Move library crates under 'lib/'.

Give these crates each a more standard directory layout with sources in
a 'src' sub-sirectory and Cargo.toml in the top lib/foo directory.

Add license and description fields to each.

The build script for the cretonne crate now lives in
'lib/cretonne/build.rs' separating it from the normal library sources
under 'lib/cretonne/src'.

lib/cretonne/Cargo.toml

@@ -3,6 +3,7 @@ authors = ["The Cretonne Project Developers"]
 name = "cretonne"
 version = "0.0.0"
 description = "Low-level code generator library"
+license = "Apache-2.0"
 documentation = "https://cretonne.readthedocs.io/"
 repository = "https://github.com/stoklund/cretonne"
 publish = false
@@ -10,10 +11,9 @@ build = "build.rs"
 
 [lib]
 name = "cretonne"
-path = "lib.rs"
 
 [dependencies]
 # It is a goal of the cretonne crate to have minimal external dependencies.
 # Please don't add any unless they are essential to the task of creating binary
 # machine code. Integration tests that need external dependencies can be
-# accomodated in src/tools/tests.
+# accomodated in `tests`.

lib/cretonne/build.rs

@@ -0,0 +1,41 @@
+// Build script.
+//
+// This program is run by Cargo when building lib/cretonne. It is used to generate Rust code from
+// the language definitions in the lib/cretonne/meta directory.
+//
+// Environment:
+//
+// OUT_DIR
+//     Directory where generated files should be placed.
+//
+// The build script expects to be run from the directory where this build.rs file lives. The
+// current directory is used to find the sources.
+
+
+use std::env;
+use std::process;
+
+fn main() {
+    let out_dir = env::var("OUT_DIR").expect("The OUT_DIR environment variable must be set");
+
+    println!("Build script generating files in {}", out_dir);
+
+    let cur_dir = env::current_dir().expect("Can't access current working directory");
+    let crate_dir = cur_dir.as_path();
+
+    // Scripts are in `$crate_dir/meta`.
+    let meta_dir = crate_dir.join("meta");
+    let build_script = meta_dir.join("build.py");
+
+    // Launch build script with Python. We'll just find python in the path.
+    let status = process::Command::new("python")
+        .current_dir(crate_dir)
+        .arg(build_script)
+        .arg("--out-dir")
+        .arg(out_dir)
+        .status()
+        .expect("Failed to launch second-level build script");
+    if !status.success() {
+        process::exit(status.code().unwrap());
+    }
+}

lib/filecheck/Cargo.toml

@@ -2,11 +2,13 @@
 authors = ["The Cretonne Project Developers"]
 name = "filecheck"
 version = "0.0.0"
+description = "Library for matching test outputs against filecheck directives"
+license = "Apache-2.0"
+repository = "https://github.com/stoklund/cretonne"
 publish = false
 
 [lib]
 name = "filecheck"
-path = "lib.rs"
 
 [dependencies]
 regex = "0.1.71"

lib/reader/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+authors = ["The Cretonne Project Developers"]
+name = "cretonne-reader"
+version = "0.0.0"
+description = "Cretonne textual IL reader"
+license = "Apache-2.0"
+documentation = "https://cretonne.readthedocs.io/"
+repository = "https://github.com/stoklund/cretonne"
+publish = false
+
+[lib]
+name = "cton_reader"
+
+[dependencies]
+cretonne = { path = "../cretonne" }

src/libcretonne/build.rs

@@ -1,46 +0,0 @@
-
-// Build script.
-//
-// This program is run by Cargo when building libcretonne. It is used to generate Rust code from
-// the language definitions in the meta directory.
-//
-// Environment:
-//
-// OUT_DIR
-//     Directory where generated files should be placed.
-//
-// The build script expects to be run from the directory where this build.rs file lives. The
-// current directory is used to find the sources.
-
-
-use std::env;
-use std::process;
-
-fn main() {
-    let out_dir = env::var("OUT_DIR").expect("The OUT_DIR environment variable must be set");
-
-    println!("Build script generating files in {}", out_dir);
-
-    let mut cur_dir = env::current_dir().expect("Can't access current working directory");
-
-    // We're in src/libcretonne. Find the top-level directory.
-    assert!(cur_dir.pop(), "No parent 'src' directory");
-    assert!(cur_dir.pop(), "No top-level directory");
-    let top_dir = cur_dir.as_path();
-
-    // Scripts are in $top_dir/meta.
-    let meta_dir = top_dir.join("lib/cretonne/meta");
-    let build_script = meta_dir.join("build.py");
-
-    // Launch build script with Python. We'll just find python in the path.
-    let status = process::Command::new("python")
-                     .current_dir(top_dir)
-                     .arg(build_script)
-                     .arg("--out-dir")
-                     .arg(out_dir)
-                     .status()
-                     .expect("Failed to launch second-level build script");
-    if !status.success() {
-        process::exit(status.code().unwrap());
-    }
-}

src/libreader/Cargo.toml

@@ -1,12 +0,0 @@
-[package]
-authors = ["The Cretonne Project Developers"]
-name = "cretonne-reader"
-version = "0.0.0"
-publish = false
-
-[lib]
-name = "cton_reader"
-path = "lib.rs"
-
-[dependencies]
-cretonne = { path = "../libcretonne" }

src/tools/Cargo.toml

@@ -10,9 +10,9 @@ name = "cton-util"
 path = "main.rs"
 
 [dependencies]
-cretonne = { path = "../libcretonne" }
-cretonne-reader = { path = "../libreader" }
-filecheck = { path = "../libfilecheck" }
+cretonne = { path = "../../lib/cretonne" }
+cretonne-reader = { path = "../../lib/reader" }
+filecheck = { path = "../../lib/filecheck" }
 docopt = "0.6.80"
 rustc-serialize = "0.3.19"
 num_cpus = "1.1.0"