Mercurial

Mercurial is a free, distributed source control management tool. It efficiently handles projects of any size and offers an easy and intuitive interface.

• http://academy.cba.mit.edu/content/tutorials/02_Project_Management/mercurial_install_ubuntu.html
• http://academy.cba.mit.edu/content/tutorials/02_Project_Management/mercurial_basics_and_resources.html
• http://academy.cba.mit.edu/content/tutorials/02_Project_Management/mercurial_troubleshooting.html
• http://mercurial.selenic.com/
• http://academy.cba.mit.edu/classes/project_management/archive.html

• http://fab.cba.mit.edu/classes/MIT/863.10/people/kenny.cheung/hgNotes.html, which this is mostly built on.

Mercurial on Ubuntu

Step 1: Install

Install .ssh

 sudo apt-get install ssh

Download the academy and academy.pub files to your .ssh folder.

Linux packages

sudo apt-get install mercurial tortoisehg tortoisehg-nautilus  

install Mercurial

sudo apt-get install mercurial

Step 2: Key files

put key files (academy and academy.pub) somewhere, probably in ~/.ssh/keys/ (you might want to create this keys directory) note that directories that start with a "." may be automatically hidden by your filesystem, you can see them by typing ls -a example: use the terminal and create a folder called .ssh in the home directory, then within the new .ssh directory create another directory called keys download the (academy and academy.pub) files and place them in the keys directory (you will have to either enable hidden folders, or do this all through the terminal)

mkdir ~/.ssh/keys

Open the directory where the key files where downloaded to and move them to .ssh/keys directory

mv academy ~/.ssh/keys
mv academy.pub ~/.ssh/keys

Step 3: Permissions for the private key

set permissions for your private key so that only the user has read/write access (i.e. sudo chmod go-rw ~/.ssh/keys/academy) your private key permissions could be rw-------, and your public key and config file permissions could be rw-r--r--

~/.ssh/keys$ chmod go-rw academy
~/.ssh/keys$ chmod go-rw-r--r-- academy.pub

Step 4: Setting the port

touch config

step 4: set the port that ssh uses to access fab.cba.mit.edu, by appending the following lines to ~/.ssh/keys/config (you might have to create ~/.ssh/keys/config, which is a text file with unix line endings and no .txt extension)

~/.ssh/keys$gedit config

Write this in the config file and save:

host fab.cba.mit.edu
port 846

Write

~/.ssh/keys$ chmod go-rw-r--r-- config

Step 5 Clone the archive

• go to where you want the archive to be in your filesystem, and clone the archive
• note that local_archive_name will be a directory with the archive inside it
• ssh_path is the ssh application, including the path, if necessary

Copy the text (after $ )to the terminal:

~/Documents/FabAcademy2014$ hg clone -e "ssh -p 846 -i ~/.ssh/keys/academy" ssh://hg@fabacademy.org/academy.2014 academy.2014

• Eddie (Manchester) - Need to include sudo before hg
• Bas (Reykajvik) - Don't include sudo before hg!

Step 6

• append the following your archive's personal configuration file, .hg/hgrc with any text editor
• (the .hg directory is in the fabClassArchive directory, and is a text file with unix line endings and no .txt extension)

~/Documents/FabAcademy2014$ sudo gedit .hg/hgrc

Put this text in the file

[paths]
default = ssh://hg@fabacademy.org/academy.content
[ui]
username = First Last <user@machine.domain>
ssh = ssh -p 846 -i ~/.ssh/keys/academy -C
[hooks]
changegroup = hg update >&2

Step 7

try updating your archive by typing:

~/Documents/FabAcademy2013/academy.2013$ hg pull

• Eddie (Manchester) - Need to include sudo before hg command (bas: no, don't use sudo)

you should see a response like this:

• pulling from ssh://hg@fab.cba.mit.edu/academy.2013
• searching for changes
• no changes found

if it asks for a password, then it can’t find the key or the key file permissions make it not look like a key (see step 3) if it says something about port 22, then it can't find the config file (see step 4)

To open Mercurial

• To get all changes from another repository into the current one

~/Documents/FabAcademy/academy.2013$ hg pull

• Update

~/Documents/FabAcademy/academy.2013$ hg update

• Add new files

 hg add

• Commit changes

 hg commit -m 'MESSAGE'

• merge

 hg merge

Push files to server

 hg push

Work in process.... to be editied

in addition there are a couple of lines of code to run in the terminal which makes life so much easier:

to setup the config file with host and port:

echo -en "host fab.cba.mit.edu\nport 846" > ~/.ssh/config

to edit the hgrc file (change paths):

echo -en "\n\n[ui]\nusername = First Last <email@mit.edu>\nssh = ssh -i ~/.ssh/academy -C\n\n[extensions]\nconvert =\nfetch =\n\n[hooks]\n\nchangegroup = hg update >&2"  >> ~/Desktop/Archive/.hg/hgrc

This tutorial is very well documented, both for Windows and Mac:

Mercurial Windows

• 1. Download TortoiseHg

• 2. Download the two key files academy (private key) and academy.pub

(the public key).

• 3. Next, we need to convert the OpenSSH version 2 keys to a

Putty-style key (.ppk format). Download puttygen.exe here: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html.

• 4. Run puttygen.exe and select File->Load Private Key to convert to a

.ppk format key. Save it as academy.ppk.

• 4. Find the directory where TortoiseHg was installed, probably in

c:\Program Files. Run the program Pageant, which will pop up in your task bar. Open Pageant, select "Add key" and give it the academy.ppk file.

• 5. In Windows Explorer, right click on the directory you want to

become the clone of the archive, and select TortoiseHg->Clone. In Source path type:

 ssh://hg@academy.cba.mit.edu:846/academy

If it complains about not having the public key, that's ok.

Links

• http://fabacademy.org/archives/2014/tutorials/mercurial_install_ubuntu.html
• http://www.as220.org/fabacademy/tutorials/mecurial_troubleshooting.html
• http://fab.cba.mit.edu/classes/MIT/863.10/people/natalie.freed/Mercurial_notes_notes.html