str, start: usize, end: usize) -> Self {
Self(Box::new(InnerParseError {
src: String::from(src),
unbalanced: None,
escape: Some((start, end.saturating_sub(start) + 1)),
key_empty: None,
key_escape: None,
}))
Self::new(src, start, end, ErrorKind::Escape)
}
pub(crate) fn key_empty(src: &str, start: usize, end: usize) -> Self {
Self(Box::new(InnerParseError {
src: String::from(src),
unbalanced: None,
escape: None,
key_empty: Some((start, end.saturating_sub(start) + 1)),
key_escape: None,
}))
Self::new(src, start, end, ErrorKind::KeyEmpty)
}
pub(crate) fn key_escape(src: &str, start: usize, end: usize) -> Self {
Self(Box::new(InnerParseError {
src: String::from(src),
unbalanced: None,
escape: None,
key_empty: None,
key_escape: Some((start, end.saturating_sub(start) + 1)),
}))
Self::new(src, start, end, ErrorKind::KeyEscape)
}
}

13
crates/leon/src/lib.rs
View file

@ -121,12 +121,21 @@
//! assert_eq!(template.render(&values).unwrap().as_str(), "hello pontifex");
//! ```
//!
//! # Compile-time parsing
//!
//! You can either use [`leon-macros`](https://docs.rs/leon-macros)'s
//! [`template!`](https://docs.rs/leon-macros/latest/leon_macros/macro.template.html),
//! a proc-macro, with the exact same syntax as the normal parser, or this
//! crate's [`template!`] rules-macro, which requires a slightly different
//! syntax but doesn't bring in additional dependencies. In either case,
//! the leon library is required as a runtime dependency.
//!
//! # Errors
//!
//! Leon will return a [`LeonError::InvalidTemplate`] if the template fails to
//! Leon will return a [`ParseError`] if the template fails to
//! parse. This can happen if there are unbalanced braces, or if a key is empty.
//!
//! Leon will return a [`LeonError::MissingKey`] if a key is missing from keyed
//! Leon will return a [`RenderError::MissingKey`] if a key is missing from keyed
//! values passed to [`Template::render()`], unless a default value is provided
//! with [`Template.default`].
//!

2
crates/leon/src/macros.rs
View file

@ -29,7 +29,7 @@ macro_rules! __template_impl {
}
/// Construct a template constant using syntax similar to the template to be
/// passed to [`Template::parse`].
/// passed to [`Template::parse`](crate::Template::parse).
///
/// This is essentially a shorthand for:
///

2
crates/leon/src/template.rs
View file

@ -47,7 +47,7 @@ impl<'s> Template<'s> {
/// assert_eq!(TEMPLATE.render(&[("unrelated", "value")]).unwrap(), "Hello world");
/// ```
///
/// For an even more ergonomic syntax, see the [`leon::template!`] macro.
/// For an even more ergonomic syntax, see the [`leon::template!`](crate::template!) macro.
pub const fn new(items: &'s [Item<'s>], default: Option<&'s str>) -> Template<'s> {
Template {
items: Cow::Borrowed(items),