Github user jwadamson commented on the issue:
https://github.com/apache/ant/pull/24
I see a couple options:
1) we can continue playing with sed, but probably should use `printf '%s'
"$X"` instead of echo to pipe the input to avoid issues with trailing newlines
and echo interpretation.
2) use several ${X/Y/Z} replacement patterns. (doing backslash first so as
not to double-encode that)
I think #2 is probably simpler going forward. Do we know if this is posix
and supported across platforms?
esc_arg="${arg}"
esc_arg="${esc_arg/\\/\\\\}" # must be first since later patterns
introduce backslash chars
esc_arg="${esc_arg/\$/\\\$}"
esc_arg="${esc_arg/\"/\\\"}"
esc_arg="${esc_arg/\`/\\\`}"
quoted_arg="\"$esc_arg\""
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