Add no_std support

.github/workflows/check.yml

@@ -83,7 +83,23 @@ jobs:
       - name: Build on nightly
         run: |
           cargo build --release
-          cargo +nightly clippy --all  --all-features -- -D warnings
+          cargo +nightly clippy --all  --all-features -- -D warnings -A clippy::literal_string_with_formatting_args
+
+  build_no_std:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          components: clippy, rustfmt
+          target: x86_64-unknown-none
+      - name: Build
+        run: cd example_no_std && cargo rustc --target x86_64-unknown-none -- -D warnings
 
   test:
     strategy:

Cargo.toml

@@ -1,47 +1,14 @@
-[package]
-name = "shadow-rs"
-version = "0.37.0"
-authors = ["baoyachi <[email protected]>"]
-edition = "2021"
-description = "A build-time information stored in your rust project"
-keywords = ["cargo", "build-script", "build", "shadow", "compile"]
-readme = "README.md"
-categories = ["development-tools", "development-tools::build-utils"]
-repository = "https://github.com/baoyachi/shadow-rs"
-documentation = "https://docs.rs/shadow-rs"
-homepage = "https://github.com/baoyachi/shadow-rs"
-license = "MIT AND Apache-2.0"
-exclude = ["shadow-rs.png", "build_module.png"]
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[package.metadata.docs.rs]
-all-features = true
-
-[dependencies]
-is_debug = "1.0.2"
-const_format = { version = "0.2.22", default-features = false }
-time = { version = "0.3.36", features = ["formatting", "local-offset", "parsing"], default-features = false }
-
-
-#! Optional Dependencies:
-
-## Use `libgit2` as a backend for git operations
-git2 = { version = "0.19.0", default-features = false, optional = true }
-
-## Better support for querying the local system time
-tzdb = { version = "0.6.0", optional = true, default-features = false, features = ["local"] }
-
-document-features = { version = "0.2", optional = true }
-
-cargo_metadata = { version = "0.18.1", optional = true, default-features = false }
-serde_json = { version = "1", default-features = false, optional = true }
-
-[features]
-default = ["git2", "tzdb"]
-metadata = ["cargo_metadata", "serde_json"]
-
-[dev-dependencies]
-winnow = "0.6"
-
 [workspace]
-members = ["example_shadow", "example_shadow_hook", "example_wasm"]
+members = [
+    "shadow-rs",
+    "shadow-rs-consumer",
+    "example_shadow",
+    "example_shadow_hook",
+    "example_wasm",
+]
+
+exclude = [
+    "example_no_std"
+]
+
+resolver = "2"

README.md

@@ -140,6 +140,37 @@ fn main() {
 }
 ```
 
+## Setup for `no_std`
+Add this to your Cargo.toml
+```toml
+[dependencies]
+shadow-rs-consumer = "{latest version}"
+
+[build-dependencies]
+shadow-rs = { version = "{latest version}", default-features = false }
+```
+
+Add this line to your `build.rs`:
+```rust
+fn main() {
+  ShadowBuilder::builder().build().unwrap();
+}
+```
+
+In your project code, add this:
+
+```rust
+use shadow_rs_consumer::shadow;
+
+shadow!(build);
+```
+
+Make use of your build constants:
+```rust
+log::info!("{}", build::SHORT_COMMIT); //8405e28e
+```
+
+
 #### Reproducibility
 
 This tool includes the current time in the binary which would normally make it non-reproducible.

example_no_std/.gitignore

@@ -0,0 +1,12 @@
+# Generated by Cargo
+# will have compiled files and executables
+/target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+.idea
+shadow.rs

example_no_std/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "example_no_std"
+version = "0.1.8"
+authors = ["baoyachi <[email protected]>", "mchodzikiewicz <[email protected]>"]
+edition = "2021"
+build = "build.rs"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+shadow-rs-consumer = { path = "../shadow-rs-consumer" }
+log = "0.4.22"
+
+[build-dependencies]
+shadow-rs = { path = "../shadow-rs", default-features = false }

example_no_std/build.rs

@@ -0,0 +1,8 @@
+use shadow_rs::ShadowBuilder;
+
+fn main() {
+    ShadowBuilder::builder()
+        .deny_const(Default::default())
+        .build()
+        .unwrap();
+}

example_no_std/src/main.rs

@@ -0,0 +1,18 @@
+#![no_std]
+#![no_main]
+
+use shadow_rs_consumer::shadow;
+
+shadow!(build);
+
+use core::panic::PanicInfo;
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}
+
+#[allow(clippy::all, clippy::pedantic, clippy::restriction, clippy::nursery)]
+pub fn func() {
+    log::info!("short_commit: {}", build::SHORT_COMMIT);
+}

example_shadow/Cargo.toml

@@ -9,10 +9,10 @@ build = "build.rs"
 
 [dependencies]
 clap = "4.0.1"
-shadow-rs = { path = "../",features = ["metadata"] }
+shadow-rs = { path = "../shadow-rs",features = ["metadata"] }
 
 [build-dependencies]
-shadow-rs = { path = "../" }
+shadow-rs = { path = "../shadow-rs" }
 
 # Test cargo-clippy. For more detailed information about the issue, visit: https://github.com/baoyachi/shadow-rs/issues/151
 [lints.clippy]

example_shadow_hook/Cargo.toml

@@ -8,7 +8,7 @@ build = "build.rs"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-shadow-rs = { path = "../" }
+shadow-rs = { path = "../shadow-rs" }
 
 [build-dependencies]
-shadow-rs = { path = "../" }
+shadow-rs = { path = "../shadow-rs" }

example_wasm/Cargo.toml

@@ -10,7 +10,7 @@ crate-type = ["cdylib", "rlib"]
 
 
 [dependencies]
-shadow-rs = { path = "../", default-features = false, features = ["tzdb"] }
+shadow-rs = { path = "../shadow-rs", default-features = false, features = ["tzdb"] }
 
 
 [package.metadata.wasm-pack.profile.release]

shadow-rs-consumer/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "shadow-rs-consumer"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+const_format = "0.2.34"

shadow-rs-consumer/src/lib.rs

@@ -0,0 +1,27 @@
+#![no_std]
+/// Add a module with the provided name which contains the build information generated by `shadow-rs`.
+///
+/// # Example
+///
+/// ```ignore
+/// use shadow_rs::shadow;
+///
+/// shadow!(my_build_information);
+///
+/// fn main() {
+///     println!("I'm version {}!", my_build_information::VERSION);
+/// }
+/// ```
+///
+/// The convention, however, is to use `shadow!(build);`.
+#[macro_export]
+macro_rules! shadow {
+    ($build_mod:ident) => {
+        #[doc = r#"shadow-rs mod"#]
+        pub mod $build_mod {
+            include!(concat!(env!("OUT_DIR"), "/shadow.rs"));
+        }
+    };
+}
+
+pub use const_format::formatcp;

shadow-rs/Cargo.toml

@@ -0,0 +1,46 @@
+[package]
+name = "shadow-rs"
+version = "0.37.0"
+authors = ["baoyachi <[email protected]>"]
+edition = "2021"
+description = "A build-time information stored in your rust project"
+keywords = ["cargo", "build-script", "build", "shadow", "compile"]
+readme = "README.md"
+categories = ["development-tools", "development-tools::build-utils"]
+repository = "https://github.com/baoyachi/shadow-rs"
+documentation = "https://docs.rs/shadow-rs"
+homepage = "https://github.com/baoyachi/shadow-rs"
+license = "MIT AND Apache-2.0"
+exclude = ["shadow-rs.png", "build_module.png"]
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[package.metadata.docs.rs]
+all-features = true
+
+[dependencies]
+is_debug = "1.0.2"
+const_format = { version = "0.2.22", default-features = false }
+time = { version = "0.3.36", features = ["formatting", "local-offset", "parsing"], default-features = false }
+#TODO: not sure how to bootstrap this, but once shadow-rs-consumer is published on crates.io, this dep should point to that version
+shadow-rs-consumer = { path = "../shadow-rs-consumer"}
+
+#! Optional Dependencies:
+
+## Use `libgit2` as a backend for git operations
+git2 = { version = "0.19.0", default-features = false, optional = true }
+
+## Better support for querying the local system time
+tzdb = { version = "0.6.0", optional = true, default-features = false, features = ["local"] }
+
+document-features = { version = "0.2", optional = true }
+
+cargo_metadata = { version = "0.18.1", optional = true, default-features = false }
+serde_json = { version = "1", default-features = false, optional = true }
+
+[features]
+default = ["std", "git2", "tzdb"]
+metadata = ["cargo_metadata", "serde_json"]
+std = []
+
+[dev-dependencies]
+winnow = "0.6"

src/gen_const.rs → shadow-rs/src/gen_const.rs

@@ -1,7 +1,9 @@
+#[cfg(feature = "std")]
 use crate::{Shadow, CARGO_CLIPPY_ALLOW_ALL, CARGO_METADATA};
 
 macro_rules! gen_const {
     ($fn_name:ident, $fn_body:expr) => {
+        #[allow(unused)]
         pub fn $fn_name() -> String {
             let (doc, content) = $fn_body;
             format!(
@@ -15,11 +17,12 @@ macro_rules! gen_const {
     };
 }
 
+#[allow(dead_code)]
 const VERSION_BRANCH_CONST: (&str, &str) = (
     r#"/// A long version string describing the project.
 /// The version string contains the package version, branch, commit hash, build time, and build environment on separate lines.
 /// This constant is suitable for printing to the user."#,
-    r##"pub const VERSION:&str = shadow_rs::formatcp!(r#"
+    r##"pub const VERSION:&str = shadow_rs_consumer::formatcp!(r#"
 pkg_version:{}
 branch:{}
 commit_hash:{}
@@ -28,11 +31,12 @@ build_env:{},{}"#,PKG_VERSION, BRANCH, SHORT_COMMIT, BUILD_TIME, RUST_VERSION, R
 );"##,
 );
 
+#[allow(dead_code)]
 const VERSION_TAG_CONST: (&str, &str) = (
     r#"/// A long version string describing the project.
 /// The version string contains the package version, current Git tag, commit hash, build time, and build environment on separate lines.
 /// This constant is suitable for printing to the user."#,
-    r##"pub const VERSION:&str = shadow_rs::formatcp!(r#"
+    r##"pub const VERSION:&str = shadow_rs_consumer::formatcp!(r#"
 pkg_version:{}
 tag:{}
 commit_hash:{}
@@ -41,43 +45,47 @@ build_env:{},{}"#,PKG_VERSION, TAG, SHORT_COMMIT, BUILD_TIME, RUST_VERSION, RUST
 );"##,
 );
 
+#[allow(dead_code)]
 const CLAP_VERSION_BRANCH_CONST: (&str, &str) = (
     r#"#[deprecated = "Replaced with `CLAP_LONG_VERSION`"]"#,
-    r##"pub const CLAP_VERSION:&str = shadow_rs::formatcp!(r#"{}
+    r##"pub const CLAP_VERSION:&str = shadow_rs_consumer::formatcp!(r#"{}
 branch:{}
 commit_hash:{}
 build_time:{}
 build_env:{},{}"#,PKG_VERSION, BRANCH, SHORT_COMMIT, BUILD_TIME, RUST_VERSION, RUST_CHANNEL
 );"##,
 );
 
+#[allow(dead_code)]
 const CLAP_VERSION_TAG_CONST: (&str, &str) = (
     r#"#[deprecated = "Replaced with `CLAP_LONG_VERSION`"]"#,
-    r##"pub const CLAP_VERSION:&str = shadow_rs::formatcp!(r#"{}
+    r##"pub const CLAP_VERSION:&str = shadow_rs_consumer::formatcp!(r#"{}
 tag:{}
 commit_hash:{}
 build_time:{}
 build_env:{},{}"#,PKG_VERSION, TAG, SHORT_COMMIT, BUILD_TIME, RUST_VERSION, RUST_CHANNEL
 );"##,
 );
 
+#[allow(dead_code)]
 const CLAP_LONG_VERSION_BRANCH_CONST: (&str, &str) = (
     r#"/// A long version string describing the project.
 /// The version string contains the package version, branch, commit hash, build time, and build environment on separate lines.
 /// This constant is intended to be used by clap or other CLI tools as a long version string."#,
-    r##"pub const CLAP_LONG_VERSION:&str = shadow_rs::formatcp!(r#"{}
+    r##"pub const CLAP_LONG_VERSION:&str = shadow_rs_consumer::formatcp!(r#"{}
 branch:{}
 commit_hash:{}
 build_time:{}
 build_env:{},{}"#,PKG_VERSION, BRANCH, SHORT_COMMIT, BUILD_TIME, RUST_VERSION, RUST_CHANNEL
 );"##,
 );
 
+#[allow(dead_code)]
 const CLAP_LONG_VERSION_TAG_CONST: (&str, &str) = (
     r#"/// A long version string describing the project.
 /// The version string contains the package version, current Git tag, commit hash, build time, and build environment on separate lines.
 /// This constant is intended to be used by clap or other CLI tools as a long version string."#,
-    r##"pub const CLAP_LONG_VERSION:&str = shadow_rs::formatcp!(r#"{}
+    r##"pub const CLAP_LONG_VERSION:&str = shadow_rs_consumer::formatcp!(r#"{}
 tag:{}
 commit_hash:{}
 build_time:{}
@@ -95,9 +103,12 @@ gen_const!(
 );
 gen_const!(clap_long_version_tag_const, CLAP_LONG_VERSION_TAG_CONST);
 
+#[allow(dead_code)]
 pub(crate) const BUILD_CONST_VERSION: &str = "VERSION";
+#[allow(dead_code)]
 pub(crate) const BUILD_CONST_CLAP_LONG_VERSION: &str = "CLAP_LONG_VERSION";
 
+#[cfg(feature = "std")]
 pub(crate) fn cargo_metadata_fn(shadow: &Shadow) -> String {
     if !shadow.map.contains_key(CARGO_METADATA) {
         return "".to_string();