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https://github.com/nix-community/comma.git
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55 lines
1.2 KiB
Bash
Executable File
55 lines
1.2 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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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 "${NIX_INDEX_DB}" --top-level --minimal --at-root --whole-name "/bin/${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_version_greater_or_equal() {
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local nix_version
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nix_version=$(nix --version | cut -f3 -d ' ')
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printf '%s\n%s' "$1" "$nix_version" | sort -C -V
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}
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if nix_version_greater_or_equal "2.4"; then
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nix --extra-experimental-features 'nix-command flakes' shell "nixpkgs#${attr}" -c "${argv0}" "$@"
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else
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nix run "nixpkgs.${attr}" -c "${argv0}" "$@"
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fi
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fi
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