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Dynamic warning if babel or pygments are not installed

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This commit is contained in:
Johann Dreo 2014-02-10 21:05:21 +01:00
commit 796246e789
2 changed files with 23 additions and 7 deletions
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4
README.md
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@ -44,7 +44,7 @@ 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 python-pygments library is installed, you can use the name of a
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
@ -58,7 +58,7 @@ 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 python-pygments library is available, `colout` can be used as an interface
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,

26
colout/colout.py
View file

@ -666,10 +666,17 @@ def __args_parse__(argv, usage=""):
parser.add_argument("pattern", metavar="REGEX", type=str, nargs=1,
help="A regular expression")
pygments_warn=" You can also use a language name to activate syntax coloring (see `-r all` for a list)."
try:
import pygments
except ImportError:
pygments_warn=" (WARNING: python3-pygments is not available, \
install it if you want to be able to use syntax coloring)"
parser.add_argument("color", metavar="COLOR", type=str, nargs='?',
default="red",
help="A number in [0…255], a color name, a colormap name, \
a palette or a comma-separated list of those values.")
a palette or a comma-separated list of those values."+pygments_warn)
parser.add_argument("style", metavar="STYLE", type=str, nargs='?',
default="bold",
@ -682,9 +689,18 @@ def __args_parse__(argv, usage=""):
parser.add_argument("-c", "--colormap", action="store_true",
help="Use the given colors as a colormap (cycle the colors at each match)")
babel_warn=" (numbers will be parsed according to your locale)"
try:
# babel is a specialized module
import babel.numbers
except ImportError:
babel_warn=" (WARNING: python3-babel is not available, install it \
if you want to be able to parse numbers according to your locale)"
parser.add_argument("-l", "--scale",
help="When using the 'scale' colormap, parse matches as decimal numbers (taking your locale into account) \
and apply the rainbow colormap linearly between the given SCALE=min,max")
help="When using the 'scale' colormap, parse matches as decimal numbers \
and apply the rainbow colormap linearly between the given SCALE=min,max" + babel_warn)
parser.add_argument("-a", "--all", action="store_true",
help="Color the whole input at once instead of line per line \
@ -815,9 +831,9 @@ if __name__ == "__main__":
print("NO COLORMAPS")
if len(lexers) > 0:
print("LEXERS: %s" % ", ".join(lexers) )
print("SYNTAX COLORING: %s" % ", ".join(lexers) )
else:
print("NO LEXER")
print("NO SYNTAX COLORING (check that python3-pygments is installed)")
sys.exit(0) # not an error, we asked for help