Ray,

Your suggestion is good for open source, but unfriendly to the close source 
platforms which consume this lib.

Hi Mike/Liming/Ray/Others,

Do we have a progress to retire lib/API/others in the open source, like below?
1. Announce that there is something going to retire.
2. Suggestion to replace the retired function in open source. Or the 
justification of the retirement.
3. Collect the feedback especially the disagreement.
4. Discuss and make the decision.
5. Reject the retirement. Or announce the retire date to let consumers to 
change their platform codes.
6. Retire the function.

Thanks,
Zhichao

> -----Original Message-----
> From: Ni, Ray
> Sent: Friday, December 20, 2019 3:16 PM
> To: Gao, Zhichao <zhichao....@intel.com>; devel@edk2.groups.io
> Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming
> <liming....@intel.com>; Vitaly Cheptsov <vit9...@protonmail.com>
> Subject: RE: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib: Separate
> the lib instances
> 
> Zhichao,
> I prefer to have one patch serial which include:
> 1. Adds new mandatory instance
> 2. Update consumers to use the new instance 2. Removes the old mandatory
> instance
> 
> Otherwise, adding a new mandatory instance introduces more code duplication
> IMO.
> 
> Thanks,
> Ray
> 
> > -----Original Message-----
> > From: Gao, Zhichao <zhichao....@intel.com>
> > Sent: Friday, December 20, 2019 2:41 PM
> > To: Ni, Ray <ray...@intel.com>; devel@edk2.groups.io
> > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming
> > <liming....@intel.com>; Vitaly Cheptsov <vit9...@protonmail.com>
> > Subject: RE: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib:
> > Separate the lib instances
> >
> > For open source, it would impact fsp2 package, ovmf package and some
> > open platform packages. Not sure for others.
> > I didn't plan the removal of UefiDevicePathLibDevicePathProtocol yet.
> >
> > Thanks,
> > Zhichao
> > > -----Original Message-----
> > > From: Ni, Ray
> > > Sent: Friday, December 20, 2019 2:20 PM
> > > To: Gao, Zhichao <zhichao....@intel.com>; devel@edk2.groups.io
> > > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming
> > > <liming....@intel.com>; Vitaly Cheptsov <vit9...@protonmail.com>
> > > Subject: RE: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib:
> > Separate
> > > the lib instances
> > >
> > > Removing code duplication is great.
> > >
> > > But your patch introduces more code duplication: the mandatory one
> > > in UefiDevicePathLib directory and the other one in
> > > UefiDevicePathLibDevicePathProtocol directory.
> > >
> > > Do you have a plan to remove the one in
> > UefiDevicePathLibDevicePathProtocol
> > > directory?
> > > Have you evaluated the impact to consumers of removing that one?
> > >
> > > Thanks,
> > > Ray
> > >
> > > > -----Original Message-----
> > > > From: Gao, Zhichao <zhichao....@intel.com>
> > > > Sent: Friday, December 20, 2019 2:03 PM
> > > > To: Ni, Ray <ray...@intel.com>; devel@edk2.groups.io
> > > > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming
> > > > <liming....@intel.com>; Vitaly Cheptsov <vit9...@protonmail.com>
> > > > Subject: RE: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib:
> > > > Separate the lib instances
> > > >
> > > > Ray,
> > > >
> > > > I knew there is one in MdePkg. But it has duplicate code with
> > > > UefiDevicePathLib. That is why I add the Mandatory one.
> > > > And it is recommended to use the one in UefiDevicePathLib path.
> > > >
> > > > Thanks,
> > > > Zhichao
> > > >
> > > > > -----Original Message-----
> > > > > From: Ni, Ray
> > > > > Sent: Friday, December 20, 2019 1:50 PM
> > > > > To: devel@edk2.groups.io; Gao, Zhichao <zhichao....@intel.com>
> > > > > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao, Liming
> > > > > <liming....@intel.com>; Vitaly Cheptsov <vit9...@protonmail.com>
> > > > > Subject: RE: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib:
> > > > Separate
> > > > > the lib instances
> > > > >
> > > > > Zhichao,
> > > > > \MdePkg\Library\UefiDevicePathLibDevicePathProtocol\ contains
> > > > > the
> > > > version
> > > > > that hard-depends on the protocol.
> > > > > I don't think you need to add another version.
> > > > >
> > > > > Thanks,
> > > > > Ray
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of
> > > > > > Gao, Zhichao
> > > > > > Sent: Wednesday, December 18, 2019 10:11 AM
> > > > > > To: devel@edk2.groups.io
> > > > > > Cc: Kinney, Michael D <michael.d.kin...@intel.com>; Gao,
> > > > > > Liming <liming....@intel.com>; Vitaly Cheptsov
> > > > > > <vit9...@protonmail.com>
> > > > > > Subject: [edk2-devel] [PATCH V3 0/2] *MdePkg/UefiDevicePathLib:
> > > > > > Separate the lib instances
> > > > > >
> > > > > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2298
> > > > > >
> > > > > > The UefiDevicePathLibOptionalDevicePathProtocolConstructor's
> > > > > > implementation
> > > > > > isn't match with its instance name.
> > > > > > Remove the ASSERT and depex of the
> > > > gEfiDevicePathUtilitiesProtocolGuid
> > > > > > because of "Optional".
> > > > > >
> > > > > > Add a mandatory instance to force using the
> > > > > > DevicePathUtilities, DevicePathToText and DevicePathFromText
> > > > > > protocol with the ASSERT
> > > > and
> > > > > > depex.
> > > > > >
> > > > > > V2:
> > > > > > The optional lib instance's construction should return success
> > > > > > all the time.
> > > > > > Change the desciption of the optional lib uni file.
> > > > > > Change the copyright date of the mandatory one's uni file.
> > > > > >
> > > > > > V3:
> > > > > > Remove the Status variable in
> > > > > > UefiDevicePathLibOptionalDevicePathProtocolConstructor.
> > > > > > The Status would cause GCC build fail because the variable is
> > > > > > initialized but not used.
> > > > > > Since it is useless for the constructor, directly remove it.
> > > > > >
> > > > > > Cc: Michael D Kinney <michael.d.kin...@intel.com>
> > > > > > Cc: Liming Gao <liming....@intel.com>
> > > > > > Cc: Vitaly Cheptsov <vit9...@protonmail.com>
> > > > > > Signed-off-by: Zhichao Gao <zhichao....@intel.com>
> > > > > >
> > > > > > Zhichao Gao (2):
> > > > > >   MdePkg/UefiDevicePathLib: Separate the device path lib
> > > > > >   MdePkg/dsc: Add UefiDevicePathLibMandatoryDevicePathProtocol
> > for
> > > > > > build
> > > > > >
> > > > > >  ...DevicePathLibMandatoryDevicePathProtocol.c | 469
> > > > > > ++++++++++++++++++
> > > > > >  ...vicePathLibMandatoryDevicePathProtocol.inf |  86 ++++
> > > > > > ...vicePathLibMandatoryDevicePathProtocol.uni |  18 +
> > > > > > ...iDevicePathLibOptionalDevicePathProtocol.c |  21 +-
> > > > > >  ...evicePathLibOptionalDevicePathProtocol.inf |   5 +-
> > > > > >  ...evicePathLibOptionalDevicePathProtocol.uni |   6 +-
> > > > > >  MdePkg/MdePkg.dsc                             |   3 +-
> > > > > >  7 files changed, 587 insertions(+), 21 deletions(-)  create
> > > > > > mode
> > > > > > 100644
> > > > > >
> > > >
> > MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> > > > > > hProtocol.c
> > > > > >  create mode 100644
> > > > > >
> > > >
> > MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> > > > > > hProtocol.inf
> > > > > >  create mode 100644
> > > > > >
> > > >
> > MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibMandatoryDevicePat
> > > > > > hProtocol.uni
> > > > > >
> > > > > > --
> > > > > > 2.21.0.windows.1
> > > > > >
> > > > > >
> > > > > > 


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