Add hide_success and hide_progress options

src/graph.rs

@@ -174,6 +174,11 @@ pub struct Build {
 
     /// Output files.
     pub outs: BuildOuts,
+
+    /// True if output of command should be hidden on successful completion.
+    pub hide_success: bool,
+    /// True if last line of output should not be shown in status.
+    pub hide_last_line: bool,
 }
 impl Build {
     pub fn new(loc: FileLoc, ins: BuildIns, outs: BuildOuts) -> Self {
@@ -188,6 +193,8 @@ impl Build {
             ins,
             discovered_ins: Vec::new(),
             outs,
+            hide_success: false,
+            hide_last_line: false,
         }
     }
 

src/load.rs

@@ -158,13 +158,17 @@ impl Loader {
             }),
             _ => bail!("rspfile and rspfile_content need to be both specified"),
         };
+        let hide_success = lookup("hide_success").as_deref() == Some("1");
+        let hide_last_line = lookup("hide_last_line").as_deref() == Some("1");
 
         build.cmdline = cmdline;
         build.desc = desc;
         build.depfile = depfile;
         build.parse_showincludes = parse_showincludes;
         build.rspfile = rspfile;
         build.pool = pool;
+        build.hide_success = hide_success;
+        build.hide_last_line = hide_last_line;
 
         self.graph.add_build(build)
     }

src/parse.rs

@@ -157,6 +157,8 @@ impl<'text> Parser<'text> {
                     | "rspfile"
                     | "rspfile_content"
                     | "msvc_deps_prefix"
+                    | "hide_success"
+                    | "hide_last_line"
             )
         })?;
         Ok(Rule { name, vars })

src/progress_fancy.rs

@@ -180,7 +180,7 @@ impl FancyState {
         // Show task name, status, and output.
         let buf = &mut self.pending;
         match result.termination {
-            Termination::Success if result.output.is_empty() => {
+            Termination::Success if result.output.is_empty() || build.hide_success => {
                 // Common case: don't show anything.
                 return;
             }

src/task.rs

@@ -215,6 +215,7 @@ impl Runner {
         let depfile = build.depfile.clone().map(PathBuf::from);
         let rspfile = build.rspfile.clone();
         let parse_showincludes = build.parse_showincludes;
+        let hide_last_line = build.hide_last_line;
 
         let tid = self.tids.claim();
         let tx = self.tx.clone();
@@ -226,7 +227,9 @@ impl Runner {
                 parse_showincludes,
                 rspfile.as_ref(),
                 |line| {
-                    let _ = tx.send(Message::Output((id, line.to_owned())));
+                    if !hide_last_line {
+                        let _ = tx.send(Message::Output((id, line.to_owned())));
+                    }
                 },
             )
             .unwrap_or_else(|err| TaskResult {