Initial Commit

Author: blaggacao

README.md

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+## Paisano Direnv Support
+
+### Usage
+
+```console
+direnv fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib
+```
+
+##### `.envrc` without watcher
+
+```bash
+#! /bin/sh
+
+source $(fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib <hash>)
+
+use env //repo/shells/default
+```
+
+##### `.envrc` with simple watcher
+
+```bash
+#! /bin/sh
+
+source $(fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib <hash>)
+
+use envreload //repo/shells/default
+```
+
+##### `.envrc` with multiple watcher
+
+```bash
+#! /bin/sh
+
+source $(fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib <hash>)
+
+use envreload //repo/shells/default \
+  //repo/config/default \
+  //repo/packages
+```

lib

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+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2022 The Standard Authors
+# SPDX-License-Identifier: Unlicense
+
+# shellcheck disable=SC2016
+: '
+USAGE:
+
+Example (.envrc):
+  source $(fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib <hash>)
+
+Find hash:
+   direnv fetchurl https://raw.githubusercontent.com/paisano-nix/direnv/main/lib
+'
+
+# signature direnv & nixago output styling
+export DIRENV_LOG_FORMAT=$'\E[mdirenv: \E[38;5;8m%s\E[m'
+
+{ # PRJ Base Directory Specification: https://github.com/numtide/prj-spec
+	# shellcheck source=/dev/null
+	source "$(
+		fetchurl \
+			"https://raw.githubusercontent.com/numtide/prj-spec/cdceb6106317b3fdaef9b63c54bba64e91076749/contrib/direnv" \
+			"sha256-df002uJaXkkBCKsXx5iUddh50h/+4UCV1M044KpCG58="
+	)"
+
+	# numtide/devshell compat
+	PRJ_DATA_DIR="${PRJ_DATA_HOME}"
+	export PRJ_DATA_DIR
+}
+
+{ # Paisano Block
+
+	registry="git+file://$PRJ_ROOT#__std"
+	nix=("nix")
+	nix_eval_args=(
+		"--no-update-lock-file"
+		"--no-write-lock-file"
+		"--no-warn-dirty"
+		"--accept-flake-config"
+	)
+	nix_eval=("${nix[@]}" "eval" "${nix_eval_args[@]}")
+	nix_build_args=(
+		"--no-link"
+		"--keep-outputs"
+		"--build-poll-interval" "0"
+		"--builders-use-substitutes"
+	)
+	nix_build=("${nix[@]}" "build" "${nix_eval_args[@]}" "${nix_build_args[@]}")
+
+	system="$("${nix_eval[@]}" 2>/dev/null --raw --impure --expr builtins.currentSystem)"
+	cellsFrom="$("${nix_eval[@]}" 2>/dev/null --raw "$registry.cellsFrom")"
+
+	# Usage: use env <target>
+	#
+	# Loads the environment determined by the given target
+	#
+	#   use env //local/env/default
+	use_env() {
+		local input="$1"
+		read -r cell block target <<<"${input//\// }"
+
+		action="enter"
+
+		local profile_path="${PRJ_STATE_HOME}/$cell/$block/$target"
+		mkdir -p "${PRJ_STATE_HOME}/$cell/$block/$target"
+
+		cmd=(
+			"${nix_build[@]}"
+			"--print-out-paths"
+			"--profile"
+			"$profile_path/enter-action"
+			"$registry.actions.$system.$cell.$block.$target.$action"
+		)
+
+		if ! enter="$("${cmd[@]}")"; then
+    			log_status "The follwing command just failed:"
+    			log_status "${cmd[@]}"
+    			read -rp "Rerun with --show-trace (y/N): " diagnose
+			[[ "$diagnose" == "y" ]] && "${cmd[@]}" --show-trace
+			exit 1
+		fi
+
+		export STD_DIRENV=1
+		eval "$(<"$enter")"
+		# this is not true
+		unset IN_NIX_SHELL STD_DIRENV
+	}
+
+	_set_watchers() {
+		local input="$1"
+		read -r cell block target <<<"${input//\// }"
+		local BLOCK_PATH="$cellsFrom/$cell/$block"
+		local watchableFile=
+		local watchableDir=
+
+		if [[ -f "$BLOCK_PATH/$target.nix" ]]; then
+			watchableFile="$BLOCK_PATH/$target.nix"
+		elif [[ -f "$BLOCK_PATH/default.nix" ]]; then
+			watchableFile="$BLOCK_PATH/default.nix"
+		elif [[ -f "$BLOCK_PATH.nix" ]]; then
+			watchableFile="$BLOCK_PATH.nix"
+		fi
+
+		if [[ -d "$BLOCK_PATH/$target" ]]; then
+			watchableDir="$BLOCK_PATH/$target"
+		fi
+
+		if [[ -n $watchableFile ]]; then
+			log_status "Watching: ${watchableFile}"
+			watch_file "$watchableFile"
+    		fi
+		if [[ -n $watchableDir ]]; then
+			log_status "Watching: ${watchableDir} (recursively)"
+			watch_dir "$watchableDir"
+    		fi
+
+	}
+
+	use_envreload() {
+		for target in "${@}"; do
+			_set_watchers "$target"
+		done
+		use_env "$1"
+	}
+}