This allows Qmake to use the version number as well as not requiring all
other uses of the version string to strip double quotes from it. This
also reduces the fragility of the version string as it was required to
be a valid C++ char*, even in contexts where that wouldn't matter.
Users do not care about commit numbers and it only serves to confuse
them. Release builds should not contain build metadata since there
should only be one definitive version.
SemVer 2.0.0 requires a plus for build metadata.
https://semver.org/
`Build metadata MAY be denoted by appending a plus sign and a series of
dot separated identifiers immediately following the patch or pre-release
version. Identifiers MUST comprise only ASCII alphanumerics and hyphen
[0-9A-Za-z-]. Identifiers MUST NOT be empty. Build metadata SHOULD be
ignored when determining version precedence. Thus two versions that
differ only in the build metadata, have the same precedence. Examples:
1.0.0-alpha+001, 1.0.0+20130313144700, 1.0.0-beta+exp.sha.5114f85.`
While the initial idea of having cmd/PS/bash actually write the changes
to file, the integration with the AppVeyor YAML just made it really
frustrating.
Vasily