Re: [Gnu-arch-users] What's the difference bitween 'junk' and 'backup' ?

[Aaron Bentley]

Tez Kamihira wrote:
> Hi,
>
> I'm writing a Japanese document of GNU arch by my own words.
>
> I have a question.
>
> I understood the difference between 'precious' and other
> non-source groups. There are 4 commands that call
> arch_copy_project_tree() in ./src/tla/libarch/copy-project-tree.c.
> those are 'apply-delta', 'join-branch', 'sync-tree', and 'update'
> with --dist option. They preserve precious files in the distination
> trees as well as source group.
>
> But I didn't understand the difference between 'junk' and 'backup'
> groups even if I analizied tla's source code.
>
> What is it ?

The docs in the default =tagging-method are pretty good:

# category:      copy locally?       safe to clobber?      archive?
#
# junk           no                  yes                   no
# backup         no                  no                    no
# precious       yes                 no                    no
# source         yes                 no                    yes

So the difference between backup and junk is that junk files are 
considered "safe to clobber", and may be overwritten or deleted at any time.

Aaron