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The nix-index database offered in the derivation may be more out of date than what is present on the system. In fact, prefer any local nix-index database to the prebuilt database included with comma
52 lines
1.1 KiB
Bash
Executable File
52 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# usage example:
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# $ , yarn --help
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# This finds a derivation providing a bin/yarn, and runs it with `nix run`.
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# If there are multiple candidates, the user chooses one using `fzy`.
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set -euo pipefail
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if [[ $# -lt 1 ]]; then
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>&2 echo "usage: , <program> [arguments]"
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exit 1
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fi
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if [[ "$1" == "--install" ]] || [[ "$1" == "-i" ]]; then
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install=1
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shift
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else
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install=""
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fi
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# if a nix-index exists locally; use that as it's likely much more recent
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# than the prebuilt one.
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database=$PREBUILT_NIX_INDEX_DB
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if [ -f "${HOME}/.cache/nix-index/files" ]; then
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database="${HOME}/.cache/nix-index"
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fi
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argv0=$1; shift
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case "${argv0}" in
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@OVERLAY_PACKAGES@)
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attr="${argv0}"
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;;
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*)
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attr="$(nix-locate --db "${database}" --top-level --minimal --at-root --whole-name "/bin/${argv0}")"
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if [[ "$(echo "${attr}" | wc -l)" -ne 1 ]]; then
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attr="$(echo "${attr}" | fzy)"
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fi
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;;
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esac
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if [[ -z $attr ]]; then
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>&2 echo "no match"
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exit 1
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fi
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if [[ -n $install ]]; then
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nix-env -iA "nixpkgs.${attr%%.*}"
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else
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nix run "nixpkgs.${attr}" -c "${argv0}" "$@"
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fi
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