blind mgmt setup

private_bin/private_argparse.bash

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+declare -gA ARGP
+declare -gA SHORT
+
+__reset_argparse() {
+  declare -gA ARGP
+  declare -gA SHORT
+}
+
+die() { echo "Error: $*"; exit 1; }
+
+def_arg() {
+  test "$3" = bool -o "$3" = value || die "def_arg: type (\$3) must be 'bool' or 'value', received '$3'"
+  ARGP["$1,type"]="$3"
+
+  if [ "$3" = bool ]; then
+    test -z "$4" || die "def_arg: bool args cannot specify required/default"
+    declare -g "$1=0"
+  else
+    test "$4" = required -o "$4" = default || die "def_arg: \$4 must be 'required' or 'default', received '$4'"
+    if [ "$4" = required ]; then
+      ARGP["$1,required"]=1
+    else
+      value="$5"
+      declare -g "$1=$value"
+    fi
+  fi
+
+  if [ -n "$2" ]; then
+    SHORT["$2"]="$1"
+  fi
+}
+
+parse_args() {
+  positional=()
+  while (( $# > 0 )); do
+    next="$1"; shift
+    if [[ "$next" == --* ]]; then
+      arg=${next#--}
+      test -n "${ARGP["$arg,type"]}" || die "unknown arg --$arg"
+      if [ "${ARGP["$arg,type"]}" = bool ]; then
+        value=1
+      elif [ $# -eq 0 ]; then
+        die "Missing value for --$arg"
+      else
+        value="$1"; shift
+      fi
+      declare -g "$arg=$value"
+    elif [[ "$next" == -* ]]; then
+      for ((i = 1 ; i < ${#next} ; i++ )); do
+        short=${next:$i:1}
+        arg=${SHORT["$short"]}
+        test -n "$arg" || die "unknown short arg -$short"
+        if [ "${ARGP["$arg,type"]}" = bool ]; then
+          declare -g "$arg=1"
+        else
+          value=${next:$(( i+1 ))}
+          if [ -z "$value" ]; then
+            value="$1"; shift
+          fi
+          test -n "$value" || die "missing value for -$short"
+          declare -g "$arg=$value"
+          break
+        fi
+      done
+    else
+      positional+=("$next")
+    fi
+  done
+
+  # check for missing required
+  for arg in "${!ARGP[@]}"; do
+    arg="${arg%%,*}"
+    [ "${ARGP["$arg,required"]}" != 1 ] || [ -n "${!arg}" ] || die "missing argument --$arg"
+  done
+}

private_bin/private_mgmt

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+set -e
+
+source argparse.bash
+functions=; def_arg functions f value default "${XDG_CONFIG_HOME:-"$HOME/.config"}/mgmt/functions"
+modules=; def_arg modules m value default "${XDG_CONFIG_HOME:-"$HOME/.config"}/mgmt/modules"
+positional=(); parse_args "$@"
+
+while IFS= read -rd '' fnfile; do
+  source "$fnfile"
+done < <(find "$functions" -type f -print0)
+
+PREFIX=""
+grey() { printf "\33[37;2m%s\33[0;m" "$*"; }
+red() { printf "\33[31;1m%s\33[0;m" "$*"; }
+diag() {
+  >&2 printf "\33[2K\r%s" "$(grey "$PREFIX")"
+  >&2 echo "$@"
+}
+
+join_by() { local IFS="$1"; shift; echo "$*"; }
+filter_by_args() { grep -E "$(join_by '|' "${positional[@]}")"; }
+
+#####
+# Gather dependencies of (filtered) modules
+#####
+declare -a found_modules
+mapfile -t filtered_mods < <(find "$modules" -type f | filter_by_args)
+set -- "${filtered_mods[@]}"
+while [ $# -gt 0 ]; do
+  unset deps; declare -a deps
+  for mod; do
+    if echo "${found_modules[@]}" | grep -q "$mod"; then
+      continue
+    fi
+    found_modules+=( "$mod" )
+    unset DEPENDS
+    source "$mod"
+    for dep in "${DEPENDS[@]}"; do
+      if echo "${found_modules[@]}" | grep -qv "$dep"; then
+        if echo "${deps[@]}" | grep -qv "$dep"; then
+          deps+=( "$dep" )
+        fi
+      fi
+    done
+  done
+  set -- "${deps[@]}"
+done
+
+#####
+# Resolve dependency ordering
+#####
+declare -a ordered_modules
+set -- "${found_modules[@]}"
+while [ $# -gt 0 ]; do
+  unset remaining; declare -a remaining
+  for mod; do
+    unset DEPENDS
+    source "$mod"
+    if [[ -n "$(comm -23 <(printf -- '%s\n' "${DEPENDS[@]}" | sort) <(printf -- '%s\n' "${ordered_modules[@]}" | sort))" ]]; then
+      remaining+=( "$mod" )
+    else
+      ordered_modules+=( "$mod" )
+    fi
+  done
+  if [ $# -eq ${#remaining[@]} ]; then
+    diag "$(red "Error: dependency loop involving ${remaining[*]}")"
+    exit 1
+  fi
+  set -- "${remaining[@]}"
+done
+
+#####
+# Apply modules
+#####
+sudo -v
+set -- "${ordered_modules[@]}"
+for mod; do
+  diag -e "\nApplying $mod"
+  PREFIX="[$mod] "
+  unset check_setup setup check_apply apply
+  source "$modules/$mod"
+  test "$(declare -F check_setup)" || { check_setup() { false ; } }
+  test "$(declare -F check_apply)" || { check_apply() { false ; } }
+  test "$(declare -F setup)"       || { setup() { true; } }
+  test "$(declare -F apply)"       || { apply() { true; } }
+  check_setup || setup
+  check_apply || apply
+  PREFIX=""
+done