# Install dependencies as root:
su -c "apt install g++ make cmake mercurial pkg-config"
su -c "apt install libxerces-c-dev" # needed only for relpipe-in-xml module
su -c "apt install guile-2.2-dev"   # needed only for relpipe-tr-guile module; guile-2.0-dev also works but requires a patch (see below)

# Run rest of installation as a non-root user:
export RELPIPE_VERSION="v0.10"
export RELPIPE_SRC=~/src
export RELPIPE_BUILD=~/build
export RELPIPE_INSTALL=~/install
export PKG_CONFIG_PATH="$RELPIPE_INSTALL/lib/pkgconfig/:$PKG_CONFIG_PATH"
export PATH="$RELPIPE_INSTALL/bin:$PATH"

rm -rf "$RELPIPE_BUILD"/relpipe-*
mkdir -p "$RELPIPE_SRC" "$RELPIPE_BUILD" "$RELPIPE_INSTALL"

# Helper functions:
relpipe_download() { for m in "$@"; do cd "$RELPIPE_SRC" && ([[ -d "relpipe-$m.cpp" ]] && hg pull -R "relpipe-$m.cpp" && hg update -R "relpipe-$m.cpp" "$RELPIPE_VERSION" || hg clone -u "$RELPIPE_VERSION" https://hg.globalcode.info/relpipe/relpipe-$m.cpp) || break; done; }
relpipe_install()  { for m in "$@"; do cd "$RELPIPE_BUILD" && mkdir -p relpipe-$m.cpp && cd relpipe-$m.cpp && cmake -DCMAKE_INSTALL_PREFIX:PATH="$RELPIPE_INSTALL" "$RELPIPE_SRC/relpipe-$m.cpp" && make && make install || break; done; }

# Download all sources:
relpipe_download lib-protocol lib-reader lib-writer lib-cli lib-xmlwriter in-cli in-fstab in-xml in-csv in-filesystem out-gui.qt out-nullbyte out-ods out-tabular out-xml out-csv tr-cut tr-grep tr-python tr-sed tr-validator tr-guile

# Optional: At this point, we have all dependencies and sources downloaded, so we can disconnect this computer from the internet in order to verify that our build process is sane, deterministic and does not depend on any external resources.

# Build and install libraries:
relpipe_install lib-protocol lib-reader lib-writer lib-cli lib-xmlwriter

# Build and install tools:
relpipe_install in-fstab in-cli in-fstab in-xml in-csv tr-cut tr-grep tr-sed tr-guile out-nullbyte out-ods out-tabular out-xml out-csv

# relpipe_install in-filesystem # requires GCC 8 or patching (see below)

# Clean-up:
unset -f relpipe_install
unset -f relpipe_download
unset -v RELPIPE_VERSION
unset -v RELPIPE_SRC
unset -v RELPIPE_BUILD
unset -v RELPIPE_INSTALL

# Filter your your fstab using Guile Scheme and view it like on an 80s green screen terminal!
relpipe-in-fstab | relpipe-tr-guile --relation 'fstab' --where '(or (= $pass 1) (string= $type "swap") )' | relpipe-out-tabular