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Webconfig: Don't outright abort if curses can't be imported

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We only need the curses module to look up sgr0, bold and underline
sequences.

Since those are going to be the xterm versions 90% of the time, we can
simply use those if this fails.

Fixes #8487.
This commit is contained in:
Fabian Homborg 2021-11-27 09:53:11 +01:00
parent 6f7b80e5b4
commit 5a71d02d32
1 changed files with 28 additions and 16 deletions
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44
share/tools/web_config/webconfig.py
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@ -508,25 +508,37 @@ g_special_escapes_dict = None
def get_special_ansi_escapes():
global g_special_escapes_dict
if g_special_escapes_dict is None:
import curses
try:
import curses
g_special_escapes_dict = {}
curses.setupterm()
g_special_escapes_dict = {}
curses.setupterm()
# Helper function to get a value for a tparm
def get_tparm(key):
val = None
key = curses.tigetstr(key)
if key:
val = curses.tparm(key)
if val:
val = val.decode("utf-8")
return val
# Helper function to get a value for a tparm
def get_tparm(key):
val = None
key = curses.tigetstr(key)
if key:
val = curses.tparm(key)
if val:
val = val.decode("utf-8")
return val
# Just a few for now
g_special_escapes_dict["exit_attribute_mode"] = get_tparm("sgr0")
g_special_escapes_dict["bold"] = get_tparm("bold")
g_special_escapes_dict["underline"] = get_tparm("smul")
# Just a few for now
g_special_escapes_dict["exit_attribute_mode"] = get_tparm("sgr0")
g_special_escapes_dict["bold"] = get_tparm("bold")
g_special_escapes_dict["underline"] = get_tparm("smul")
except ImportError:
print("WARNING: The python curses module is missing.")
print("WARNING: Falling back to xterm-256color settings.")
print("WARNING: Rebuild python with curses headers!")
g_special_escapes_dict = {
'exit_attribute_mode': '\x1b(B\x1b[m',
'bold': '\x1b[1m',
'underline': '\x1b[4m'
}
pass
return g_special_escapes_dict