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hg2git

Author: Kazimierz Gofron
Created: February 12, 2020
Last Updated: April 22, 2020
Copyright (c): 2020 Brookhaven National Laboratory

InPlace migration of mercurial EPICS ioc repository to git

Release version of this converter of EPICS iocs to git are available on github. Please report any problems of feature requests on the issues page of the https://github.com/kgofron/hg2git.

This mercurial to git converter was tested only for inPlace (within hg repo) conversion of EPICS iocs, and supports following options.

  • -r . {local inPlace hg repository to be migrated into git/gitlab}
  • -b Only push active $BRANCH branch
  • -D7 {Debian 7 repository; no option when using Debian 10}
  • -as pAS {turboPmac ioc autosave files from as/req and as/save}
  • -as cAS {areaDetector iocs autosave files}
  • -u owner {convert repo owned by another user: softioc}
  • -url url (https://github.com/kgofron/) {git destination repository}
  • --force {force option for pushing to the destination git repository}

Debian 7 turboPmac ioc conversion example with autosave files owned by softioc user

kgofron@xf10idd-ioc1:/epics/iocs/mc3$ hg2git.sh -r . -D7 -as pAS -u softioc -url https://github.com/kgofron/ --force`
  • Debian 10 turboPmac ioc conversion example without autosave files
kaz@debian10:~/ioc1/mc3$ hg2git.sh -r . -url https://github.com/kgofron/  --force
  • Debian 7 areaDetector migration of only one (active) branch
hg2git/hg2git.sh -r . -b -D7 -as cAS -u softioc -url https://gitlab.nsls2.bnl.gov/xf/10id/iocs/xf10idd-ioc1/  --force

Structure same as hg

  • gitlab.nsls2.bnl.gov/xf/10id/iocs/xf10idd-ioc1
    • mc1
    • mc2
    • cam-onAis

Installation

Note - The hg2git has only been tested on Debian 7 and Debian 10

Clone this repository to a convinient location, and add that location to PATH

cd ~/src
git clone https://github.com/kgofron/hg2git
export PATH=$PATH:~/src/hg2git

From within the hg repository issue the hg2git command followed by options The local name of the repository folder and github/gitlab must be same. The github/gitlab repository on the server must be created prior to conversion, or push will not work. The --force option overwrites the git repository on the gitlab/github server.

$ hg2git.sh -r . -D7 -as pAS -url https://github.com/kgofron/ --force`

This hg2git converter installs the fast-export converter in the /tmp/ directory on linux system.

Some Known Issues

  • The current version was tested for
    • pmac motor iocs autosave (-as pAS)
    • areaDetector iocs autosave (-as aAS)
  • Pushing of tags has been implemented but not tested
  • Other types of iocs autosave might be added in the future, per request.
  • Authors file is generated in /tmp/authors, but not tested
  • Author suggests merging and organizing repository should be performed in mercurial prior to conversion. The hgCloseBranch.sh is included for that purpose.

Hg repository updates prior to hg2git conversion

The hgCloseBranch.sh helps to organize the mercurial repository prior to conversion to git. The script merges active feature branch, and/or close another branch.

  • merges '-b' into default branch and closes
  • closes -cb <c_branch> without merging into default.
hgCloseBranch.sh -b srx -u softioc -cb chx    # merge srx, and close chx