#!/bin/bash
#
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
#
# test-build - verify an already-published SBo package still builds on a target
# Slackware version inside a throwaway docker container. Resolves + builds its
# SBo deps from the local tree, caches built deps per image digest, reports
# per-package status and lints the target.
#
# Dependency-resolution, cache, and summary logic are adapted from sbo-batch-test
# (github: danixland). The overlay chroot is replaced by a docker container: the
# container IS the disposable environment, so no overlayfs.
#
# No em dashes in prose by author convention.

# =============================================================================
# CONFIG (do not edit here; real values live in the external config file)
# =============================================================================
SBO_TREE_CURRENT=""
SBO_TREE_STABLE=""
IMAGE_CURRENT=""
IMAGE_STABLE=""
LOG_ROOT="/var/log/sbo-test-build"
PKG_CACHE=""

TB_CONFIG="${TB_CONFIG:-$HOME/.config/sbo-testbuild/config}"
if [[ -f "$TB_CONFIG" ]]; then
  # shellcheck disable=SC1090
  source "$TB_CONFIG"
fi

TB_OVERRIDES="${TB_OVERRIDES:-$HOME/.config/sbo-testbuild/overrides}"

# =============================================================================
set -uo pipefail
# Not -e: a package build failing is a handled outcome, not a script crash.

# ---- flags / globals --------------------------------------------------------
USE_COLOR=1        # --no-color or non-TTY disables
DRY_RUN=0          # --dry-run: resolve + print order, do not build
ASSUME_YES=0       # --yes: skip the confirm prompt (still prints the order)
USE_CACHE=1        # --no-cache disables the dep cache for one run
KEEP_TARGET=0      # --keep: copy the built target package out to KEEP_DIR
VERSION_ID="current"   # "current" | "15.0"; set by --stable
TARGET_ARG=""

ACTIVE_TREE=""     # selected SBo tree (by version)
ACTIVE_IMAGE=""    # selected image tag (by version)
RUN_DIR=""         # timestamped log dir for this run
DEPS_DIR=""        # per-run host dir of built dep .txz, mounted into the container
BUILD_OUT=""       # per-run host dir where built packages are copied out

# Status tracking. Keyed by "category/prog". Parallel assoc arrays.
declare -A ST_STATUS=()
declare -A ST_REASON=()
declare -A ST_TIME=()
declare -A ST_README=()

usage() {
  cat <<'EOF'
test-build - verify an SBo package builds on a target Slackware in docker

USAGE:
  test-build [OPTIONS] <program-name>

OPTIONS:
  -h, --help    This text.
  --stable      Target Slackware 15.0 (image + tree). Default is -current.
  --dry-run     Resolve, apply overrides, print the build order, do not build.
  --yes         Skip the confirm prompt (the order is still printed first).
  --no-cache    Rebuild all deps this run, ignore/refresh the cache.
  --keep        Copy the built target package out to a kept/ dir (path is
                printed), so it can be installed on the host. The build is
                otherwise throwaway.
  --no-color    Disable ANSI color (auto-disabled when stdout is not a TTY).
EOF
}

parse_args() {
  while [[ $# -gt 0 ]]; do
    case "$1" in
      -h|--help) usage; exit 0 ;;
      --stable|15.0) VERSION_ID="15.0"; shift ;;
      --dry-run) DRY_RUN=1; shift ;;
      --yes) ASSUME_YES=1; shift ;;
      --no-cache) USE_CACHE=0; shift ;;
      --keep) KEEP_TARGET=1; shift ;;
      --no-color) USE_COLOR=0; shift ;;
      -*) echo "Unknown option: $1" >&2; usage >&2; exit 2 ;;
      *)
        if [[ -n "$TARGET_ARG" ]]; then
          echo "Only one target accepted (got '$TARGET_ARG' and '$1')." >&2
          exit 2
        fi
        TARGET_ARG="$1"; shift ;;
    esac
  done
  if [[ -z "$TARGET_ARG" ]]; then
    echo "No target given." >&2; usage >&2; exit 2
  fi
}

init_color() {
  if [[ $USE_COLOR -eq 1 && -t 1 ]]; then
    C_RED=$'\e[31m'; C_GRN=$'\e[32m'; C_YEL=$'\e[33m'; C_RST=$'\e[0m'
  else
    C_RED=""; C_GRN=""; C_YEL=""; C_RST=""
  fi
}

# Map VERSION_ID to the active tree + image. No I/O, unit-testable.
select_version_paths() {
  if [[ "$VERSION_ID" == "15.0" ]]; then
    ACTIVE_TREE="$SBO_TREE_STABLE"; ACTIVE_IMAGE="$IMAGE_STABLE"
  else
    ACTIVE_TREE="$SBO_TREE_CURRENT"; ACTIVE_IMAGE="$IMAGE_CURRENT"
  fi
}

# require_config: the external config must exist and set the version's paths.
require_config() {
  if [[ ! -f "$TB_CONFIG" ]]; then
    cat >&2 <<EOF
No config file: $TB_CONFIG
Copy the example and edit it:

  mkdir -p "\$(dirname "$TB_CONFIG")"
  cp test-build-config.example "$TB_CONFIG"
  \${EDITOR:-vi} "$TB_CONFIG"
EOF
    exit 1
  fi
  select_version_paths
  if [[ -z "$ACTIVE_TREE" || -z "$ACTIVE_IMAGE" ]]; then
    echo "Config $TB_CONFIG is missing the tree/image for version '$VERSION_ID'." >&2
    exit 1
  fi
  if [[ ! -d "$ACTIVE_TREE" ]]; then
    echo "SBo tree for '$VERSION_ID' does not exist: $ACTIVE_TREE" >&2
    exit 1
  fi
}

# =============================================================================
# SBo tree lookup
# =============================================================================
# In this tool there is one active tree per run, but the resolver reads an array
# named SBO_TREE_ROOTS so the ported logic and its self-check match sbo-batch-test.
# main() sets SBO_TREE_ROOTS=("$ACTIVE_TREE") after require_config.
declare -a SBO_TREE_ROOTS=()

find_slackbuild_dir() {
  local prog="$1" root d
  for root in "${SBO_TREE_ROOTS[@]}"; do
    [[ -d "$root" ]] || continue
    for d in "$root"/*/"$prog"; do
      if [[ -d "$d" && -f "$d/$prog.info" ]]; then
        echo "$d"; return 0
      fi
    done
  done
  return 1
}

category_of() { basename "$(dirname "$1")"; }
pkg_key() { echo "$(category_of "$1")/$(basename "$1")"; }

# Resolve the TARGET to test from CWD or a path (repo-agnostic). The target is
# the SlackBuild you are editing, wherever it lives; its deps come from the
# configured SBo tree (see find_slackbuild_dir), NOT the other way around.
#   - a path (absolute, or containing '/', or '.'/'./x'): use that dir directly
#   - a bare name: ./<name>/ under CWD, else CWD itself if it IS <name>/
# Prints the resolved absolute dir on success; returns 1 (with a message) if the
# dir has no matching <name>.info.
resolve_target_dir() {
  local arg="$1" dir prog
  if [[ "$arg" == /* || "$arg" == .* || "$arg" == */* ]]; then
    dir="${arg%/}"; prog="$(basename "$dir")"
  elif [[ -f "./$arg/$arg.info" ]]; then
    dir="./$arg"; prog="$arg"
  elif [[ "$(basename "$PWD")" == "$arg" && -f "./$arg.info" ]]; then
    dir="."; prog="$arg"
  else
    echo "Target '$arg' not found: no ./$arg/$arg.info, and CWD is not $arg/." >&2
    return 1
  fi
  if [[ ! -f "$dir/$prog.info" ]]; then
    echo "Target dir '$dir' has no $prog.info (expected a SlackBuild package dir)." >&2
    return 1
  fi
  ( cd "$dir" && pwd )   # emit absolute path
}

read_requires() {
  local info="$1"
  # shellcheck disable=SC1090
  ( set +u; source "$info"; echo "${REQUIRES:-}" )
}

version_of() {
  local dir="$1"
  local info="$dir/$(basename "$dir").info"
  [[ -f "$info" ]] || return
  local v; v="$(grep -m1 '^VERSION=' "$info" | cut -d'"' -f2)"
  echo "$v"
}

# =============================================================================
# DEPENDENCY RESOLUTION (topo sort + cycle detection, LOCAL tree only)
# =============================================================================
declare -a RESOLVED_ORDER=()
declare -A UNMET=()
declare -a CYCLES=()
declare -A HAS_README=()
declare -A _vstate=()
declare -A FETCH_DEPS=()   # prog -> 1: resolve via sbopkg in-container

# Is a prog already present in the container base? Kept as a callback so the
# pure topo logic stays testable.
#
# Populated lazily from the active image's package db on first call: each entry
# in /var/log/packages is named <name>-<ver>-<arch>-<build>, so strip the last
# three dash-fields to get the bare package name and match the SBo token
# against that. TB_BASE_PKGS can be pre-seeded by tests to bypass docker.
declare -A TB_BASE_PKGS=()
TB_BASE_LOADED="${TB_BASE_LOADED:-0}"

load_base_pkgs() {
  [[ "$TB_BASE_LOADED" == "1" ]] && return 0
  TB_BASE_LOADED=1
  [[ -n "$ACTIVE_IMAGE" ]] || return 0
  local entry name
  while IFS= read -r entry; do
    [[ -n "$entry" ]] || continue
    # strip trailing -<ver>-<arch>-<build>
    name="${entry%-*-*-*}"
    TB_BASE_PKGS["$name"]=1
  done < <(docker run --rm "$ACTIVE_IMAGE" \
             /bin/sh -c 'ls /var/log/packages' 2>/dev/null)
}

installed_in_base() {
  load_base_pkgs
  [[ -n "${TB_BASE_PKGS[$1]:-}" ]]
}

_resolve_visit() {
  local dir="$1" parent="$2"
  local key; key="$(basename "$dir")"

  if [[ "${_vstate[$dir]:-}" == "1" ]]; then return 0; fi
  if [[ "${_vstate[$dir]:-}" == "0" ]]; then
    CYCLES+=("cycle involving $key (pulled in via $parent)")
    return 1
  fi
  _vstate["$dir"]=0

  local info="$dir/$(basename "$dir").info"
  local req tok depdir rc=0
  req="$(read_requires "$info")"
  for tok in $req; do
    if [[ "$tok" == "%README%" ]]; then
      HAS_README["$dir"]=1
      continue
    fi
    tok="$(apply_rename "$tok")"
    # drop: satisfied by the -current base (e.g. a 15.0-only dep like rust-opt
    # whose payload ships in current's full-install image). Skip it entirely:
    # no recurse, no UNMET, no order entry. Inert on 15.0 (overrides are).
    if [[ "${OV_DROP[$tok]:-}" == "1" ]]; then
      continue
    fi
    if [[ "${OV_FETCH[$tok]:-}" == "1" ]]; then
      FETCH_DEPS["$tok"]=1
      continue
    fi
    if depdir="$(find_slackbuild_dir "$tok")"; then
      _resolve_visit "$depdir" "$key" || rc=1
    elif installed_in_base "$tok"; then
      :
    else
      UNMET["$tok"]="needed by $key"
      rc=1
    fi
  done

  _vstate["$dir"]=1
  RESOLVED_ORDER+=("$dir")
  return $rc
}

resolve_target() {
  local dir="$1"
  RESOLVED_ORDER=()
  CYCLES=()
  UNMET=()
  FETCH_DEPS=()
  _vstate=()
  _resolve_visit "$dir" "(top)"
}

# =============================================================================
# current-vs-stable overrides. Parsed from $TB_OVERRIDES. Applied only when
# targeting -current (15.0 is the SBo baseline, no deltas).
# =============================================================================
declare -A OV_DROP=()      # prog -> 1
declare -A OV_RENAME=()    # old  -> new
declare -A OV_FETCH=()     # prog -> 1

load_overrides() {
  OV_DROP=(); OV_RENAME=(); OV_FETCH=()
  # 15.0 is the baseline: no overrides.
  [[ "$VERSION_ID" == "15.0" ]] && return
  [[ -f "$TB_OVERRIDES" ]] || return
  local line kind rest
  while IFS= read -r line; do
    line="${line%%#*}"                       # strip comments
    line="${line#"${line%%[![:space:]]*}"}"  # ltrim
    [[ -z "$line" ]] && continue
    kind="${line%%:*}"; rest="${line#*:}"
    kind="${kind//[[:space:]]/}"
    rest="${rest#"${rest%%[![:space:]]*}"}"  # ltrim value
    case "$kind" in
      drop)   OV_DROP["${rest//[[:space:]]/}"]=1 ;;
      fetch)  OV_FETCH["${rest//[[:space:]]/}"]=1 ;;
      rename)
        # rest is "old -> new"
        local old new
        old="${rest%%->*}"; new="${rest##*->}"
        old="${old//[[:space:]]/}"; new="${new//[[:space:]]/}"
        [[ -n "$old" && -n "$new" ]] && OV_RENAME["$old"]="$new" ;;
      *) echo "WARN: unknown override rule: $line" >&2 ;;
    esac
  done < "$TB_OVERRIDES"
}

# Map a dep token through rename rules (identity if no rule).
apply_rename() {
  local tok="$1"
  echo "${OV_RENAME[$tok]:-$tok}"
}

# Remove dropped packages from RESOLVED_ORDER in place.
apply_overrides_to_order() {
  local d prog keep=()
  for d in "${RESOLVED_ORDER[@]}"; do
    prog="$(basename "$d")"
    [[ "${OV_DROP[$prog]:-}" == "1" ]] && continue
    keep+=("$d")
  done
  # Assign without "${keep[@]:-}": under set -u that fallback yields a
  # one-element array holding an empty string when keep is empty (all deps
  # dropped), which the build loop would then iterate over as d="". Guard it.
  if [[ ${#keep[@]} -eq 0 ]]; then
    RESOLVED_ORDER=()
  else
    RESOLVED_ORDER=("${keep[@]}")
  fi
}

# =============================================================================
# Dependency cache. Layout: $CACHE_ROOT/<cat>/<prog>/<prog>-<ver>-...txz where
# CACHE_ROOT = $PKG_CACHE/<image-digest> (set per run by resolve_cache_root).
# Key is prog+version. --no-cache (USE_CACHE=0) or empty PKG_CACHE disables.
# =============================================================================
CACHE_ROOT=""   # set by resolve_cache_root once the image digest is known

# True when the cache is usable this run.
_cache_on() { [[ $USE_CACHE -eq 1 && -n "$PKG_CACHE" && -n "$CACHE_ROOT" ]]; }

_cache_ver_of() {
  local prog="$1" base="$2"
  base="${base#"$prog"-}"
  echo "${base%%-*}"
}

# cache_decision <cat> <prog> <version> -> cached | bump:OLD:NEW | new
cache_decision() {
  local cat="$1" prog="$2" version="$3"
  _cache_on || { echo new; return; }
  local dir="$CACHE_ROOT/$cat/$prog"
  local f newest=""
  for f in "$dir/$prog"-*.t?z; do
    [[ -e "$f" ]] || continue
    [[ -z "$newest" || "$f" -nt "$newest" ]] && newest="$f"
  done
  [[ -z "$newest" ]] && { echo new; return; }
  local have; have="$(_cache_ver_of "$prog" "$(basename "$newest")")"
  if [[ "$have" == "$version" ]]; then echo cached; else echo "bump:$have:$version"; fi
}

cache_path() {
  local cat="$1" prog="$2" version="$3"
  _cache_on || return
  local dir="$CACHE_ROOT/$cat/$prog"
  local f newest=""
  for f in "$dir/$prog"-*.t?z; do
    [[ -e "$f" ]] || continue
    [[ -z "$newest" || "$f" -nt "$newest" ]] && newest="$f"
  done
  [[ -z "$newest" ]] && return
  [[ "$(_cache_ver_of "$prog" "$(basename "$newest")")" == "$version" ]] && echo "$newest"
}

cache_store() {
  local cat="$1" prog="$2" src="$3"
  _cache_on || return
  local dir="$CACHE_ROOT/$cat/$prog"
  mkdir -p "$dir"
  rm -f "$dir"/*.t?z
  cp -a "$src" "$dir/"
}

cache_label() {
  local dir="$1" is_target="$2"
  local cat prog ver dec
  cat="$(category_of "$dir")"; prog="$(basename "$dir")"; ver="$(version_of "$dir")"
  dec="$(cache_decision "$cat" "$prog" "$ver")"
  local label
  case "$dec" in
    cached)   label="cached ($ver)" ;;
    bump:*)   label="rebuild: ${dec#bump:}"; label="${label/:/ -> }" ;;
    *)        label="build (new)" ;;
  esac
  if [[ "$is_target" == "1" ]]; then
    case "$dec" in
      cached) label="build (cached $ver, rebuilt as target)" ;;
    esac
    echo "target, $label"
  else
    echo "$label"
  fi
}

# Compute CACHE_ROOT from the image's digest, namespaced by variant. Falls back
# to the tag if the digest cannot be read (still isolates per image reference).
# The dir is "<variant>-<digest>", so an image rebuild changes the digest and
# self-invalidates the cache (deps built against the old base are never reused).
#
# Prune stale digests of THIS variant on the way in: a base update leaves the
# old <variant>-<olddigest> dir orphaned, so drop it. Scoped to the variant so a
# --current run does not wipe the 15.0 cache (both live caches survive, and
# testing both trees back-to-back still reuses built deps).
resolve_cache_root() {
  [[ -z "$PKG_CACHE" ]] && { CACHE_ROOT=""; return; }
  local digest
  digest="$(docker image inspect --format '{{index .Id}}' "$ACTIVE_IMAGE" 2>/dev/null)"
  [[ -z "$digest" ]] && digest="tag-${ACTIVE_IMAGE//[^a-zA-Z0-9._-]/_}"
  digest="${digest//[^a-zA-Z0-9._-]/_}"
  local name="${VERSION_ID}-${digest}"
  CACHE_ROOT="$PKG_CACHE/$name"
  mkdir -p "$CACHE_ROOT"

  # drop superseded caches for this variant only
  local d
  for d in "$PKG_CACHE/${VERSION_ID}-"*; do
    [[ -d "$d" ]] || continue
    [[ "$(basename "$d")" == "$name" ]] && continue
    rm -rf "$d"
  done
}

# Does SlackBuild dir $1 directly require any prog in the dead list (nameref $2)?
# Direct-requires check only; transitive blocking works because run_target
# iterates in topo order, propagating a failure one hop per package.
depends_on_failed() {
  local dir="$1"; local -n failed="$2"
  local info="$dir/$(basename "$dir").info"
  local req tok f
  req="$(read_requires "$info")"
  for tok in $req; do
    [[ "$tok" == "%README%" ]] && continue
    for f in "${failed[@]:-}"; do
      [[ "$tok" == "$f" ]] && return 0
    done
  done
  return 1
}

# build_one <slackbuild-dir> <is_target 0|1> [container-name]
# Runs the build in a throwaway container. Sets ST_STATUS/ST_REASON/ST_TIME.
# Successful builds copy their package to a host workdir; deps are cached and
# the target is linted. Returns 0 on SUCCESS/CACHED, 1 otherwise.
build_one() {
  local dir="$1" is_target="${2:-0}"
  local prog cat key
  prog="$(basename "$dir")"; cat="$(category_of "$dir")"; key="$cat/$prog"
  local logf="$RUN_DIR/${cat}_${prog}.log"
  local start; start=$(date +%s)
  local version; version="$(version_of "$dir")"

  [[ "${HAS_README[$dir]:-}" == "1" ]] && ST_README["$key"]=1

  # Dep with a version-matching cached package: installpkg it into the shared
  # dep-package dir; no build. The target never takes this path.
  if [[ "$is_target" != "1" ]]; then
    local cached; cached="$(cache_path "$cat" "$prog" "$version")"
    if [[ -n "$cached" ]]; then
      cp -a "$cached" "$DEPS_DIR/"
      {
        echo "===== test-build: $prog (from cache) ====="
        echo "cached package: $(basename "$cached")"
      } >> "$logf"
      ST_TIME["$key"]=$(( $(date +%s) - start ))
      ST_STATUS["$key"]="CACHED"
      return 0
    fi
  fi

  # Build in a container. Mounts:
  #   $dir           -> /sbo/pkg    (ro, the SlackBuild)
  #   $DEPS_DIR      -> /sbo/deps   (rw, already-built dep .txz to installpkg first)
  #   $BUILD_OUT     -> /sbo/out    (rw, where the built package is copied out)
  # The in-container script installs any deps present, then builds the target,
  # writes a status token to /sbo/out/$prog.status, and copies the package out.
  local statf="$BUILD_OUT/$prog.status"
  rm -f "$statf"

  # fetch deps (removed from -current tree): let the container's sbopkg build
  # them first. FETCH_DEPS is the set collected during resolution.
  local fetch_list=""
  local fp
  for fp in "${!FETCH_DEPS[@]}"; do fetch_list+="$fp "; done

  # -i is required: without it docker does not attach stdin, so `bash -s` reads
  # nothing and the heredoc script is silently discarded (exit 0, empty log).
  docker run --rm -i \
    -v "$dir":/sbo/pkg:ro \
    -v "$DEPS_DIR":/sbo/deps \
    -v "$BUILD_OUT":/sbo/out \
    -e PROG="$prog" \
    -e FETCH_LIST="$fetch_list" \
    -e IS_TARGET="$is_target" \
    "$ACTIVE_IMAGE" /bin/bash -s >>"$logf" 2>&1 <<'CONTAINER_EOF'
set -uo pipefail
prog="$PROG"
statf="/sbo/out/$prog.status"

# 0. install already-built dependency packages (order guaranteed by the host).
for d in /sbo/deps/*.t?z; do
  [[ -e "$d" ]] || continue
  installpkg --terse "$d" || { echo "INSTALL-FAILED (dep $d)"; echo INSTALL-FAILED > "$statf"; exit 1; }
done

# 0b. fetch-from-SBo deps via sbopkg (removed from the -current tree).
for f in $FETCH_LIST; do
  echo "sbopkg-building fetch dep: $f"
  sbopkg -B -i "$f" || { echo "BUILD-FAILED (fetch dep $f)"; echo BUILD-FAILED > "$statf"; exit 1; }
done

# copy the SlackBuild out of the read-only mount so it can write there.
cp -a /sbo/pkg /sbo/build
cd /sbo/build || { echo BUILD-FAILED > "$statf"; exit 1; }
. ./"$prog".info

export OUTPUT=/sbo/out
mkdir -p "$OUTPUT"

echo "===== test-build: $prog ====="
echo "PRGNAM=${PRGNAM:-$prog} VERSION=${VERSION:-?} BUILD=${BUILD:-?} TAG=${TAG:-?}"
echo "uname -m: $(uname -m)   OUTPUT=$OUTPUT"
echo "REQUIRES=${REQUIRES:-}"
echo "================================="

if [ "$(uname -m)" = "x86_64" ] && [ -n "${DOWNLOAD_x86_64:-}" ] && [ "${DOWNLOAD_x86_64}" != "UNSUPPORTED" ] && [ "${DOWNLOAD_x86_64}" != "UNTESTED" ]; then
  DL="$DOWNLOAD_x86_64"; MD="$MD5SUM_x86_64"
else
  DL="$DOWNLOAD"; MD="$MD5SUM"
fi

for u in $DL; do
  wget -c --tries=3 "$u" || { echo DOWNLOAD-FAILED > "$statf"; exit 1; }
done

set -- $MD
for u in $DL; do
  f="$(basename "$u")"
  want="$1"; shift
  got="$(md5sum "$f" | cut -d' ' -f1)"
  if [ "$got" != "$want" ]; then
    echo "MD5 mismatch on $f: want $want got $got"
    echo MD5-MISMATCH > "$statf"; exit 1
  fi
done

# Source /etc/profile.d so dep-provided env is live (google-go-lang sets GOROOT
# + PATH to its go here, rust-opt sets cargo, etc.). This heredoc runs in a
# non-login shell, which does NOT read profile.d, so a bare `go build` would
# otherwise pick the system gccgo instead of the installed google-go-lang.
set +u   # profile.d scripts routinely reference unset vars
for pf in /etc/profile.d/*.sh; do
  [ -r "$pf" ] && . "$pf"
done
set -u

chmod +x ./"$prog".SlackBuild
if ! ./"$prog".SlackBuild; then
  echo BUILD-FAILED > "$statf"; exit 1
fi

pkg="$(ls -t "$OUTPUT"/"$prog"-*.t?z 2>/dev/null | head -n1)"
if [ -z "$pkg" ]; then
  echo "No package produced in $OUTPUT"
  echo BUILD-FAILED > "$statf"; exit 1
fi
if ! installpkg --terse "$pkg"; then
  echo INSTALL-FAILED > "$statf"; exit 1
fi
echo "===== installed files: $(basename "$pkg") ====="
pkgname="$(basename "$pkg")"; pkgname="${pkgname%.t?z}"
cat "/var/log/packages/$pkgname" 2>/dev/null || echo "(package db entry not found)"
echo "================================="

# lint the target here in the container: sbopkglint is baked into the image and
# runs as root, so it needs no host sudo. Fail-soft: findings never fail the build.
if [ "${IS_TARGET:-0}" = "1" ] && command -v sbopkglint >/dev/null 2>&1; then
  echo "===== sbopkglint: $(basename "$pkg") ====="
  if sbopkglint "$pkg"; then
    echo "LINT-CLEAN"
  else
    echo "LINT-FINDINGS"
  fi
  echo "================================="
fi
echo SUCCESS > "$statf"
CONTAINER_EOF

  local status="BUILD-FAILED"
  [[ -f "$statf" ]] && status="$(cat "$statf")"
  ST_TIME["$key"]=$(( $(date +%s) - start ))
  ST_STATUS["$key"]="$status"

  if [[ "$status" == "SUCCESS" ]]; then
    # locate the built package copied to the host workdir
    local built newest=""
    for built in "$BUILD_OUT/${prog}"-*.t?z; do
      [[ -e "$built" ]] || continue
      [[ -z "$newest" || "$built" -nt "$newest" ]] && newest="$built"
    done
    if [[ -n "$newest" ]]; then
      if [[ "$is_target" != "1" ]]; then
        cache_store "$cat" "$prog" "$newest"
        # make the dep available to later builds in this run
        cp -a "$newest" "$DEPS_DIR/"
      else
        # lint ran in-container (see IS_TARGET block); surface its verdict from
        # the log so the host summary can show clean/findings.
        if grep -q '^LINT-FINDINGS$' "$logf" 2>/dev/null; then
          echo "  lint: ${C_RED}findings${C_RST} (see $(basename "$logf"))"
        elif grep -q '^LINT-CLEAN$' "$logf" 2>/dev/null; then
          echo "  lint: ${C_GRN}clean${C_RST}"
        fi
        # --keep: copy the built target package to a durable dir (sibling of the
        # logs tree, not inside a throwaway run dir) so it can be installed on
        # the host, e.g. to regenerate post-install artifacts.
        if [[ $KEEP_TARGET -eq 1 ]]; then
          local keepdir; keepdir="$(dirname "$LOG_ROOT")/kept"
          mkdir -p "$keepdir"
          cp -a "$newest" "$keepdir/"
          echo "  kept: $keepdir/$(basename "$newest")"
        fi
      fi
    fi
    return 0
  fi
  ST_REASON["$key"]="see $(basename "$logf")"
  return 1
}

# confirm_order: print the resolved order (overrides marked) and ask to proceed.
# --yes skips the prompt but the order is still printed. --dry-run never reaches
# here. Returns 0 to proceed, 1 to abort.
confirm_order() {
  local target_dir="$1"
  echo "  build order (${VERSION_ID}):"
  local d
  for d in "${RESOLVED_ORDER[@]}"; do
    local it=0; [[ "$d" == "$target_dir" ]] && it=1
    local rdm=""; [[ "${HAS_README[$d]:-}" == 1 ]] && rdm="  [%README%]"
    printf "    %-30s %s%s\n" "$(pkg_key "$d")" "$(cache_label "$d" "$it")" "$rdm"
    echo "$(pkg_key "$d")" >> "$RUN_DIR/build-order.txt"
  done
  # note fetch deps (built via sbopkg in-container, not in the order list)
  local fp
  for fp in "${!FETCH_DEPS[@]}"; do
    printf "    %-30s %s\n" "$fp" "fetch (sbopkg in container)"
  done
  [[ $ASSUME_YES -eq 1 ]] && return 0
  local reply
  read -rp "  Proceed? [Y/n] " reply
  [[ -z "$reply" || "$reply" =~ ^[Yy]$ ]]
}

# run_target <target-slackbuild-dir>
run_target() {
  local target_dir="$1"
  local tkey; tkey="$(pkg_key "$target_dir")"

  echo
  echo "=== Target: $tkey (${VERSION_ID}) ==="
  resolve_target "$target_dir"
  apply_overrides_to_order

  # Hard resolution failures: report and stop, do not build.
  if [[ ${#CYCLES[@]} -gt 0 || ${#UNMET[@]} -gt 0 ]]; then
    local why=""
    if [[ ${#UNMET[@]} -gt 0 ]]; then
      local u
      for u in "${!UNMET[@]}"; do why+="unmet:$u(${UNMET[$u]}) "; done
    fi
    [[ ${#CYCLES[@]} -gt 0 ]] && why+="${CYCLES[*]}"
    ST_STATUS["$tkey"]="UNMET-DEP"
    ST_REASON["$tkey"]="$why"
    echo "  resolution failed: $why"
    echo "  add an override rule ($TB_OVERRIDES) and rerun, or fix the tree." >&2
    return
  fi

  if [[ $DRY_RUN -eq 1 ]]; then
    echo "  build order (dry-run):"
    local d
    for d in "${RESOLVED_ORDER[@]}"; do
      local it=0; [[ "$d" == "$target_dir" ]] && it=1
      local rdm=""; [[ "${HAS_README[$d]:-}" == 1 ]] && rdm="  [%README%]"
      printf "    %-30s %s%s\n" "$(pkg_key "$d")" "$(cache_label "$d" "$it")" "$rdm"
      echo "$(pkg_key "$d")" >> "$RUN_DIR/build-order.txt"
    done
    local fp
    for fp in "${!FETCH_DEPS[@]}"; do
      printf "    %-30s %s\n" "$fp" "fetch (sbopkg in container)"
    done
    return
  fi

  if ! confirm_order "$target_dir"; then
    echo "  aborted."
    ST_STATUS["$tkey"]="ABORTED"
    return
  fi

  # Per-run docker workdirs (host side, discarded after the run).
  DEPS_DIR="$RUN_DIR/deps"; BUILD_OUT="$RUN_DIR/out"
  mkdir -p "$DEPS_DIR" "$BUILD_OUT"

  local d failed_progs=()
  for d in "${RESOLVED_ORDER[@]}"; do
    local key; key="$(pkg_key "$d")"
    local prog; prog="$(basename "$d")"

    if depends_on_failed "$d" failed_progs; then
      ST_STATUS["$key"]="BLOCKED-BY-DEP"
      ST_REASON["$key"]="blocked by failed dep"
      [[ "${HAS_README[$d]:-}" == "1" ]] && ST_README["$key"]=1
      echo "  $key: BLOCKED-BY-DEP"
      failed_progs+=("$prog")
      continue
    fi

    local it=0; [[ "$d" == "$target_dir" ]] && it=1
    echo "  building $key ..."
    if build_one "$d" "$it"; then
      echo "  $key: ${ST_STATUS[$key]} (${ST_TIME[$key]}s)"
    else
      echo "  $key: ${ST_STATUS[$key]} (${ST_TIME[$key]}s)"
      failed_progs+=("$prog")
    fi
  done
}

# =============================================================================
# SUMMARY (ported)
# =============================================================================
print_summary() {
  local total=$SECONDS
  local succ=0 fail=0 blocked=0 cached=0
  local summary="$RUN_DIR/summary.log"

  {
    echo "test-build run summary"
    echo "target: $TARGET_ARG  version: $VERSION_ID"
    echo
  } > "$summary"

  echo
  echo "================ SUMMARY ================"
  local key
  for key in "${!ST_STATUS[@]}"; do
    local st="${ST_STATUS[$key]}" rsn="${ST_REASON[$key]:-}" t="${ST_TIME[$key]:-0}"
    local rd=""; [[ "${ST_README[$key]:-}" == "1" ]] && rd=" [%README%]"
    local col="$C_YEL"
    case "$st" in
      SUCCESS) col="$C_GRN"; ((succ++)) ;;
      CACHED)  col="$C_GRN"; ((cached++)) ;;
      BLOCKED-BY-DEP|UNMET-DEP|ABORTED) col="$C_YEL"; ((blocked++)) ;;
      *) col="$C_RED"; ((fail++)) ;;
    esac
    printf "%s%-30s %-16s%s %s%s (%ss)\n" "$col" "$key" "$st" "$C_RST" "$rsn" "$rd" "$t"
    printf "%-30s %-16s %s%s (%ss)\n" "$key" "$st" "$rsn" "$rd" "$t" >> "$summary"
  done
  echo "----------------------------------------"
  printf "%s%d succeeded%s, %s%d failed%s, %s%d blocked%s, %s%d cached%s, total %ss\n" \
    "$C_GRN" "$succ" "$C_RST" "$C_RED" "$fail" "$C_RST" "$C_YEL" "$blocked" "$C_RST" \
    "$C_GRN" "$cached" "$C_RST" "$total"
  echo "logs: $RUN_DIR"
  if [[ $fail -eq 0 && $blocked -eq 0 ]]; then
    echo "${C_GRN}All green.${C_RST} Safe to build the SBo submission tarball on the host."
  fi
  {
    echo
    echo "$succ succeeded, $fail failed, $blocked blocked, $cached cached, total ${total}s"
    echo "logs: $RUN_DIR"
  } >> "$summary"
}


# Ensure the selected image is available locally. It is built by a separate job
# (the image-builder) and pushed to the LAN registry; this script only consumes
# it. If it is not already local, pull it once (ACTIVE_IMAGE is a fully-qualified
# registry ref). A stale local tag is not refreshed here.
# ponytail: pull-if-missing only. If the registry's :current is rebuilt, the
#   local copy goes stale silently. Add a --pull force-flag if that bites.
require_image() {
  docker image inspect "$ACTIVE_IMAGE" >/dev/null 2>&1 && return 0
  echo "Image not present locally, pulling: $ACTIVE_IMAGE" >&2
  docker pull "$ACTIVE_IMAGE" >&2 && return 0
  cat >&2 <<EOF
Image not found and pull failed: $ACTIVE_IMAGE
It is produced by the image-builder job (full Slackware $VERSION_ID +
sbo-maintainer-tools + sbopkg) and pushed to the LAN registry. Check the
registry is reachable and the tag exists, then rerun. This script does not
build images.
EOF
  exit 1
}

main() {
  parse_args "$@"
  init_color
  require_config
  SBO_TREE_ROOTS=("$ACTIVE_TREE")
  load_overrides

  # image + cache namespace (skip the image check on a pure dry-run so the order
  # can be inspected without the image present).
  if [[ $DRY_RUN -eq 0 ]]; then
    command -v docker >/dev/null 2>&1 || { echo "docker not found in PATH." >&2; exit 1; }
    require_image
  fi
  resolve_cache_root

  RUN_DIR="$LOG_ROOT/$(date +%Y-%m-%d_%H-%M-%S)"
  mkdir -p "$RUN_DIR"
  : > "$RUN_DIR/build-order.txt"

  # The target is the local SlackBuild under test (CWD or a path); its deps are
  # resolved from the configured SBo tree during _resolve_visit.
  local tdir
  if ! tdir="$(resolve_target_dir "$TARGET_ARG")"; then
    exit 1
  fi

  run_target "$tdir"
  print_summary
}

main "$@"