# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/(--([A-z\-]*?):(?<!--rgb:)).*?;/$1 #{$$$2};/gm;t' <<< " --color-primary: #0017a8;
--color-primary--rgb: #{hexToRGB(color-primary)};
--variablename: blabla blablabla;
--color-secondary: #0631ff;
--color-secondary--rgb: #{hexToRGB(color-secondary)};
--color-tertiary: #00ffe0;
--color-tertiary--rgb: #{hexToRGB(color-tertiary)};
--color-green-dark: #257426;
--color-green-dark--rgb: #{hexToRGB(color-green-dark)};
--font-family: TTCommons, Helvetica, Arial, sans-serif;
--transition: 0.3s ease;
--box-shadow: 0 0 12px 0 rgba(0, 0, 0, 0.3);"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html