From 5a6376b47da83c1c1292fc6a2610bb66105e04a0 Mon Sep 17 00:00:00 2001
From: Marek Kaput <marek.kaput@swmansion.com>
Date: Thu, 20 Apr 2023 11:31:03 +0200
Subject: [PATCH] =?UTF-8?q?Initial=20commit=20=F0=9F=9A=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore  |    1 +
 Cargo.lock  | 1188 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |   21 +
 LICENSE     |   21 +
 README.md   |   40 ++
 src/main.rs |  109 +++++
 6 files changed, 1380 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 LICENSE
 create mode 100644 README.md
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
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index 0000000..ea8c4bf
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diff --git a/Cargo.lock b/Cargo.lock
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+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
+[[package]]
+name = "winnow"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae8970b36c66498d8ff1d66685dc86b91b29db0c7739899012f63a63814b4b28"
+dependencies = [
+ "memchr",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..595c49d
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,21 @@
+[package]
+name = "scarb-eject"
+version = "1.0.0"
+edition = "2021"
+rust-version = "1.68"
+
+authors = ["Software Mansion <contact@swmansion.com>"]
+description = "Create cairo_project.toml for a given Scarb package."
+license = "MIT"
+readme = "README.md"
+repository = "https://github.com/software-mansion-labs/scarb-eject"
+
+[dependencies]
+anyhow = "1.0.70"
+cairo-lang-project = "1.0.0-alpha.7"
+clap = { version = "4.2.4", features = ["derive"] }
+scarb-metadata = "1.1.0"
+toml = "0.7.3"
+
+[profile.release]
+lto = true
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9e6a77d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2023 Software Mansion <swmansion.com>
+
+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.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..978f635
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+# scarb-eject
+
+Create `cairo_project.toml` for a given [Scarb] package.
+
+## ⚠️ Caveats
+
+1. **This tool is just a temporary hack, use with caution!**
+2. **Scarb team does not serve support for it, use at your own risk!**
+3. Scarb philosophy is to avoid necessity for `cairo_project.toml` usage in project, because it is a very low-level
+   concept that is hard to reason about. If you find a necessity to use this tool, this means that either:
+    1. Scarb does not have Cairo tool packaged as Scarb extension **yet** ﹣ this is the valid use case for this project,
+    2. Or you do something fundamentally wrong, and you should revise your workflows. Probably you want to
+       use [`scarb_metadata`](https://crates.io/crates/scarb-metadata).
+
+## Installation
+
+You need latest Scarb and stable Rust installed.
+
+```shell
+cargo install --git https://github.com/software-mansion-labs/scarb-eject
+```
+
+## Usage
+
+Simply running `scarb eject` in your Scarb workspace directory will work for most cases.
+
+```shell
+$ scarb eject --help
+Create cairo_project.toml for a given Scarb package.
+
+Usage: scarb-eject [OPTIONS]
+
+Options:
+  -o, --output <PATH>   Path to `cairo_project.toml` file to overwrite. Defaults to next to `Scarb.toml` for this workspace. Use `-` to write to standard output
+  -p, --package <SPEC>  Specify package to eject
+  -h, --help            Print help
+  -V, --version         Print version
+```
+
+[scarb]: https://docs.swmansion.com/scarb/
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..d9be0ad
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,109 @@
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use anyhow::{anyhow, bail, Result};
+use cairo_lang_project::ProjectConfigContent;
+use clap::Parser;
+use scarb_metadata::{Metadata, PackageId};
+
+#[derive(Parser, Clone, Debug)]
+#[command(about, author, version)]
+struct Args {
+    /// Path to `cairo_project.toml` file to overwrite.
+    /// Defaults to next to `Scarb.toml` for this workspace.
+    /// Use `-` to write to standard output.
+    #[arg(short, long, value_name = "PATH")]
+    output: Option<PathBuf>,
+
+    #[command(flatten)]
+    packages_filter: PackagesFilter,
+}
+
+#[derive(Parser, Clone, Debug)]
+struct PackagesFilter {
+    /// Specify package to eject.
+    #[arg(short, long, value_name = "SPEC")]
+    package: Option<String>,
+}
+
+impl PackagesFilter {
+    fn match_one(&self, metadata: &Metadata) -> Result<PackageId> {
+        match &self.package {
+            Some(name) => {
+                let package = metadata
+                    .packages
+                    .iter()
+                    .find(|pkg| pkg.name == *name)
+                    .ok_or_else(|| anyhow!("package `{name}` not found in workspace"))?;
+
+                if !metadata.workspace.members.contains(&package.id) {
+                    bail!("package `{name}` is not a member of this workspace");
+                }
+
+                Ok(package.id.clone())
+            }
+            None => {
+                let members = &metadata.workspace.members;
+                match members.len() {
+                    0 => bail!("workspace has no members"),
+                    1 => Ok(members[0].clone()),
+                    _ => bail!("workspace has multiple members, please specify package"),
+                }
+            }
+        }
+    }
+}
+
+fn main() -> Result<()> {
+    let args: Args = Args::parse();
+
+    let metadata = scarb_metadata::MetadataCommand::new()
+        .inherit_stderr()
+        .exec()?;
+
+    let main_package_id = args.packages_filter.match_one(&metadata)?;
+
+    let compilation_unit = metadata
+        .compilation_units
+        .iter()
+        .filter(|unit| unit.package == main_package_id)
+        .min_by_key(|unit| match unit.target.name.as_str() {
+            name @ "starknet-contract" => (0, name),
+            name @ "lib" => (1, name),
+            name => (2, name),
+        })
+        .ok_or_else(|| {
+            anyhow!(
+                "could not find a compilation unit suitable for ejection for \
+                package {main_package_id}"
+            )
+        })?;
+
+    let crate_roots = compilation_unit
+        .components
+        .iter()
+        .filter(|c| c.name != "core")
+        .map(|c| (c.name.clone().into(), c.source_root().into()))
+        .collect();
+
+    let project_config = ProjectConfigContent { crate_roots };
+
+    let mut cairo_project_toml = toml::to_string_pretty(&project_config)?;
+    cairo_project_toml.push('\n');
+
+    let output = args.output.unwrap_or_else(|| {
+        metadata
+            .workspace
+            .root
+            .clone()
+            .into_std_path_buf()
+            .join("cairo_project.toml")
+    });
+    if output == Path::new("-") {
+        println!("{cairo_project_toml}");
+    } else {
+        fs::write(output, cairo_project_toml)?;
+    }
+
+    Ok(())
+}