This is a fork of https://github.com/mavam/trac-hub.git whre I collect the changes I have made in order to migrate my projects from trac via github to gitlab.

Major changes are

use docker to run the dependencies (in particular ruby, mysql)
tweak the layout of the ticets according to our taste
transfer some informations to labels and some to the ticket body (called badges in the script)
maintain the ticket id even of they are not consequtive in trac. For this we create dummy tickets
handle milestones
handle attachments
drive it all by config file. Rename configfile to trac-hub.config.yaml; search the config file in the parent folder and in the current folder.

Getting started

Prerequisites

docker
access to the trac-envionment. Tthis script needs direct access to the svn repository as well as the trac-env. It does not use trac api.
git
a github account

how to use it

install docker

create a working folder structure like this

trac-to-github
  +- trac-env           # this is the trac-environment from the source
  +- trac-hub           # created by git clone of this projct
  +- foobar-git         # the corresponding git repository
                        # created by `git-svn clone <svn-url>/trunk foobar-git`

clone this project
cd to this project
start mysql by

'docker-compose up mysql'

you can then access the database server under localhosot:3306
import the trac to a new database on this server, e.g. foobar

ensure the dataase collation

ALTER DATABASEfoobarCHARACTER SET utf8 COLLATE utf8_bin;
copy the trac environment to a sibling of this project. This will be needed to extract the attachments.
create parts for the config file

docker-compose run --rm trac-hub -i > x.txt
create trac-hub.config.yamlbased ontrac-hub.confg.yaml.example`
adjust settings in trac-hub.config.yaml. Therby use parts of x.txt
convert the svn to git

git-svn clone <svn-url>/trunk foobar-git
create the project on github and push foobar-git by following the instructions from github
```
git remote add origin https://github.com/bwl21/foobar.git
git push -u origin master
```
create an app key in https://github.com/settings/apps/new enter the key to trac-hub.config.yaml
create the revmap by

git svn log --show-commit --oneline foobar-git > revmap.txt
create the attachment exporter

docker-compose run --rm trac-hub -A
you will see a message about the crated file
now run the converter

docker-compose run --rm trac-hub --M -s 0
If something goes wrong, restart the the converter

docker-compose run --rm trac-hub --M -s <next free id>

Bonus :-)

You can run a trac-instance - without svn - but to inspect details by

`deocker-compose up tracd`

you can run a gitlab-instance

'docker-compose up gitlab`

I managed to import the converted github project in to this local instance for testing purpoes

future

May be we can add direct gitlab support to trac-hub

trac-hub

trac-hub converts trac tickets into github issues. To this end, it accesses trac's underlying database to create tickets and post the change history of each ticket as comments.

Synopsis

Copy the example YAML configuration and adapt it as needed:

cp config.yaml.example config.yaml
vim config.yaml

Thereafter just invoke trac-hub:

./trac-hub

If this fails with an error, make sure to have a look at the Dependencies section.

By default, trac-hub assumes the file config.yaml in the same directory as the script. You can also specify the configuration file on the command line:

./trac-hub -c foo.yaml

Add the -v flag for more verbose output:

./trac-hub -v

Add the -o flag to only import the tickets that are not in a closed status:

./trac-hub -o

To resume the migration at a given trac ticket ID, use -s:

./trac-hub -s 42

If you want all trac comments/changes to be compiled into a single post on the github issue:

./trac-hub -S

If you migrate to a bare github, you might want want to ensure that the ticket ids do not change. In this case you can create dummy tikcets forids missing in trac (because they were deleted). The process might interrupt, so you can still specify the first number to transfer.

/trac-hub -M -s 601

Note: when converting your trac setup to github, it is prudent to first try the migration into a test repository which you can delete afterwards. If this worked out fine and delivered the expected results, one can still aim the script at the real repository.

Issue numbers

By default, trac-hub will verify that the created issue numbers match the ticket IDs of the corresponding trac ticket and error-exit if the number is off.

If you need this behaviour, you should also disable user interactions by setting Limit to repository collaborators under your repository settings. Alternatively, when migrating issues to a new repository, import the issues on a test-repository and rename the repository to the final name when the import went satisfactory.

You can disable this check by using the fast option:

./trac-hub -F

This will also make your import much faster (but after the script has finished, it can still take some time until the issues are created on github).

Using this option is obligatory, if you know that the ticket IDs will not match, e.g. because non-trac tickets already exist. In this case, you must also specify the ID of the first ticket to be migrated (even if it is 1):

./trac-hub -F -s 1

If you start to import in a fresh github project, trac-hub can create dummy tickets issue numbers not available in trac. This even works if you want to run it multiple times. In this case you need to provide -s for the first id not available in Github.

./trac-hub -M

Technology

It uses uses github's new issue import API to create issues

without hitting abuse detection warnings and getting blocked
without sending email notifications
without increasing your contribution count to ridiculous heights
much faster than with the normal issues API
with correct creation/closed date set
atomically without users being able to interfere in the creation of a single issue

Configuration

The YAML configuration file contains four sections. The section trac includes all trac-related configuration options. The database URL follows the scheme described here. In order to use databases other than sqlite, you may have to add them to the Gemfile. For mysql databases, you should use the mysql2 adapter.

The section github includes the repository to migrate as well an API token which can be generated under Settings -> Personal Access Tokens.

The section labels allows for custom label mappings. Since github's issue tracker does not have a first-class notion of ticket priority, type, and version information, trac-hub supports expressing these in the form of labels.

The section users contains a one-to-one mapping between trac usernames or email addresses and github usernames for users for which no github credentials are known or can't be used and are thus not stored in the github section. As soon as you have the login credentials for a user please use the github logins section in the config instead.

The section milestones containes a mapping of milestones as it is generated by trac-hub -i

The secion attachments specifies how you want to grab attachments. In particular the attachment_uri supports the case that the imagename is embedded in the uri:

The imagename is built of ticket_id and image filename. exportfolder ist the folder where the images will be downloaded to on the trac system.


attachments:
  attachment_uri: https://gitlab.com/mynamespace/myrepo/raw/master/from_trac/#imagename#?inline=false
  export_folder: ./attachments
  export_script: attachments.sh

https://gitlab.com/pjtadmin/pjtadmin_attach/raw/develop/from_trac/233/screenshot_183.jpg https://gitlab.com/pjtadmin/pjtadmin_attach/raw/develop/from_trac/233/screenshot_183.jpg You can use

trac-hub -i

to produce a yaml file with labels, users, milestones etc. You can copy this into the config file and adapt it as required.

it also produces a shell script which in invokes trac-admin to download the attachments from trac.

Dependencies

Make sure you have the bundler gem installed (gem install bundler). Thereafter, you can install missing dependencies via bundle install.

The easiest way to install the dependencies locally is as follows:

bundle install --path vendor/bundle

In this case, you can execute the program by replacing ./trac-hub above with bundle exec trac-hub, e.g.:

bundle exec trac-hub -s 42

License

trac-hub comes with a BSD-style licence.

bwl21/trac-hub