Color Up Arbitrary Command Output.
Project description
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Description: colout(1) -- Color Up Arbitrary Command Output
==============================================
## SYNOPSIS
`colout` [-h] [-r RESOURCE]
`colout` [-g] [-c] [-l min,max] [-a] [-t] [-T DIR] [-P DIR] [-d COLORMAP] [-s] [--debug] PATTERN [COLOR(S) [STYLE(S)]]
## DESCRIPTION
`colout` read lines of text stream on the standard input and output characters
matching a given regular expression *PATTERN* in given *COLOR* and *STYLE*.
If groups are specified in the regular expression pattern, only them are taken
into account, else the whole matching pattern is colored.
You can specify several colors or styles when using groups by separating them
with commas. If you indicate more colors than groups, the last ones will be ignored.
If you ask for fewer colors, the last one will be duplicated across remaining
groups.
Available colors are: blue, black, yellow, cyan, green, magenta, white, red,
rainbow, random, Random, Spectrum, spectrum, scale, Scale, hash, Hash, none, an
RGB hexadecimal triplet (`#11aaff`, for example) or any number between 0 and 255.
Available styles are: normal, bold, faint, italic, underline, blink,
rapid\_blink, reverse, conceal or random (some styles may have no effect, depending
on your terminal).
`rainbow` will cycle over a the default colormap at each matching pattern.
`Rainbow` will do the same over the default colormap for the 256-colors mode
(this requires a terminal that supports the 256 color escape sequences).
`Random` will color each matching pattern with a random color among the default colormap
(the 255 available in the ANSI table, by default).
`random` will do the same in 8 colors mode.
`spectrum` and `Spectrum` are like rainbows, but with more colors (8 and 36
colors).
`scale` (8 colors) and `Scale` (256 colors) will parse the numbers characters in
the matching text as a decimal number and apply the default colormap according
to its position on the scale defined by the `-l` option (see below, "0,100" by
default).
`hash` (8 colors) and `Hash` (256 colors) will take a fingerprint of the matching
text and apply the default colormap according to it. This ensure that matching
texts appearing several times will always get the same color.
Before interpreting the matched string as a number, colout will remove any
character not supposed to be used to write down numbers. This permits to apply
this special color on a large group, while interpreting only its numerical part.
If the python3-pygments library is installed, you can use the name of a
syntax-coloring "lexer" as a color (for example: "Cpp", "ruby", "xml+django", etc.).
If GIMP palettes files (\*.gpl) are available, you can also use their names as a
colormap (see the `-P` switch below).
Note that the RGB colors (either the hex triplets or the palettes's colors) will
be converted to their nearest ANSI 256 color mode equivalents.
When not specified, a *COLOR* defaults to _red_ and a *STYLE* defaults to _bold_.
`colout` comes with some predefined themes to rapidly color well-known outputs
(see the `-t` switch below).
If the python3-pygments library is available, `colout` can be used as an interface
to it (see also the `-s` switch below).
To have a list of all colors, styles, special colormaps, themes, palettes and lexers,
use the `-r` switch (see below).
`colout` is released under the GNU Public License v3.
## INSTALLATION
sudo python3 setup.py install
and then soft link `/usr/local/bin/colout` to your colout.py under your installation
directory, which is usually something like
/usr/local/lib/python3/dist-packages/colout-0.1-py3.egg/colout/colout.py
## OTHER INSTALLATION METHOD
Pypi (the Python Package Index)
sudo pip install colout
or
sudo easy_install colout
Ubuntu 13.04's ppa
sudo add-apt-repository ppa:ciici123/colout
sudo apt-get update
sudo apt-get/aptitude install colout
Gentoo
sudo emerge colout
## OPTIONS
* `-h`, `--help`:
Show a help message and exit
* `-g`, `--groups`:
For color maps (like "rainbow"), iterate over matching groups in the pattern instead of over patterns.
* `-c`, `--colormap`:
Use the given list of comma-separated colors as a colormap (cycle the colors at each match).
* `-l min,max`, `--scale min,max`:
When using the 'scale' colormap, parse matches as decimal numbers (taking your locale into account)
or as arithmetic expression (like "1+2/0.9\*3") and apply the rainbow colormap linearly
between the given min,max (0,100, by default).
* `-a`, `--all`:
Color the whole input at once instead of line per line
(really useful for coloring a source code file with strings on multiple lines).
* `-t`, `--theme`:
Interpret PATTERN as a predefined theme (perm, cmake, g++, etc.).
* `-T DIR`, `--themes-dir DIR`:
Search for additional themes (colout\_\*.py files) in this directory.
* `-P DIR`, `--palettes-dir DIR`:
Search for additional palettes (\*.gpl files) in this directory.
* `-d COLORMAP`, `--default COLORMAP`:
When using special colormaps (`random`, `scale` or `hash`), use this COLORMAP instead of the default one.
This can be either one of the available colormaps or a comma-separated list of colors.
WARNING: be sure to specify a default colormap that is compatible with the special colormap's mode,
or else the colors may not appear the same.
Also, external palettes are converted from RGB to 256-ANSI and will thus not work if you use
them as default colormaps for a 8-colors mode special color.
* `-r TYPE(S)`, `--resources TYPE(S)`:
Print the names of available resources. Use a comma-separated list of resources names
(styles, colors, special, themes, palettes, colormaps or lexers),
use 'all' to print everything.
* `-s`, `--source`:
Interpret PATTERN as source code readable by the Pygments library. If the first letter of PATTERN
is upper case, use the 256 color mode, if it is lower case, use the 8 colors mode.
In 256 color mode, interpret COLOR as a Pygments style (e.g. "default").
* `--debug`:
Debug mode: print what's going on internally, if you want to check what features are available.
## REGULAR EXPRESSIONS
A regular expression (or _regex_) is a pattern that describes a set of strings
that matches it.
`colout` understands regex as specified in the _re_ python module. Given that
`colout` is generally called by the command line, you may have to escape
special characters that would be recognize by your shell.
## DEPENDENCIES
Recommended packages:
* `argparse` for a usable arguments parsing
* `pygments` for the source code syntax coloring
* `babel` for a locale-aware number parsing
## LIMITATIONS
Don't use nested groups or colout will duplicate the corresponding input text
with each matching colors.
Using a default colormap that is incompatible with the special colormap's mode
will end badly.
## EXAMPLES
### Simple
* Color in bold red every occurrence of the word _color_ in colout sources:
`cat colout.py | colout color red bold`
* Color in bold violet home directories in _/etc/passwd_:
`colout '/home/[a-z]+' 135 < /etc/passwd`
* Color in yellow user/groups id, in bold green name and in bold red home directories in _/etc/passwd_:
`colout ':x:([0-9]+:[0-9]+):([^:]+).*(/home/[a-z]+)' yellow,green,red normal,bold < /etc/passwd`
* Color in yellow file permissions with read rights for everyone:
`ls -l | colout '.(r.-){3}' yellow normal`
* Color in green read permission, in bold red write and execution ones:
`ls -l | colout '(r)(w*)(x*)' green,red normal,bold`
* Color in green comments in colout sources:
`colout '.*(#.*)$' green normal < colout.py`
* Color in bold green every numbers and in bold red the words _error_ in make output:
`make 2>&1 | colout '[0-9]+' green normal | colout error`
### Somewhat useful
* Use a different color for each line of the auth log
`grep user /var/log/auth.log | colout "^.*$" rainbow`
* Color each line of a file with a different color among a 256 color gradient from cyan to green:
`head /var/log/auth.log | colout -c "^.*$" 39,38,37,36,35,34`
* Color permissions with a predefined template:
`ls -l | colout -t perm`
* Color in light green comments in non-empty colout sources, with the sharp in bold green:
`grep -v '^\s*$' colout.py | colout '.*(#)(.*)$' green,119 bold,normal`
* Color a make output, line numbers in yellow, errors in bold red, warning in magenta, pragma in green and C++ file base names in cyan:
`make 2>&1 | colout ':([0-9]+):[0-9]*' yellow normal | colout error | colout warning magenta | colout pragma green normal | colout '/(\w+)*\.(h|cpp)' cyan normal`
Or using themes:
`make 2>&1 | colout -t cmake | colout -t g++`
* Color each word in the head of auth.log with a rainbow color map, starting a new colormap at each new line (the
beginning of the command is just bash magic to repeat the string "(\\w+)\\W+":
`L=$(seq 10) ; P=${L//??/(\\w+)\\W+} ; head /var/log/auth.log | colout -g "^${P}(.*)$" rainbow`
* Color source code in 8 colors mode, without seeing comments:
`cat colout.py | grep -v "#" | colout -s python`
* Color source code in 256 color mode:
`cat colout.py | colout -s Python monokai`
* Color a JSON stream:
`echo '{"foo": "lorem", "bar":"ipsum"}' | python -mjson.tool | colout -t json`
* Color a source code substring:
`echo "There is an error in 'static void Functor::operator()( EOT& indiv ) { return indiv; }' you should fix it" | colout "'(.*)'" Cpp monokai`
* Color the percent of progress part of a CMake's makefile output, with a color
related to the value of the progress (from 0%=blue to 100%=red):
`cmake .. && make | colout "^(\[\s*[0-9]+%\])" Scale`
* Color hosts and users in `auth.log`, with consistent colors:
`cat /var/log/auth.log | colout "^(\S+\s+){3}(\S+)\s(\S+\s+){3}(\S+)\s+(\S+\s+){2}(\S+)\s*" none,hash,none,hash,none,hash`
### Bash alias
The following bash function color the output of any command with the
cmake and g++ themes:
function cm()
{
set -o pipefail
$@ 2>&1 | colout -t cmake | colout -t g++
}
You then can use the `cm` alias as a prefix to your build command,
for example: `cm make test`
### Themes
You can easily add your own theme to colout.
A theme is basically a module with a function named `theme` that take the configuration context as an argument and
return back the (modified) context and a list of triplets.
Each triplet figures the same arguments than those of the command line interface.
def theme(context):
return context,[ [regexp, colors, styles] ]
With the context dictionary at hand, you have access to the internal configuration of colout, you can thus change colormaps for
special keywords, the scale, even the available colors, styles or themes.
See the cmake theme for how to modify an existing colormap if (and only if) the user didn't ask for an
alternative one.
See the ninja theme for how to extend an existing theme with more regexps and a different configuration.
See the gcc theme for an example of how to use the localization of existing softwares to build translated regexp.
### Buffering
Note that when you use colout within real time streams (like `tail -f X | qrep Y | colout Y`) of commands,
you may observe that the lines are printed by large chunks and not one by one, in real time.
This is not due to colout but to the buffering behavior of your shell.
To fix that, use `stdbuf`, for example: `tail -f X | stdbuf -o0 grep Y | colout Y`.
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Description: colout(1) -- Color Up Arbitrary Command Output
==============================================
## SYNOPSIS
`colout` [-h] [-r RESOURCE]
`colout` [-g] [-c] [-l min,max] [-a] [-t] [-T DIR] [-P DIR] [-d COLORMAP] [-s] [--debug] PATTERN [COLOR(S) [STYLE(S)]]
## DESCRIPTION
`colout` read lines of text stream on the standard input and output characters
matching a given regular expression *PATTERN* in given *COLOR* and *STYLE*.
If groups are specified in the regular expression pattern, only them are taken
into account, else the whole matching pattern is colored.
You can specify several colors or styles when using groups by separating them
with commas. If you indicate more colors than groups, the last ones will be ignored.
If you ask for fewer colors, the last one will be duplicated across remaining
groups.
Available colors are: blue, black, yellow, cyan, green, magenta, white, red,
rainbow, random, Random, Spectrum, spectrum, scale, Scale, hash, Hash, none, an
RGB hexadecimal triplet (`#11aaff`, for example) or any number between 0 and 255.
Available styles are: normal, bold, faint, italic, underline, blink,
rapid\_blink, reverse, conceal or random (some styles may have no effect, depending
on your terminal).
`rainbow` will cycle over a the default colormap at each matching pattern.
`Rainbow` will do the same over the default colormap for the 256-colors mode
(this requires a terminal that supports the 256 color escape sequences).
`Random` will color each matching pattern with a random color among the default colormap
(the 255 available in the ANSI table, by default).
`random` will do the same in 8 colors mode.
`spectrum` and `Spectrum` are like rainbows, but with more colors (8 and 36
colors).
`scale` (8 colors) and `Scale` (256 colors) will parse the numbers characters in
the matching text as a decimal number and apply the default colormap according
to its position on the scale defined by the `-l` option (see below, "0,100" by
default).
`hash` (8 colors) and `Hash` (256 colors) will take a fingerprint of the matching
text and apply the default colormap according to it. This ensure that matching
texts appearing several times will always get the same color.
Before interpreting the matched string as a number, colout will remove any
character not supposed to be used to write down numbers. This permits to apply
this special color on a large group, while interpreting only its numerical part.
If the python3-pygments library is installed, you can use the name of a
syntax-coloring "lexer" as a color (for example: "Cpp", "ruby", "xml+django", etc.).
If GIMP palettes files (\*.gpl) are available, you can also use their names as a
colormap (see the `-P` switch below).
Note that the RGB colors (either the hex triplets or the palettes's colors) will
be converted to their nearest ANSI 256 color mode equivalents.
When not specified, a *COLOR* defaults to _red_ and a *STYLE* defaults to _bold_.
`colout` comes with some predefined themes to rapidly color well-known outputs
(see the `-t` switch below).
If the python3-pygments library is available, `colout` can be used as an interface
to it (see also the `-s` switch below).
To have a list of all colors, styles, special colormaps, themes, palettes and lexers,
use the `-r` switch (see below).
`colout` is released under the GNU Public License v3.
## INSTALLATION
sudo python3 setup.py install
and then soft link `/usr/local/bin/colout` to your colout.py under your installation
directory, which is usually something like
/usr/local/lib/python3/dist-packages/colout-0.1-py3.egg/colout/colout.py
## OTHER INSTALLATION METHOD
Pypi (the Python Package Index)
sudo pip install colout
or
sudo easy_install colout
Ubuntu 13.04's ppa
sudo add-apt-repository ppa:ciici123/colout
sudo apt-get update
sudo apt-get/aptitude install colout
Gentoo
sudo emerge colout
## OPTIONS
* `-h`, `--help`:
Show a help message and exit
* `-g`, `--groups`:
For color maps (like "rainbow"), iterate over matching groups in the pattern instead of over patterns.
* `-c`, `--colormap`:
Use the given list of comma-separated colors as a colormap (cycle the colors at each match).
* `-l min,max`, `--scale min,max`:
When using the 'scale' colormap, parse matches as decimal numbers (taking your locale into account)
or as arithmetic expression (like "1+2/0.9\*3") and apply the rainbow colormap linearly
between the given min,max (0,100, by default).
* `-a`, `--all`:
Color the whole input at once instead of line per line
(really useful for coloring a source code file with strings on multiple lines).
* `-t`, `--theme`:
Interpret PATTERN as a predefined theme (perm, cmake, g++, etc.).
* `-T DIR`, `--themes-dir DIR`:
Search for additional themes (colout\_\*.py files) in this directory.
* `-P DIR`, `--palettes-dir DIR`:
Search for additional palettes (\*.gpl files) in this directory.
* `-d COLORMAP`, `--default COLORMAP`:
When using special colormaps (`random`, `scale` or `hash`), use this COLORMAP instead of the default one.
This can be either one of the available colormaps or a comma-separated list of colors.
WARNING: be sure to specify a default colormap that is compatible with the special colormap's mode,
or else the colors may not appear the same.
Also, external palettes are converted from RGB to 256-ANSI and will thus not work if you use
them as default colormaps for a 8-colors mode special color.
* `-r TYPE(S)`, `--resources TYPE(S)`:
Print the names of available resources. Use a comma-separated list of resources names
(styles, colors, special, themes, palettes, colormaps or lexers),
use 'all' to print everything.
* `-s`, `--source`:
Interpret PATTERN as source code readable by the Pygments library. If the first letter of PATTERN
is upper case, use the 256 color mode, if it is lower case, use the 8 colors mode.
In 256 color mode, interpret COLOR as a Pygments style (e.g. "default").
* `--debug`:
Debug mode: print what's going on internally, if you want to check what features are available.
## REGULAR EXPRESSIONS
A regular expression (or _regex_) is a pattern that describes a set of strings
that matches it.
`colout` understands regex as specified in the _re_ python module. Given that
`colout` is generally called by the command line, you may have to escape
special characters that would be recognize by your shell.
## DEPENDENCIES
Recommended packages:
* `argparse` for a usable arguments parsing
* `pygments` for the source code syntax coloring
* `babel` for a locale-aware number parsing
## LIMITATIONS
Don't use nested groups or colout will duplicate the corresponding input text
with each matching colors.
Using a default colormap that is incompatible with the special colormap's mode
will end badly.
## EXAMPLES
### Simple
* Color in bold red every occurrence of the word _color_ in colout sources:
`cat colout.py | colout color red bold`
* Color in bold violet home directories in _/etc/passwd_:
`colout '/home/[a-z]+' 135 < /etc/passwd`
* Color in yellow user/groups id, in bold green name and in bold red home directories in _/etc/passwd_:
`colout ':x:([0-9]+:[0-9]+):([^:]+).*(/home/[a-z]+)' yellow,green,red normal,bold < /etc/passwd`
* Color in yellow file permissions with read rights for everyone:
`ls -l | colout '.(r.-){3}' yellow normal`
* Color in green read permission, in bold red write and execution ones:
`ls -l | colout '(r)(w*)(x*)' green,red normal,bold`
* Color in green comments in colout sources:
`colout '.*(#.*)$' green normal < colout.py`
* Color in bold green every numbers and in bold red the words _error_ in make output:
`make 2>&1 | colout '[0-9]+' green normal | colout error`
### Somewhat useful
* Use a different color for each line of the auth log
`grep user /var/log/auth.log | colout "^.*$" rainbow`
* Color each line of a file with a different color among a 256 color gradient from cyan to green:
`head /var/log/auth.log | colout -c "^.*$" 39,38,37,36,35,34`
* Color permissions with a predefined template:
`ls -l | colout -t perm`
* Color in light green comments in non-empty colout sources, with the sharp in bold green:
`grep -v '^\s*$' colout.py | colout '.*(#)(.*)$' green,119 bold,normal`
* Color a make output, line numbers in yellow, errors in bold red, warning in magenta, pragma in green and C++ file base names in cyan:
`make 2>&1 | colout ':([0-9]+):[0-9]*' yellow normal | colout error | colout warning magenta | colout pragma green normal | colout '/(\w+)*\.(h|cpp)' cyan normal`
Or using themes:
`make 2>&1 | colout -t cmake | colout -t g++`
* Color each word in the head of auth.log with a rainbow color map, starting a new colormap at each new line (the
beginning of the command is just bash magic to repeat the string "(\\w+)\\W+":
`L=$(seq 10) ; P=${L//??/(\\w+)\\W+} ; head /var/log/auth.log | colout -g "^${P}(.*)$" rainbow`
* Color source code in 8 colors mode, without seeing comments:
`cat colout.py | grep -v "#" | colout -s python`
* Color source code in 256 color mode:
`cat colout.py | colout -s Python monokai`
* Color a JSON stream:
`echo '{"foo": "lorem", "bar":"ipsum"}' | python -mjson.tool | colout -t json`
* Color a source code substring:
`echo "There is an error in 'static void Functor::operator()( EOT& indiv ) { return indiv; }' you should fix it" | colout "'(.*)'" Cpp monokai`
* Color the percent of progress part of a CMake's makefile output, with a color
related to the value of the progress (from 0%=blue to 100%=red):
`cmake .. && make | colout "^(\[\s*[0-9]+%\])" Scale`
* Color hosts and users in `auth.log`, with consistent colors:
`cat /var/log/auth.log | colout "^(\S+\s+){3}(\S+)\s(\S+\s+){3}(\S+)\s+(\S+\s+){2}(\S+)\s*" none,hash,none,hash,none,hash`
### Bash alias
The following bash function color the output of any command with the
cmake and g++ themes:
function cm()
{
set -o pipefail
$@ 2>&1 | colout -t cmake | colout -t g++
}
You then can use the `cm` alias as a prefix to your build command,
for example: `cm make test`
### Themes
You can easily add your own theme to colout.
A theme is basically a module with a function named `theme` that take the configuration context as an argument and
return back the (modified) context and a list of triplets.
Each triplet figures the same arguments than those of the command line interface.
def theme(context):
return context,[ [regexp, colors, styles] ]
With the context dictionary at hand, you have access to the internal configuration of colout, you can thus change colormaps for
special keywords, the scale, even the available colors, styles or themes.
See the cmake theme for how to modify an existing colormap if (and only if) the user didn't ask for an
alternative one.
See the ninja theme for how to extend an existing theme with more regexps and a different configuration.
See the gcc theme for an example of how to use the localization of existing softwares to build translated regexp.
### Buffering
Note that when you use colout within real time streams (like `tail -f X | qrep Y | colout Y`) of commands,
you may observe that the lines are printed by large chunks and not one by one, in real time.
This is not due to colout but to the buffering behavior of your shell.
To fix that, use `stdbuf`, for example: `tail -f X | stdbuf -o0 grep Y | colout Y`.
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