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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use rustc::session::config::{self, OutputFilenames, Input, OutputType};
use rustc::session::Session;
use rustc::middle::cstore;
use std::path::PathBuf;
use syntax::ast;
use syntax_pos::Span;
pub fn find_crate_name(sess: Option<&Session>,
attrs: &[ast::Attribute],
input: &Input) -> String {
let validate = |s: String, span: Option<Span>| {
cstore::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 = attrs.iter().find(|at| at.check_name("crate_name"))
.and_then(|at| at.value_str().map(|s| (at, s)));
if let Some(sess) = sess {
if let Some(ref s) = sess.opts.crate_name {
if let Some((attr, name)) = attr_crate_name {
if name != &**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);
if let Some(sess) = sess {
sess.err(&msg);
}
} else {
return validate(s.replace("-", "_"), None);
}
}
}
"rust_out".to_string()
}
pub fn filename_for_input(sess: &Session,
crate_type: config::CrateType,
crate_name: &str,
outputs: &OutputFilenames) -> PathBuf {
let libname = format!("{}{}", crate_name, sess.opts.cg.extra_filename);
match crate_type {
config::CrateTypeRlib => {
outputs.out_directory.join(&format!("lib{}.rlib", libname))
}
config::CrateTypeCdylib |
config::CrateTypeProcMacro |
config::CrateTypeDylib => {
let (prefix, suffix) = (&sess.target.target.options.dll_prefix,
&sess.target.target.options.dll_suffix);
outputs.out_directory.join(&format!("{}{}{}", prefix, libname,
suffix))
}
config::CrateTypeStaticlib => {
let (prefix, suffix) = (&sess.target.target.options.staticlib_prefix,
&sess.target.target.options.staticlib_suffix);
outputs.out_directory.join(&format!("{}{}{}", prefix, libname,
suffix))
}
config::CrateTypeExecutable => {
let suffix = &sess.target.target.options.exe_suffix;
let out_filename = outputs.path(OutputType::Exe);
if suffix.is_empty() {
out_filename.to_path_buf()
} 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 CrateTypeExecutable 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) -> config::CrateType {
if !sess.target.target.options.executables {
config::CrateTypeStaticlib
} else {
config::CrateTypeExecutable
}
}
/// Checks if target supports crate_type as output
pub fn invalid_output_for_target(sess: &Session,
crate_type: config::CrateType) -> bool {
match (sess.target.target.options.dynamic_linking,
sess.target.target.options.executables, crate_type) {
(false, _, config::CrateTypeCdylib) |
(false, _, config::CrateTypeDylib) |
(false, _, config::CrateTypeProcMacro) => true,
(true, _, config::CrateTypeCdylib) |
(true, _, config::CrateTypeDylib) => sess.crt_static() &&
!sess.target.target.options.crt_static_allows_dylibs,
(_, false, config::CrateTypeExecutable) => true,
_ => false
}
}
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