feat: add has-message script, close #40

Author: bahmutov

.travis.yml

@@ -10,13 +10,17 @@ script:
   # check syntax of the script
   - node --check bin/commit-message-install.js
   - node --check bin/commit-message-run.js
+  - node --check bin/has-commit-message.js
   - node --check .
   - npm test
   - DEBUG=commit-message-install node ./bin/commit-message-install.js
   - DEBUG=commit-message-install node ./bin/commit-message-install.js --else "echo --else is working"
   # synthetic test case
   - DEBUG=commit-message-install node ./bin/commit-message-install.js -f test/message.txt
   - npm run demo
+  # demo test has-commit-message
+  - ./bin/has-commit-message.js -f test/message.txt
+
 after_success:
   - npm run semantic-release
 branches:

README.md

@@ -119,6 +119,19 @@ $(npm bin)/set-status --label "context label" --state success --description "sho
 
 State can be "error", "pending", "failure" or "success". `--label` is optional, if not set, then the platform and the package name will be used.
 
+### Has commit message
+
+You can use script `has-message` to check if the last or a specific commit has JSON commit information block
+
+```text
+$(npm bin)/has-message
+$(npm bin)/has-message --sha f81a00
+```
+
+If there is a message in the commit's body the script will exit with code 0. Otherwise it will exit with code 1.
+
+See [commit-message-install-example](https://github.com/bahmutov/commit-message-install-example) repo for an example.
+
 ## API
 
 ### getJsonFromGit

package.json

@@ -8,7 +8,8 @@
     "commit-message-install": "bin/commit-message-install.js",
     "cmi": "bin/commit-message-install.js",
     "run-if": "bin/commit-message-run.js",
-    "set-status": "bin/set-commit-status.js"
+    "set-status": "bin/set-commit-status.js",
+    "has-message": "bin/has-commit-message.js"
   },
   "config": {
     "pre-git": {