26 lines
1.2 KiB
Markdown
26 lines
1.2 KiB
Markdown
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# Architecture
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## Overview
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Single-file tool — entire application logic lives in `main.go`.
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- **`main()`**: Parses flags (`-sep`, `-enc`, `-o`), iterates over input CSV files, creates one Excel sheet per file using the filename (without extension) as the sheet name, writes all rows, saves the output `.xlsx`.
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- **`detectDelimiter()`**: Auto-detects the CSV delimiter by counting `;`, `,`, and `\t` occurrences in the first line. Falls back to `;` on error.
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Key behaviors:
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- Sheet names are truncated to 31 characters (Excel limit)
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- Encoding `windows1252` wraps the file reader with a Windows-1252 decoder
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- `csvReader.LazyQuotes = true` for tolerance with malformed CSV files
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- The first sheet renames "Sheet1"; subsequent sheets are created fresh
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## Version Injection
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Version info is injected at build time via ldflags from git tags:
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- `internal/version.Version` — from `git describe --tags --always`
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- `internal/version.Commit` — from `git rev-parse --short HEAD`
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- `internal/version.BuildDate` — from `date -u`
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## Dependencies
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- `github.com/xuri/excelize/v2` — Excel file creation/manipulation
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- `golang.org/x/text` — Character encoding (Windows-1252 support)
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