Add format attribute for type=sha

README.md

@@ -528,13 +528,21 @@ tags: |
   type=sha
 ```
 
-Output Git short commit as Docker tag like `sha-ad132f5`.
+```yaml
+tags: |
+  # minimal using short sha
+  type=sha
+  # full length sha
+  type=sha,format=long
+```
+
+Output Git short commit (or long if specified) as Docker tag like `sha-ad132f5`.
 
 Extended attributes and default values:
 
 ```yaml
 tags: |
-  type=sha,enable=true,priority=100,prefix=sha-,suffix=
+  type=sha,enable=true,priority=100,prefix=sha-,suffix=,format=short
 ```
 
 ## Notes

__tests__/meta.test.ts

@@ -617,7 +617,39 @@ describe('push', () => {
         "org.opencontainers.image.revision=90dd6032fac8bda1b6c4436a2e65de27961ed071",
         "org.opencontainers.image.licenses=MIT"
       ]
-    ]
+    ],
+    [
+      'push18',
+        'event_push.env',
+        {
+          images: ['org/app', 'ghcr.io/user/app'],
+          tags: [
+            `type=ref,event=branch`,
+            `type=sha,format=long`
+          ],
+        } as Inputs,
+        {
+          main: 'dev',
+          partial: ['sha-90dd6032fac8bda1b6c4436a2e65de27961ed071'],
+          latest: false
+        } as Version,
+        [
+          'org/app:dev',
+          'org/app:sha-90dd6032fac8bda1b6c4436a2e65de27961ed071',
+          'ghcr.io/user/app:dev',
+          'ghcr.io/user/app:sha-90dd6032fac8bda1b6c4436a2e65de27961ed071'
+        ],
+        [
+          "org.opencontainers.image.title=Hello-World",
+          "org.opencontainers.image.description=This your first repo!",
+          "org.opencontainers.image.url=https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.source=https://github.com/octocat/Hello-World",
+          "org.opencontainers.image.version=dev",
+          "org.opencontainers.image.created=2020-01-10T00:30:00.000Z",
+          "org.opencontainers.image.revision=90dd6032fac8bda1b6c4436a2e65de27961ed071",
+          "org.opencontainers.image.licenses=MIT"
+        ]
+      ],
   ])('given %p with %p event', tagsLabelsTest);
 });
 

__tests__/tag.test.ts

@@ -1,4 +1,4 @@
-import {Transform, Parse, Tag, Type, RefEvent, DefaultPriorities} from '../src/tag';
+import {Transform, Parse, Tag, Type, RefEvent, ShaFormat, DefaultPriorities} from '../src/tag';
 
 describe('transform', () => {
   // prettier-ignore
@@ -89,7 +89,8 @@ describe('transform', () => {
           attrs: {
             "priority": DefaultPriorities[Type.Sha],
             "enable": "true",
-            "prefix": "sha-"
+            "prefix": "sha-",
+            "format": ShaFormat.Short
           }
         }
       ] as Tag[],
@@ -355,7 +356,21 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "true",
-          "prefix": "sha-"
+          "prefix": "sha-",
+          "format": ShaFormat.Short
+        }
+      } as Tag,
+      false
+    ],
+    [
+      `type=sha,format=long`,
+      {
+        type: Type.Sha,
+        attrs: {
+          "priority": DefaultPriorities[Type.Sha],
+          "enable": "true",
+          "prefix": "sha-",
+          "format": ShaFormat.Long
         }
       } as Tag,
       false
@@ -367,7 +382,8 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "true",
-          "prefix": ""
+          "prefix": "",
+          "format": ShaFormat.Short
         }
       } as Tag,
       false
@@ -379,7 +395,8 @@ describe('parse', () => {
         attrs: {
           "priority": DefaultPriorities[Type.Sha],
           "enable": "false",
-          "prefix": "sha-"
+          "prefix": "sha-",
+          "format": ShaFormat.Short
         }
       } as Tag,
       false
@@ -403,6 +420,11 @@ describe('parse', () => {
       `type=sha,enable=foo`,
       {} as Tag,
       true
+    ],
+    [
+      `type=sha,format=foo`,
+      {} as Tag,
+      true
     ]
   ])('given %p event ', async (s: string, expected: Tag, invalid: boolean) => {
     try {

src/meta.ts

@@ -224,7 +224,13 @@ export class Meta {
     if (!this.context.sha) {
       return version;
     }
-    const vraw = this.setValue(this.context.sha.substr(0, 7), tag);
+
+    let val = this.context.sha;
+    if (tag.attrs['format'] === tcl.ShaFormat.Short) {
+      val = this.context.sha.substr(0, 7);
+    }
+
+    const vraw = this.setValue(val, tag);
     return Meta.setVersion(version, vraw, this.flavor.latest == 'auto' ? false : this.flavor.latest == 'true');
   }
 

src/tag.ts

@@ -17,6 +17,11 @@ export enum RefEvent {
   PR = 'pr'
 }
 
+export enum ShaFormat {
+  Short = 'short',
+  Long = 'long'
+}
+
 export class Tag {
   public type?: Type;
   public attrs: Record<string, string>;
@@ -175,6 +180,16 @@ export function Parse(s: string): Tag {
       if (!tag.attrs.hasOwnProperty('prefix')) {
         tag.attrs['prefix'] = 'sha-';
       }
+      if (!tag.attrs.hasOwnProperty('format')) {
+        tag.attrs['format'] = ShaFormat.Short;
+      }
+      if (
+        !Object.keys(ShaFormat)
+          .map(k => ShaFormat[k])
+          .includes(tag.attrs['format'])
+      ) {
+        throw new Error(`Invalid format for ${s}`);
+      }
       break;
     }
   }