Release v0.10
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We are pleased to introduce you the new version of Relational pipes. This release brings Guile support and some minor changes:
-
Guile transformations:
the new tool
relpipe-tr-guileintegrates GNU Guile and allows writing filters (WHERE-like conditions) and transformations (SELECT-like projections) in the Scheme language. Filter could look like e.g.--where '(or (= $size 666) (= $size 1984) )'. See the examples page for details. - ODS output: Integer attributes are now generated with proper data type, so e.g. in LibreOffice they are recognized as numbers instead of strings.
- CSV output: Now generates CRLF line-ends (as defined in RFC 4180).
-
Filesystem input:
Now allows custom relation names (option:
--relation). And default xattr namespace is nowuserso the attribute names do not have to be prefixed withuser..
Data types
- boolean ~ since v0.8
- variable unsigned integer (prototype) ~ since v0.8
- string in UTF-8 ~ since v0.8
Inputs
- XML ~ since v0.9
- CSV ~ since v0.9
- file system ~ since v0.9
- CLI ~ since v0.8
- fstab ~ since v0.8
Transformations
- guile: filtering and transformations defined in the Scheme language using GNU Guile
- grep: regular expression filter, removes unwanted records from the relation ~ since v0.8
- cut: regular expression attribute cutter (removes or duplicates attributes and can also DROP whole relation) ~ since v0.8
- sed: regular expression replacer ~ since v0.8
- validator: just a pass-through filter that crashes on invalid data ~ since v0.8
- python: highly experimental ~ since v0.8
Outputs
- CSV ~ since v0.9
- tabular ~ since v0.8
- XML ~ since v0.8
- nullbyte ~ since v0.8
- GUI in Qt ~ since v0.8
- ODS (LibreOffice) ~ since v0.8
Instalation was tested on Debian GNU/Linux 9.6. The process should be similar on other distributions.
# Install dependencies as root:
su -c "apt install g++ make cmake mercurial pkg-config"
su -c "apt install libxerces-c-dev" # needed only for relpipe-in-xml module
su -c "apt install guile-2.2-dev" # needed only for relpipe-tr-guile module; guile-2.0-dev also works but requires a patch (see below)
# Run rest of installation as a non-root user:
export RELPIPE_VERSION="v0.10"
export RELPIPE_SRC=~/src
export RELPIPE_BUILD=~/build
export RELPIPE_INSTALL=~/install
export PKG_CONFIG_PATH="$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= $type "swap") )' | relpipe-out-tabular
Download: examples/release-v0.10.sh
Relational pipes are modular thus you can download and install only parts you need (the libraries are needed always).
Tools out-gui.qt and tr-python require additional libraries and are not built by default.
The module relpipe-in-filesystem uses C++ filesystem API which is supported since GCC 8.
This module can be compiled and seems usable even with GCC 6, but requires some patching (switch to the experimental API):
sed 's@#include <filesystem>@#include <experimental/filesystem>@g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FileAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/XattrAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FilesystemCommand.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/AttributeFinder.h
sed 's@std::filesystem@std::experimental::filesystem@g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FileAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/XattrAttributeFinder.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/FilesystemCommand.h "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/AttributeFinder.h
sed 's/.*PROPERTY CXX_STANDARD.*/#\0/g' -i "$RELPIPE_SRC"/relpipe-in-filesystem.cpp/src/CMakeLists.txt
The module relpipe-tr-guile uses GNU Guile 2.2 but can also work with 2.0.
In such case, it requires this patch:
sed 's/guile-2\.2/guile-2.0/g' -i "$RELPIPE_SRC"/relpipe-tr-guile.cpp/src/CMakeLists.txt
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