[PATCH] A few build.sh features

[Ian Romanick]

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Brian Rogers wrote:
> Here are a few patches that do things I found useful.
> 
> 
> 1. Specify -p to run 'git pull' on each component before building it.

NAK.  You really want 'git fetch ; git rebase origin/<current branch>'.
 git-pull really is the wrong thing to do here!  I have a separate
script that does this for everything in the tree.  The function that
does the fetch / rebase is:

function do_fetch_rebase
{
    if [ -d $1 ]; then
        pushd $1 > /dev/null

        git-fetch

        echo Updating component ${1}...
        branch=$(git-branch | grep '^\* ' | sed 's/. //')
        if [ $branch = master ]; then
           git-rebase origin
        else
           git-rebase origin/$branch
        fi

        popd > /dev/null
    fi
}

I patch that does something similar along with a check to make sure the
directory is a git tree (testing for .git should be sufficient) would be
more acceptable.

> 2. Specify -j <number> to pass the same parameter to make for parallel
> building.

NAK.  Just set the MAKEFLAGS environment variable.  I used to have a
similar patch until I discovered MAKEFLAGS.

> 3. Specify -o <module/component> to build just that component.
> 
> 
> 1 and 3 are useful in combination to issue a single command to update,
> build, and install a particular component.

Ironically, I was just thinking about adding a flag like that the other
day.  Thanks for being less lazy than I. :)

Acked-by: Ian Romanick <ian.d.romanick at intel.com>


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