Use TeX Live 2020 instead of 2017

Author: valentjn

.travis.texlive-profile

@@ -0,0 +1,31 @@
+selected_scheme scheme-basic
+TEXDIR /home/travis/local/share/texlive
+TEXMFCONFIG /home/travis/.texlive/texmf-config
+TEXMFHOME /home/travis/.texmf
+TEXMFLOCAL /home/travis/local/share/texlive/texmf-local
+TEXMFSYSCONFIG /home/travis/local/share/texlive/texmf-config
+TEXMFSYSVAR /home/travis/local/share/texlive/texmf-var
+TEXMFVAR /home/travis/.texlive/texmf-var
+binary_x86_64-linux 1
+collection-binextra 1
+collection-langgerman 1
+collection-latex 1
+collection-luatex 1
+instopt_adjustpath 0
+instopt_adjustrepo 1
+instopt_letter 0
+instopt_portable 0
+instopt_write18_restricted 1
+tlpdbopt_autobackup 1
+tlpdbopt_backupdir tlpkg/backups
+tlpdbopt_create_formats 1
+tlpdbopt_desktop_integration 1
+tlpdbopt_file_assocs 1
+tlpdbopt_generate_updmap 0
+tlpdbopt_install_docfiles 0
+tlpdbopt_install_srcfiles 0
+tlpdbopt_post_code 1
+tlpdbopt_sys_bin /usr/local/bin
+tlpdbopt_sys_info /usr/local/share/info
+tlpdbopt_sys_man /usr/local/share/man
+tlpdbopt_w32_multi_user 1

.travis.yml

@@ -1,37 +1,25 @@
 os: "linux"
 dist: "bionic"
-
 language: "minimal"
 
 addons:
   apt:
     update: true
     packages:
       - "scons"
-      - "texlive-fonts-extra"
-      - "texlive-lang-cyrillic"
-      - "texlive-lang-german"
-      - "texlive-latex-extra"
-      - "texlive-luatex"
-      - "texlive-plain-generic"
-      - "texlive-science"
 
 install:
-  # update KOMA-Script and etoc packages as TeX Live 2017 is too old
-  - "mkdir tmp && cd tmp"
-  - "wget https://svwh.dl.sourceforge.net/project/koma-script/KOMA-Script/koma-script-3511.zip"
-  - "unzip koma-script-3511.zip"
-  - "rm koma-script-3511.zip"
-  - "sudo mv * /usr/local/share/texmf/"
-  - "wget http://mirrors.ctan.org/macros/latex/contrib/etoc.zip"
-  - "unzip etoc.zip"
-  - "cd etoc"
-  - "etex etoc.dtx"
-  - "sudo mkdir -p /usr/local/share/texmf/tex/latex/etoc"
-  - "sudo mv etoc.sty /usr/local/share/texmf/tex/latex/etoc/"
-  - "cd .. && rm -r etoc"
-  - "sudo texhash"
-  - "cd .. && rm -r tmp"
+  # list of packages (heavily modified output of "\RequirePackage{snapshot}")
+  - "export PACKAGES='bbm bbm-macros booktabs cancel charter chemgreek courier cyrillic dashrule enumitem epstopdf esint esvect etoc floatflt fontaxes framed gofonts ifmtarg import koma-script lastpage listings ly1 mathdesign mathtools mhchem microtype multirow silence siunitx snapshot translator ulem xcharter xcolor xkeyval xpatch xstring xypic'"
+  - "wget https://ftp.tu-chemnitz.de/pub/tug/historic/systems/texlive/2020/install-tl-unx.tar.gz"
+  - "tar -xzf install-tl-unx.tar.gz"
+  - "rm -f install-tl-unx.tar.gz"
+  - "cd install-tl*"
+  - "./install-tl \"--profile=$TRAVIS_BUILD_DIR/.travis.texlive-profile\""
+  - "cd .."
+  - "rm -rf install-tl*"
+  - "export PATH=\"/home/travis/local/share/texlive/bin/x86_64-linux:$PATH\""
+  - "tlmgr install $PACKAGES"
 
 script:
   - "/usr/bin/env python3 $(which scons) -j $(nproc)"