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Fix shell version when invoked from a script
When invoked from a shell script, `$(rbenv init -)` did not get the shell name correct. It needs to look at the `args` value from `ps`. Ref: https://github.com/yyuu/pyenv/issues/373
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@ -33,7 +33,7 @@ done
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shell="$1"
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if [ -z "$shell" ]; then
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shell="$(ps c -p "$PPID" -o 'ucomm=' 2>/dev/null || true)"
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shell="$(ps -p "$PPID" -o 'args=' 2>/dev/null || true)"
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shell="${shell##-}"
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shell="${shell%% *}"
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shell="${shell:-$SHELL}"
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