Hi,

We need to keep an eye on some factors which the current prototype ignores. Some that come to my mind:

1. which component shall be the owner of sw dependency info? (Documentation, cmake, something else?). 2. how does the solution scale? (i.e. be able to handle platform specific dependencies). 3. how we handle build configuration specific dependencies? (i.e. if I don't build a service then some dependency is not needed). 4. As Minos mentioned some environment verification is already done by CMake. Is it worth to extract all dependency info (tooling + SW) into a dedicated place?

/George

-----Original Message----- From: TF-M tf-m-bounces@lists.trustedfirmware.org On Behalf Of Minos Galanakis via TF-M Sent: 21 October 2019 16:47 To: tf-m@lists.trustedfirmware.org Cc: nd nd@arm.com Subject: Re: [TF-M] Python script to generate tf-m dependencies in JSON format

Hi,

Making CMAKE able to output the dependencies it is expecting is the quickest path, but it is only able to resolve a subset of the requirements captured by the documenation. .https://ci.trustedfirmware.org/job/tf-m-build-test-nightly/lastSuccessfulBuild/artifact/build-docs/tf-m_documents/install/doc/user_guide/html/docs/user_guides/tfm_sw_requirement.html For example the cmake version itself, or tools like srec_cat used to produce MUSCA binaries. There are certain dependencies that are provided by other means ( package managers ) .

So while I agree that it looks quite odd, it is hierarchically the origin of the information we are trying to capture.

Minos ________________________________ From: TF-M tf-m-bounces@lists.trustedfirmware.org on behalf of Kumar Gala via TF-M tf-m@lists.trustedfirmware.org Sent: 21 October 2019 15:25 To: Devaraj Ranganna Devaraj.Ranganna@arm.com Cc: tf-m@lists.trustedfirmware.org tf-m@lists.trustedfirmware.org Subject: Re: [TF-M] Python script to generate tf-m dependencies in JSON format

This feels backwards, parsing rst to determine build steps, dependancies doesn’t feel correct. I think it would be better to codify the build steps in scripts of CMake, etc than reference those in the .rst instead.

- k

On Oct 21, 2019, at 9:03 AM, Devaraj Ranganna via TF-M tf-m@lists.trustedfirmware.org wrote:

Hi,

Currently tf-m dependencies are only listed in documentation file (docs/user_guides/tfm_build_instruction.rst) and there is no option to programmatically retrieve it. In order to integrate tf-m into non-secure side RTOSes, it is very essential to be able build tf-m automatically without manual intervention (may be as part of CI).

The tf-m CI build system uses fixed values for dependencies and it is the responsibility of developers who update the dependencies to update the documentation and the CI build system.

If non-secure side RTOSes use fix values for tf-m dependencies then either build or regression tests may fail when tf-m updates dependencies. In order avoid this issue, I’m proposing the following

• Use a reStructuredText grid table to define dependencies
• Python script to produce a json file in the root directory when invoked as standalone script or to return a json string when imported into another python script

I’ve created a patch set (https://review.trustedfirmware.org/c/trusted-firmware-m/+/2333) with above changes. I’d appreciate your inputs/feedback on this proposal.

This will also ensure that dependencies are captured in one place (docs/user_guides/tfm_build_instruction.rst).

Additionally, have another python script as “post-checkout” git hook which can parse dependencies in JSON format and clone them automatically when tf-m repository is cloned or when switching from master to feature branch and vice versa.

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