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@neerajt
Last active Sep 1, 2016
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`git log` in javascript
fs = require('fs');
// get and parse the HEAD
var HEAD = fs.readFileSync("./.git/HEAD").toString();
HEAD = HEAD.replace(/(\r\n|\n|\r)/gm,"");
HEAD = HEAD.split(": ")[1]
var HEADpath = fs.readFileSync('./.git/' + HEAD).toString().replace(/\n/, "");
// function to print pretty output
var exec = require('child_process').execSync;
printPretty = function(hash){
// make author pretty
pretty = exec("git cat-file -p " + hash).toString();
pretty = pretty.replace(/parent .*\n/,"");
pretty = pretty.replace(/tree .*\n/,"");
pretty = pretty.replace(/committer .*\n/,"");
pretty = pretty.replace(/author/, "Author:")
// make time pretty
time = pretty.split('\n')[0].replace(/Author: .*\> /, "");
time = new Date(time.split(' ')[0] * 1000)
date = time.toDateString();
time = time.toTimeString();
pretty = pretty.replace(/\> .*\n/g,"\>\n");
//make message pretty
message = pretty.split('\n').slice(-2, -1)[0];
pretty = pretty.replace(message, " " + message);
// color commit line
console.log('\x1b[33m%s\x1b[0m', "commit " + hash);
console.log("Date: " + date + " " + time);
console.log(pretty);
}
// recursive function to traverse tree
// follows `parent` until `parent`
// is no longer found
getParent = function(hash){
re = new RegExp('parent');
var commit = exec("git cat-file -p " + hash).toString();
parent = commit.split("\n")[1];
if(re.test(parent)){
parent = parent.split(" ")[1];
printPretty(hash);
getParent(parent);
}
else{
printPretty(hash);
}
}
// run
getParent(HEADpath);
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