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Add an option to print the status of incremental tasks / dep nodes after running them #58365

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merged 1 commit into from
Feb 14, 2019
Merged

Add an option to print the status of incremental tasks / dep nodes after running them #58365

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15 changes: 15 additions & 0 deletions src/librustc/dep_graph/graph.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -292,17 +292,28 @@ impl DepGraph {
task_deps.map(|lock| lock.into_inner()),
);

let print_status = cfg!(debug_assertions) && hcx.sess().opts.debugging_opts.dep_tasks;

// Determine the color of the new DepNode.
if let Some(prev_index) = data.previous.node_to_index_opt(&key) {
let prev_fingerprint = data.previous.fingerprint_by_index(prev_index);

let color = if let Some(current_fingerprint) = current_fingerprint {
if current_fingerprint == prev_fingerprint {
if print_status {
eprintln!("[task::green] {:?}", key);
}
DepNodeColor::Green(dep_node_index)
} else {
if print_status {
eprintln!("[task::red] {:?}", key);
}
DepNodeColor::Red
}
} else {
if print_status {
eprintln!("[task::unknown] {:?}", key);
}
// Mark the node as Red if we can't hash the result
DepNodeColor::Red
};
Expand All @@ -312,6 +323,10 @@ impl DepGraph {
insertion for {:?}", key);

data.colors.insert(prev_index, color);
} else {
if print_status {
eprintln!("[task::new] {:?}", key);
}
}

(result, dep_node_index)
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2 changes: 2 additions & 0 deletions src/librustc/session/config.rs
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Expand Up @@ -1233,6 +1233,8 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
"show extended diagnostic help"),
continue_parse_after_error: bool = (false, parse_bool, [TRACKED],
"attempt to recover from parse errors (experimental)"),
dep_tasks: bool = (false, parse_bool, [UNTRACKED],
"print tasks that execute and the color their dep node gets (requires debug build)"),
incremental: Option<String> = (None, parse_opt_string, [UNTRACKED],
"enable incremental compilation (experimental)"),
incremental_queries: bool = (true, parse_bool, [UNTRACKED],
Expand Down