update read-file example to use promises

maxkorp · maxkorp · commit 6d872496e16e · 2014-11-19T15:32:39.000-07:00
diff --git a/example/read-file.js b/example/read-file.js
@@ -1,27 +1,20 @@
-var git = require('../'),
+var nodegit = require('../'),
     path = require('path');
 
 // This example opens a certain file, `README.md`, at a particular commit,
 // and prints the first 10 lines as well as some metadata.
-
-git.Repo.open(path.resolve(__dirname, '../.git'), function(error, repo) {
-  if (error) throw error;
-
-  repo.getCommit('59b20b8d5c6ff8d09518454d4dd8b7b30f095ab5', function(error, commit) {
-    if (error) throw error;
-
-    commit.getEntry('README.md', function(error, entry) {
-      if (error) throw error;
-
-      entry.getBlob(function(error, blob) {
-        if (error) throw error;
-
-        console.log(entry.name(), entry.sha(), blob.size() + 'b');
-        console.log('========================================================\n\n');
-        var firstTenLines = blob.toString().split('\n').slice(0, 10).join('\n');
-        console.log(firstTenLines);
-        console.log('...');
-      });
-    });
-  });
-});
+var _entry;
+nodegit.Repository.open(path.resolve(__dirname, '../.git')).then(function(repo) {
+  return repo.getCommit('59b20b8d5c6ff8d09518454d4dd8b7b30f095ab5');
+}).then(function(commit) {
+  return commit.getEntry('README.md');
+}).then(function(entry) {
+  _entry = entry;
+  return _entry.getBlob();
+}).then(function(blob) {
+  console.log(_entry.filename(), _entry.sha(), blob.rawsize() + 'b');
+  console.log('========================================================\n\n');
+  var firstTenLines = blob.toString().split('\n').slice(0, 10).join('\n');
+  console.log(firstTenLines);
+  console.log('...');
+}).done();
