fn parse_crate_type(
    crate_type: &str,
    cmd: &ProcessBuilder,
    output: &str,
    error: &str,
    lines: &mut str::Lines<'_>,
) -> CargoResult<Option<(String, String)>> {
    let not_supported = error.lines().any(|line| {
        (line.contains("unsupported crate type") || line.contains("unknown crate type"))
            && line.contains(&format!("crate type `{}`", crate_type))
    });
    if not_supported {
        return Ok(None);
    }
    let line = match lines.next() {
        Some(line) => line,
        None => anyhow::bail!(
            "malformed output when learning about crate-type {} information\n{}",
            crate_type,
            output_err_info(cmd, output, error)
        ),
    };
    let mut parts = line.trim().split("___");
    let prefix = parts.next().unwrap();
    let suffix = match parts.next() {
        Some(part) => part,
        None => anyhow::bail!(
            "output of --print=file-names has changed in the compiler, cannot parse\n{}",
            output_err_info(cmd, output, error)
        ),
    };

    Ok(Some((prefix.to_string(), suffix.to_string())))
}
/// Takes rustc output (using specialized command line args), and calculates the file prefix and
/// suffix for the given crate type, or returns `None` if the type is not supported. (e.g., for a
/// Rust library like `libcargo.rlib`, we have prefix "lib" and suffix "rlib").
///
/// The caller needs to ensure that the lines object is at the correct line for the given crate
/// type: this is not checked.
///
/// This function can not handle more than one file per type (with wasm32-unknown-emscripten, there
/// are two files for bin (`.wasm` and `.js`)).
Takes rustc output (using specialized command line args), and calculates the file prefix and
suffix for the given crate type, or returns `None` if the type is not supported.

The caller needs to ensure that the lines object is at the correct line for the given crate
type: this is not checked.

This function can not handle more than one file per type (with wasm32-unknown-emscripten, there
are two files for bin (`.wasm` and `.js`)).
Takes rustc output ( using specialized command line args ) and calculates the file prefix and suffix for the given crate type or returns ` None ` if the type is not supported . The caller needs to ensure that the lines object is at the correct line for the given crate type : this is not checked . This function can not handle more than one file per type ( with wasm32 - unknown - emscripten there are two files for bin ( ` . wasm ` and ` . js ` )) .
fn parse_crate_type(
    crate_type: &str,
    cmd: &ProcessBuilder,
    output: &str,
    error: &str,
    lines: &mut str::Lines<'_>,
) -> CargoResult<Option<(String, String)>> {
    let not_supported = error.lines().any(|line| {
        (line.contains("unsupported crate type") || line.contains("unknown crate type"))
            && line.contains(&format!("crate type `{}`", crate_type))
    });
    if not_supported {
        return Ok(None);
    }
    let line = match lines.next() {
        Some(line) => line,
        None => anyhow::bail!(
            "malformed output when learning about crate-type {} information\n{}",
            crate_type,
            output_err_info(cmd, output, error)
        ),
    };
    let mut parts = line.trim().split("___");
    let prefix = parts.next().unwrap();
    let suffix = match parts.next() {
        Some(part) => part,
        None => anyhow::bail!(
            "output of --print=file-names has changed in the compiler, cannot parse\n{}",
            output_err_info(cmd, output, error)
        ),
    };
    Ok(Some((prefix.to_string(), suffix.to_string())))
}
fn parse_crate_type ( crate_type : & str , cmd : & ProcessBuilder , output : & str , error : & str , lines : & mut str :: Lines < ' _ > , ) -> CargoResult < Option < ( String , String ) > > { let not_supported = error . lines ( ) . any ( | line | { ( line . contains ( " " ) || line . contains ( " " ) ) && line . contains ( & format ! ( " " crate_type ) ) } ) ; if not_supported { return Ok ( None ) ; } let line = match lines . next ( ) { Some ( line ) => line , None => anyhow :: bail ! ( " \n " crate_type output_err_info ( cmd output error ) ) , } ; let mut parts = line . trim ( ) . split ( " " ) ; let prefix = parts . next ( ) . unwrap ( ) ; let suffix = match parts . next ( ) { Some ( part ) => part , None => anyhow :: bail ! ( " \n " output_err_info ( cmd output error ) ) , } ; Ok ( Some ( ( prefix . to_string ( ) , suffix . to_string ( ) ) ) ) }
Takes rustc output (using specialized command line args), and calculates the file prefix and
suffix for the given crate type, or returns `None` if the type is not supported.
Takes rustc output ( using specialized command line args ) and calculates the file prefix and suffix for the given crate type or returns ` None ` if the type is not supported .
crate_type
&str
cmd
&ProcessBuilder
output
&str
error
&str
lines
&mut str::Lines<'_>
crate_type
&str
cmd
&ProcessBuilder
output
&str
error
&str
lines
&mut str::Lines<'_>