Resolve "Enforce code format"

In discussion with all developers, we decided on a code style, reflected by `clang-format`. The push includes the following changes:

- `clang-format` is now mandatory for development and code must be properly formatted to be able to push to master
- A check if the code is properly formatted by the given `.clang-format` style file, is now part of the CI pipeline test
- The style file was tested on version 10 and 12 with the style file adhering to version 10.
- A new script `scripts/check_format.sh` has been added which is used by CI but can also be used by the user for two tasks:
    - Check if any files need to be formatted
    - Pass `-r` to reformat all files in place with `clang-format`
- All code has been reformatted to the decided style 


Closes #121

See merge request !66

Resolve "Upgrade syscall_intercept dependency for >glibc-2.3"

Closes #132

See merge request hpc/gekkofs!72

Marc Vef authored Oct 19, 2020 and Ramon Nou committed Oct 20, 2020

+ reformatting

Resolve "runtime_error needs stdexcept include"

Closes #109

See merge request hpc/gekkofs!51

Resolve "[master] AGIOS not found in the CI pipeline"

Closes #131

See merge request hpc/gekkofs!70

Release 0.8.0

See merge request hpc/gekkofs!67

Merge branch '78-errno-115-returned-on-successful-completion-for-several-system-calls' into 'master'

This fix contains three parts:

1. errno 115 was leaked during initialization of the client in
   init_ld_environment_(). However, the value on its own is irrelevant to
   this issue as all internal errno variable changes should be kept
   internal as it is the case during each syscall intercept hook.
   Therefore, the original errno variable is restored after the
   initialization finishes.
2. lseek() tests revealed that whence SEEK_SET was not handled
   correctly. It should not allow negative offsets.

3. All FIXME TODOs in the testing code have been removed including
   testing on the errno in a successful case because it is undefined.

Resolve "Errno 115 returned on successful completion for several system calls"

Closes #78

See merge request hpc/gekkofs!65

Testing on an error code in the successful case has an undefined value
and was therefore removed.

This was previously causing an errno of 115 during tests. While an errno of 0 is not guaranteed on success, all errno's within GKFS should be kept internal.

This reverts merge request !64

Merge branch '119-new-options-auto_sm-and-rpc_protocol-should-use-dashes-as-separators' into 'master'

Resolve "New options `--auto_sm` and `--rpc_protocol` should use dashes as separators"

Closes #119

See merge request !63

Resolve "AGIOS should not be required in CMake"

Closes #118

See merge request !62

Resolve "Set RPC protocol and auto_sm at runtime and not compile time"

Closes #101 and #118

See merge request hpc/gekkofs!40

Client now reads host file to determine auto_sm and RPC protocol

Resolve "Refactor readdir()"

Closes #117

See merge request hpc/gekkofs!55

- more error handling
- removed runtime exception from client
- Streamlining error handling in client and making it consistent. Adding comments
- Improved readdir logging