fetch git data from command line git

- added exec-sync package to execute git commands
- if a proper git hash is not passed, falls back to default values

1 files changed, 111 insertions, 0 deletions

diff --git a/lib/fetchGitData.js b/lib/fetchGitData.js
new file mode 100644
index 0000000..5f3e582
--- /dev/null
+++ b/lib/fetchGitData.js
@@ -0,0 +1,111 @@
+var exec = require("exec-sync");
+
+var fetchGitData = function(git) {
+
+  var i,
+      execGit = true,
+      head = {
+        "author_name": {
+          "format": "'%aN'",
+          "default": "Unknown Author"
+        },
+        "author_email": {
+          "format": "'%ae'",
+          "default": ""
+        },
+        "committer_name": {
+          "format": "'%cN'",
+          "default": "Unknown Committer"
+        },
+        "committer_email": {
+          "format": "'%ce'",
+          "default" :""
+        },
+        "message": {
+          "format": "'%s'",
+          "default": "Unknown Commit Message"
+        }
+      },
+      remotes = {};
+
+  function saveRemote(name, url, push) {
+    var key = name + "-" + url;
+    if ("undefined" === typeof push || "boolean" !== typeof push) {
+      push = true;
+    }
+    if (!remotes.hasOwnProperty(key)) {
+      remotes[key] = true;
+      if (push) {
+        git.remotes.push({
+          "name": name,
+          "url": url
+        });
+      }
+    }
+  }
+
+  //-- Set required properties of git if they weren"t provided
+  if (!git.hasOwnProperty("head")) {
+    git.head = {};
+  }
+  if (!git.hasOwnProperty("branch")) {
+    git.branch = "";
+  }
+  if (!git.hasOwnProperty("remotes")) {
+    git.remotes = [];
+  }
+
+  //-- Assert the property types
+  if ("object" !== typeof git.head) {
+    git.head = {};
+  }
+  if ("string" !== typeof git.branch) {
+    git.branch = "";
+  }
+  if (!git.remotes.hasOwnProperty("length")) {
+    git.remotes = [];
+  }
+
+  //-- Use git?
+  try {
+    exec("git log -1 " + git.head.id + " --pretty=format:'%H'");
+  } catch (e) {
+    execGit = false;
+  }
+
+  //-- Head
+  for (i in head) {
+    if (!git.head.hasOwnProperty(i)) {
+      if (execGit) {
+        git.head[i] = exec("git log -1 " + git.head.id + " --pretty=format:" + head[i].format);
+      } else {
+        git.head[i] = head[i].default;
+      }
+    }
+  }
+
+  if (execGit) {
+
+    //-- Branch
+    if ("" === git.branch.length) {
+      git.branch = exec("git branch").split("\n")[0].replace(/^\*\ /, "").trim();
+    }
+
+    //-- Remotes
+    if (0 !== git.remotes.length) {
+      for (i in git.remotes) {
+        saveRemote(git.remotes[i].name, git.remotes[i].url, false);
+      }
+    }
+    exec("git remote -v").split("\n").forEach(function(remote) {
+      remote = remote.split(/\s/);
+      saveRemote(remote[0], remote[1]);
+    });
+
+  }
+
+  return git;
+
+};
+
+module.exports = fetchGitData;