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excelize
Go language library for reading and writing Microsoft Excelâ„¢ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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unioffice
Pure go library for creating and processing Office Word (.docx), Excel (.xlsx) and Powerpoint (.pptx) documents (by 5andr0)
Edit: I googled excel formula parser and find it https://github.com/xuri/efp
Yeah, I'm reading it now and just parse, I didn't find a implementation of "calculation engine" all the available libs just read previous saved value from a opened and calculated excel file. See: https://github.com/qax-os/excelize/issues/65
Component Object Model or OLE Here's a go library https://github.com/go-ole/go-ole