Whole code-base reformatting

[rouault]

• Add a .pre-commit-config.yaml pre-commit configuration file
• Doc: add a dev_practices.rst page
• Whole code base reformatting
• Add .git-blame-ignore-revs

[rouault]

Doc how to setup pre-commit hook at https://github.com/rouault/PROJ/blob/reformat_whole/docs/source/development/dev_practices.rst
This mimmicks recent similar move in GDAL and libtiff

[busstoptaktik]

If I understand the meaning of this item correctly, I think the commit some years back, where you renamed all .c files to .cpp should probably also be ignored? (there may be others as well, which I have lost track of?)

[rouault]

I think the commit some years back, where you renamed all .c files to .cpp should probably also be ignored? (there may be others as well, which I have lost track of?)

I don't believe this is necessary as git is already smart enough to figure out file renames.

[busstoptaktik]

I don't believe this is necessary as git is already smart enough to figure out file renames.

I think you're right: "git blame" appears to work fine - it's just the "contributors"-banner dispayed by Github over each file that only includes people contributing after the renaming. Perhaps more of a Github UI/UX bug-let...

[jjimenezshaw]

I had some difficulties installing clang-format-15 in my Ubuntu 22.04 (things are too old or too new)
So this is a tip if anybody has the same problem. I installed manually the deb files

• libllvm15_15.0.6-3_ubuntu0.22.04.2_amd64.deb
• libclang-cpp15_15.0.6-3_ubuntu0.22.04.2_amd64.deb
• clang-format-15_15.0.6-3_ubuntu0.22.04.2_amd64.deb

from http://security.ubuntu.com/ubuntu/pool/universe/l/llvm-toolchain-15/

[rouault]

I had some difficulties installing clang-format-15 in my Ubuntu 22.04 (things are too old or too new)

unless you want to manually run reformat_cpp.sh, you don't need to do that. Just follow instructions at https://github.com/rouault/PROJ/blob/reformat_whole/docs/source/development/dev_practices.rst#commit-hooks