gabriel / build-with-muse public
make-git-episode00-demo.sh bash
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sha256:5472be4fece32b606c308fad9d57295ce327955fb2b87b8beec6ea1626050473 Add published YouTube URL to Episode 00 Sonnet 5 3 hours ago
1 #!/usr/bin/env bash
2 set -euo pipefail
3
4 DEMO_DIR="${1:-muse-git-demo}"
5
6 setup() {
7 rm -rf "$DEMO_DIR"
8 mkdir -p "$DEMO_DIR"
9 cd "$DEMO_DIR"
10
11 git init -q
12
13 cat > calculator.py <<'PY'
14 def calculate_total(items):
15 return sum(item["price"] for item in items)
16
17 if __name__ == "__main__":
18 cart = [{"price": 10}, {"price": 15}]
19 print(calculate_total(cart))
20 PY
21
22 mkdir -p app
23 for i in $(seq -w 1 20); do
24 cat > "app/module_${i}.py" <<PY
25 from calculator import calculate_total
26
27 def report_${i}(items):
28 return calculate_total(items)
29 PY
30 done
31
32 python3 - <<'PY'
33 from pathlib import Path
34
35 notes = [60, 64, 67, 72]
36 track = bytearray()
37 track += bytes([0x00, 0xFF, 0x51, 0x03, 0x07, 0xA1, 0x20])
38
39 for note in notes:
40 track += bytes([0x00, 0x90, note, 100])
41 track += bytes([0x60, 0x80, note, 64])
42
43 track += bytes([0x00, 0xFF, 0x2F, 0x00])
44
45 header = b"MThd" + (6).to_bytes(4, "big") + (0).to_bytes(2, "big") + (1).to_bytes(2, "big") + (96).to_bytes(2, "big")
46 chunk = b"MTrk" + len(track).to_bytes(4, "big") + track
47 Path("melody.mid").write_bytes(header + chunk)
48 PY
49
50 git add .
51 git commit -qm "Initial demo state"
52
53 echo
54 echo "Created: $(pwd)"
55 echo "Baseline commit:"
56 git --no-pager log --oneline -1
57 }
58
59 python_change() {
60 cd "$DEMO_DIR"
61 python3 - <<'PY'
62 from pathlib import Path
63 p = Path("calculator.py")
64 s = p.read_text()
65 s = s.replace(
66 'return sum(item["price"] for item in items)',
67 'return round(sum(item["price"] for item in items), 2)'
68 )
69 p.write_text(s)
70 PY
71 }
72
73 rename_change() {
74 cd "$DEMO_DIR"
75 python3 - <<'PY'
76 from pathlib import Path
77 for p in [Path("calculator.py"), *sorted(Path("app").glob("*.py"))]:
78 s = p.read_text().replace("calculate_total", "compute_total")
79 p.write_text(s)
80 PY
81 }
82
83 midi_change() {
84 cd "$DEMO_DIR"
85 python3 - <<'PY'
86 from pathlib import Path
87 p = Path("melody.mid")
88 data = bytearray(p.read_bytes())
89 mapping = {60: 62, 64: 65, 67: 69, 72: 74}
90 for i in range(1, len(data)):
91 if data[i-1] in (0x90, 0x80) and data[i] in mapping:
92 data[i] = mapping[data[i]]
93 p.write_bytes(data)
94 PY
95 }
96
97 reset_demo() {
98 cd "$DEMO_DIR"
99 git reset --hard -q HEAD
100 git clean -fdq
101 }
102
103 case "${2:-setup}" in
104 setup) setup ;;
105 python-change) python_change ;;
106 rename-change) rename_change ;;
107 midi-change) midi_change ;;
108 reset) reset_demo ;;
109 *)
110 echo "Usage: $0 [demo-dir] {setup|python-change|rename-change|midi-change|reset}"
111 exit 1
112 ;;
113 esac
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sha256:5472be4fece32b606c308fad9d57295ce327955fb2b87b8beec6ea1626050473 Add published YouTube URL to Episode 00 Sonnet 5 3 hours ago