New installation instructions

The following discussion from !28 (merged) should be addressed:

• @paconnor started a discussion:

  Need to update installation instructions (including installation with micromamba) in README.md

changed milestone to %Alma9 migration

assigned to @lmoureau

added Ongoing label

Prerequisites in micromamba 2.0.0:

• CMake (upgrade with pip)
• G++
• libgit2
• eigen
• ROOT
• RooUnfold (install with pip)
• correctionlib

git-lfs missing on NAF EL9

mentioned in commit 6a4da714

mentioned in merge request !29 (merged)

mentioned in commit 091e272b

mentioned in commit b0229510

mentioned in commit f33e7304

mentioned in commit 42171e7b

When installing correctionlib in Micromamba, use pip install --no-binary=correctionlib correctionlib otherwise the C++ ABI will not be compatible. It also needs to be added to $LD_LIBRARY_PATH by hand.

Looks like we also need to add RooUnfold to LD_LIBRARY_PATH by hand:

% unfold 
unfold: error while loading shared libraries: libRooUnfold.so: cannot open shared object file: No such file or directory

added to epic &3

assigned to @paconnor

mentioned in merge request !30 (merged)

closed