Gettext/The- 002d 002dcolor-option
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9.11.1 The --color
option
The ‘--color=when
’ option specifies under which conditions
colorized output should be generated. The when
part can be one of
the following:
always
yes
- The output will be colorized.
never
no
- The output will not be colorized.
auto
tty
- The output will be colorized if the output device is a tty, i.e. when the output goes directly to a text screen or terminal emulator window.
html
- The output will be colorized and be in HTML format.
test
- This is a special value, understood only by the
msgcat
program. It is explained in the next section (The TERM variable).
‘--color
’ is equivalent to ‘--color=yes
’. The default is
‘--color=auto
’.
Thus, a command like ‘msgcat vi.po
’ will produce colorized output
when called by itself in a command window. Whereas in a pipe, such as
‘msgcat vi.po | less -R
’, it will not produce colorized output. To
get colorized output in this situation nevertheless, use the command
‘msgcat --color vi.po | less -R
’.
The ‘--color=html
’ option will produce output that can be viewed in
a browser. This can be useful, for example, for Indic languages,
because the renderic of Indic scripts in browsers is usually better than
in terminal emulators.
Note that the output produced with the --color
option is not
a valid PO file in itself. It contains additional terminal-specific escape
sequences or HTML tags. A PO file reader will give a syntax error when
confronted with such content. Except for the ‘--color=html
’ case,
you therefore normally don’t need to save output produced with the
--color
option in a file.
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