Fix bug updating tags not triggering preset rerun

lib/versioned-map.js

@@ -36,6 +36,7 @@ class VersionedMap {
     this._sizeDiff = [0];
     this._revision = 0;
     this.map = new Map();
+    this.dirty = 0;
   }
 
 
@@ -100,6 +101,7 @@ class VersionedMap {
 
     var v = this.map.get(key);
     if (!v) {
+      this.dirty |= 1 << rev;
       for (let i = 0; i < rev; ++ i)
         this._sizeDiff[i] -= 1;
 
@@ -118,6 +120,7 @@ class VersionedMap {
         throw new Error('Cannot modify old revisions');
     }
 
+    this.dirty |= 1 << rev;
     if (old === NONEXISTENT)
       ++ this._sizeDiff[rev];
 
@@ -140,6 +143,7 @@ class VersionedMap {
     if (old === NONEXISTENT)
       return false;
 
+    this.dirty |= 1 << rev;
     -- this._sizeDiff[rev];
     v[rev] = NONEXISTENT;
 
@@ -177,6 +181,7 @@ class VersionedMap {
         for (let i = this._sizeDiff.length; i <= r; ++ i)
           this._sizeDiff[i] = this._sizeDiff[i - 1];
 
+        this.dirty |= 1 << r;
         rev[r] = revisions[k];
       }
     }
@@ -184,6 +189,8 @@ class VersionedMap {
     for (let i = 0; i < minKey; ++ i)
       -- this._sizeDiff[i];
 
+    this.dirty |= del;
+
     for (let i = 0; del > 0; del >>= 1, ++ i)
       if (del & 1)
         rev[i] = NONEXISTENT;
@@ -233,6 +240,10 @@ class VersionedMap {
     this._sizeDiff[revision] = this._sizeDiff[this._sizeDiff.length - 1];
     this._sizeDiff.splice(revision + 1, this._sizeDiff.length);
 
+    let d = this.dirty >> revision;
+    this.dirty = this.dirty ^ (d << revision);
+    this.dirty |= (+!!d) << revision;
+
     for (let pair of this.map) {
       let k = pair[0];
       let v = pair[1];