rllvm 0.1.6

A tool to build whole-program LLVM bitcode files
Documentation 
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//! Clang compiler wrapper

use std::path::{Path, PathBuf};

use crate::{
    arg_parser::CompilerArgsInfo, compiler_wrapper::*, config::rllvm_config, error::Error,
};

#[derive(Debug)]
pub struct ClangWrapper {
    name: String,
    wrapped_compiler: PathBuf,
    compiler_kind: CompilerKind,
    is_silent: bool,

    is_parse_args_called: bool,

    args: CompilerArgsInfo,
}

impl ClangWrapper {
    pub fn new(name: &str, compiler_kind: CompilerKind) -> Self {
        // Obtain the compiler path from the configuration
        let compiler_path = match compiler_kind {
            CompilerKind::Clang => rllvm_config().clang_filepath(),
            CompilerKind::ClangXX => rllvm_config().clangxx_filepath(),
        };

        Self {
            name: name.to_string(),
            wrapped_compiler: compiler_path.clone(),
            compiler_kind,
            is_silent: false,
            is_parse_args_called: false,
            args: CompilerArgsInfo::default(),
        }
    }
}

impl CompilerWrapper for ClangWrapper {
    fn name(&self) -> &str {
        &self.name
    }

    fn wrapped_compiler(&self) -> &Path {
        &self.wrapped_compiler
    }

    fn compiler_kind(&self) -> &CompilerKind {
        &self.compiler_kind
    }

    fn parse_args<S>(&mut self, args: &[S]) -> Result<&'_ mut Self, Error>
    where
        S: AsRef<str>,
    {
        // Empty argument list is not allowed
        if args.is_empty() {
            return Err(Error::InvalidArguments(
                "The give argument list cannot be empty".to_string(),
            ));
        }

        if self.is_parse_args_called {
            return Err(Error::Unknown(
                "parse_args() cannot be called twice on the same instance".to_string(),
            ));
        }
        self.is_parse_args_called = true;

        self.args.parse_args(args)?;

        Ok(self)
    }

    fn args(&self) -> &CompilerArgsInfo {
        &self.args
    }

    fn silence(&mut self, value: bool) -> &'_ mut Self {
        self.is_silent = value;
        self
    }

    fn is_silent(&self) -> bool {
        self.is_silent
    }
}

/// Builder for the [`ClangWrapper`]
#[derive(Debug)]
pub struct ClangWrapperBuilder {
    /// Name of the wrapper
    name: String,
    /// Path to the wrapped compiler (optional)
    wrapped_compiler: Option<PathBuf>,
    /// Compiler kind
    compiler_kind: CompilerKind,
    /// Silence the compiler wrapper output (optional)
    is_silent: Option<bool>,
}

impl ClangWrapperBuilder {
    pub fn new() -> Self {
        Self {
            name: String::new(),
            wrapped_compiler: None,
            compiler_kind: CompilerKind::Clang,
            is_silent: None,
        }
    }
}

impl CompilerWrapperBuilder for ClangWrapperBuilder {
    type OutputType = ClangWrapper;

    fn build(&self) -> Self::OutputType {
        // Obtain the compiler path from the configuration, if not provided
        let compiler_path = self
            .wrapped_compiler
            .as_ref()
            .unwrap_or(match self.compiler_kind {
                CompilerKind::Clang => rllvm_config().clang_filepath(),
                CompilerKind::ClangXX => rllvm_config().clangxx_filepath(),
            });

        ClangWrapper {
            name: self.name.clone(),
            wrapped_compiler: compiler_path.clone(),
            compiler_kind: self.compiler_kind,
            is_silent: self.is_silent.unwrap_or(false),
            is_parse_args_called: false,
            args: CompilerArgsInfo::default(),
        }
    }

    fn name(mut self, name: &str) -> Self {
        self.name = name.to_string();
        self
    }

    fn compiler_kind(mut self, compiler_kind: CompilerKind) -> Self {
        self.compiler_kind = compiler_kind;
        self
    }

    fn wrapped_compiler<P>(mut self, wrapped_compiler: P) -> Self
    where
        P: AsRef<Path>,
    {
        self.wrapped_compiler = Some(wrapped_compiler.as_ref().to_path_buf());
        self
    }

    fn silence(mut self, value: bool) -> Self {
        self.is_silent = Some(value);
        self
    }
}