This is in the same style as GLib's GLIB_CHECK_VERSION [1].
Note that the github.com/HarryMichal/go-version package is a fork of
github.com/mcuadros/go-version. The latter is now marked as read-only
and archived by its owner.
The fork was necessary to fix the documentation of the CompareSimple
function. The function is supposed to conform to the strcmp
convention. ie., return 0 if both versions are equal, 1 if the left
side is bigger, and -1 if the right side is bigger. However, the
documentation had it the other way round.
[1] https://developer.gnome.org/glib/stable/glib-Version-Information.html#GLIB-CHECK-VERSION:CAPShttps://github.com/containers/toolbox/pull/318
These values are generally useful, and reading any of them is a
potentially fallible operation. Since the absence of any of these
values is indicative of a broken environment, it's more convenient to
read them early on during start-up and abort, instead of trying to
handle the error later on.
https://github.com/containers/toolbox/pull/318
All the existing commands and their flags are present; but barring
'help', '--help' and logging, they don't do anything.
The skeleton was bootstrapped with Cobra Generator.
https://github.com/containers/toolbox/pull/318
A subsequent commit will use this to implement the help command.
Just like the existing POSIX shell implementation, the standard error
needs to be redirected to standard output. For details see commit
5e63e9ec9b.
https://github.com/containers/toolbox/pull/318
Meson doesn't support Go [1], so this is implemented by a custom target
that invokes 'go build' to generate the binary.
Unfortunately, when using Go modules, 'go build' insists on being
invoked in the same source directory where the go.mod file lives,
while Meson insists on using a build directory separate from the
corresponding source directory. This is addressed by using a build
script that goes into the source directory and then invokes 'go build'.
Currently, the Go code is only built when a Go implementation is found,
and even then, it's not installed. Non-technical end-users are supposed
to continue using the POSIX shell implementation until the Go version
is blessed as stable.
[1] https://github.com/mesonbuild/meson/issues/123https://github.com/containers/toolbox/pull/318
