Instructions for creating a new CMT package

These instructions are for creating a new package in CVS. Since all CVS packages will soon be migrated to SVN, it is recommended to create new packages directly in SVN.

Choose a name and location for your package

Your package should have a unique name (unique to the LHCb software), so choose a name that is both descriptive and specialised: Components is a bad name, FredComponents is good. You should also choose an LHCb subsystem ("Hat") among existing ones, e.g. Phys if your components are for doing a physics analysis. Finally, you must choose a "Project" among existing ones within which your package should be released, e.g. Analysis

In what follows, let us assume you want to write a components package called FredComponents for subsystem Phys, in Analysis project

Work in the appropriate project directory

SetupProject --build-env Analysis
You will be prompted for a version number, choose the most recent one. This puts you in the directory $User_release_area/Analysis_<version>

Create the package root directory

mkdir -p Phys/FredComponents
cd  Phys/FredComponents

Create the package directory structure

For a components package, just cmt, doc, src are needed (no public includes)
mkdir cmt doc src

Edit requirements (or copy them from a similar package...) and configure the package

cd doc
emacs release.notes
Add some meaningful release notes to explain the purpose of the package, the author etc...
cd ../cmt
emacs requirements
Edit the requirements file.
cmt config
Configure the package

Write some code and build a library

cd ../src
Add ∗.cpp files
cd ../cmt
cmt make
component library is built

Import the new package to CVS

Note: the CVSROOT variable is not defined in the default LHCb environment. It has therefore to be added explicitly to commands which are not using the local CVS/Root file, using the -d CVS option. This is the case for example for cvs import or plain cvs checkout

Important: Please make sure that the import command is run from inside the directory you want to import:

cd $User_release_area/Analysis_<version>/Phys/FredComponents
Remove first all files you do not wish to import: binary directories, backup copies (∗~), generated files in cmt directory (only requirements is needed)
rm -r x86∗
rm ∗/∗~
rm cmt/∗.∗
rm cmt/∗Make∗
And now import to CVS
cvs -d import -m " first import of FredComponents under Phys" Phys/FredComponents myid v0r0
myid is a "vendor-tag" in the CVS terminology. It is recommended to use your AFS user name.

Add your new package in the list of CVS modules

cd $User_release_area
cvs -d co CVSROOT/modules
emacs modules
Add your package in the list:
Phys/FredComponents         Phys/FredComponents
And put the changes into CVS
cvs -d commit -m "add Phys/FredComponents in the list of CVS modules"
cd ..

Check that everything is OK

First rename the original package
cd $User_release_area/Analysis_<version>/Phys
mv FredComponents _FredComponents
Then check out your package from CVS
cd $User_release_area/Analysis_<version>
getpack Phys/FredComponents head
cd Phys/FredComponents/cmt
cmt show uses
cmt make
If everything looks fine you can remove the original version
cd ../..
rm -r _FredComponents

Finally, add the new package to the project

cd $User_release_area/Analysis_<version>
getpack AnalysisSys head
cd AnalysisSys
emacs cmt/requirements
Add the new package:
use FredComponents v∗ Phys
Update the release notes
emacs doc/release.notes
Commit and tag the changes
cvs -d commit -m "added package Phys/FredComponents"
Then tag and add to the tag collector

-- MarcoCattaneo - 2009-09-14

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Topic revision: r7 - 2011-06-22 - PatrickSKoppenburg
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