Allow skipping message body check (#97)

Some organizations prefer to use only a subject
line, usually referring to the pull request, as
it provides the full context for the change.

Other reasons for using a subject line-only
include incompatibility with automatic PR bots,
like Renovate. Besides this, most teams today use
some UI to read the PR's message body
(i.e., GitHub), so restricting what can be added
to a PR message can lead to a poor
user experience.

Signed-off-by: Marcos Passos <[email protected]>

README.md

@@ -149,7 +149,7 @@ and more verbose body for an informative Git history. However, this might be
 too rigid for certain projects.
 
 You can allow one-liner commit messages by setting the flag `allow-one-liners`:
-
+ 
 ```yaml
     steps:
       - name: Check
@@ -158,6 +158,22 @@ You can allow one-liner commit messages by setting the flag `allow-one-liners`:
           allow-one-liners: 'true'
 ```
 
+## Skip Body Check
+
+For some repositories only the subject matters while the body is allowed to be free-form.
+For example, this is the case when the body of the commit is automatically generated (*e.g.*, by a third-party service that we do not control).
+In such situations, we want check the subject line, but ignore the body in the checks.
+
+You can disable checking the body by setting the flag `skip-body-check`:
+
+```yaml
+    steps:
+      - name: Check
+        uses: mristin/opinionated-commit-message@v2
+        with:
+          skip-body-check: 'true'
+```
+
 ## Enforce Sign-off
 
 Most projects do not require a sign-off on the commits.

action.yml

@@ -24,3 +24,7 @@ inputs:
     description: 'If set to "true", signed-off-by is required in the commit message body'
     required: false
     default: ''
+  skip-body-check:
+    description: 'If set to "true", skip the body check'
+    required: false
+    default: ''