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Add command line option --print-gaproot #4465

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merged 2 commits into from
May 11, 2021
Merged

Add command line option --print-gaproot #4465

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a4650ce
added the command line option `--print-gaproot`
ThomasBreuer May 6, 2021
4236a76
address @fingolfin's comments
ThomasBreuer May 11, 2021
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15 changes: 15 additions & 0 deletions lib/system.g
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Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,7 @@ BIND_GLOBAL( "GAPInfo", rec(
CommandLineOptionData := [
rec( short:= "h", long := "help", default := false, help := ["print this help and exit"] ),
rec( long := "version", default := false, help := ["print the GAP version and exit"] ),
rec( long := "print-gaproot", default := false, help := ["print the primary GAP root and exit"] ),
rec( short:= "b", long := "banner", default := false, help := ["disable/enable the banner"] ),
rec( short:= "q", long := "quiet", default := false, help := ["enable/disable quiet mode"] ),
rec( short:= "e", default := false, help := ["disable/enable quitting on <ctrl>-D"] ),
Expand Down Expand Up @@ -485,6 +486,20 @@ CallAndInstallPostRestore( function()
"\n" );
QuitGap();
fi;

# Evaluate the '--print-gaproot' option.
if GAPInfo.CommandLineOptions.( "print-gaproot" ) then
for line in GAPInfo.RootPaths do
value:= SHALLOW_COPY_OBJ( line );
APPEND_LIST_INTR( value, "sysinfo.gap" );
if IsExistingFile( value ) then
PRINT_TO( "*stdout*", line );
QuitGap(0);
fi;
od;
PRINT_TO( "*errout*", "failed to determine primary GAP root" );
QuitGap(1);
fi;
end );


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