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ConsulWatcher/config/setindent.js

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// Inspired by dedent: https://github.com/dmnd/dedent
function setIndent(indentOrValue, value = null)
{
let indent;
if (typeof indentOrValue === 'number')
indent = indentOrValue;
else
{
indent = 0;
value = indentOrValue;
}
const lines = value.split('\n');
let minIndent = null;
// Determine minimum indent present in the value
for (const line of lines)
{
const whitespace = line.match(/^(\s+)/);
if (whitespace !== null)
minIndent = minIndent === null ? whitespace[1].length : Math.min(whitespace[1].length, minIndent);
}
// Calculate the difference to the requested indentation
const indentDelta = minIndent === null ? indent : minIndent - indent;
let result;
if (indentDelta < 0)
{
const add = ' '.repeat(-indentDelta);
result = lines.map(line => add + line).join('\n');
}
else
result = lines.map(line => line.slice(indentDelta)).join('\n');
// If the first or last line is empty, trim it (allows the template string to
// start at the next line to align properly). Similarly, if the last line is
// only whitespace, keep the newline but trim the spaces.
return result.replace(/^\n/g, '').replace(/[ \t]+$/g, '');
}
module.exports = setIndent;