#!/bin/sh
# Copy the installers from the source repo into this one.
#
# agent-standups is canonical: install.sh and install.ps1 are tracked there,
# the probe harness reads them from the repo root (run-all.sh passes
# $REPO/install.sh to the R06 probes), and P8-24 copies them. This repo is the
# public face, so the files are copied rather than symlinked -- Gitea's raw/
# endpoint serves a symlink's link text, which would pipe a path into the
# user's shell instead of a script.
#
# Run this before committing here, whenever the installers change.
set -eu

SRC="${1:-../agent-standups}"
[ -f "$SRC/install.sh" ] || { echo "error: no install.sh under $SRC" >&2; exit 1; }

changed=0
for f in install.sh install.ps1; do
  if ! cmp -s "$SRC/$f" "$f" 2>/dev/null; then
    cp "$SRC/$f" "$f"
    echo "  updated $f"
    changed=1
  fi
done
chmod +x install.sh

# The README's title carries the current version, rewritten here rather than
# typed, for the same reason as the changelog: a hand-kept number goes stale
# the release after someone forgets. Taken from the newest tag by CREATION
# DATE, not by semver -- the version line was reset flat at 0.1.0, so
# v0.7.0-rc1 sorts higher than the current release (the same trap C24 hit).
ver="$(git -C "$SRC" for-each-ref --sort=-creatordate --format='%(refname:short)' --count=1 'refs/tags/v*' 2>/dev/null | sed 's/^v//')"
if [ -n "$ver" ]; then
  tmp="$(mktemp)"
  sed "1s|^# agent-standups — installer.*|# agent-standups — installer (current version: $ver)|" README.md > "$tmp"
  if ! cmp -s "$tmp" README.md; then
    mv "$tmp" README.md
    echo "  updated README.md title to $ver"
    changed=1
  else
    rm -f "$tmp"
  fi
fi

# CHANGELOG.md is docs/release-notes.md from 0.1.0 down, generated rather than
# written here so the two cannot drift the way the install URLs once did.
#
# It stops at 0.1.0 on purpose. Below it the file carries the retired rc
# lineage -- 0.5.0-rc3, 0.3.0, 0.2.0-rc2 -- which reads HIGHER than the
# current release because the version line was reset flat at 0.1.0. Shipping
# those to users invites "why is 0.5 older than 0.1?" on every read.
NOTES="$SRC/docs/release-notes.md"
if [ -f "$NOTES" ]; then
  end="$(grep -n '^# 0\.5\.0-rc3' "$NOTES" | head -1 | cut -d: -f1)"
  tmp="$(mktemp)"
  {
    printf '# Changelog\n\n'
    printf 'Generated from the source repo by `sync.sh`; do not edit here.\n'
    printf 'Starts at 0.1.0, where the version line was reset flat.\n\n'
    if [ -n "$end" ]; then
      # Back past the 0.5.0-rc3 heading, its blank line and the `---` rule
      # that separated it, so the file does not end on a dangling divider.
      head -n "$((end - 3))" "$NOTES"
    else
      cat "$NOTES"
    fi
  } > "$tmp"
  if ! cmp -s "$tmp" CHANGELOG.md 2>/dev/null; then
    mv "$tmp" CHANGELOG.md
    echo "  updated CHANGELOG.md"
    changed=1
  else
    rm -f "$tmp"
  fi
fi

[ "$changed" = 1 ] || echo "  already in sync with $SRC"