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With 'cargo build --build-plan', cargo does not actually run any commands, but instead prints out what it would have done in the form of a JSON data structure. Fixes rust-lang#3815
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| //! A graph-like structure used to represent the rustc commands to build the project and the | ||
| //! interdependencies between them. | ||
| //! | ||
| //! The BuildPlan structure is used to store the dependency graph of a dry run so that it can be | ||
| //! shared with an external build system. Each Module in the BuildPlan comprises a single | ||
| //! subprocess and defines the build environment, the outputs produced by the subprocess, and the | ||
| //! dependencies on other Modules. | ||
| use std::collections::{HashMap}; | ||
|
|
||
| use super::{Context, Unit}; | ||
| use super::context::TargetFileType; | ||
| use util::{internal, CargoResult, ProcessBuilder}; | ||
| use std::sync::Arc; | ||
| use std::path::PathBuf; | ||
| use serde_json; | ||
|
|
||
| #[derive(Debug, Serialize)] | ||
| struct Module { | ||
| deps: Vec<String>, | ||
| outputs: Vec<PathBuf>, | ||
| links: HashMap<PathBuf, PathBuf>, | ||
| program: String, | ||
| args: Vec<String>, | ||
| env: HashMap<String, String>, | ||
| cwd: String, | ||
| } | ||
|
|
||
| #[derive(Debug, Serialize)] | ||
| pub struct BuildPlan { | ||
| modules: HashMap<String, Module>, | ||
| } | ||
|
|
||
| impl Module { | ||
| pub fn new(deps: Vec<Unit>) -> Module { | ||
| Module { | ||
| deps: deps.iter().map(|dep| buildkey(dep)).collect(), | ||
| outputs: Vec::new(), | ||
| links: HashMap::new(), | ||
| program: String::new(), | ||
| args: Vec::new(), | ||
| env: HashMap::new(), | ||
| cwd: String::new(), | ||
| } | ||
| } | ||
|
|
||
| pub fn add_output(&mut self, path: &PathBuf, link: &Option<PathBuf>) { | ||
| self.outputs.push(path.clone()); | ||
| if link.is_some() { | ||
| self.links.insert(link.as_ref().unwrap().clone(), path.clone()); | ||
| } | ||
| } | ||
|
|
||
| pub fn update_cmd(&mut self, cmd: ProcessBuilder) { | ||
| self.program = cmd.get_program().to_str().expect("unicode program string required").to_string().clone(); | ||
| self.cwd = cmd.get_cwd().expect("cwd is required").to_str().expect("unicode cwd string required").to_string().clone(); | ||
| for arg in cmd.get_args().iter() { | ||
| self.args.push(arg.to_str().expect("unicode argument string required").to_string().clone()); | ||
| } | ||
| for (var, value) in cmd.get_envs() { | ||
| self.env.insert(var.clone(), value.as_ref().expect("environment value required").to_str().expect("unicode environment value required").to_string().clone()); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| pub fn buildkey(unit: &Unit) -> String { | ||
| format!("{} {} {} {:?}", unit.pkg, unit.target, unit.profile, unit.kind) | ||
| } | ||
|
|
||
| impl BuildPlan { | ||
| pub fn new() -> BuildPlan { | ||
| BuildPlan { | ||
| modules: HashMap::new(), | ||
| } | ||
| } | ||
|
|
||
| pub fn add(&mut self, | ||
| cx: &Context, | ||
| unit: &Unit, | ||
| ) -> CargoResult<()> { | ||
| let k = buildkey(unit); | ||
| let deps = cx.dep_targets(&unit)?; | ||
| let module = Module::new(deps); | ||
| self.modules.insert(k, module); | ||
| Ok(()) | ||
| } | ||
|
|
||
| pub fn update(&mut self, | ||
| module_name: String, | ||
| cmd: ProcessBuilder, | ||
| filenames: Arc<Vec<(PathBuf, Option<PathBuf>, TargetFileType)>>, | ||
| ) -> CargoResult<()> { | ||
| let module = self.modules.get_mut(&module_name).ok_or_else(|| { | ||
| internal(format!("couldn't find module for {}", module_name)) | ||
| })?; | ||
|
|
||
| module.update_cmd(cmd); | ||
| for &(ref dst, ref link_dst, _) in filenames.iter() { | ||
| module.add_output(dst, link_dst); | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
|
|
||
| pub fn output_plan(self) { | ||
| let encoded = serde_json::to_string_pretty(&self).unwrap(); | ||
| println!("{}", encoded); | ||
| } | ||
| } |
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