Handle `rustpkg build`, etc. when given no args properly

`rustpkg build` et al were only checking one directory up to see if it
was in a dir named "src". Ditch that entirely and instead check if the
cwd is descended from any of the workspace paths. Besides being more
intelligent about whether or not something is a workspace, this also
allows for package ids composed of multiple path components.

src/librustpkg/rustpkg.rs

@@ -43,7 +43,7 @@
 use path_util::{built_executable_in_workspace, built_library_in_workspace, default_workspace};
 use path_util::{target_executable_in_workspace, target_library_in_workspace};
 use source_control::is_git_dir;
-use workspace::{each_pkg_parent_workspace, pkg_parent_workspaces, in_workspace, cwd_to_workspace};
+use workspace::{each_pkg_parent_workspace, pkg_parent_workspaces, cwd_to_workspace};
 use context::Ctx;
 use package_id::PkgId;
 use package_source::PkgSrc;
@@ -190,11 +190,10 @@ fn run(&self, cmd: &str, args: ~[~str]) {
         match cmd {
             "build" => {
                 if args.len() < 1 {
-                    if !in_workspace(|| { usage::build() } ) {
-                        return;
+                    match cwd_to_workspace() {
+                        None => { usage::build(); return }
+                        Some((ws, pkgid)) => self.build(&ws, &pkgid)
                     }
-                    let (workspace, pkgid) = cwd_to_workspace();
-                    self.build(&workspace, &pkgid);
                 }
                 else {
                     // The package id is presumed to be the first command-line
@@ -210,13 +209,12 @@ fn run(&self, cmd: &str, args: ~[~str]) {
             }
             "clean" => {
                 if args.len() < 1 {
-                    if !in_workspace(|| { usage::clean() } ) {
-                        return;
+                    match cwd_to_workspace() {
+                        None => { usage::clean(); return }
+                        // tjc: Maybe clean should clean all the packages in the
+                        // current workspace, though?
+                        Some((ws, pkgid)) => self.clean(&ws, &pkgid)
                     }
-                    // tjc: Maybe clean should clean all the packages in the
-                    // current workspace, though?
-                    let (workspace, pkgid) = cwd_to_workspace();
-                    self.clean(&workspace, &pkgid);
 
                 }
                 else {
@@ -239,11 +237,10 @@ fn run(&self, cmd: &str, args: ~[~str]) {
             }
             "install" => {
                 if args.len() < 1 {
-                    if !in_workspace(|| { usage::install() }) {
-                        return;
+                    match cwd_to_workspace() {
+                        None => { usage::install(); return }
+                        Some((ws, pkgid)) => self.install(&ws, &pkgid)
                     }
-                    let (workspace, pkgid) = cwd_to_workspace();
-                    self.install(&workspace, &pkgid);
                 }
                 else {
                     // The package id is presumed to be the first command-line

src/librustpkg/tests.rs

@@ -695,7 +695,8 @@ fn package_script_with_default_build() {
 
 #[test]
 fn rustpkg_build_no_arg() {
-    let tmp = mkdtemp(&os::tmpdir(), "rustpkg_build_no_arg").expect("rustpkg_build_no_arg failed");
+    let tmp = mkdtemp(&os::tmpdir(), "rustpkg_build_no_arg").expect("rustpkg_build_no_arg failed")
+              .push(".rust");
     let package_dir = tmp.push("src").push("foo");
     assert!(os::mkdir_recursive(&package_dir, U_RWX));
 
@@ -709,7 +710,8 @@ fn rustpkg_build_no_arg() {
 #[test]
 fn rustpkg_install_no_arg() {
     let tmp = mkdtemp(&os::tmpdir(),
-                      "rustpkg_install_no_arg").expect("rustpkg_install_no_arg failed");
+                      "rustpkg_install_no_arg").expect("rustpkg_install_no_arg failed")
+              .push(".rust");
     let package_dir = tmp.push("src").push("foo");
     assert!(os::mkdir_recursive(&package_dir, U_RWX));
     writeFile(&package_dir.push("lib.rs"),
@@ -721,7 +723,8 @@ fn rustpkg_install_no_arg() {
 
 #[test]
 fn rustpkg_clean_no_arg() {
-    let tmp = mkdtemp(&os::tmpdir(), "rustpkg_clean_no_arg").expect("rustpkg_clean_no_arg failed");
+    let tmp = mkdtemp(&os::tmpdir(), "rustpkg_clean_no_arg").expect("rustpkg_clean_no_arg failed")
+              .push(".rust");
     let package_dir = tmp.push("src").push("foo");
     assert!(os::mkdir_recursive(&package_dir, U_RWX));
 

src/librustpkg/workspace.rs

@@ -10,12 +10,12 @@
 
 // rustpkg utilities having to do with workspaces
 
-use std::os;
+use std::{os,util};
 use std::path::Path;
 use path_util::workspace_contains_package_id;
 use package_id::PkgId;
 
-use rustc::metadata::filesearch::rust_path;
+use path_util::rust_path;
 
 pub fn each_pkg_parent_workspace(pkgid: &PkgId, action: &fn(&Path) -> bool) -> bool {
     // Using the RUST_PATH, find workspaces that contain
@@ -42,23 +42,22 @@ pub fn pkg_parent_workspaces(pkgid: &PkgId) -> ~[Path] {
         .collect()
 }
 
-pub fn in_workspace(complain: &fn()) -> bool {
-    let dir_part = os::getcwd().pop().components.clone();
-    if  *(dir_part.last()) != ~"src" {
-        complain();
-        false
-    }
-    else {
-        true
-    }
-}
-
 /// Construct a workspace and package-ID name based on the current directory.
 /// This gets used when rustpkg gets invoked without a package-ID argument.
-pub fn cwd_to_workspace() -> (Path, PkgId) {
+pub fn cwd_to_workspace() -> Option<(Path, PkgId)> {
     let cwd = os::getcwd();
-    let ws = cwd.pop().pop();
-    let cwd_ = cwd.clone();
-    let pkgid = cwd_.components.last().to_str();
-    (ws, PkgId::new(pkgid))
+    for path in rust_path().move_iter() {
+        let srcpath = path.push("src");
+        if srcpath.is_ancestor_of(&cwd) {
+            // I'd love to use srcpath.get_relative_to(cwd) but it behaves wrong
+            // I'd say broken, but it has tests enforcing the wrong behavior.
+            // instead, just hack up the components vec
+            let mut pkgid = cwd;
+            pkgid.is_absolute = false;
+            let comps = util::replace(&mut pkgid.components, ~[]);
+            pkgid.components = comps.move_iter().skip(srcpath.components.len()).collect();
+            return Some((path, PkgId::new(pkgid.components.connect("/"))))
+        }
+    }
+    None
 }