Re: [Gnu-arch-users] [BUG] feature plan -- version variables

[Bug Goo]

Created as bug 130

On Tue May 25 01:47:31 2004, Tom Lord wrote:
> 
> Version variables are persistent variables associated 
> with versions.  At each revision within a version, all
> of the variables have a definate value.  By default, 
> each revision inherits the values from its immediate ancestor
> but variable values can be changed by any revision.
> 
> 
> * Range
> 
>   The value of a version variable must be a Pika Scheme s-expression
>   satisfying certain constraints:
> 
>         1) Only cons pairs, booleans, small integers,
>            nil, and strings containing only iso-8859-1
>            characters may occur in the value.
> 
>       2) Cons pairs may occur in the value only
>            as part of a proper list.
> 
> 
> * Domain
> 
>   The name of a version variable must consist entirely of ascii
>   numbers and letters, dash ('-'), and dot ('.').  
> 
> 
> * Representation
> 
>   Within a project tree, variable values are usually found by
>   reading the patch-log.   The latest patch-log entry for the 
>   tree-version of the project tree may contain a header:
> 
>       set-in-version: (<name> <value>)*
> 
>   Variables without an explicitly set value have the value false
>   (`#f').
> 
>   If the file ./{arch}/++variables exists then it should contain
>   0 or more valid `set-in-version' log message headers -- these
>   override the settings in the latest patch log entry.
> 
> 
> * Commands
> 
>   % tla version-var [--local|default|inherited]
> 
>   [print a list of version variables and their values
> 
>    --local: show only variables set in ./{arch}/++variables
> 
>    --inherited: show only variables set _only_ in the latest patch log
>       entry
> 
>    --default: show all variables set in the latest patch log]
> 
> 
>   % tla version-var name
>   [print the value of name]
> 
>   % tla version-var name value
>   [locally set the value of name to value]
> 
>   % tla version-var --unset name
>   [remove any local setting for name]
> 
> 
> -t
> 
> ----
> 
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> 
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> 
> 
> 
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