visidata: add installer and optional deps list

config/visidata/.gitignore

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+__pycache__/
+plugins/__pycache__/
+*.pyc

config/visidata/install.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+mode="link"   # link|copy
+do_deps=0
+
+usage() {
+  cat <<'USAGE'
+Usage: ./install.sh [--link|--copy] [--deps]
+
+Installs this repo's VisiData config and plugins into standard per-user locations:
+- config.py in the user config dir (VisiData 3.3+ default)
+- ~/.visidatarc (legacy fallback)
+- plugins into $VD_DIR/plugins (default ~/.visidata/plugins)
+
+Options:
+  --link    Symlink files into place (default)
+  --copy    Copy files into place
+  --deps    Install requirements.txt into $VD_DIR/plugins-deps using pip --target
+  -h,--help Show this help
+USAGE
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --link) mode="link"; shift ;;
+    --copy) mode="copy"; shift ;;
+    --deps) do_deps=1; shift ;;
+    -h|--help) usage; exit 0 ;;
+    *) echo "Unknown arg: $1" >&2; usage; exit 2 ;;
+  esac
+done
+
+script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
+src_rc="${script_dir}/visidatarc"
+src_plugins_dir="${script_dir}/plugins"
+src_reqs="${script_dir}/requirements.txt"
+
+if [[ ! -f "${src_rc}" ]]; then
+  echo "Missing ${src_rc}" >&2
+  exit 1
+fi
+
+timestamp() { date +"%Y%m%d-%H%M%S"; }
+
+backup_if_needed() {
+  local dst="$1"
+  if [[ -L "$dst" ]]; then
+    # If it's already a symlink to our source (absolute), keep it.
+    local cur
+    cur="$(readlink "$dst" || true)"
+    if [[ "$cur" == "$2" ]]; then
+      return 0
+    fi
+  fi
+  if [[ -e "$dst" || -L "$dst" ]]; then
+    mv "$dst" "${dst}.bak.$(timestamp)"
+  fi
+}
+
+install_one() {
+  local src="$1"
+  local dst="$2"
+  mkdir -p "$(dirname "$dst")"
+  backup_if_needed "$dst" "$src"
+  if [[ "$mode" == "copy" ]]; then
+    cp -f "$src" "$dst"
+  else
+    ln -s "$src" "$dst"
+  fi
+}
+
+os="$(uname -s)"
+if [[ "$os" == "Darwin" ]]; then
+  config_dir="${HOME}/Library/Preferences/visidata"
+else
+  config_dir="${XDG_CONFIG_HOME:-${HOME}/.config}/visidata"
+fi
+dst_config_py="${config_dir}/config.py"
+dst_visidatarc="${HOME}/.visidatarc"
+
+vd_dir="${VD_DIR:-${HOME}/.visidata}"
+dst_plugins_dir="${vd_dir}/plugins"
+dst_deps_dir="${vd_dir}/plugins-deps"
+
+# Config file(s)
+install_one "$src_rc" "$dst_config_py"
+install_one "$src_rc" "$dst_visidatarc"
+
+# Plugins
+mkdir -p "$dst_plugins_dir"
+if [[ -d "$src_plugins_dir" ]]; then
+  for src_plugin in "${src_plugins_dir}"/*.py; do
+    [[ -e "$src_plugin" ]] || continue
+    install_one "$src_plugin" "${dst_plugins_dir}/$(basename "$src_plugin")"
+  done
+fi
+
+if [[ "$do_deps" -eq 1 ]]; then
+  if [[ ! -f "$src_reqs" ]]; then
+    echo "Missing ${src_reqs}" >&2
+    exit 1
+  fi
+  mkdir -p "$dst_deps_dir"
+
+  # Prefer the python used by the `vd` entrypoint (if available).
+  pip_py=""
+  if command -v vd >/dev/null 2>&1; then
+    vd_bin="$(command -v vd)"
+    pip_py="$(sed -n '1{s/^#!//p;}' "$vd_bin" || true)"
+  fi
+  if [[ -z "$pip_py" ]]; then
+    pip_py="$(command -v python3 || true)"
+  fi
+  if [[ -z "$pip_py" ]]; then
+    echo "No python found to run pip." >&2
+    exit 1
+  fi
+
+  "$pip_py" -m pip install --upgrade --target "$dst_deps_dir" -r "$src_reqs"
+fi
+
+echo "Installed:"
+echo "  ${dst_config_py}"
+echo "  ${dst_visidatarc}"
+echo "  ${dst_plugins_dir}/"
+if [[ "$do_deps" -eq 1 ]]; then
+  echo "  ${dst_deps_dir}/"
+fi

config/visidata/requirements.txt

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+# Optional deps used by /Users/tabledevil/gists/config/visidata/visidatarc.
+# Install into VisiData's per-user deps dir (recommended):
+#   ./install.sh --deps
+#
+# Or manually:
+#   python -m pip install --target ~/.visidata/plugins-deps -r requirements.txt
+#
+# Core HTTP / scraping
+requests
+beautifulsoup4
+lxml
+#
+# Data parsing
+PyYAML
+#
+# DNS lookups
+dnspython
+#
+# Enrichment helpers
+mac-vendor-lookup
+virus_total_apis