I regularly use Sage on a machine which either does not have its own
hg, or has too old a version, and then I just use "sage -hg" to run
Sage's own hg.  That's after building Sage, of course.

John

2009/12/30 Minh Nguyen <nguyenmi...@gmail.com>:
> Hi David,
>
> On Thu, Dec 31, 2009 at 3:42 AM, Dr. David Kirkby
> <david.kir...@onetel.net> wrote:
>> How can I produce a patch for Sage, if my Sage will not run on my machine?
>
> If you don't have hg installed on your system, you can use the command
> diff instead. For example, say the following content is saved to a
> file called "myfile.txt":
>
> <myfile-content>
> This sentense has a some typ0s.
> </myfile-content>
>
> Next, you fix typos in the file to get the new file "mynewfile.txt":
>
> <mynewfile-content>
> This sentence has a some typos.
> </mynewfile-content>
>
> You have to make sure that you first create a copy of "myfile.txt" and
> rename it as "mynewfile.txt" before doing any editing. You can now
> produce a diff file between myfile.txt and mynewfile.txt:
>
> diff -Naur myfile.txt mynewfile.txt > mydiff.patch
>
> which produces the following diff content:
>
> $ cat mydiff.patch
> --- myfile.txt  2009-12-30 08:50:54.462302935 -0800
> +++ mynewfile.txt       2009-12-30 08:51:15.389961721 -0800
> @@ -1 +1 @@
> -This sentense has a some typ0s.
> +This sentence has a some typos.
>
> When you compile Sage from source, Mercurial should also be built and
> installed during the build process. If the mercurial spkg is
> successfully installed, it should be in
>
> SAGE_ROOT/local/bin/hg
>
> In that case, make an alias to hg such as the following:
>
> alias 'hg'='/path/to/SAGE_ROOT/local/bin/hg'
>
> If you're trying to edit the Sage library, i.e. SAGE_ROOT/dev/sage/,
> then cd to SAGE_ROOT/dev/sage, edit the necessary file(s). Afterwards,
> do "hg status" to see which files have changed. To see the actual new
> content, do "hg diff"; be careful here because the output of "hg diff"
> is sent to standard output by default so you might see a bunch of
> stuff flash through your terminal screen. However, you should be able
> to redirect the output of "hg diff" to a file and review your changes.
> You can review your changes by looking at the diff output. When you're
> certain that you've made all necessary changes, do "hg commit" to
> commit your changes. To produce a patch, do
>
> $ hg export tip > mychanges.patch
>
> The basic steps are more or less similar if you're trying to edit a
> file in an spkg. In any case, you need to make sure that the directory
> you're editing from has a Mercurial repository. The command "hg
> status" should not report any errors if your current directory is
> under revision control.
>
> --
> Regards
> Minh Van Nguyen
>
> --
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