use crate::core::builder::BuildContext;
use crate::core::builder::common;
use crate::platform;
use std::fs;
use std::path::Path;
use std::process::Command;
use std::time::Instant;
pub fn build(ctx: &BuildContext) -> Result<f64, String> {
let compiler = if ctx.compiler.is_empty() {
"cc"
} else {
ctx.compiler
};
let start_time = Instant::now();
let extensions = source_extensions(ctx.language);
let sources = common::collect_sources(
ctx.source_roots,
&extensions,
ctx.exclude_dirs,
ctx.include_paths,
)?;
let obj_dir = match ctx.target_dir {
Some(dir) => Path::new(dir).join("obj"),
None => Path::new("./target").join(ctx.profile).join("obj"),
};
let objects = build_objects(compiler, &sources, &obj_dir, ctx, "o")?;
if ctx.kind == "staticlib" {
let lib_path = platform::lib_path(ctx.profile, ctx.project_name, ctx.target_dir);
if !common::needs_link(&objects, &lib_path) {
let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
return Ok(elapsed);
}
let mut cmd = Command::new(ctx.archiver.unwrap_or("ar"));
cmd.arg("rcs").arg(&lib_path);
for obj in &objects {
cmd.arg(obj);
}
if ctx.verbose || std::env::var("DCR_DEBUG").is_ok() {
eprintln!("[dcr] {:?}", cmd);
}
match cmd.status() {
Ok(status) if status.success() => {
let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
return Ok(elapsed);
}
Ok(_) => return Err("Build failed".to_string()),
Err(err) => return Err(format!("Build failed: {err}")),
}
}
let mut cmd = Command::new(ctx.linker.unwrap_or(compiler));
if ctx.kind == "sharedlib" {
if cfg!(target_os = "macos") {
cmd.arg("-dynamiclib");
} else {
cmd.arg("-shared");
}
}
if ctx.kind == "efi" {
cmd.arg("-shared");
cmd.arg("-nostdlib");
cmd.arg("-Wl,-dll");
cmd.arg("-Wl,--subsystem,10");
}
for obj in &objects {
cmd.arg(obj);
}
for dir in ctx.lib_dirs {
cmd.arg(format!("-L{dir}"));
}
for lib in ctx.libs {
cmd.arg(format!("-l{lib}"));
}
for flag in ctx.ldflags {
cmd.arg(flag);
}
let name = ctx.output_filename.unwrap_or(ctx.project_name);
let ext = ctx.output_extension.unwrap_or("");
let final_name = if ext.is_empty() {
name.to_string()
} else {
format!("{}.{}", name, ext)
};
let out_path = if ctx.kind == "sharedlib" {
platform::shared_lib_path(ctx.profile, &final_name, ctx.target_dir)
} else if ctx.kind == "efi" {
platform::efi_path(ctx.profile, &final_name, ctx.target_dir)
} else if ctx.kind == "elf" {
platform::elf_path(ctx.profile, &final_name, ctx.target_dir)
} else {
platform::bin_path(ctx.profile, &final_name, ctx.target_dir)
};
if !common::needs_link(&objects, &out_path) {
let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
return Ok(elapsed);
}
cmd.arg("-o").arg(out_path);
if ctx.verbose || std::env::var("DCR_DEBUG").is_ok() {
eprintln!("[dcr] {:?}", cmd);
}
match cmd.status() {
Ok(status) if status.success() => {
let elapsed = ((start_time.elapsed().as_secs_f64() * 100.0).trunc()) / 100.0;
Ok(elapsed)
}
Ok(_) => Err("Build failed".to_string()),
Err(err) => Err(format!("Build failed: {err}")),
}
}
pub(crate) fn collect_sources(ctx: &BuildContext) -> Result<Vec<String>, String> {
let extensions = source_extensions(ctx.language);
common::collect_sources(
ctx.source_roots,
&extensions,
ctx.exclude_dirs,
ctx.include_paths,
)
}
fn source_extensions(language: &str) -> Vec<&str> {
let mut out = Vec::new();
for part in language.split(',').map(|s| s.trim()) {
let lang = part.to_lowercase();
match lang.as_str() {
"c" => out.extend(["c"]),
"c++" | "cpp" | "cxx" => out.extend(["cpp", "cxx", "cc"]),
"asm" => out.extend(["s", "S", "asm"]),
_ => {}
}
}
if out.is_empty() {
out.extend(["c"]);
}
out
}
fn default_flags(profile: &str) -> &'static [&'static str] {
match profile {
"release" => &["-O3", "-DNDEBUG"],
"debug" => &[
"-O0",
"-g",
"-Wall",
"-Wextra",
"-fno-omit-frame-pointer",
"-DDCR_DEBUG",
],
_ => &[],
}
}
fn is_bare_metal_target(target: Option<&str>) -> bool {
if let Some(t) = target {
let lower = t.to_lowercase();
lower.contains("none")
|| lower.contains("-elf")
|| lower.contains("eabi")
|| lower.contains("baremetal")
|| lower.contains("bare-metal")
} else {
false
}
}
fn build_objects(
compiler: &str,
sources: &[String],
obj_dir: &Path,
ctx: &BuildContext,
obj_ext: &str,
) -> Result<Vec<String>, String> {
let objects: Vec<String> = sources
.iter()
.map(|s| common::object_path(obj_dir, s, obj_ext))
.collect();
common::parallel_build(sources.len(), |i| {
build_object(compiler, &sources[i], &objects[i], ctx)
})?;
Ok(objects)
}
fn build_object(
compiler: &str,
source: &str,
obj_path: &str,
ctx: &BuildContext,
) -> Result<(), String> {
if let Some(parent) = Path::new(obj_path).parent() {
fs::create_dir_all(parent).map_err(|err| format!("obj dir error: {err}"))?;
}
if !common::needs_rebuild(source, obj_path) {
return Ok(());
}
let mut cmd = Command::new(compiler);
cmd.arg("-c");
if let Some(flag) = asm_lang_flag(source) {
cmd.arg("-x").arg(flag);
}
cmd.arg(source).arg("-o").arg(obj_path);
if ctx.kind == "sharedlib" {
cmd.arg("-fPIC");
}
if let Some(platform) = ctx.platform
&& !platform.trim().is_empty()
{
cmd.arg(format!("-march={}", platform));
}
if !ctx.standard.is_empty() && ctx.language.to_lowercase() != "asm" {
let ext = Path::new(source)
.extension()
.and_then(|e| e.to_str())
.unwrap_or("");
let is_cpp = matches!(ext, "cpp" | "cxx" | "cc");
if is_cpp && !ctx.cxx_standard.is_empty() {
cmd.arg(format!("-std={}", ctx.cxx_standard));
} else if !is_cpp {
cmd.arg(format!("-std={}", ctx.standard));
}
}
let use_dcr_defaults = ctx.cflags.is_empty() && !is_bare_metal_target(ctx.target);
if use_dcr_defaults {
for flag in default_flags(ctx.profile) {
cmd.arg(flag);
}
}
for flag in ctx.cflags {
cmd.arg(flag);
}
for dir in ctx.include_dirs {
cmd.arg(format!("-I{dir}"));
}
let d_path = Path::new(obj_path).with_extension("d");
cmd.arg("-MMD").arg("-MF").arg(&d_path);
if ctx.verbose || std::env::var("DCR_DEBUG").is_ok() {
eprintln!("[dcr] {:?}", cmd);
}
common::run_command_sync_output(&mut cmd)
}
fn asm_lang_flag(source: &str) -> Option<&'static str> {
let ext = Path::new(source).extension().and_then(|v| v.to_str())?;
match ext {
"S" => Some("assembler-with-cpp"),
"s" | "asm" => Some("assembler"),
_ => None,
}
}