88 lines
2.1 KiB
Nix
88 lines
2.1 KiB
Nix
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{ ... }: {
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text = ''
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# Save file checksums.
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# For file with a name `file` it will create a new file called `.file.sha1` with hash in it.
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# All files by default.
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# Usage: checksum_create [FILES]
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function checksum_create() {
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local IFS=$'\n'
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local targets=(''${@})
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[[ "''${targets}" = "" ]] && targets=($(_ls_file))
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process() {
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local hashfile=".''${target#./}.sha1"
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# Skip if hash exists.
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[[ -f "''${hashfile}" ]] && return 0
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# Calculate hash.
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pv ''${target} | sha1sum > ''${hashfile}
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}
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_iterate_targets process ''${targets[@]}
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}
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# Check stored values against actual files.
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# All files by default.
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# Usage: checksum_check [FILES]
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function checksum_check() {
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local IFS=$'\n'
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local targets=(''${@})
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[[ "''${targets}" = "" ]] && targets=($(_ls_file))
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process() {
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local hashfile=".''${target#./}.sha1"
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# Skip if hash doesn't exist.
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[[ -f "''${hashfile}" ]] || { _iterate_skip "No hash found."; return 0; }
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# Calculate hash.
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local stored=$(cat "''${hashfile}" | cut -d\ -f1)
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local actual=$(pv "''${target}" | sha1sum | cut -d\ -f1)
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if [[ "''${stored}" != "''${actual}" ]]; then
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_error "Failed."
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return 1
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fi
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}
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_iterate_targets process ''${targets[@]}
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}
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# Calculate hashes for all files recursively and store in a file called `checksum.sha1`.
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function checksum() {
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find -type f | parallel -j $(_core_count) -- sha1sum {} >> checksum.sha1
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}
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# Create checksum for a file.
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# Usage: _checksum_create <FILE>
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function _checksum_create() {
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local path="''${1%/*}"
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local name="''${1##*/}"
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sha1sum "''${path}/''${name}" > "''${path}/.''${name}.sha1"
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}
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# Check checksum for a file.
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# Usage: _checksum_check <FILE>
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function _checksum_check() {
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local file="''${1##*\ \ }"
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local stored="''${1%%\ \ *}"
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# Skip if no file.
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[[ -f "''${file}" ]] || return 0
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# Check file hash.
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local actual=$(sha1sum "''${file}")
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actual="''${actual%%\ \ *}"
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# Compare values.
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if [[ "''${stored}" != "''${actual}" ]]; then
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_error "''${file}: Failed."
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return 1
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fi
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return 0
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}
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'';
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}
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