Guile-DSV is a GNU Guile module for working with the delimiter-separated values (DSV) data format.
Guile-DSV supports the Unix-style DSV format and RFC 4180 format.
Also Guile-DSV ships with a program named dsv (source code is here:
utils/dsv.in) that allows to read and process DSV format (including
delimiter change and conversion from one standard to another.)
Note that if you want to use Guile-DSV from an environment where syslog is
unavailable, then you must set the log-driver option for dsv->scm to
“file” or “none” to prevent it from trying to log messages to the syslog. See
the Texinfo documentation for details.
- GNU Guile 2.0.12+
- Guile Library 0.1.9+
- Guile-SMC 0.6.2+
- Texinfo (contains
makeinfotool that is required for making the documentation in Texinfo format) - Texlive (also is needed for documentation.)
- help2man
$ guix install guile-dsv
$ git clone https://github.com/artyom-poptsov/guile-dsv.git $ cd guile-dsv $ autoreconf -vif $ ./configure --prefix=/usr $ make -j$(nproc) $ sudo make install
For a basic explanation of the installation of the package, see the INSTALL file.
Please note that you will need Automake 1.12 or later to run
self-tests with make check (but the library itself can be built with
older Automake version such as 1.11).
important You probably want to call configure with the
--with-guilesitedir option so that this package is installed in
Guile’s default path. But, if you don’t know where your Guile site
directory is, run configure without the option, and it will give you
a suggestion.
$ dsv --help
Usage: dsv [options] [file]
The default behavior of the program is to print a formatted table from a
<file> to stdout. The options listed below can be used to change or modify
this behavior.
When no <file> is provided, dsv reads data from stdin.
Options:
--help, -h Print this message and exit.
--summary, -s Print summary information for a file.
--delimiter, -D <delim> Set a delimiter.
--guess-delimiter, -d Guess a file delimiter and print the result.
--number, -n Number rows and columns.
--width, -w <width> Wrap long lines of text inside cells to fit the table
into the specified width. If with is specified as
"auto" (default value) then current terminal width
is used.
When the required width is too small for the table
wrapping, an error will be issued.
Zero width means no wrapping so the table might not
fit into the screen.
--map-cell, -m <code> Apply an arbitrary Scheme code on each cell value
before printing.
There are three variables that can be used in the code:
- $value -- current cell value.
- $row -- current row number
- $col -- current column number.
Code examples:
'(if (> $value 0) $value 0)'
'(string-append "\"" $value "\"")'
Note that the code must return a string, that in turn
will be printed in a cell.
--filter-row, -f <code> Keep only rows for which CODE returns #t.
There are two variables that can be used in the code:
- $value -- current row content.
- $row -- current row number.
For example with this code Guile-DSV keeps only rows
that are 5 columns in length:
'(= (length $value) 5)'
--filter-column, -c <procedure>
Keep only columns for which PROCEDURE returns #t.
There are two variables that can be used in the code:
- $value -- current column content as a list.
- $row -- current column number.
For example with this code Guile-DSV keeps only the 2nd
column from the input data:
'(= $col 2)'
--file-format, -F <fmt> Set a file format. Possible formats are:
"unix" (default), "rfc4180"
--with-header, -H Use the first row of a table as a header when
printing the table to the screen.
--table-borders, -b <spec> Set table borders for printing. The value can be
either a borders specification or a preset name.
Spec can be a comma-separated list of key=value
pairs that specify the table style. The list of
possible keys can be found below
(see "Table parameters".)
Also a table preset name can be used as the value.
See "Table presets" below.
Table preset parameters can be overridden by specifying
extra parameters after the preset name. E.g.:
"graphic,bs=3;31"
Example values:
- "v=|,h=-,j=+"
- org
--table-presets-path <path>
Set the table preset path.
This option can be also set by
"GUILE_DSV_TABLE_PRESETS_PATH" environment
variable.
Default value: /gnu/store/448pzfcwaaa8smrrdbn1shmk45s7agwx-guile-dsv-git/share/guile-dsv/presets/
--to, -t <fmt> Convert a file to a specified format, write
the result to stdout.
--to-delimiter, -T <delim> Convert delimiters to the specified variant.
When this option is not used, default delimiters
for the chosen output format will be used.
--version Print information about Guile-DSV version.
--debug Enable state machine debugging.
Table parameters:
bt border-top The top border.
btl border-top-left The top left corner.
btr border-top-right The top right corner.
btj border-top-joint The top border joint.
bl border-left The left table border.
blj border-left-joint The left table border joint.
br border-right The right table border.
brj border-right-joint The right table border joint.
bb border-bottom The bottom border.
bbl border-bottom-left The left corner of the bottom border.
bbr border-bottom-right The right corner of the bottom border.
bbj border-bottom-joint The bottom border joint.
bs border-style The style of the borders ("fg;bg".)
ts text-style The text style ("fg;bg".)
s shadow The table shadow.
so shadow-offset The table shadow offset in format "x;y" (e.g. "2;2".)
ss shadow-style The style of the shadow ("fg;bg".)
rs row-separator The table row separator.
rj row-joint The row joint.
cs column-separator The table column separator
hs header-style The header style ("fg;bg".)
ht header-top The header top border.
htl header-top-left The header top left border.
htr header-top-right The header top right border.
htj header-top-joint The header top joint.
hl header-left The header left border.
hr header-right The header right border.
hcs header-column-separator The header column separator.
hb header-bottom The header bottom border.
hbl header-bottom-left The header bottom left corner.
hbr header-bottom-right The header bottom right border.
hbj header-bottom-joint The header bottom joint.
Table presets:
ascii
graphic-bold
graphic-double
graphic
graphic-with-shadow
markdown
org
To show DSV files (Unix-style) in human-readable manner, just invoke the tool like this:
$ head -4 /etc/passwd | dsv root x 0 0 root /root /bin/bash daemon x 1 1 daemon /usr/sbin /usr/sbin/nologin bin x 2 2 bin /bin /usr/sbin/nologin sys x 3 3 sys /dev /usr/sbin/nologin
Show a DSV file as a fancy table with custom borders:
$ head -4 /etc/passwd | dsv -b "rs=-,cs=|,rj=+" root | x | 0 | 0 | root | /root | /bin/bash --------+---+---+---+--------+-----------+------------------- daemon | x | 1 | 1 | daemon | /usr/sbin | /usr/sbin/nologin --------+---+---+---+--------+-----------+------------------- bin | x | 2 | 2 | bin | /bin | /usr/sbin/nologin --------+---+---+---+--------+-----------+------------------- sys | x | 3 | 3 | sys | /dev | /usr/sbin/nologin
The same output but with box-drawing characters:
$ head -4 /etc/passwd | dsv -b "rs=─,cs=│,rj=┼" root │ x │ 0 │ 0 │ root │ /root │ /bin/bash ────────┼───┼───┼───┼────────┼───────────┼─────────────────── daemon │ x │ 1 │ 1 │ daemon │ /usr/sbin │ /usr/sbin/nologin ────────┼───┼───┼───┼────────┼───────────┼─────────────────── bin │ x │ 2 │ 2 │ bin │ /bin │ /usr/sbin/nologin ────────┼───┼───┼───┼────────┼───────────┼─────────────────── sys │ x │ 3 │ 3 │ sys │ /dev │ /usr/sbin/nologin
There are table presets that can be used to draw tables with specified border styles. Some examples:
$ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "ascii" .--------------. | a | b | c | |----+----+----| | a1 | b1 | c1 | |----+----+----| | a2 | b2 | c2 | '--------------' $ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "ascii" --with-header .--------------. | a | b | c | |====+====+====| | a1 | b1 | c1 | |----+----+----| | a2 | b2 | c2 | '--------------'
$ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "graphic" ┌────┬────┬────┐ │ a │ b │ c │ ├────┼────┼────┤ │ a1 │ b1 │ c1 │ ├────┼────┼────┤ │ a2 │ b2 │ c2 │ └────┴────┴────┘ $ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "graphic-bold" ┏━━━━┳━━━━┳━━━━┓ ┃ a ┃ b ┃ c ┃ ┣━━━━╋━━━━╋━━━━┫ ┃ a1 ┃ b1 ┃ c1 ┃ ┣━━━━╋━━━━╋━━━━┫ ┃ a2 ┃ b2 ┃ c2 ┃ ┗━━━━┻━━━━┻━━━━┛ $ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "graphic-double" ╔════╦════╦════╗ ║ a ║ b ║ c ║ ╠════╬════╬════╣ ║ a1 ║ b1 ║ c1 ║ ╠════╬════╬════╣ ║ a2 ║ b2 ║ c2 ║ ╚════╩════╩════╝
This is the preset that allows to generate org-mode tables from CSV/DSV data.
$ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "org" | a | b | c | | a1 | b1 | c1 | | a2 | b2 | c2 | $ echo -e "a,b,c\na1,b1,c1\na2,b2,c2\n" | dsv -b "org" --with-header | a | b | c | |----+----+----| | a1 | b1 | c1 | | a2 | b2 | c2 |
$ dsv -d /etc/passwd :
$ dsv -s /etc/passwd File: /etc/passwd Format: unix Delimiter: ':' (0x3a) Records: 50 column width 1 19 2 1 3 5 4 5 5 34 6 26 7 17
From Unix DSV to RFC4180:
$ dsv -t rfc4180 /etc/passwd | head -4 root,x,0,0,root,/root,/bin/bash daemon,x,1,1,daemon,/usr/sbin,/usr/sbin/nologin bin,x,2,2,bin,/bin,/usr/sbin/nologin sys,x,3,3,sys,/dev,/usr/sbin/nologin
Convert delimiters:
$ dsv -t unix -T "|" /etc/passwd | head -4 root|x|0|0|root|/root|/bin/bash daemon|x|1|1|daemon|/usr/sbin|/usr/sbin/nologin bin|x|2|2|bin|/bin|/usr/sbin/nologin sys|x|3|3|sys|/dev|/usr/sbin/nologin
Wrap each table value in double quotes:
dsv -m '(string-append "\"" $value "\"")' /etc/group
Remove 2nd row from a table:
$ dsv -f '(not (= $row 1))' /etc/passwd
Remove 2nd column from a table:
$ dsv -f '(not (= $col 1))' /etc/passwd
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