| //! Related to out filenames of compilation (e.g. save analysis, binaries). |
| use crate::config::{CrateType, Input, OutputFilenames, OutputType}; |
| use crate::Session; |
| use rustc_ast as ast; |
| use rustc_span::symbol::sym; |
| use rustc_span::Span; |
| use std::path::{Path, PathBuf}; |
| |
| pub fn out_filename( |
| sess: &Session, |
| crate_type: CrateType, |
| outputs: &OutputFilenames, |
| crate_name: &str, |
| ) -> PathBuf { |
| let default_filename = filename_for_input(sess, crate_type, crate_name, outputs); |
| let out_filename = outputs |
| .outputs |
| .get(&OutputType::Exe) |
| .and_then(|s| s.to_owned()) |
| .or_else(|| outputs.single_output_file.clone()) |
| .unwrap_or(default_filename); |
| |
| check_file_is_writeable(&out_filename, sess); |
| |
| out_filename |
| } |
| |
| /// Make sure files are writeable. Mac, FreeBSD, and Windows system linkers |
| /// check this already -- however, the Linux linker will happily overwrite a |
| /// read-only file. We should be consistent. |
| pub fn check_file_is_writeable(file: &Path, sess: &Session) { |
| if !is_writeable(file) { |
| sess.fatal(&format!( |
| "output file {} is not writeable -- check its \ |
| permissions", |
| file.display() |
| )); |
| } |
| } |
| |
| fn is_writeable(p: &Path) -> bool { |
| match p.metadata() { |
| Err(..) => true, |
| Ok(m) => !m.permissions().readonly(), |
| } |
| } |
| |
| pub fn find_crate_name(sess: &Session, attrs: &[ast::Attribute], input: &Input) -> String { |
| let validate = |s: String, span: Option<Span>| { |
| validate_crate_name(sess, &s, span); |
| s |
| }; |
| |
| // Look in attributes 100% of the time to make sure the attribute is marked |
| // as used. After doing this, however, we still prioritize a crate name from |
| // the command line over one found in the #[crate_name] attribute. If we |
| // find both we ensure that they're the same later on as well. |
| let attr_crate_name = |
| sess.find_by_name(attrs, sym::crate_name).and_then(|at| at.value_str().map(|s| (at, s))); |
| |
| if let Some(ref s) = sess.opts.crate_name { |
| if let Some((attr, name)) = attr_crate_name { |
| if name.as_str() != *s { |
| let msg = format!( |
| "`--crate-name` and `#[crate_name]` are \ |
| required to match, but `{}` != `{}`", |
| s, name |
| ); |
| sess.span_err(attr.span, &msg); |
| } |
| } |
| return validate(s.clone(), None); |
| } |
| |
| if let Some((attr, s)) = attr_crate_name { |
| return validate(s.to_string(), Some(attr.span)); |
| } |
| if let Input::File(ref path) = *input { |
| if let Some(s) = path.file_stem().and_then(|s| s.to_str()) { |
| if s.starts_with('-') { |
| let msg = format!( |
| "crate names cannot start with a `-`, but \ |
| `{}` has a leading hyphen", |
| s |
| ); |
| sess.err(&msg); |
| } else { |
| return validate(s.replace("-", "_"), None); |
| } |
| } |
| } |
| |
| "rust_out".to_string() |
| } |
| |
| pub fn validate_crate_name(sess: &Session, s: &str, sp: Option<Span>) { |
| let mut err_count = 0; |
| { |
| let mut say = |s: &str| { |
| match sp { |
| Some(sp) => sess.span_err(sp, s), |
| None => sess.err(s), |
| } |
| err_count += 1; |
| }; |
| if s.is_empty() { |
| say("crate name must not be empty"); |
| } |
| for c in s.chars() { |
| if c.is_alphanumeric() { |
| continue; |
| } |
| if c == '_' { |
| continue; |
| } |
| say(&format!("invalid character `{}` in crate name: `{}`", c, s)); |
| } |
| } |
| |
| if err_count > 0 { |
| sess.abort_if_errors(); |
| } |
| } |
| |
| pub fn filename_for_metadata( |
| sess: &Session, |
| crate_name: &str, |
| outputs: &OutputFilenames, |
| ) -> PathBuf { |
| let libname = format!("{}{}", crate_name, sess.opts.cg.extra_filename); |
| |
| let out_filename = outputs |
| .single_output_file |
| .clone() |
| .unwrap_or_else(|| outputs.out_directory.join(&format!("lib{}.rmeta", libname))); |
| |
| check_file_is_writeable(&out_filename, sess); |
| |
| out_filename |
| } |
| |
| pub fn filename_for_input( |
| sess: &Session, |
| crate_type: CrateType, |
| crate_name: &str, |
| outputs: &OutputFilenames, |
| ) -> PathBuf { |
| let libname = format!("{}{}", crate_name, sess.opts.cg.extra_filename); |
| |
| match crate_type { |
| CrateType::Rlib => outputs.out_directory.join(&format!("lib{}.rlib", libname)), |
| CrateType::Cdylib | CrateType::ProcMacro | CrateType::Dylib => { |
| let (prefix, suffix) = (&sess.target.dll_prefix, &sess.target.dll_suffix); |
| outputs.out_directory.join(&format!("{}{}{}", prefix, libname, suffix)) |
| } |
| CrateType::Staticlib => { |
| let (prefix, suffix) = (&sess.target.staticlib_prefix, &sess.target.staticlib_suffix); |
| outputs.out_directory.join(&format!("{}{}{}", prefix, libname, suffix)) |
| } |
| CrateType::Executable => { |
| let suffix = &sess.target.exe_suffix; |
| let out_filename = outputs.path(OutputType::Exe); |
| if suffix.is_empty() { out_filename } else { out_filename.with_extension(&suffix[1..]) } |
| } |
| } |
| } |
| |
| /// Returns default crate type for target |
| /// |
| /// Default crate type is used when crate type isn't provided neither |
| /// through cmd line arguments nor through crate attributes |
| /// |
| /// It is CrateType::Executable for all platforms but iOS as there is no |
| /// way to run iOS binaries anyway without jailbreaking and |
| /// interaction with Rust code through static library is the only |
| /// option for now |
| pub fn default_output_for_target(sess: &Session) -> CrateType { |
| if !sess.target.executables { CrateType::Staticlib } else { CrateType::Executable } |
| } |
| |
| /// Checks if target supports crate_type as output |
| pub fn invalid_output_for_target(sess: &Session, crate_type: CrateType) -> bool { |
| match crate_type { |
| CrateType::Cdylib | CrateType::Dylib | CrateType::ProcMacro => { |
| if !sess.target.dynamic_linking { |
| return true; |
| } |
| if sess.crt_static(Some(crate_type)) && !sess.target.crt_static_allows_dylibs { |
| return true; |
| } |
| } |
| _ => {} |
| } |
| if sess.target.only_cdylib { |
| match crate_type { |
| CrateType::ProcMacro | CrateType::Dylib => return true, |
| _ => {} |
| } |
| } |
| if !sess.target.executables && crate_type == CrateType::Executable { |
| return true; |
| } |
| |
| false |
| } |