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#!/usr/bin/env bash
set -euo pipefail
ROOT="$HOME/dox/st33v.com"
FORGE="$ROOT/forge"
IN="$FORGE/in"
OUT="$FORGE/out"
TPL="$FORGE/template"
die() { echo "[sotd-build] $*" >&2; exit 1; }
# --- sanity checks --------------------------------------------------------
wav=( "$IN"/*.wav )
[[ -e "${wav[0]}" ]] || die "No wav file in forge/in"
[[ ${#wav[@]} -eq 1 ]] || die "More than one wav in forge/in (ambiguous)"
[[ -f "$TPL/title" ]] || die "template/title missing"
template_file="$TPL/release.template"
[[ -f "$template_file" ]] || die "release.template missing"
# --- derive variables -----------------------------------------------------
date_today="$(date -I)"
slug="sotd-$date_today"
release_dir="$OUT/$slug"
mkdir -p "$release_dir"
title="$(cat "$TPL/title")"
cover_desc="Cover image for the song: $title"
has_lyrics=false
lyrics_md=""
if [[ -f "$TPL/lyrics" ]]; then
has_lyrics=true
lyrics_md="$(sed 's/$/ /' "$TPL/lyrics")"
fi
# synopsis: first ~3 lines, <256 chars, joined by " / "
synopsis=""
if $has_lyrics; then
synopsis="$(head -n 3 "$TPL/lyrics" \
| tr '\n' '/' \
| sed 's|/| / |g' \
| cut -c1-255)"
fi
# --- render template ------------------------------------------------------
export TITLE="$title"
export SLUG="$slug"
export DATE_TODAY="$date_today"
export COVER_DESC="$cover_desc"
export SYNOPSIS="$synopsis"
export LYRICS_MD="$lyrics_md"
release_eno="$release_dir/release.eno"
perl -0777 -pe '
s/\{\{title\}\}/$ENV{TITLE}/g;
s/\{\{slug\}\}/$ENV{SLUG}/g;
s/\{\{date_today\}\}/$ENV{DATE_TODAY}/g;
s/\{\{cover_image_desc\}\}/$ENV{COVER_DESC}/g;
s/\{\{synopsis\}\}/$ENV{SYNOPSIS}/g;
s/\{\{lyrics_md\}\}/$ENV{LYRICS_MD}/g;
' "$template_file" > "$release_eno"
# --- move assets ----------------------------------------------------------
mv "${wav[0]}" "$release_dir/"
if [[ -f "$TPL/cover.jpg" ]]; then
cp "$TPL/cover.jpg" "$release_dir/cover.jpg"
fi
# marker to show build complete
touch "$release_dir/BUILT"
echo "[sotd-build] Built $release_dir"
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