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|
//! Related to out filenames of compilation (e.g. save analysis, binaries).
use crate::config::{CrateType, Input, OutputFilenames, OutputType};
use crate::errors::{
CrateNameDoesNotMatch, CrateNameEmpty, CrateNameInvalid, FileIsNotWriteable,
InvalidCharacterInCrateName,
};
use crate::Session;
use rustc_ast as ast;
use rustc_span::symbol::sym;
use rustc_span::{Span, Symbol};
use std::path::{Path, PathBuf};
pub fn out_filename(
sess: &Session,
crate_type: CrateType,
outputs: &OutputFilenames,
crate_name: Symbol,
) -> 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.emit_fatal(FileIsNotWriteable { file });
}
}
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]) -> Symbol {
let validate = |s: Symbol, 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 {
let s = Symbol::intern(s);
if let Some((attr, name)) = attr_crate_name {
if name != s {
sess.emit_err(CrateNameDoesNotMatch { span: attr.span, s, name });
}
}
return validate(s, None);
}
if let Some((attr, s)) = attr_crate_name {
return validate(s, Some(attr.span));
}
if let Input::File(ref path) = sess.io.input {
if let Some(s) = path.file_stem().and_then(|s| s.to_str()) {
if s.starts_with('-') {
sess.emit_err(CrateNameInvalid { s });
} else {
return validate(Symbol::intern(&s.replace('-', "_")), None);
}
}
}
Symbol::intern("rust_out")
}
pub fn validate_crate_name(sess: &Session, s: Symbol, sp: Option<Span>) {
let mut err_count = 0;
{
if s.is_empty() {
err_count += 1;
sess.emit_err(CrateNameEmpty { span: sp });
}
for c in s.as_str().chars() {
if c.is_alphanumeric() {
continue;
}
if c == '_' {
continue;
}
err_count += 1;
sess.emit_err(InvalidCharacterInCrateName { span: sp, character: c, crate_name: s });
}
}
if err_count > 0 {
sess.abort_if_errors();
}
}
pub fn filename_for_metadata(
sess: &Session,
crate_name: Symbol,
outputs: &OutputFilenames,
) -> PathBuf {
// If the command-line specified the path, use that directly.
if let Some(Some(out_filename)) = sess.opts.output_types.get(&OutputType::Metadata) {
return out_filename.clone();
}
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{libname}.rmeta")));
check_file_is_writeable(&out_filename, sess);
out_filename
}
pub fn filename_for_input(
sess: &Session,
crate_type: CrateType,
crate_name: Symbol,
outputs: &OutputFilenames,
) -> PathBuf {
let libname = format!("{}{}", crate_name, sess.opts.cg.extra_filename);
match crate_type {
CrateType::Rlib => outputs.out_directory.join(&format!("lib{libname}.rlib")),
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 {
if let CrateType::Cdylib | CrateType::Dylib | CrateType::ProcMacro = crate_type {
if !sess.target.dynamic_linking {
return true;
}
if sess.crt_static(Some(crate_type)) && !sess.target.crt_static_allows_dylibs {
return true;
}
}
if let CrateType::ProcMacro | CrateType::Dylib = crate_type && sess.target.only_cdylib {
return true;
}
if let CrateType::Executable = crate_type && !sess.target.executables {
return true;
}
false
}
|
