🚩 add flag to only install riscv if user wants

CHANGELOG.md

@@ -8,10 +8,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+- Added new `--esp-riscv-gcc` flag to install esp-riscv-gcc toolchain instead of the system one (#391)
 
 ### Fixed
 
 ### Changed
+- New Default behavior: install esp-riscv-gcc only if the user explicitly uses the `--esp-riscv-gcc` flag (#391)
 
 ### Removed
 

README.md

@@ -138,6 +138,11 @@ Options:
 
           [possible values: x86_64-unknown-linux-gnu, aarch64-unknown-linux-gnu, x86_64-pc-windows-msvc, x86_64-pc-windows-gnu, x86_64-apple-darwin, aarch64-apple-darwin]
 
+-r, --esp-riscv-gcc
+          Install Espressif RISC-V toolchain built with croostool-ng
+
+          Only install this if you don't want to use the systems RISC-V toolchain
+
   -f, --export-file <EXPORT_FILE>
           Relative or full path for the export file that will be generated. If no path is provided, the file will be generated under home directory (https://docs.rs/dirs/latest/dirs/fn.home_dir.html)
 

src/cli.rs

@@ -19,6 +19,11 @@ pub struct InstallOpts {
     /// Target triple of the host.
     #[arg(short = 'd', long, value_parser = ["x86_64-unknown-linux-gnu", "aarch64-unknown-linux-gnu", "x86_64-pc-windows-msvc", "x86_64-pc-windows-gnu" , "x86_64-apple-darwin" , "aarch64-apple-darwin"])]
     pub default_host: Option<String>,
+    /// Install Espressif RISC-V toolchain built with croostool-ng
+    ///
+    /// Only install this if you don't want to use the systems RISC-V toolchain
+    #[arg(short = 'r', long)]
+    pub esp_riscv_gcc: bool,
     /// Relative or full path for the export file that will be generated. If no path is provided, the file will be generated under home directory (https://docs.rs/dirs/latest/dirs/fn.home_dir.html).
     #[arg(short = 'f', long)]
     pub export_file: Option<PathBuf>,

src/toolchain/mod.rs

@@ -215,9 +215,9 @@ pub async fn install(args: InstallOpts, install_mode: InstallMode) -> Result<()>
             let xtensa_gcc = Gcc::new(XTENSA_GCC, &host_triple, &toolchain_dir);
             to_install.push(Box::new(xtensa_gcc));
         }
-        // All RISC-V targets use the same GCC toolchain
-        // ESP32S2 and ESP32S3 also install the RISC-V toolchain for their ULP coprocessor
-        if targets.iter().any(|t| t != &Target::ESP32) {
+
+        // By default only install the Espressif RISC-V toolchain if the user explicitly wants to
+        if args.esp_riscv_gcc && targets.iter().any(|t| t != &Target::ESP32) {
             let riscv_gcc = Gcc::new(RISCV_GCC, &host_triple, &toolchain_dir);
             to_install.push(Box::new(riscv_gcc));
         }