Use Cargo's target directory sharing.

This speeds up `./mach build --dev` followed by `./mach build-cef` by a
large amount, and also speeds up other build combos found in our CI.

Author: metajack

cargo-nightly-build

@@ -1 +1 @@
-2015-04-14
+2015-06-15

components/servo/.cargo/config

@@ -1,5 +1,5 @@
 paths = ["../../support/android-rs-glue"]
 
 [target.arm-linux-androideabi]
-linker = "../../support/android-rs-glue/apk-builder/target/debug/apk-builder"
+linker = "../../target/debug/apk-builder"
 ar = "arm-linux-androideabi-ar"

components/util/resource_files.rs

@@ -21,34 +21,29 @@ pub fn resources_dir_path() -> PathBuf {
         Some(ref path) => PathBuf::from(path),
         None => {
             // FIXME: Find a way to not rely on the executable being
-            // under `<servo source>/components/servo/target`
-            // or `<servo source>/components/servo/target/release`.
+            // under `<servo source>[/$target_triple]/target/debug`
+            // or `<servo source>[/$target_triple]/target/release`.
             let mut path = env::current_exe().ok().expect("can't get exe path");
             path.pop();
             path.push("resources");
             if !path.is_dir() {   // resources dir not in same dir as exe?
-                path.pop();
+                // exe is probably in target/{debug,release} so we need to go back to topdir
                 path.pop();
                 path.pop();
                 path.pop();
                 path.push("resources");
-                if !path.is_dir() {  // self_exe_path() is probably in .../target/release
+                if !path.is_dir() {
+                    // exe is probably in target/$target_triple/{debug,release} so go back one more
                     path.pop();
                     path.pop();
                     path.push("resources");
-                    if !path.is_dir() { // self_exe_path() is probably in .../target/release
-                        path.pop();
-                        path.pop();
-                        path.push("resources");
-                    }
                 }
             }
             path
         }
     }
 }
 
-
 pub fn read_resource_file(relative_path_components: &[&str]) -> io::Result<Vec<u8>> {
     let mut path = resources_dir_path();
     for component in relative_path_components {

etc/ci/upload_docs.sh

@@ -10,7 +10,7 @@ cd "$(dirname $0)/../.."
 
 ./mach doc
 # etc/doc.servo.org/index.html overwrites $(mach rust-root)/doc/index.html
-cp etc/doc.servo.org/* components/servo/target/doc/
+cp etc/doc.servo.org/* target/doc/
 
-ghp-import -n components/servo/target/doc
+ghp-import -n target/doc
 git push -qf https://${TOKEN}@github.com/servo/doc.servo.org.git gh-pages

ports/cef/Cargo.toml

@@ -12,7 +12,6 @@ crate-type = ["dylib"]
 log = "*"
 url = "*"
 libc = "*"
-objc = "0.1"
 
 [dependencies.servo]
 path = "../../components/servo"
@@ -72,6 +71,7 @@ git = "https://github.com/servo/rust-stb-image"
 git = "https://github.com/servo/gleam"
 
 [target.x86_64-apple-darwin.dependencies]
+objc = "0.1"
 cocoa = "*"
 core-foundation = "*"
 core-graphics = "*"

ports/gonk/README.md

@@ -51,7 +51,7 @@ Run `./mach build-gonk` from the root directory
 
 ## Copy the files to the Flame
 
-To reduce the size of libmozjs.so (`ports/gonk/target/arm-linux-androideabi/build/mozjs-sys-*/out/libmozjs.so`),
+To reduce the size of libmozjs.so (`target/arm-linux-androideabi/build/mozjs-sys-*/out/libmozjs.so`),
 you can run `strip` on it. Use the one in your toolchain (`$ANDROID_TOOLCHAIN/bin/arm-linux-androideabi-strip libmozjs.so`).
 
 Make sure the device is on, connected to wifi, with high or no screen timeout.
@@ -64,7 +64,7 @@ adb remount
 adb push /path/to/stripped/mozjs.so system/lib
 
 # Copy b2s
-adb push ports/gonk/target/arm-linux-androideabi system/bin
+adb push target/arm-linux-androideabi system/bin
 
 # Copy resources
 adb shell mkdir sdcard/servo

python/servo/build_commands.py

@@ -147,7 +147,7 @@ def build(self, target=None, release=False, dev=False, jobs=None,
         opts = params or []
         features = []
 
-        base_path = path.join("components", "servo", "target")
+        base_path = self.get_target_dir()
         release_path = path.join(base_path, "release", "servo")
         dev_path = path.join(base_path, "debug", "servo")
 

python/servo/command_base.py

@@ -130,8 +130,14 @@ def cargo_build_id(self):
             self._cargo_build_id = open(filename).read().strip()
         return self._cargo_build_id
 
+    def get_target_dir(self):
+        if "CARGO_TARGET_DIR" in os.environ:
+            return os.environ["CARGO_TARGET_DIR"]
+        else:
+            return path.join(self.context.topdir, "target")
+
     def get_binary_path(self, release, dev):
-        base_path = path.join("components", "servo", "target")
+        base_path = self.get_target_dir()
         release_path = path.join(base_path, "release", "servo")
         dev_path = path.join(base_path, "debug", "servo")
 
@@ -199,6 +205,9 @@ def build_env(self, gonk=False, hosts_file_path=None):
         if "CARGO_HOME" not in env:
             env["CARGO_HOME"] = self.config["tools"]["cargo-home-dir"]
 
+        if "CARGO_TARGET_DIR" not in env:
+            env["CARGO_TARGET_DIR"] = path.join(self.context.topdir, "target")
+
         if extra_lib:
             if sys.platform == "darwin":
                 env["DYLD_LIBRARY_PATH"] = "%s%s%s" % \

python/servo/post_build_commands.py

@@ -137,8 +137,7 @@ def doc(self, params):
         if not path.exists(path.join(self.config["tools"]["rust-root"], "doc")):
             Registrar.dispatch("bootstrap-rust-docs", context=self.context)
         rust_docs = path.join(self.config["tools"]["rust-root"], "doc")
-        docs = path.join(
-            self.context.topdir, "components", "servo", "target", "doc")
+        docs = path.join(self.get_target_dir(), "doc")
         if not path.exists(docs):
             os.makedirs(docs)
 
@@ -167,4 +166,4 @@ def serve_docs(self):
         self.doc([])
         import webbrowser
         webbrowser.open("file://" + path.abspath(path.join(
-            self.servo_crate(), "target", "doc", "servo", "index.html")))
+            self.get_target_dir(), "doc", "servo", "index.html")))

python/servo/testing_commands.py

@@ -47,12 +47,11 @@ def ensure_built_tests(self):
 
     def find_test(self, prefix):
         target_contents = os.listdir(path.join(
-            self.context.topdir, "components", "servo", "target", "debug"))
+            self.get_target_dir(), "debug"))
         for filename in target_contents:
             if filename.startswith(prefix + "-"):
                 filepath = path.join(
-                    self.context.topdir, "components", "servo",
-                    "target", "debug", filename)
+                    self.get_target_dir(), "debug", filename)
 
                 if path.isfile(filepath) and os.access(filepath, os.X_OK):
                     return filepath

python/tidy.py

@@ -36,8 +36,7 @@
     # Generated and upstream code combined with our own. Could use cleanup
     "components/script/dom/bindings/codegen/*",
     "components/style/properties/mod.rs",
-    "components/servo/target/*",
-    "ports/gonk/target/*",
+    "target/*",
     "ports/gonk/src/native_window_glue.cpp",
     "ports/cef/*",
 

tests/power/PowerMeasure.py

@@ -44,7 +44,7 @@ def PowerCollector(OutputDir, Benchmarks, LayoutThreads, Renderer):
                 power_dir, "power-Layout%d-set%d.csv" % (layoutT, ExpNum))
             TimeFiles = path.join(
                 time_dir, "time-Layout%d-set%d.csv" % (layoutT, ExpNum))
-            ServoCmd = "(time ../../components/servo/target/release/servo -x -y %d %s %s) 2> %s" % \
+            ServoCmd = "(time ../../target/release/servo -x -y %d %s %s) 2> %s" % \
                        (layoutT, Renderer, Benchmarks, TimeFiles)
             Metrics = path.join(
                 etc_dir, "metrics-Layout%d-set%d-css.csv" % (layoutT, ExpNum))

tests/wpt/harness/test/test.cfg.example

@@ -8,7 +8,7 @@ ssl-type=none
 # prefs-root=/path/to/gecko-src/testing/profiles/
 
 # [servo]
-# binary=/path/to/servo-src/components/servo/target/servo
+# binary=/path/to/servo-src/target/release/servo
 # exclude=testharness # Because it needs a special testharness.js
 
 # [chrome]

tests/wpt/run.py

@@ -40,7 +40,7 @@ def set_defaults(paths, kwargs):
 
     if kwargs["binary"] is None:
         bin_dir = "release" if kwargs["release"] else "debug"
-        bin_path = servo_path("components", "servo", "target", bin_dir, "servo")
+        bin_path = servo_path("target", bin_dir, "servo")
 
         kwargs["binary"] = bin_path