Add global expression "date"

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
docker · Aug 19, 2021 · 329239e · 329239e
1 parent a67f45c
commit 329239e
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diff --git a/README.md b/README.md
@@ -612,6 +612,7 @@ attributes are available:
 | `{{branch}}`             | `master`             |
 | `{{tag}}`                | `v1.2.3`             |
 | `{{sha}}`                | `90dd603`            |
+| `{{date 'YYYYMMDD'}}`    | `20210326`           |
 
 ```yaml
 tags: |

diff --git a/dist/index.js b/dist/index.js
diff --git a/src/meta.ts b/src/meta.ts
@@ -323,6 +323,7 @@ export class Meta {
 
   private setGlobalExp(val): string {
     const ctx = this.context;
+    const currentDate = this.date;
     return handlebars.compile(val)({
       branch: function () {
         if (!/^refs\/heads\//.test(ctx.ref)) {
@@ -338,6 +339,9 @@ export class Meta {
       },
       sha: function () {
         return ctx.sha.substr(0, 7);
+      },
+      date: function (format) {
+        return moment(currentDate).utc().format(format);
       }
     });
   }