mirror of
https://github.com/dwmkerr/hacker-laws.git
synced 2025-12-17 04:35:12 +01:00
45 lines
1.3 KiB
Bash
Executable File
45 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Fail on errors.
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set -e -o pipefail
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# Check if parameters are provided
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input="$1"
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output="$2"
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if [ -z "${input}" ] || [ -z "${output}" ]; then
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echo "usage: $(basename "$0") <input> <output>" >&2
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echo " input: source markdown file (usually README.md)" >&2
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echo " output: output markdown file (usually hacker-laws.md)" >&2
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exit 1
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fi
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# Grab env vars used to configure output, fail if required are missing.
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export date="${DATE:-$(date +%F)}"
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export version="${VERSION?error: VERSION must be set}"
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# Update the input file to an intermedate.
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intermediate="${input}.temp"
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cat <<EOF > "${intermediate}"
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---
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title: "Hacker Laws"
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author: "Dave Kerr, github.com/dwmkerr/hacker-laws"
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subtitle: "Laws, Theories, Principles, and Patterns that developers will find useful. ${VERSION}, ${DATE}."
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version: ${VERSION}
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---
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EOF
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cat "${input}" >> "${intermediate}"
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DATE="${date}" VERSION="${version}" envsubst < "${intermediate}" > "${output}"
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# Use a single `sed` command to clean up unwanted lines and emojis in one pass.
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sed -e '/💻📖.*/d' \
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-e 's/❗/Warning/g' \
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-e '/^\[Translations.*/d' \
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-e '/\*.*/d' \
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-e '/ \*.*/d' \
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-e '/## Translations/,$d' "${output}" > "${intermediate}"
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mv "${intermediate}" "${output}"
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echo "${output} prepared successfully."
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