Re: [Xen-devel] [PATCH 7/8] raisin: Rework component specification

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 04/17/2015 11:40 AM, Stefano Stabellini wrote:
> On Thu, 16 Apr 2015, George Dunlap wrote:
>> Allow COMPONENTS to be specified in the config (or on the command-line)
>>
>> Now you can keep all components enabled in your config but build only
>> one like so:
>>
>> COMPONENTS="xen" ./raise build
>>
>> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
>> ---
>> CC: Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>
>> ---
>>  defconfig               |  5 +++++
>>  lib/common-functions.sh | 49 
>> +++++++++++++++++++++++++++++++++++--------------
>>  2 files changed, 40 insertions(+), 14 deletions(-)
>>
>> diff --git a/defconfig b/defconfig
>> index 23c76eb..4ec8a0b 100644
>> --- a/defconfig
>> +++ b/defconfig
>> @@ -1,5 +1,10 @@
>>  # Config variables for raisin
>>  
>> +# Components
>> +# All components: xen grub libvirt
>> +# Core xen functionality: xen
>> +DEFAULT_COMPONENTS="xen grub libvirt"
>> +
>>  # Build config
>>  ## Make command to run
>>  MAKE="make -j2"
>> diff --git a/lib/common-functions.sh b/lib/common-functions.sh
>> index e66c6f4..42406e9 100644
>> --- a/lib/common-functions.sh
>> +++ b/lib/common-functions.sh
>> @@ -31,13 +31,41 @@ function common_init() {
>>  
>>      get_distro
>>      get_arch
>> +    get_components
>>  
>> -    for f in `cat "$BASEDIR"/components/series`
>> +    echo "Distro: $DISTRO"
>> +    echo "Arch: $ARCH"
>> +    echo "Components: $COMPONENTS"
>> +
>> +    for f in $COMPONENTS
>>      do
>>          source "$BASEDIR"/components/"$f"
>>      done
>>  }
>>  
>> +function get_components() {
>> +    if [[ -z "$COMPONENTS" ]]
>> +    then
>> +    COMPONENTS="$DEFAULT_COMPONENTS"
>> +    fi
>> +
>> +    if [[ -z "$COMPONENTS" ]] 
>> +    then 
>> +    local component
>> +    for component in `cat "$BASEDIR"/components/series`
>> +    do
>> +        local capital
>> +            capital=`echo $component | tr '[:lower:]' '[:upper:]'`
>> +            if eval [[ ! -z \$"$capital"_UPSTREAM_REVISION ]]
>> +            then
>> +            COMPONENTS="$COMPONENTS $component"
>> +            echo "Found component $component"
>> +            fi
>> +    done
>> +    export COMPONENTS
>> +    fi
>> +}
>> +
>>  function get_distro() {
>>      if [[ -x "`which lsb_release 2>/dev/null`" ]]
>>      then
>> @@ -222,20 +250,13 @@ function stop_initscripts() {
>>  }
>>  
>>  function for_each_component () {
>> -    for component in `cat "$BASEDIR"/components/series`
>> +    local component
> 
> One important thing here is that the order is important: xen is the
> first item in the series file for a reason. I think we should use the
> COMPONENTS variable to check for what components are enabled, but then
> still use the series file for the ordering.

Yes, I thought about that.  I had the idea it wouldn't be the easiest
thing to do in bash, but I'll take a look.

FYI I basically spent the "development day" for 4 weeks on those two
series, so it may be a while before I get back to it. :-)  (Depends on
how much review there is to do.)

 -George



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