maurice/snix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Improve filtering of ANSI escape sequences in build logs

Browse source 
All ANSI sequences except color setting are now filtered out. In
particular, terminal resets (such as from NixOS VM tests) are filtered
out.

Also, fix the completely broken tab character handling.
This commit is contained in:
Eelco Dolstra 2018-02-07 15:19:10 +01:00
parent cfdfad5c34
commit 84989d3af2
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
6 changed files with 53 additions and 71 deletions
Download patch file Download diff file Expand all files Collapse all files

65
src/libutil/util.cc
View file

@ -1178,36 +1178,51 @@ void ignoreException()
}
string filterANSIEscapes(const string & s, bool nixOnly)
std::string filterANSIEscapes(const std::string & s, unsigned int width)
{
string t, r;
enum { stTop, stEscape, stCSI } state = stTop;
for (auto c : s) {
if (state == stTop) {
if (c == '\e') {
state = stEscape;
r = c;
} else
t += c;
} else if (state == stEscape) {
r += c;
if (c == '[')
state = stCSI;
else {
t += r;
state = stTop;
std::string t, e;
size_t w = 0;
auto i = s.begin();
while (w < (size_t) width && i != s.end()) {
if (*i == '\e') {
std::string e;
e += *i++;
char last = 0;
if (i != s.end() && *i == '[') {
e += *i++;
// eat parameter bytes
while (i != s.end() && *i >= 0x30 && *i <= 0x3f) e += *i++;
// eat intermediate bytes
while (i != s.end() && *i >= 0x20 && *i <= 0x2f) e += *i++;
// eat final byte
if (i != s.end() && *i >= 0x40 && *i <= 0x7e) e += last = *i++;
} else {
if (i != s.end() && *i >= 0x40 && *i <= 0x5f) e += *i++;
}
} else {
r += c;
if (c >= 0x40 && c <= 0x7e) {
if (nixOnly && (c != 'p' && c != 'q' && c != 's' && c != 'a' && c != 'b'))
t += r;
state = stTop;
r.clear();
if (last == 'm')
t += e;
}
else if (*i == '\t') {
i++; t += ' '; w++;
while (w < (size_t) width && w % 8) {
t += ' '; w++;
}
}
else if (*i == '\r')
// do nothing for now
;
else {
t += *i++; w++;
}
}
t += r;
return t;
}