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DushistovDushistov
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refactoring: make CMakeCache.txt const plus split build and conf cmds
1 parent 9af8515 commit 0aefc9d

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+52
-45
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1 file changed

+52
-45
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‎src/lib.rs‎

Lines changed: 52 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -105,6 +105,8 @@ pub fn build<P: AsRef<Path>>(path: P) -> PathBuf {
105105
Config::new(path.as_ref()).build()
106106
}
107107

108+
static CMAKE_CACHE_FILE: &str = "CMakeCache.txt";
109+
108110
impl Config {
109111
/// Return explicitly set profile or infer `CMAKE_BUILD_TYPE` from Rust's compilation profile.
110112
///
@@ -507,14 +509,14 @@ impl Config {
507509
let executable = self
508510
.getenv_target_os("CMAKE")
509511
.unwrap_or(OsString::from("cmake"));
510-
let mut cmd = Command::new(&executable);
512+
let mut conf_cmd = Command::new(&executable);
511513

512514
if self.verbose_cmake {
513-
cmd.arg("-Wdev");
514-
cmd.arg("--debug-output");
515+
conf_cmd.arg("-Wdev");
516+
conf_cmd.arg("--debug-output");
515517
}
516518

517-
cmd.arg(&self.path).current_dir(&build);
519+
conf_cmd.arg(&self.path).current_dir(&build);
518520
let mut is_ninja = false;
519521
if let Some(ref generator) = generator {
520522
is_ninja = generator.to_string_lossy().contains("Ninja");
@@ -547,15 +549,15 @@ impl Config {
547549
(false, false) => fail("no valid generator found for GNU toolchain; MSYS or MinGW must be installed")
548550
};
549551

550-
cmd.arg("-G").arg(generator);
552+
conf_cmd.arg("-G").arg(generator);
551553
}
552554
} else {
553555
// If we're cross compiling onto windows, then set some
554556
// variables which will hopefully get things to succeed. Some
555557
// systems may need the `windres` or `dlltool` variables set, so
556558
// set them if possible.
557559
if !self.defined("CMAKE_SYSTEM_NAME") {
558-
cmd.arg("-DCMAKE_SYSTEM_NAME=Windows");
560+
conf_cmd.arg("-DCMAKE_SYSTEM_NAME=Windows");
559561
}
560562
if !self.defined("CMAKE_RC_COMPILER") {
561563
let exe = find_exe(c_compiler.path());
@@ -565,7 +567,7 @@ impl Config {
565567
if windres.is_file() {
566568
let mut arg = OsString::from("-DCMAKE_RC_COMPILER=");
567569
arg.push(&windres);
568-
cmd.arg(arg);
570+
conf_cmd.arg(arg);
569571
}
570572
}
571573
}
@@ -576,27 +578,29 @@ impl Config {
576578
// This also guarantees that NMake generator isn't chosen implicitly.
577579
let using_nmake_generator;
578580
if generator.is_none() {
579-
cmd.arg("-G").arg(self.visual_studio_generator(&target));
581+
conf_cmd
582+
.arg("-G")
583+
.arg(self.visual_studio_generator(&target));
580584
using_nmake_generator = false;
581585
} else {
582586
using_nmake_generator = generator.as_ref().unwrap() == "NMake Makefiles";
583587
}
584588
if !is_ninja && !using_nmake_generator {
585589
if target.contains("x86_64") {
586590
if self.generator_toolset.is_none() {
587-
cmd.arg("-Thost=x64");
591+
conf_cmd.arg("-Thost=x64");
588592
}
589-
cmd.arg("-Ax64");
593+
conf_cmd.arg("-Ax64");
590594
} else if target.contains("thumbv7a") {
591595
if self.generator_toolset.is_none() {
592-
cmd.arg("-Thost=x64");
596+
conf_cmd.arg("-Thost=x64");
593597
}
594-
cmd.arg("-Aarm");
598+
conf_cmd.arg("-Aarm");
595599
} else if target.contains("aarch64") {
596600
if self.generator_toolset.is_none() {
597-
cmd.arg("-Thost=x64");
601+
conf_cmd.arg("-Thost=x64");
598602
}
599-
cmd.arg("-AARM64");
603+
conf_cmd.arg("-AARM64");
600604
} else if target.contains("i686") {
601605
use cc::windows_registry::{find_vs_version, VsVers};
602606
match find_vs_version() {
@@ -605,9 +609,9 @@ impl Config {
605609
// but Visual Studio 2019 changed the default toolset to match the host,
606610
// so we need to manually override it for x86 targets
607611
if self.generator_toolset.is_none() {
608-
cmd.arg("-Thost=x86");
612+
conf_cmd.arg("-Thost=x86");
609613
}
610-
cmd.arg("-AWin32");
614+
conf_cmd.arg("-AWin32");
611615
}
612616
_ => {}
613617
};
@@ -617,38 +621,38 @@ impl Config {
617621
}
618622
} else if target.contains("redox") {
619623
if !self.defined("CMAKE_SYSTEM_NAME") {
620-
cmd.arg("-DCMAKE_SYSTEM_NAME=Generic");
624+
conf_cmd.arg("-DCMAKE_SYSTEM_NAME=Generic");
621625
}
622626
} else if target.contains("solaris") {
623627
if !self.defined("CMAKE_SYSTEM_NAME") {
624-
cmd.arg("-DCMAKE_SYSTEM_NAME=SunOS");
628+
conf_cmd.arg("-DCMAKE_SYSTEM_NAME=SunOS");
625629
}
626630
} else if target.contains("apple-ios") || target.contains("apple-tvos") {
627631
// These two flags prevent CMake from adding an OSX sysroot, which messes up compilation.
628632
if !self.defined("CMAKE_OSX_SYSROOT") && !self.defined("CMAKE_OSX_DEPLOYMENT_TARGET") {
629-
cmd.arg("-DCMAKE_OSX_SYSROOT=/");
630-
cmd.arg("-DCMAKE_OSX_DEPLOYMENT_TARGET=");
633+
conf_cmd.arg("-DCMAKE_OSX_SYSROOT=/");
634+
conf_cmd.arg("-DCMAKE_OSX_DEPLOYMENT_TARGET=");
631635
}
632636
}
633637
if let Some(ref generator) = generator {
634-
cmd.arg("-G").arg(generator);
638+
conf_cmd.arg("-G").arg(generator);
635639
}
636640
if let Some(ref generator_toolset) = self.generator_toolset {
637-
cmd.arg("-T").arg(generator_toolset);
641+
conf_cmd.arg("-T").arg(generator_toolset);
638642
}
639643
let profile = self.get_profile().to_string();
640644
for &(ref k, ref v) in &self.defines {
641645
let mut os = OsString::from("-D");
642646
os.push(k);
643647
os.push("=");
644648
os.push(v);
645-
cmd.arg(os);
649+
conf_cmd.arg(os);
646650
}
647651

648652
if !self.defined("CMAKE_INSTALL_PREFIX") {
649653
let mut dstflag = OsString::from("-DCMAKE_INSTALL_PREFIX=");
650654
dstflag.push(&dst);
651-
cmd.arg(dstflag);
655+
conf_cmd.arg(dstflag);
652656
}
653657

654658
let build_type = self
@@ -683,7 +687,7 @@ impl Config {
683687
flagsflag.push(" ");
684688
flagsflag.push(arg);
685689
}
686-
cmd.arg(flagsflag);
690+
conf_cmd.arg(flagsflag);
687691
}
688692

689693
// The visual studio generator apparently doesn't respect
@@ -707,7 +711,7 @@ impl Config {
707711
flagsflag.push(" ");
708712
flagsflag.push(arg);
709713
}
710-
cmd.arg(flagsflag);
714+
conf_cmd.arg(flagsflag);
711715
}
712716
}
713717

@@ -746,7 +750,7 @@ impl Config {
746750
.collect::<Vec<_>>();
747751
ccompiler = OsString::from_wide(&wchars);
748752
}
749-
cmd.arg(ccompiler);
753+
conf_cmd.arg(ccompiler);
750754
}
751755
};
752756

@@ -756,39 +760,42 @@ impl Config {
756760
}
757761

758762
if !self.defined("CMAKE_BUILD_TYPE") {
759-
cmd.arg(&format!("-DCMAKE_BUILD_TYPE={}", profile));
763+
conf_cmd.arg(&format!("-DCMAKE_BUILD_TYPE={}", profile));
760764
}
761765

762766
if self.verbose_make {
763-
cmd.arg("-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON");
767+
conf_cmd.arg("-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON");
764768
}
765769

766770
if !self.defined("CMAKE_TOOLCHAIN_FILE") {
767771
if let Some(s) = self.getenv_target_os("CMAKE_TOOLCHAIN_FILE") {
768772
let mut cmake_toolchain_file = OsString::from("-DCMAKE_TOOLCHAIN_FILE=");
769773
cmake_toolchain_file.push(&s);
770-
cmd.arg(cmake_toolchain_file);
774+
conf_cmd.arg(cmake_toolchain_file);
771775
}
772776
}
773777

774778
for &(ref k, ref v) in c_compiler.env().iter().chain(&self.env) {
775-
cmd.env(k, v);
779+
conf_cmd.env(k, v);
776780
}
777781

778-
if self.always_configure || !build.join("CMakeCache.txt").exists() {
779-
cmd.args(&self.configure_args);
780-
run(cmd.env("CMAKE_PREFIX_PATH", cmake_prefix_path), "cmake");
782+
if self.always_configure || !build.join(CMAKE_CACHE_FILE).exists() {
783+
conf_cmd.args(&self.configure_args);
784+
run(
785+
conf_cmd.env("CMAKE_PREFIX_PATH", cmake_prefix_path),
786+
"cmake",
787+
);
781788
} else {
782789
println!("CMake project was already configured. Skipping configuration step.");
783790
}
784791

785792
// And build!
786793
let target = self.cmake_target.clone().unwrap_or("install".to_string());
787-
let mut cmd = Command::new(&executable);
788-
cmd.current_dir(&build);
794+
let mut build_cmd = Command::new(&executable);
795+
build_cmd.current_dir(&build);
789796

790797
for &(ref k, ref v) in c_compiler.env().iter().chain(&self.env) {
791-
cmd.env(k, v);
798+
build_cmd.env(k, v);
792799
}
793800

794801
// If the generated project is Makefile based we should carefully transfer corresponding CARGO_MAKEFLAGS
@@ -806,30 +813,30 @@ impl Config {
806813
|| cfg!(target_os = "bitrig")
807814
|| cfg!(target_os = "dragonflybsd")) =>
808815
{
809-
cmd.env("MAKEFLAGS", makeflags);
816+
build_cmd.env("MAKEFLAGS", makeflags);
810817
}
811818
_ => {}
812819
}
813820
}
814821

815-
cmd.arg("--build").arg(".");
822+
build_cmd.arg("--build").arg(".");
816823

817824
if !self.no_build_target {
818-
cmd.arg("--target").arg(target);
825+
build_cmd.arg("--target").arg(target);
819826
}
820827

821-
cmd.arg("--config").arg(&profile);
828+
build_cmd.arg("--config").arg(&profile);
822829

823830
if let Ok(s) = env::var("NUM_JOBS") {
824831
// See https://cmake.org/cmake/help/v3.12/manual/cmake.1.html#build-tool-mode
825-
cmd.arg("--parallel").arg(s);
832+
build_cmd.arg("--parallel").arg(s);
826833
}
827834

828835
if !&self.build_args.is_empty() {
829-
cmd.arg("--").args(&self.build_args);
836+
build_cmd.arg("--").args(&self.build_args);
830837
}
831838

832-
run(&mut cmd, "cmake");
839+
run(&mut build_cmd, "cmake");
833840

834841
println!("cargo:root={}", dst.display());
835842
return dst;
@@ -903,7 +910,7 @@ impl Config {
903910
// isn't relevant to us but we canonicalize it here to ensure
904911
// we're both checking the same thing.
905912
let path = fs::canonicalize(&self.path).unwrap_or(self.path.clone());
906-
let mut f = match File::open(dir.join("CMakeCache.txt")) {
913+
let mut f = match File::open(dir.join(CMAKE_CACHE_FILE)) {
907914
Ok(f) => f,
908915
Err(..) => return,
909916
};

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