For the foreseeable future, the exploration of the high-energy frontier will be the domain of the Large Hadron Collider (LHC). Of particular significance will be its high-luminosity upgrade (HL-LHC), which will operate until the mid- 2030s. In this endeavour, for the full exploitation of the HL-LHC physics potential an improved understanding of the parton distribution functions (PDFs) of the proton is critical. Since its start of data taking, the LHC has provided an impressive wealth of information on the quark and gluon structure of the proton. Indeed, modern global analyses of parton distribution functions (PDFs) include a wide range of LHC measurements of processes such as the production of jets, electroweak gauge bosons, and top quark pairs. Here we provide quantitative projections for global PDF fits that include the information expected from the High-Luminosity LHC (HL-LHC) in the LHAPDF format. These projections have been already used in particular in the HL-LHC CERN Yellow Reports. The HL-LHC program would be uniquely complemented by the proposed Large Hadron electron Collider (LHeC), a high-energy lepton-proton and lepton-nucleus collider based at CERN. Here we also present PDF projections based on the expected LHeC measurements of inclusive and heavy quark structure functions. These projections are presented both for the LHeC individually, and also in connection with the HL-LHC pseudo-data. The list of LHAPDF sets that is made available in this repository are the following: PDF4LHC15_nnlo_hllhc_scen1_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1 and also by the LHeC pseudo-data. PDF4LHC15_nnlo_hllhc_scen2_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2 and also by the LHeC pseudo-data. PDF4LHC15_nnlo_hllhc_scen3_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3 and also by the LHeC pseudo-data. PDF4LHC15_nnlo_lhec.tgz : Based on the PDF4LHC15 global fit supplemented by the LHeC pseudo-data. PDF4LHC15_nnlo_hllhc_scen1.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 1. PDF4LHC15_nnlo_hllhc_scen2.tgz : Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 2. PDF4LHC15_nnlo_hllhc_scen3.tgz Based on the PDF4LHC15 global fit supplemented by HL-LHC pseudo-data in Scenario 3.