[bug] PkgConfigDeps error

[ericLemanissier]

Environment Details (include every applicable attribute)

• Operating System+version: Windows/Linux
• Compiler+version:*
• Conan version: 1.38.0
• Python version: 3.8.0/3.8.5

Steps to reproduce (Include if Applicable)

conanfiletxt:

[requires]
glib/2.69.0
[generators]
PkgConfigDeps

Logs (Executed commands with output) (Include/Attach if Applicable)

$ conan install .
Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++
compiler.version=9
os=Linux
os_build=Linux
cmake:build_type=Release
ninja:build_type=Release
[options]
[build_requires]
[env]

conanfile.txt: Installing package
Requirements
    bzip2/1.0.8 from 'conan-center' - Cache
    glib/2.69.0 from 'conan-center' - Cache
    libelf/0.8.13 from 'conan-center' - Cache
    libffi/3.3 from 'conan-center' - Cache
    libmount/2.36 from 'conan-center' - Cache
    libselinux/3.1 from 'conan-center' - Cache
    pcre/8.44 from 'conan-center' - Cache
    pcre2/10.37 from 'conan-center' - Cache
    zlib/1.2.11 from 'conan-center' - Cache
Packages
    bzip2/1.0.8:da606cf731e334010b0bf6e85a2a6f891b9f36b0 - Cache
    glib/2.69.0:0385e7273c0d55fb125e44f6a019048e475655f4 - Cache
    libelf/0.8.13:6af9cc7cb931c5ad942174fd7838eb655717c709 - Cache
    libffi/3.3:6af9cc7cb931c5ad942174fd7838eb655717c709 - Cache
    libmount/2.36:6af9cc7cb931c5ad942174fd7838eb655717c709 - Cache
    libselinux/3.1:6b0384e3aaa343ede5d2bd125e37a0198206de42 - Cache
    pcre/8.44:5a9dce922eb15fddb52dd3f1ac71ae033f4e570d - Cache
    pcre2/10.37:3b544e62795c293d95ba624360f2fc91ca32ce44 - Cache
    zlib/1.2.11:6af9cc7cb931c5ad942174fd7838eb655717c709 - Cache

Installing (downloading, building) binaries...
bzip2/1.0.8: Already installed!
bzip2/1.0.8: Appending PATH environment variable: /home/eric/.conan/data/bzip2/1.0.8/_/_/package/da606cf731e334010b0bf6e85a2a6f891b9f36b0/bin
libelf/0.8.13: Already installed!
libffi/3.3: Already installed!
libmount/2.36: Already installed!
zlib/1.2.11: Already installed!
pcre/8.44: Already installed!
pcre/8.44: Appending PATH environment variable: /home/eric/.conan/data/pcre/8.44/_/_/package/5a9dce922eb15fddb52dd3f1ac71ae033f4e570d/bin
pcre2/10.37: Already installed!
pcre2/10.37: Appending PATH environment variable: /home/eric/.conan/data/pcre2/10.37/_/_/package/3b544e62795c293d95ba624360f2fc91ca32ce44/bin
libselinux/3.1: Already installed!
glib/2.69.0: Already installed!
glib/2.69.0: Appending PATH env var with: /home/eric/.conan/data/glib/2.69.0/_/_/package/0385e7273c0d55fb125e44f6a019048e475655f4/bin
conanfile.txt: Generator txt created conanbuildinfo.txt
conanfile.txt: Generator 'PkgConfigDeps' calling 'generate()'
ERROR: Error in generator 'PkgConfigDeps': {'ref': pcre/unknown@unknown/unknown, 'build': False, 'direct': True}

When using conanfile.py, the log is more detailed:

Calling generate()
Traceback (most recent call last):
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conans/errors.py", line 34, in conanfile_exception_formatter
    yield
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conans/client/generators/__init__.py", line 226, in write_toolchain
    conanfile.generate()
  File "/home/conan/.conan/data/fluidsynth/2.1.9/bincrafters/stable/export/conanfile.py", line 151, in generate
    pkgconf.generate()
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conan/tools/gnu/pkgconfigdeps.py", line 190, in generate
    generator_files = self.content
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conan/tools/gnu/pkgconfigdeps.py", line 88, in content
    components = self._get_components(dep.ref.name, dep)
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conan/tools/gnu/pkgconfigdeps.py", line 63, in _get_components
    comp_requires_gennames.append(self._get_require_comp_name(pkg_name, require))
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conan/tools/gnu/pkgconfigdeps.py", line 53, in _get_require_comp_name
    req = self._conanfile.dependencies.direct_host[pkg]
  File "/opt/pyenv/versions/3.7.5/lib/python3.7/site-packages/conans/model/dependencies.py", line 68, in __getitem__
    return self._data[r]
KeyError: {'ref': pcre/unknown@unknown/unknown, 'build': False, 'direct': True}

[franramirez688]

Hi @ericLemanissier
Thanks for reporting the issue. I'm performing another local test because it seemed a bug (sorry for being too much fast) but it could be a problem in the recipe. Let me be sure before tagging it again as a bug or whatever.