Procedure to build RPM

1. Prepare LCG_externals and LCG_generators .txt files: lcgjenkins/splitglobalsummary.py <release without LCG_> <platform> <compiler>

   • Downloads LCG_xx_<platform>.txt file, produced by CMake during build area configuration step, from EOS using HTTP
   • Reads it line by line, parses each line and reformats it
   • Writes the reformatted line to LCG_externals_<platform>.txt, if the line doesn't contain substring MCGenerators, or to LCG_generators_.txt otherwise.
   • Copies LCG_contrib_.txt file from /cvmfs/sft.cern.ch/lcg/releases to the build dir

2. Create externals.spec and generators.spec:

lcgjenkins/LCGRPM/package/createLCGRPMSpec.py LCG_externals_<platform>.txt -b ${WORKDIR}/packaging -o externals.spec --release <LCG_xx>

lcgjenkins/LCGRPM/package/createLCGRPMSpec.py LCG_generators_<platform>.txt -b ${WORKDIR}/packaging -o generators.spec --release <LCG_xx>

3. Build actual RPMs:

rpmbuild -bb externals.spec
rpmbuild -bb generators.spec

All RPMs created this way have some hardcoded properties:

Vendor: LHCb
License: GPL
Group: LCG
BuildArch: noarch
Distribution: whatever

(BuildArch is "target system architecture": x86_64, aarch, ppc ...; Distribution is "target system OS")

Release RPMs

Each release consists of:

• One "Externals master RPM" (LCG_xx_<platform>-1.0.0-xx.rpm), which is an empty RPM that depends on "link RPMs" for externals (LCG_xx_<package>_<version>_<platform>-1.0.0-xx.rpm), "externals meta RPM" (LCGMeta_xx_externals_<platform>-1.0.0-xx.rpm) and compiler (e.g. gcc_8.2.0_x86_64_slc6)
• One "Generators master RPM" (LCG_generators_xx_<platform>-1.0.0-xx.rpm), which is an empty RPM that depends on "link RPMs" for generators (LCG_xx_<package>_<version>_<platform>-1.0.0-xx.rpm), "generators meta RPM" (LCGMeta_xx_generators_<platform>-1.0.0-xx.rpm) and compiler (e.g. gcc_8.2.0_x86_64_slc6)
• One "externals meta RPM" that contains LCG_externals_<platform>.txt file and has no dependencies
• One "generators meta RPM" that contains LCG_generators_<platform>.txt file and has no dependencies
• A number of "link RPMs", each containing a symbolic link (from the unhashed version to the hashed one) and depending on "package RPM", "meta RPM" and "link RPM"s of the dependencies (including gcc/clang). This RPM also updates LCG_externals_<platform>.txt.installed or LCG_generators_<platform>.txt.installed (adds or removes line describing it's package)
• A number of "package RPMs", containing actual packages files in a "hashed" directory (<package>-<hash>) and depending on "package RPMs" of their dependencies (including gcc/clang)

The name of the package (as passed to yum install) consists of:

• LCG release (only for "link RPMs")
• Package name (e.g. ROOT)
• Package hash (only for "package RPMs")
• Package version
• Package platform (e.g. x86_64_slc6_gcc49_dbg)

The package version is always 1.0.0, and the revision is equal to the numeric part of the release name (except "Generators master RPM" in RPM-based releases, in which the revision of this RPM is incremented each time a new generator is built or rebuilt).

Example: ROOT version 6.18.00 for platform x86_64-centos7-gcc8-opt in release LCG_96

• Link RPM: LCG_96_ROOT_6.18.00_x86_64_centos7_gcc8_opt (/eos/project/l/lcg/www/lcgpackages/rpms_updates/LCG_96release/LCG_96_ROOT_6.18.00_x86_64_centos7_gcc8_opt-1.0.0-96.noarch.rpm)

$ rpm -qpR /eos/project/l/lcg/www/lcgpackages/rpms_updates/LCG_96release/LCG_96_ROOT_6.18.00_x86_64_centos7_gcc8_opt-1.0.0-96.noarch.rpm
ROOT-2459b_6.18.00_x86_64_centos7_gcc8_opt  
LCGMeta_96_externals_x86_64_centos7_gcc8_opt  
LCG_96_srm_ifce_1.13.0_0_x86_64_centos7_gcc8_opt  
LCG_96_blas_0.3.5.openblas_x86_64_centos7_gcc8_opt  
LCG_96_Vc_1.4.1_x86_64_centos7_gcc8_opt  
LCG_96_vdt_0.4.3_x86_64_centos7_gcc8_opt  
LCG_96_Davix_0.7.3_x86_64_centos7_gcc8_opt  
LCG_96_gl2ps_1.4.0_x86_64_centos7_gcc8_opt  
LCG_96_fftw_3.3.8_x86_64_centos7_gcc8_opt  
LCG_96_oracle_18.3.0.0.0_x86_64_centos7_gcc8_opt  
LCG_96_libxml2_2.9.9_x86_64_centos7_gcc8_opt  
LCG_96_numpy_1.16.4_x86_64_centos7_gcc8_opt  
LCG_96_gfal_1.13.0_0_x86_64_centos7_gcc8_opt  
LCG_96_mysql_5.7.26_x86_64_centos7_gcc8_opt  
LCG_96_zlib_1.2.11_x86_64_centos7_gcc8_opt  
LCG_96_tbb_2019_U7_x86_64_centos7_gcc8_opt  
LCG_96_Python_2.7.16_x86_64_centos7_gcc8_opt  
LCG_96_R_3.5.3_x86_64_centos7_gcc8_opt  
LCG_96_dcap_2.47.7_1_x86_64_centos7_gcc8_opt  
LCG_96_xrootd_4.9.1_x86_64_centos7_gcc8_opt  
LCG_96_GSL_2.5_x86_64_centos7_gcc8_opt  
LCG_96_gcc_8.2.0_x86_64_centos7  

• Package RPM: ROOT-885ca_6.18.00_x86_64_centos7_gcc8_opt (/eos/project/l/lcg/www/lcgpackages/rpms_updates/ROOT-885ca_6.18.00_x86_64_centos7_gcc8_opt-1.0.0-96.noarch.rpm)

$ rpm -qpR /eos/project/l/lcg/www/lcgpackages/rpms_updates/ROOT-2459b_6.18.00_x86_64_centos7_gcc8_opt-1.0.0-96.noarch.rpm 
srm_ifce-be254_1.13.0_0_x86_64_centos7_gcc8_opt  
blas-bb5ea_0.3.5.openblas_x86_64_centos7_gcc8_opt  
Vc-d25d4_1.4.1_x86_64_centos7_gcc8_opt  
vdt-992df_0.4.3_x86_64_centos7_gcc8_opt  
Davix-24bc8_0.7.3_x86_64_centos7_gcc8_opt  
gl2ps-30f0b_1.4.0_x86_64_centos7_gcc8_opt  
fftw-102c2_3.3.8_x86_64_centos7_gcc8_opt  
oracle-8593b_18.3.0.0.0_x86_64_centos7_gcc8_opt  
libxml2-3501e_2.9.9_x86_64_centos7_gcc8_opt  
numpy-a6af8_1.16.4_x86_64_centos7_gcc8_opt  
gfal-6fc75_1.13.0_0_x86_64_centos7_gcc8_opt  
mysql-c3e26_5.7.26_x86_64_centos7_gcc8_opt  
zlib-da225_1.2.11_x86_64_centos7_gcc8_opt  
tbb-ba3eb_2019_U7_x86_64_centos7_gcc8_opt  
Python-e553a_2.7.16_x86_64_centos7_gcc8_opt  
R-883db_3.5.3_x86_64_centos7_gcc8_opt  
dcap-cdd28_2.47.7_1_x86_64_centos7_gcc8_opt  
xrootd-51b64_4.9.1_x86_64_centos7_gcc8_opt  
GSL-32fc5_2.5_x86_64_centos7_gcc8_opt  
gcc_8.2.0_x86_64_centos7