#!/usr/bin/awk -f

# Usage borg diff ::$src $dst | borg-collect-diff [-v name=nameval] [-v echo=echoval]
# nameval: Prefix results with informational string
# echoval: Any combination of "a", "r", and "m", "l".
# "a", "r", and "m" print added, removed, and modified files unchanged.
# "l" forces line-bufferring, even if stdout is not a terminal.

BEGIN {
    r=0; a=0; m=0; total=0;
}

/^added/ {
    if(echo ~ /.*a.*/) {
        print $0;
        if(echo ~ /.*l.*/) {
            system("");
        }
    }
    a += 1;
}

/^removed/ {
    if(echo ~ /.*r.*/) {
        print $0;
        if(echo ~ /.*l.*/) {
            system("");
        }
    }
    r += 1
}

/^\s*\+/ {
    if(echo ~ /.*m.*/) {
        print $0;
        if(echo ~ /.*l.*/) {
            system("");
        }
    }
    m += 1;
}

{
    total += 1;
}

END {
    if(name) {
        name = name ":"
        print name, "a", a, "r", r, "m", m, "total", total; system("");
    } else {
        print "a", a, "r", r, "m", m, "total", total; system("");
    }
}