incremental static generation and regeneration support in build manifest (#14365)

The icon is just something I thought might look good, can certainly be changed.
I've currently added incremental static generation support

Edit: Updated screenshot after 8037981
![Screenshot 2020-08-04 at 1 51 14 PM](https://user-images.githubusercontent.com/11258286/89270960-afe9f400-d659-11ea-8f18-197dc53b8beb.png)





Fixes: #14204

packages/next/build/index.ts

@@ -592,6 +592,7 @@ export default async function build(
         isHybridAmp,
         ssgPageRoutes,
         hasSsgFallback,
+        initialRevalidateSeconds: false,
       })
     })
   )
@@ -832,6 +833,13 @@ export default async function build(
             srcRoute: null,
             dataRoute: path.posix.join('/_next/data', buildId, `${file}.json`),
           }
+          // Set Page Revalidation Interval
+          const pageInfo = pageInfos.get(page)
+          if (pageInfo) {
+            pageInfo.initialRevalidateSeconds =
+              exportConfig.initialPageRevalidationMap[page]
+            pageInfos.set(page, pageInfo)
+          }
         } else {
           // For a dynamic SSG page, we did not copy its data exports and only
           // copy the fallback HTML file (if present).
@@ -859,6 +867,14 @@ export default async function build(
                 `${normalizePagePath(route)}.json`
               ),
             }
+
+            // Set route Revalidation Interval
+            const pageInfo = pageInfos.get(route)
+            if (pageInfo) {
+              pageInfo.initialRevalidateSeconds =
+                exportConfig.initialPageRevalidationMap[route]
+              pageInfos.set(route, pageInfo)
+            }
           }
         }
       }

packages/next/build/utils.ts

@@ -52,6 +52,7 @@ export interface PageInfo {
   isSsg: boolean
   ssgPageRoutes: string[] | null
   hasSsgFallback: boolean
+  initialRevalidateSeconds: number | false
 }
 
 export async function printTreeView(
@@ -153,7 +154,11 @@ export async function printTreeView(
           : pageInfo?.isSsg
           ? '●'
           : 'λ'
-      } ${item}`,
+      } ${
+        pageInfo?.initialRevalidateSeconds
+          ? `${item} (ISR: ${pageInfo?.initialRevalidateSeconds} Seconds)`
+          : item
+      }`,
       pageInfo
         ? ampFirst
           ? chalk.cyan('AMP')
@@ -271,6 +276,13 @@ export async function printTreeView(
             'getStaticProps'
           )})`,
         ],
+        [
+          '',
+          '(ISR)',
+          `incremental static regeneration (uses revalidate in ${chalk.cyan(
+            'getStaticProps'
+          )})`,
+        ],
       ] as [string, string, string][],
       {
         align: ['l', 'l', 'l'],