It's impossible to build picodata with packpack - it removes the `.git`
directory from the build environment. The git is only necessary for
applying tarantool patches, but `patch -p1` can be used for that
instead.

Georgy Moshkin authored 2 years ago and Georgy Moshkin committed 2 years ago

since 1.61 rust has added a `whole-archive` modifier for link targets
which is unset by default.

Previously to this version this was probably undefined behavior, because
the linking would work fine when building an executable (like picodata)
but would fail with undefined symbols when building a static library.

But now with the advent of this option, we can probably refactor
picodata into a library which can be useful for testing, i.e. we can
exclude testing stuff from the binary but still have a test binary with
all the necessary runtime symbols.

Closes #81

- don't patch if tarantool-sys/patch-applied exists
- use a single build directory for `cargo build` & `cargo check`

+ tarantool-sys submodule
+ tarantool-patches directory
+ build.rs build script to patch and build tarantool
+ static linking with tarantool
+ refactoring for cli arguments