Use cargo_metadata in guess_target and remove dependency on toml

Cargo.toml

@@ -30,15 +30,13 @@ log = { version = "0.4.21", optional = true }
 semver = { version = "1.0.23", optional = true }
 strip-ansi-escapes = { version = "0.2.0", optional = true }
 time-humanize = { version = "0.1.3", optional = true }
-toml = { version = "0.8.12", optional = true }
 
 [features]
 default = ["cli"]
 cli = [
  "clap",
  "console",
  "glob",
- "toml",
  "semver",
  "anyhow",
  "log",

src/bin/cargo-ziggy/main.rs

@@ -330,39 +330,13 @@ pub fn find_target(target: &String) -> Result<String, anyhow::Error> {
 }
 
 fn guess_target() -> Result<String> {
- // TODO Use cargo-metadata and remove toml dependency
-
- let cargo_toml_string = fs::read_to_string("Cargo.toml")
- .context("⚠️ couldn't find Cargo.toml in this folder, cannot guess target")?;
- let cargo_toml = cargo_toml_string.parse::<toml::Value>().context(
- "⚠️ couldn't parse the Cargo.toml file in this folder, thus cannot guess the target",
- )?;
-
- if let Some(bin_section) = cargo_toml.get("bin") {
- let bin_array = bin_section
- .as_array()
- .ok_or_else(|| anyhow!("Bin section should be an array in Cargo.toml"))?;
- // If one of the bin targets uses main, we use this target
- for bin_target in bin_array {
- if bin_target["path"]
- .as_str()
- .context("Path should be a string in Cargo.toml")?
- == "src/main.rs"
- {
- return Ok(bin_target["name"]
- .as_str()
- .ok_or_else(|| anyhow!("Bin name should be a string in Cargo.toml"))?
- .to_string());
- }
+ let metadata = cargo_metadata::MetadataCommand::new().exec()?;
+ let default_package = metadata.workspace_default_members;
+ if let Some(package_id) = default_package.first() {
+ if let Some(package) = metadata.packages.iter().find(|p| p.id == *package_id) {
+ return Ok(package.name.clone());
  }
  }
- // src/main.rs exists, and either the bin array was empty, or it did not specify the main.rs bin target,
- // so we use the name of the project as target.
- if std::path::Path::new("src/main.rs").exists() {
- return Ok(cargo_toml["package"]["name"]
- .as_str()
- .ok_or_else(|| anyhow!("Package name should be a string in Cargo.toml"))?
- .to_string());
- }
+
  Err(anyhow!("Please specify a target"))
 }