Ping: [XEN PATCH v2] build: add --full to version.sh to guess $(XEN_FULLVERSION)

[Anthony PERARD <anthony.perard@citrix.com>]

Anyone to review this?

Thanks.

On Thu, Sep 09, 2021 at 03:33:06PM +0100, Anthony PERARD wrote:
> Running $(MAKE) like that in a $(shell ) while parsing the Makefile
> doesn't work reliably. In some case, make will complain with
> "jobserver unavailable: using -j1.  Add '+' to parent make rule.".
> Also, it isn't possible to distinguish between the output produced by
> the target "xenversion" and `make`'s own output.
> 
> Instead of running make, this patch "improve" `version.sh` to try to
> guess the output of `make xenversion`.
> 
> In order to have version.sh works in more scenario, it will use
> XEN_EXTRAVERSION and XEN_VENDORVERSION from the environment when
> present. As for the cases were those two variables are overridden by a
> make command line arguments, we export them when invoking version.sh
> via a new $(XEN_FULLVERSION) macro.
> 
> That should hopefully get us to having ./version.sh returning the same
> value that `make xenversion` would.
> 
> This fix GitLab CI's build job "debian-unstable-gcc-arm64".
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
> ---
> v2:
> - use $(SHELL) to execute ./version.sh
> - get XEN_EXTRAVERSION from the environment if exist
> - use XEN_VENDORVERSION when exist in the environment
> - introduce a new macro $(XEN_FULLVERSION) whose jobs is to export
>   $(XEN_EXTRAVERSION) and $(XEN_VENDORVERSION) in cases where those
>   are overridden by command line argument of make.
>   (we can't just use make's "export" because it doesn't work when
>   parsing the makefile which is when $(shell ) get's executed for
>   POLICY_FILENAME, so it wouldn't work when running `make -C
>   tools/flask/policy XEN_VENDORVERSION=-os`.)
> ---
>  tools/Rules.mk                     |  5 +++++
>  tools/flask/policy/Makefile.common |  2 +-
>  version.sh                         | 18 +++++++++++++++++-
>  3 files changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/Rules.mk b/tools/Rules.mk
> index 2907ed2d3972..b022da3336c4 100644
> --- a/tools/Rules.mk
> +++ b/tools/Rules.mk
> @@ -6,6 +6,11 @@ all:
>  -include $(XEN_ROOT)/config/Tools.mk
>  include $(XEN_ROOT)/Config.mk
>  
> +XEN_FULLVERSION=$(shell env \
> +    XEN_EXTRAVERSION=$(XEN_EXTRAVERSION) \
> +    XEN_VENDORVERSION=$(XEN_VENDORVERSION) \
> +    $(SHELL) $(XEN_ROOT)/version.sh --full $(XEN_ROOT)/xen/Makefile)
> +
>  export _INSTALL := $(INSTALL)
>  INSTALL = $(XEN_ROOT)/tools/cross-install
>  
> diff --git a/tools/flask/policy/Makefile.common b/tools/flask/policy/Makefile.common
> index bea5ba4b6a40..e5ed58200e75 100644
> --- a/tools/flask/policy/Makefile.common
> +++ b/tools/flask/policy/Makefile.common
> @@ -35,7 +35,7 @@ OUTPUT_POLICY ?= $(BEST_POLICY_VER)
>  #
>  ########################################
>  
> -POLICY_FILENAME = $(FLASK_BUILD_DIR)/xenpolicy-$(shell $(MAKE) -C $(XEN_ROOT)/xen xenversion --no-print-directory)
> +POLICY_FILENAME = $(FLASK_BUILD_DIR)/xenpolicy-$(XEN_FULLVERSION)
>  POLICY_LOADPATH = /boot
>  
>  # List of policy versions supported by the hypervisor
> diff --git a/version.sh b/version.sh
> index e894ee7e0469..c6a5692c1982 100755
> --- a/version.sh
> +++ b/version.sh
> @@ -1,5 +1,21 @@
>  #!/bin/sh
>  
> +opt_full=false
> +while [ $# -gt 1 ]; do
> +    case "$1" in
> +        --full) opt_full=true ;;
> +        *) break ;;
> +    esac
> +    shift
> +done
> +
>  MAJOR=`grep "export XEN_VERSION" $1 | sed 's/.*=//g' | tr -s " "`
>  MINOR=`grep "export XEN_SUBVERSION" $1 | sed 's/.*=//g' | tr -s " "`
> -printf "%d.%d" $MAJOR $MINOR
> +
> +if $opt_full; then
> +    extraversion=$(grep "export XEN_EXTRAVERSION" $1 | sed 's/^.* ?=\s\+//; s/\$([^)]*)//g; s/ //g')
> +    : ${XEN_EXTRAVERSION:=${extraversion}${XEN_VENDORVERSION}}
> +else
> +    unset XEN_EXTRAVERSION
> +fi
> +printf "%d.%d%s" $MAJOR $MINOR $XEN_EXTRAVERSION
> -- 
> Anthony PERARD
> 

-- 
Anthony PERARD