This is Pamela Stotter’s translation of a Joseph Gelineau SJ song. The text is credited to AELF, which I gather is the Association Épiscopale Liturgique pour les pays Francophones.
It is in CWB and Alleluia! Amen! but I can’t find other sources. I can’t even find it on One Licence but I figure it’s got to be there, after all, it is on the recommended list from the Australian Bishops. Maybe my correspondents know more.
I made up some chords and made a backing:
I’m not sure I want agents of the AELF after me, so I’ll let you find the text in CWB I.