feat: 'from' and 'to' will be verified to be valid git commits

src/main.js

@@ -14,6 +14,7 @@ const XML_FILE_EXTENSION = 'xml'
 
 module.exports = config => {
   const cliHelper = new CLIHelper(config)
+  cliHelper.validateGitSha()
   cliHelper.validateConfig()
 
   const metadata = metadataManager.getDefinition(

src/utils/cliHelper.js

@@ -8,12 +8,33 @@ const git = require('git-state')
 const dirExist = dir => fs.existsSync(dir) && fs.statSync(dir).isDirectory()
 const fileExist = file => fs.statSync(file).isFile()
 
+const commitCheckParams = ['cat-file', 'commit']
+const childProcess = require('child_process')
+
 class CLIHelper {
   constructor(config) {
     this.config = config
     this.repoSetup = new RepoSetup(config)
   }
 
+  validateGitSha() {
+    const errors = []
+    ;['to', 'from'].forEach(field => {
+      const { status } = childProcess.spawnSync(
+        'git',
+        [...commitCheckParams, this.config[field]],
+        { cwd: this.config.repo }
+      )
+      if (status != 0) {
+        errors.push(`${field} ${this.config[field]} is not a valid commit`)
+      }
+    })
+
+    if (errors.length > 0) {
+      throw new Error(errors.join(', '))
+    }
+  }
+
   validateConfig() {
     this._sanitizeConfig()
     const errors = []