Merge pull request #29 from tock/metadata-updates

Add flags to TAB metadata.toml file

README.md

@@ -35,6 +35,7 @@ OPTIONS:
         --read_ids <read_ids>...                           Storage IDs that this app is allowed to read
         --stack <stack-size>                               in bytes [default: 2048]
         --write_id <write_id>                              A storage ID used for writing data
+        --supported-boards <supported-boards>              Comma separated list of boards this app is compatible with
 
 ARGS:
     <elf[,architecture]>...    application file(s) to package

src/cmdline.rs

@@ -172,6 +172,13 @@ pub struct Opt {
         help = "The minimum kernel minor version that the app requires"
     )]
     pub kernel_minor: Option<u16>,
+
+    #[structopt(
+        long = "supported-boards",
+        name = "supported-boards",
+        help = "comma separated list of boards this app is compatible with"
+    )]
+    pub supported_boards: Option<String>,
 }
 
 mod test {

src/main.rs

@@ -10,6 +10,7 @@ use elf2tab::convert;
 fn main() {
     let opt = cmdline::Opt::from_args();
 
+    // Get app name from command line arguments or use empty string as default.
     let package_name = opt
         .package_name
         .as_ref()
@@ -31,8 +32,6 @@ fn main() {
     writeln!(&mut metadata_toml, "tab-version = 1").unwrap();
     // Name is always set by elf2tab (even if it is empty).
     writeln!(&mut metadata_toml, "name = \"{}\"", package_name).unwrap();
-    // We don't currently tell elf2tab if this app only runs on certain boards.
-    writeln!(&mut metadata_toml, "only-for-boards = \"\"").unwrap();
     // Include "minimum-tock-kernel-version" key if a necessary kernel version
     // was specified.
     minimum_tock_kernel_version.map(|(major, minor)| {
@@ -43,6 +42,15 @@ fn main() {
         )
         .unwrap();
     });
+    // Include "only-for-boards" key if specific boards were specified.
+    opt.supported_boards.as_ref().map(|supported_boards| {
+        writeln!(
+            &mut metadata_toml,
+            "only-for-boards = \"{}\"",
+            supported_boards.as_str()
+        )
+        .unwrap();
+    });
     // Add build-date metadata unless a deterministic build is desired.
     if !opt.deterministic {
         let build_date = chrono::Utc::now().to_rfc3339_opts(chrono::SecondsFormat::Secs, true);