On 11-01-2010 08:29:32 +0000, Duncan wrote: > Fabian Groffen posted on Mon, 11 Jan 2010 08:50:30 +0100 as excerpted: > > > On 11-01-2010 01:25:45 +0100, Arfrever Frehtes Taifersar Arahesis wrote: > >> > Can you explain the intended use of this variable, and why normal > >> > DEPEND is not sufficient? > >> > >> PYTHON_DEPEND is intented to simplify specification of dependency on > >> Python. > >> > >> PYTHON_DEPEND="2:2.5" is shorter than: DEPEND="|| ( > >> =dev-lang/python-2.7* =dev-lang/python-2.6* =dev-lang/python-2.5* )" > > > > So if there is enough space to express the dependency with the current > > syntax, is it worth introducing a new shorthand for it then? > > > > Also for this example, why does 2:2.5 expand to 2.7, 2.6 and 2.5? I > > would have expected 2.0 ... 2.5. Maybe the language isn't as intuitive > > then as Sebastian pointed out. > > Initially intuitive, perhaps not, but reasonably easy after reading the > explanation: > > The first position is major python version, the second if present, > minimal version (within that major), so it can be read as =>version, the > third if present, maximum version (within that major), so it can be read > as <=. > > Thus, the above "2:2.5" means major version 2, minimal version 2.5 (no > maximum version within that major), so 2.5+.
what's wrong with ">=2.5 && <3.0" then? -- Fabian Groffen Gentoo on a different level
