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35 lines
1.9 KiB
Bash
35 lines
1.9 KiB
Bash
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#!/usr/bin/env bash
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# hledger-number - try to extract just one single machine-readable number from hledger:
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# the grand total of `hledger balance` run with any provided arguments.
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# Requires hledger 1.24 or newer (the December 2021 release, see https://hledger.org/download.html )
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# https://gist.github.com/simonmichael/feee7fc1567c5f10355f952b87bd3090
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VALUATION_COMMODITY="$"
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hledger bal -0 -N -X "$VALUATION_COMMODITY" --infer-market-prices -c "$VALUATION_COMMODITY 1000" --layout=bare "$@" | awk '{print $1}'
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# Tired of complex financial reports ? This is a silly but fun and
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# occasionally useful script showing how to get "one number" semi-robustly
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# without writing a haskell script. With this installed in PATH, then eg:
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#
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# $ hledger number lodging
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# 200
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#
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# Explanation:
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# -0 (--depth 0) hides all but top-level accounts
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# -N (--no-total) hides the totals line
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# -X COMM (--value=end,COMM) converts to a single commodity if possible (needs at least one suitable P market price declaration)
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# --infer-market-prices guesses P price from conversion transactions if necessary
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# -c (--commodity-style) sets a predictable number format free of thousands separators
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# --layout=bare moves the commodity symbol away from the number
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# awk discards all but the number
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#
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# A note: If you're new to hledger/PTA and thinking it shouldn't be this hard..
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# well of course normally when a hledger user wants to see one number, they run
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# a much simpler command like `hledger bal lodging` or `hledger reg lodging`.
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# This script is exploring how to anticipate and neutralise all variations
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# caused by account structure, number formatting, mulltiple commodities, etc.
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# so as to *reliably* produce *one machine readable number* from highly diverse
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# data. As we figure out good approaches we'll build them in so that eg
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# producing data for charting is as easy as it can be, while still being
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# general.
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