log cache status

Author: mbostock

src/dataloader.ts

@@ -89,7 +89,9 @@ export class Loader {
         const cachePath = join(this.sourceRoot, outputPath);
         const loaderStat = await maybeStat(this.path);
         const cacheStat = await maybeStat(cachePath);
-        if (cacheStat && cacheStat.mtimeMs > loaderStat!.mtimeMs) return outputPath;
+        if (!cacheStat) verbose && process.stdout.write(faint("[missing] "));
+        else if (cacheStat.mtimeMs < loaderStat!.mtimeMs) verbose && process.stdout.write(faint("[stale] "));
+        else return verbose && process.stdout.write(faint("[fresh] ")), outputPath;
         const tempPath = join(this.sourceRoot, ".observablehq", "cache", `${this.targetPath}.${process.pid}`);
         await prepareOutput(tempPath);
         const tempFd = await open(tempPath, "w");
@@ -131,6 +133,7 @@ export class Loader {
   }
 }
 
+const faint = color(2);
 const red = color(31);
 const green = color(32);
 const yellow = color(33);