1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
#!/usr/bin/env bash
# gstack-update-check — daily version check for all skills.
#
# Output (one line, or nothing):
# JUST_UPGRADED <old> <new> — marker found from recent upgrade
# UPGRADE_AVAILABLE <old> <new> — remote VERSION differs from local
# (nothing) — up to date or check skipped
#
# Env overrides (for testing):
# GSTACK_DIR — override auto-detected gstack root
# GSTACK_REMOTE_URL — override remote VERSION URL
# GSTACK_STATE_DIR — override ~/.gstack state directory
set -euo pipefail
GSTACK_DIR="${GSTACK_DIR:-$(cd "$(dirname "$0")/.." && pwd)}"
STATE_DIR="${GSTACK_STATE_DIR:-$HOME/.gstack}"
CACHE_FILE="$STATE_DIR/last-update-check"
MARKER_FILE="$STATE_DIR/just-upgraded-from"
VERSION_FILE="$GSTACK_DIR/VERSION"
REMOTE_URL="${GSTACK_REMOTE_URL:-https://raw.githubusercontent.com/garrytan/gstack/main/VERSION}"
# ─── Step 1: Read local version ──────────────────────────────
LOCAL=""
if [ -f "$VERSION_FILE" ]; then
LOCAL="$(cat "$VERSION_FILE" 2>/dev/null | tr -d '[:space:]')"
fi
if [ -z "$LOCAL" ]; then
exit 0 # No VERSION file → skip check
fi
# ─── Step 2: Check "just upgraded" marker ─────────────────────
if [ -f "$MARKER_FILE" ]; then
OLD="$(cat "$MARKER_FILE" 2>/dev/null | tr -d '[:space:]')"
rm -f "$MARKER_FILE"
mkdir -p "$STATE_DIR"
echo "UP_TO_DATE $LOCAL" > "$CACHE_FILE"
if [ -n "$OLD" ]; then
echo "JUST_UPGRADED $OLD $LOCAL"
fi
exit 0
fi
# ─── Step 3: Check cache freshness (24h = 1440 min) ──────────
if [ -f "$CACHE_FILE" ]; then
# Cache is fresh if modified within 1440 minutes
STALE=$(find "$CACHE_FILE" -mmin +1440 2>/dev/null || true)
if [ -z "$STALE" ]; then
# Cache is fresh — read it
CACHED="$(cat "$CACHE_FILE" 2>/dev/null || true)"
case "$CACHED" in
UP_TO_DATE*)
# Verify local version still matches cached version
CACHED_VER="$(echo "$CACHED" | awk '{print $2}')"
if [ "$CACHED_VER" = "$LOCAL" ]; then
exit 0
fi
# Local version changed — fall through to re-check
;;
UPGRADE_AVAILABLE*)
# Verify local version still matches cached old version
CACHED_OLD="$(echo "$CACHED" | awk '{print $2}')"
if [ "$CACHED_OLD" = "$LOCAL" ]; then
echo "$CACHED"
exit 0
fi
# Local version changed (manual upgrade?) — fall through to re-check
;;
esac
fi
fi
# ─── Step 4: Slow path — fetch remote version ────────────────
mkdir -p "$STATE_DIR"
REMOTE=""
REMOTE="$(curl -sf --max-time 5 "$REMOTE_URL" 2>/dev/null || true)"
REMOTE="$(echo "$REMOTE" | tr -d '[:space:]')"
# Validate: must look like a version number (reject HTML error pages)
if ! echo "$REMOTE" | grep -qE '^[0-9]+\.[0-9.]+$'; then
# Invalid or empty response — assume up to date
echo "UP_TO_DATE $LOCAL" > "$CACHE_FILE"
exit 0
fi
if [ "$LOCAL" = "$REMOTE" ]; then
echo "UP_TO_DATE $LOCAL" > "$CACHE_FILE"
exit 0
fi
# Versions differ — upgrade available
echo "UPGRADE_AVAILABLE $LOCAL $REMOTE" > "$CACHE_FILE"
echo "UPGRADE_AVAILABLE $LOCAL $REMOTE"