feat(config): fish configs

config/fish/functions/__bash2env.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/env bash
+# Copyright (c) 2022 Huang-Huang Bao
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# shellcheck disable=SC2076
+set -e
+
+disallowd_vars_arr=(
+    _
+    fish_kill_signal
+    fish_killring
+    fish_pid
+    history
+    hostname
+    PWD
+    pipestatus
+    SHLVL
+    status
+    status_generation
+    version
+)
+disallowd_vars=" ${disallowd_vars_arr[*]} "
+
+fish_escape() {
+    value="${1//\\/\\\\}"
+    value="${value//\'/\\\'}"
+    echo "'${value}'"
+}
+
+flag_impure="$__FISH_BASH2ENV_IMPURE"
+unset __FISH_BASH2ENV_IMPURE
+
+if [[ -z "$flag_impure" ]]; then
+    old_env=" $(env -0 | tr '\0' ' ') "
+fi
+
+eval_status=
+eval "$*" 1>&2 || eval_status=$?
+
+env -0 | while IFS= read -rs -d $'\0' line; do
+    if [[ -z "$flag_impure" && "${old_env}" =~ " ${line} " ]]; then
+        continue
+    fi
+
+    name="${line%%=*}"
+    if [[ "${disallowd_vars}" =~ " ${name} " ]]; then
+        continue
+    fi
+
+    value="$(fish_escape "${line#*=}")"
+    echo "set -gx ${name} ${value}"
+done
+
+exit $eval_status