Auto merge of #6989 - da-x:custom-profile-pr-rfc, r=ehuss

Support for named profiles (RFC 2678)

Tracking issue: #6988

Implementation according to the [RFC](https://github.com/rust-lang/rfcs/blob/master/text/2678-named-custom-cargo-profiles.md).

src/bin/cargo/commands/bench.rs

@@ -73,9 +73,18 @@ Compilation can be customized with the `bench` profile in the manifest.
 
 pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let ws = args.workspace(config)?;
-    let mut compile_opts = args.compile_options(config, CompileMode::Bench, Some(&ws))?;
+    let mut compile_opts = args.compile_options(
+        config,
+        CompileMode::Bench,
+        Some(&ws),
+        ProfileChecking::Checked,
+    )?;
 
-    compile_opts.build_config.release = true;
+    compile_opts.build_config.profile_kind = args.get_profile_kind(
+        config,
+        ProfileKind::Custom("bench".to_owned()),
+        ProfileChecking::Checked,
+    )?;
 
     let ops = TestOptions {
         no_run: args.is_present("no-run"),

src/bin/cargo/commands/build.rs

@@ -27,6 +27,7 @@ pub fn cli() -> App {
             "Build all targets",
         )
         .arg_release("Build artifacts in release mode, with optimizations")
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Build for the target triple")
         .arg_target_dir()
@@ -55,7 +56,12 @@ the --release flag will use the `release` profile instead.
 
 pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let ws = args.workspace(config)?;
-    let mut compile_opts = args.compile_options(config, CompileMode::Build, Some(&ws))?;
+    let mut compile_opts = args.compile_options(
+        config,
+        CompileMode::Build,
+        Some(&ws),
+        ProfileChecking::Checked,
+    )?;
 
     compile_opts.export_dir = args.value_of_path("out-dir", config);
     if compile_opts.export_dir.is_some() {

src/bin/cargo/commands/check.rs

@@ -27,7 +27,7 @@ pub fn cli() -> App {
             "Check all targets",
         )
         .arg_release("Check artifacts in release mode, with optimizations")
-        .arg(opt("profile", "Profile to build the selected target for").value_name("PROFILE"))
+        .arg_profile("Check artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Check for the target triple")
         .arg_target_dir()
@@ -69,7 +69,7 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
         }
     };
     let mode = CompileMode::Check { test };
-    let compile_opts = args.compile_options(config, mode, Some(&ws))?;
+    let compile_opts = args.compile_options(config, mode, Some(&ws), ProfileChecking::Unchecked)?;
 
     ops::compile(&ws, &compile_opts)?;
     Ok(())

src/bin/cargo/commands/clean.rs

@@ -11,6 +11,7 @@ pub fn cli() -> App {
         .arg_target_triple("Target triple to clean output for")
         .arg_target_dir()
         .arg_release("Whether or not to clean release artifacts")
+        .arg_profile("Clean artifacts of the specified profile")
         .arg_doc("Whether or not to clean just the documentation directory")
         .after_help(
             "\
@@ -28,7 +29,8 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
         config,
         spec: values(args, "package"),
         target: args.target(),
-        release: args.is_present("release"),
+        profile_kind: args.get_profile_kind(config, ProfileKind::Dev, ProfileChecking::Checked)?,
+        profile_specified: args.is_present("profile") || args.is_present("release"),
         doc: args.is_present("doc"),
     };
     ops::clean(&ws, &opts)?;

src/bin/cargo/commands/clippy.rs

@@ -26,6 +26,7 @@ pub fn cli() -> App {
             "Check all targets",
         )
         .arg_release("Check artifacts in release mode, with optimizations")
+        .arg_profile("Check artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Check for the target triple")
         .arg_target_dir()
@@ -61,7 +62,8 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let ws = args.workspace(config)?;
 
     let mode = CompileMode::Check { test: false };
-    let mut compile_opts = args.compile_options(config, mode, Some(&ws))?;
+    let mut compile_opts =
+        args.compile_options(config, mode, Some(&ws), ProfileChecking::Checked)?;
 
     if !config.cli_unstable().unstable_options {
         return Err(failure::format_err!(

src/bin/cargo/commands/doc.rs

@@ -24,6 +24,7 @@ pub fn cli() -> App {
             "Document all binaries",
         )
         .arg_release("Build artifacts in release mode, with optimizations")
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Build for the target triple")
         .arg_target_dir()
@@ -52,7 +53,8 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let mode = CompileMode::Doc {
         deps: !args.is_present("no-deps"),
     };
-    let mut compile_opts = args.compile_options(config, mode, Some(&ws))?;
+    let mut compile_opts =
+        args.compile_options(config, mode, Some(&ws), ProfileChecking::Checked)?;
     compile_opts.local_rustdoc_args = if args.is_present("document-private-items") {
         Some(vec!["--document-private-items".to_string()])
     } else {

src/bin/cargo/commands/fix.rs

@@ -25,7 +25,7 @@ pub fn cli() -> App {
             "Fix all targets (default)",
         )
         .arg_release("Fix artifacts in release mode, with optimizations")
-        .arg(opt("profile", "Profile to build the selected target for").value_name("PROFILE"))
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Fix for the target triple")
         .arg_target_dir()
@@ -132,7 +132,7 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
 
     // Unlike other commands default `cargo fix` to all targets to fix as much
     // code as we can.
-    let mut opts = args.compile_options(config, mode, Some(&ws))?;
+    let mut opts = args.compile_options(config, mode, Some(&ws), ProfileChecking::Unchecked)?;
 
     let use_clippy = args.is_present("clippy");
 

src/bin/cargo/commands/install.rs

@@ -51,6 +51,7 @@ pub fn cli() -> App {
             "Do not save tracking information (unstable)",
         ))
         .arg_features()
+        .arg_profile("Install artifacts with from the specified profile")
         .arg(opt("debug", "Build in debug mode instead of release mode"))
         .arg_targets_bins_examples(
             "Install only the specified binary",
@@ -115,9 +116,15 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     }
 
     let workspace = args.workspace(config).ok();
-    let mut compile_opts = args.compile_options(config, CompileMode::Build, workspace.as_ref())?;
-
-    compile_opts.build_config.release = !args.is_present("debug");
+    let mut compile_opts = args.compile_options(
+        config,
+        CompileMode::Build,
+        workspace.as_ref(),
+        ProfileChecking::Checked,
+    )?;
+
+    compile_opts.build_config.profile_kind =
+        args.get_profile_kind(config, ProfileKind::Release, ProfileChecking::Checked)?;
 
     let krates = args
         .values_of("crate")

src/bin/cargo/commands/run.rs

@@ -18,6 +18,7 @@ pub fn cli() -> App {
         .arg_package("Package with the target to run")
         .arg_jobs()
         .arg_release("Build artifacts in release mode, with optimizations")
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Build for the target triple")
         .arg_target_dir()
@@ -40,7 +41,12 @@ run. If you're passing arguments to both Cargo and the binary, the ones after
 pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let ws = args.workspace(config)?;
 
-    let mut compile_opts = args.compile_options(config, CompileMode::Build, Some(&ws))?;
+    let mut compile_opts = args.compile_options(
+        config,
+        CompileMode::Build,
+        Some(&ws),
+        ProfileChecking::Checked,
+    )?;
 
     if !args.is_present("example") && !args.is_present("bin") {
         let default_runs: Vec<_> = compile_opts

src/bin/cargo/commands/rustc.rs

@@ -23,7 +23,7 @@ pub fn cli() -> App {
             "Build all targets",
         )
         .arg_release("Build artifacts in release mode, with optimizations")
-        .arg(opt("profile", "Profile to build the selected target for").value_name("PROFILE"))
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Target triple which compiles will be for")
         .arg_target_dir()
@@ -63,7 +63,12 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
             return Err(CliError::new(err, 101));
         }
     };
-    let mut compile_opts = args.compile_options_for_single_package(config, mode, Some(&ws))?;
+    let mut compile_opts = args.compile_options_for_single_package(
+        config,
+        mode,
+        Some(&ws),
+        ProfileChecking::Unchecked,
+    )?;
     let target_args = values(args, "args");
     compile_opts.target_rustc_args = if target_args.is_empty() {
         None

src/bin/cargo/commands/rustdoc.rs

@@ -27,6 +27,7 @@ pub fn cli() -> App {
             "Build all targets",
         )
         .arg_release("Build artifacts in release mode, with optimizations")
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Build for the target triple")
         .arg_target_dir()
@@ -55,6 +56,7 @@ pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
         config,
         CompileMode::Doc { deps: false },
         Some(&ws),
+        ProfileChecking::Checked,
     )?;
     let target_args = values(args, "args");
     compile_opts.target_rustdoc_args = if target_args.is_empty() {

src/bin/cargo/commands/test.rs

@@ -47,6 +47,7 @@ pub fn cli() -> App {
         )
         .arg_jobs()
         .arg_release("Build artifacts in release mode, with optimizations")
+        .arg_profile("Build artifacts with the specified profile")
         .arg_features()
         .arg_target_triple("Build for the target triple")
         .arg_target_dir()
@@ -99,7 +100,18 @@ To get the list of all options available for the test binaries use this:
 pub fn exec(config: &mut Config, args: &ArgMatches<'_>) -> CliResult {
     let ws = args.workspace(config)?;
 
-    let mut compile_opts = args.compile_options(config, CompileMode::Test, Some(&ws))?;
+    let mut compile_opts = args.compile_options(
+        config,
+        CompileMode::Test,
+        Some(&ws),
+        ProfileChecking::Checked,
+    )?;
+
+    compile_opts.build_config.profile_kind = args.get_profile_kind(
+        config,
+        ProfileKind::Custom("test".to_owned()),
+        ProfileChecking::Checked,
+    )?;
 
     // `TESTNAME` is actually an argument of the test binary, but it's
     // important, so we explicitly mention it and reconfigure.

src/cargo/core/compiler/build_config.rs

@@ -6,15 +6,32 @@ use crate::core::compiler::{CompileKind, CompileTarget};
 use crate::util::ProcessBuilder;
 use crate::util::{CargoResult, Config, RustfixDiagnosticServer};
 
+#[derive(Debug, Clone)]
+pub enum ProfileKind {
+    Dev,
+    Release,
+    Custom(String),
+}
+
+impl ProfileKind {
+    pub fn name(&self) -> &str {
+        match self {
+            ProfileKind::Dev => "dev",
+            ProfileKind::Release => "release",
+            ProfileKind::Custom(name) => &name,
+        }
+    }
+}
+
 /// Configuration information for a rustc build.
 #[derive(Debug)]
 pub struct BuildConfig {
     /// The requested kind of compilation for this session
     pub requested_kind: CompileKind,
     /// Number of rustc jobs to run in parallel.
     pub jobs: u32,
-    /// `true` if we are building for release.
-    pub release: bool,
+    /// Build profile
+    pub profile_kind: ProfileKind,
     /// The mode we are compiling in.
     pub mode: CompileMode,
     /// `true` to print stdout in JSON format (for machine reading).
@@ -77,7 +94,7 @@ impl BuildConfig {
         Ok(BuildConfig {
             requested_kind,
             jobs,
-            release: false,
+            profile_kind: ProfileKind::Dev,
             mode,
             message_format: MessageFormat::Human,
             force_rebuild: false,
@@ -102,6 +119,10 @@ impl BuildConfig {
         }
     }
 
+    pub fn profile_name(&self) -> &str {
+        self.profile_kind.name()
+    }
+
     pub fn test(&self) -> bool {
         self.mode == CompileMode::Test || self.mode == CompileMode::Bench
     }

src/cargo/core/compiler/context/mod.rs

@@ -298,15 +298,12 @@ impl<'a, 'cfg> Context<'a, 'cfg> {
         export_dir: Option<PathBuf>,
         units: &[Unit<'a>],
     ) -> CargoResult<()> {
-        let dest = if self.bcx.build_config.release {
-            "release"
-        } else {
-            "debug"
-        };
-        let host_layout = Layout::new(self.bcx.ws, None, dest)?;
+        let profile_kind = &self.bcx.build_config.profile_kind;
+        let dest = self.bcx.profiles.get_dir_name(profile_kind);
+        let host_layout = Layout::new(self.bcx.ws, None, &dest)?;
         let mut targets = HashMap::new();
         if let CompileKind::Target(target) = self.bcx.build_config.requested_kind {
-            let layout = Layout::new(self.bcx.ws, Some(target), dest)?;
+            let layout = Layout::new(self.bcx.ws, Some(target), &dest)?;
             standard_lib::prepare_sysroot(&layout)?;
             targets.insert(target, layout);
         }

src/cargo/core/compiler/custom_build.rs

@@ -6,7 +6,7 @@ use std::str;
 use std::sync::Arc;
 
 use crate::core::compiler::job_queue::JobState;
-use crate::core::PackageId;
+use crate::core::{profiles::ProfileRoot, PackageId};
 use crate::util::errors::{CargoResult, CargoResultExt};
 use crate::util::machine_message::{self, Message};
 use crate::util::{self, internal, paths, profile};
@@ -163,10 +163,9 @@ fn build_work<'a, 'cfg>(cx: &mut Context<'a, 'cfg>, unit: &Unit<'a>) -> CargoRes
         .env("OPT_LEVEL", &unit.profile.opt_level.to_string())
         .env(
             "PROFILE",
-            if bcx.build_config.release {
-                "release"
-            } else {
-                "debug"
+            match unit.profile.root {
+                ProfileRoot::Release => "release",
+                ProfileRoot::Debug => "debug",
             },
         )
         .env("HOST", &bcx.host_triple())

src/cargo/core/compiler/job_queue.rs

@@ -20,6 +20,7 @@ use super::job::{
 use super::standard_lib;
 use super::timings::Timings;
 use super::{BuildContext, BuildPlan, CompileMode, Context, Unit};
+use crate::core::compiler::ProfileKind;
 use crate::core::{PackageId, TargetKind};
 use crate::handle_error;
 use crate::util;
@@ -41,10 +42,10 @@ pub struct JobQueue<'a, 'cfg> {
     compiled: HashSet<PackageId>,
     documented: HashSet<PackageId>,
     counts: HashMap<PackageId, usize>,
-    is_release: bool,
     progress: Progress<'cfg>,
     next_id: u32,
     timings: Timings<'a, 'cfg>,
+    profile_kind: ProfileKind,
 }
 
 pub struct JobState<'a> {
@@ -145,10 +146,10 @@ impl<'a, 'cfg> JobQueue<'a, 'cfg> {
             compiled: HashSet::new(),
             documented: HashSet::new(),
             counts: HashMap::new(),
-            is_release: bcx.build_config.release,
             progress,
             next_id: 0,
             timings,
+            profile_kind: bcx.build_config.profile_kind.clone(),
         }
     }
 
@@ -416,15 +417,15 @@ impl<'a, 'cfg> JobQueue<'a, 'cfg> {
         }
         self.progress.clear();
 
-        let build_type = if self.is_release { "release" } else { "dev" };
+        let build_type = self.profile_kind.name();
         // NOTE: this may be a bit inaccurate, since this may not display the
         // profile for what was actually built. Profile overrides can change
         // these settings, and in some cases different targets are built with
         // different profiles. To be accurate, it would need to collect a
         // list of Units built, and maybe display a list of the different
         // profiles used. However, to keep it simple and compatible with old
         // behavior, we just display what the base profile is.
-        let profile = cx.bcx.profiles.base_profile(self.is_release);
+        let profile = cx.bcx.profiles.base_profile(&self.profile_kind)?;
         let mut opt_type = String::from(if profile.opt_level.as_str() == "0" {
             "unoptimized"
         } else {