Bug 2477712 - Review Request: json-schema-validator - Modern C++ JSON schema validator
Summary: Review Request: json-schema-validator - Modern C++ JSON schema validator
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: Package Review
Version: rawhide
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Ben Beasley
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 2477713
TreeView+ depends on / blocked
 
Reported: 2026-05-14 21:37 UTC by Jerry James
Modified: 2026-05-29 01:12 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-05-29 01:12:16 UTC
Type: ---
Embargoed:
code: fedora-review+


Attachments (Terms of Use)

Description Jerry James 2026-05-14 21:37:14 UTC
Spec URL: https://jjames.fedorapeople.org/json-schema-validator/json-schema-validator.spec
SRPM URL: https://jjames.fedorapeople.org/json-schema-validator/json-schema-validator-2.4.0-1.fc45.src.rpm
Fedora Account System Username: jjames
Description: This is a C++ library for validating JSON documents based on a JSON Schema which itself should validate with draft-7 of JSON Schema Validation.

I am willing to swap reviews.

Comment 1 Fedora Review Service 2026-05-14 21:41:17 UTC
Copr build:
https://copr.fedorainfracloud.org/coprs/build/10461263
(succeeded)

Review template:
https://download.copr.fedorainfracloud.org/results/@fedora-review/fedora-review-2477712-json-schema-validator/fedora-rawhide-x86_64/10461263-json-schema-validator/fedora-review/review.txt

Please take a look if any issues were found.


---
This comment was created by the fedora-review-service
https://github.com/FrostyX/fedora-review-service

If you want to trigger a new Copr build, add a comment containing new
Spec and SRPM URLs or [fedora-review-service-build] string.

Comment 2 Ben Beasley 2026-05-17 08:26:56 UTC
Package Review
==============

Legend:
[x] = Pass, [!] = Fail, [-] = Not applicable, [?] = Not evaluated

This is a pretty straightforward C++ shared library project. It’s interesting
that it has nlohman/ in the include path and nlohman_ in the library name when
Niels Lohmann isn’t the author. I guess this functions as a sort of “schema
validation extension for nlohmann_json,” and it makes sense that way.

Because the https://src.fedoraproject.org/rpms/json dependency is a header-only
library, guidelines require you to add a BuildRequires on json-static “for
tracking purposes;” this could be in addition to cmake(nlohmann_json), which is
otherwise a better way of writing the dependency.

https://docs.fedoraproject.org/en-US/packaging-guidelines/#_packaging_header_only_libraries

The other thing is that since we treat header-only libraries as a kind of
static library, their licenses need to be included in the License fields for
the binary packages. So something like this:

  # The entire source is MIT; the header-only json library dependency is
  # (MIT AND CC0-1.0), where the CC0-1.0 comes from bundled hedley.
  License:        MIT AND CC0-1.0

(Note: hedley’s use of CC0-1.0 for code is covered by the exception for
pre-existing files in Fedora,
https://gitlab.com/fedora/legal/fedora-license-data/-/blob/a0b86d16c0b6e1cacdd67a1f06382a663b1530eb/data/CC0-1.0.toml#L11-L14.
The json package bundles hedley, but we also have a standalone package
https://src.fedoraproject.org/rpms/hedley.)

Because the -devel package doesn’t include anything from the json dependency,
it can have its own License field that is just:

  # The -devel subpackage does not include anything from dependencies
  License:        MIT

…and *if* you like to use the SourceLicense field, then that would of course
still be just MIT.

Other than all of that pedantry around header-only dependencies, this looks
excellent. I had no idea we already had a declarative build system for CMake!
I’ll be using that myself.

You might consider packaging ChangeLog.md as documentation alongside README.md.
You could also consider adding “%doc example/” to the -devel subpackage.

===== MUST items =====

C/C++:
[x]: Package does not contain kernel modules.
[x]: If your application is a C or C++ application you must list a
     BuildRequires against gcc, gcc-c++ or clang.
[x]: ldconfig not called in %post and %postun for Fedora 28 and later.
[x]: Package does not contain any libtool archives (.la)
[x]: Package contains no static executables.
[x]: Rpath absent or only used for internal libs.
[x]: Development (unversioned) .so files in -devel subpackage, if present.

Generic:
[x]: Package is licensed with an open-source compatible license and meets
     other legal requirements as defined in the legal section of Packaging
     Guidelines.
[!]: License field in the package spec file matches the actual license.
     Note: Checking patched sources after %prep for licenses. Licenses
     found: "Unknown or generated", "MIT License", "*No copyright* MIT
     License". 175 files have unknown license. Detailed output of
     licensecheck in /home/ben/fedora/review/2477712-json-schema-
     validator/licensecheck.txt

     License field matches the source license, but we need to account for
     “static” header-only dependencies.

[x]: License file installed when any subpackage combination is installed.
[x]: %build honors applicable compiler flags or justifies otherwise.
[x]: Package contains no bundled libraries or specifies bundled libraries
     with Provides: bundled(<libname>) if unbundling is not possible.
[x]: Changelog in prescribed format.
[x]: Sources contain only permissible code or content.
[-]: Package contains desktop file if it is a GUI application.
[x]: Development files must be in a -devel package
[x]: Package uses nothing in %doc for runtime.
[x]: Package consistently uses macros (instead of hard-coded directory
     names).
[x]: Package is named according to the Package Naming Guidelines.
[x]: Package does not generate any conflict.
[x]: Package obeys FHS, except libexecdir and /usr/target.
[-]: If the package is a rename of another package, proper Obsoletes and
     Provides are present.
[x]: Requires correct, justified where necessary.

     Particularly, the arch-specific Requires on json-devel from the -devel
     subpackage is correct.

[x]: Spec file is legible and written in American English.
[-]: Package contains systemd file(s) if in need.
[x]: Useful -debuginfo package or justification otherwise.
[x]: Package is not known to require an ExcludeArch tag.
[-]: Large documentation must go in a -doc subpackage. Large could be size
     (~1MB) or number of files.
     Note: Documentation size is 11634 bytes in 1 files.
[x]: Package complies to the Packaging Guidelines
[x]: Package successfully compiles and builds into binary rpms on at least
     one supported primary architecture.
[x]: Package installs properly.
[x]: Rpmlint is run on all rpms the build produces.
     Note: There are rpmlint messages (see attachment).
[x]: If (and only if) the source package includes the text of the
     license(s) in its own file, then that file, containing the text of the
     license(s) for the package is included in %license.
[x]: The License field must be a valid SPDX expression.
[x]: Package requires other packages for directories it uses.
[x]: Package must own all directories that it creates.
[x]: Package does not own files or directories owned by other packages.
[x]: Package uses either %{buildroot} or $RPM_BUILD_ROOT
[x]: Package does not run rm -rf %{buildroot} (or $RPM_BUILD_ROOT) at the
     beginning of %install.
[x]: Macros in Summary, %description expandable at SRPM build time.
[x]: Dist tag is present.
[x]: Package does not contain duplicates in %files.
[x]: Permissions on files are set properly.
[x]: Package must not depend on deprecated() packages.
[x]: Package use %makeinstall only when make install DESTDIR=... doesn't
     work.
[x]: Package is named using only allowed ASCII characters.
[x]: Package does not use a name that already exists.
[x]: Package is not relocatable.
[x]: Sources used to build the package match the upstream source, as
     provided in the spec URL.
[x]: Spec file name must match the spec package %{name}, in the format
     %{name}.spec.
[x]: File names are valid UTF-8.
[x]: Packages must not store files under /srv, /opt or /usr/local

===== SHOULD items =====

Generic:
[-]: If the source package does not include license text(s) as a separate
     file from upstream, the packager SHOULD query upstream to include it.
[x]: Final provides and requires are sane (see attachments).
[x]: Package functions as described.

     (Tests pass.)

[x]: Latest version is packaged.
[x]: Package does not include license text files separate from upstream.
[-]: Sources are verified with gpgverify first in %prep if upstream
     publishes signatures.
     Note: gpgverify is not used.
[x]: Package should compile and build into binary rpms on all supported
     architectures.

     https://koji.fedoraproject.org/koji/taskinfo?taskID=145553059

[x]: %check is present and all tests pass.
[x]: Packages should try to preserve timestamps of original installed
     files.
[x]: Reviewer should test that the package builds in mock.
[x]: Buildroot is not present
[x]: Package has no %clean section with rm -rf %{buildroot} (or
     $RPM_BUILD_ROOT)
[x]: No file requires outside of /etc, /bin, /sbin, /usr/bin, /usr/sbin.
[x]: Fully versioned dependency in subpackages if applicable.
[x]: Packager, Vendor, PreReq, Copyright tags should not be in spec file
[x]: Sources can be downloaded from URI in Source: tag
[x]: SourceX is a working URL.
[x]: Spec use %global instead of %define unless justified.

===== EXTRA items =====

Generic:
[x]: Rpmlint is run on debuginfo package(s).
     Note: No rpmlint messages.
[x]: Rpmlint is run on all installed packages.
     Note: There are rpmlint messages (see attachment).
[x]: Large data in /usr/share should live in a noarch subpackage if package
     is arched.
[x]: Spec file according to URL is the same as in SRPM.


Rpmlint
-------
Checking: json-schema-validator-2.4.0-1.fc45.x86_64.rpm
          json-schema-validator-devel-2.4.0-1.fc45.x86_64.rpm
          json-schema-validator-2.4.0-1.fc45.src.rpm
============================ rpmlint session starts ============================
rpmlint: 2.8.0
configuration:
    /usr/lib/python3.14/site-packages/rpmlint/configdefaults.toml
    /etc/xdg/rpmlint/fedora-spdx-licenses.toml
    /etc/xdg/rpmlint/fedora.toml
    /etc/xdg/rpmlint/scoring.toml
    /etc/xdg/rpmlint/users-groups.toml
    /etc/xdg/rpmlint/warn-on-functions.toml
rpmlintrc: [PosixPath('/tmp/tmpmi47bmzu')]
checks: 32, packages: 3

json-schema-validator-devel.x86_64: W: no-documentation
 3 packages and 0 specfiles checked; 0 errors, 1 warnings, 21 filtered, 0 badness; has taken 0.2 s 




Rpmlint (debuginfo)
-------------------
Checking: json-schema-validator-debuginfo-2.4.0-1.fc45.x86_64.rpm
============================ rpmlint session starts ============================
rpmlint: 2.8.0
configuration:
    /usr/lib/python3.14/site-packages/rpmlint/configdefaults.toml
    /etc/xdg/rpmlint/fedora-spdx-licenses.toml
    /etc/xdg/rpmlint/fedora.toml
    /etc/xdg/rpmlint/scoring.toml
    /etc/xdg/rpmlint/users-groups.toml
    /etc/xdg/rpmlint/warn-on-functions.toml
rpmlintrc: [PosixPath('/tmp/tmpau4mk132')]
checks: 32, packages: 1

 1 packages and 0 specfiles checked; 0 errors, 0 warnings, 5 filtered, 0 badness; has taken 0.2 s 





Rpmlint (installed packages)
----------------------------
============================ rpmlint session starts ============================
rpmlint: 2.9.0
configuration:
    /usr/lib/python3.14/site-packages/rpmlint/configdefaults.toml
    /etc/xdg/rpmlint/fedora-spdx-licenses.toml
    /etc/xdg/rpmlint/fedora.toml
    /etc/xdg/rpmlint/scoring.toml
    /etc/xdg/rpmlint/users-groups.toml
    /etc/xdg/rpmlint/warn-on-functions.toml
checks: 32, packages: 3

json-schema-validator-devel.x86_64: W: no-documentation
 3 packages and 0 specfiles checked; 0 errors, 1 warnings, 23 filtered, 0 badness; has taken 0.2 s 



Source checksums
----------------
https://github.com/pboettch/json-schema-validator/archive/2.4.0/json-schema-validator-2.4.0.tar.gz :
  CHECKSUM(SHA256) this package     : 24cbb114609cc9b43d4018b8d03e082ff5d2f26f5dce8bd36538097267b63af9
  CHECKSUM(SHA256) upstream package : 24cbb114609cc9b43d4018b8d03e082ff5d2f26f5dce8bd36538097267b63af9


Requires
--------
json-schema-validator (rpmlib, GLIBC filtered):
    libc.so.6()(64bit)
    libgcc_s.so.1()(64bit)
    libgcc_s.so.1(GCC_3.0)(64bit)
    libgcc_s.so.1(GCC_3.3.1)(64bit)
    libm.so.6()(64bit)
    libstdc++.so.6()(64bit)
    libstdc++.so.6(CXXABI_1.3)(64bit)
    libstdc++.so.6(CXXABI_1.3.9)(64bit)
    rtld(GNU_HASH)

json-schema-validator-devel (rpmlib, GLIBC filtered):
    cmake-filesystem(x86-64)
    json-devel(x86-64)
    json-schema-validator(x86-64)
    libnlohmann_json_schema_validator.so.2()(64bit)



Provides
--------
json-schema-validator:
    json-schema-validator
    json-schema-validator(x86-64)
    libnlohmann_json_schema_validator.so.2()(64bit)

json-schema-validator-devel:
    cmake(nlohmann_json_schema_validator)
    json-schema-validator-devel
    json-schema-validator-devel(x86-64)



Generated by fedora-review 0.11.0 (05c5b26) last change: 2025-11-29
Command line :/usr/bin/fedora-review -b 2477712
Buildroot used: fedora-rawhide-x86_64
Active plugins: Generic, Shell-api, C/C++
Disabled plugins: Java, Ocaml, SugarActivity, R, Haskell, fonts, Python, PHP, Perl
Disabled flags: EXARCH, EPEL6, EPEL7, DISTTAG, BATCH

Comment 3 Jerry James 2026-05-18 22:06:07 UTC
Thanks for the review! I have taken all of your suggestions, and fixed the license field as indicated above.  The URLs are the same as before, but let's get another scratch build.

Comment 4 Jerry James 2026-05-18 22:06:18 UTC
[fedora-review-service-build]

Comment 5 Ben Beasley 2026-05-21 06:02:23 UTC
Thanks! The package is APPROVED by inspection of the spec-file diff, below. All defects are corrected and suggestions are implemented, and neither fedora-review nor rpmlint indicates any new issues.


--- ../../2477712-json-schema-validator/srpm-unpacked/json-schema-validator.spec        2026-
05-14 01:00:00.000000000 +0100
+++ srpm-unpacked/json-schema-validator.spec    2026-05-18 01:00:00.000000000 +0100
@@ -6,8 +6,12 @@
 Release:        %autorelease
 Summary:        Modern C++ JSON schema validator
 
-License:        MIT
+# The entire source is MIT; the header-only json library dependency is
+# (MIT AND CC0-1.0), where the CC0-1.0 comes from bundled hedley.
+License:        MIT AND CC0-1.0
+SourceLicense:  MIT
 URL:            https://github.com/pboettch/json-schema-validator
+VCS:            git:%{url}.git
 Source:         %{url}/archive/%{version}/%{name}-%{version}.tar.gz
 
 # See https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval
@@ -15,8 +19,8 @@
 BuildSystem:    cmake
 BuildOption(conf): -DJSON_VALIDATOR_BUILD_EXAMPLES:BOOL=OFF
 
-BuildRequires:  cmake(nlohmann_json)
 BuildRequires:  gcc-c++
+BuildRequires:  json-static
 
 %description
 This is a C++ library for validating JSON documents based on a JSON Schema
@@ -24,6 +28,7 @@
 
 %package        devel
 Summary:        Development files for json-schema-validator
+License:        MIT
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       json-devel%{?_isa}
 
@@ -35,11 +40,12 @@
 %autosetup
 
 %files
-%doc README.md
+%doc ChangeLog.md README.md
 %license LICENSE
 %{_libdir}/libnlohmann_json_schema_validator.so.2{,.*}

 %files devel
+%doc example/
 %{_includedir}/nlohmann/json-schema.hpp
 %{_libdir}/cmake/nlohmann_json_schema_validator/
 %{_libdir}/libnlohmann_json_schema_validator.so

Comment 6 Jerry James 2026-05-21 14:20:20 UTC
Thank you!

Comment 7 Fedora Admin user for bugzilla script actions 2026-05-21 14:21:57 UTC
The Pagure repository was created at https://src.fedoraproject.org/rpms/json-schema-validator
Monitoring:
Anitya project is accessible by this link 
`https://release-monitoring.org/project/21701`
 you can modify it manually.
Package wasn't created in Anitya, reason: `Bad Request, some necessary arguments were not provided.`.

Comment 8 Fedora Update System 2026-05-21 17:02:50 UTC
FEDORA-2026-88d7aba478 (json-schema-validator-2.4.0-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-88d7aba478

Comment 9 Fedora Update System 2026-05-22 01:10:23 UTC
FEDORA-2026-88d7aba478 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf install --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-88d7aba478 \*`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-88d7aba478

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 10 Fedora Update System 2026-05-29 01:12:16 UTC
FEDORA-2026-88d7aba478 (json-schema-validator-2.4.0-2.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.


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