blob: 766ba0a0ed822b6f1f522e9b2d923027a1ba1f3b (
plain)
1 #!/usr/bin/env bash
2
3 # This is a pre-allocated string of 30 chars of whitespace
4 # DO NOT CHANGE THIS without great care - it will break header length
5 # calculations
6 LENS=( )
7 export SELF # Absolute path to the installer script (me!)
8 export TMP # Path to tmp install staging directory
9 export PAYLOAD # Path to the extracted payload directory
10 export NOCLEANUP # Do not clean up deploy resources. Useful for debugging
11
12 # Header: 0
13 # runscript: 1
14 # payload: 2
15 extract_chunk_index() {
16 local src="${1}"
17 local dest="${2}"
18 local index="${3}"
19 local skip=0 # Byte count to skip into source
20 local of # Output path with 'of=' prefix. Only used if dest is not '-'
21
22 for (( i = 0; i < index; i++ )); do
23 skip=$(( skip + LENS[$i] ))
24 done
25
26 [ "${dest}" != '-' ] && of="${dest}"
27 # Extract the requested chunk index
28 dd bs=1 count=${LENS[$index]} iflag=skip_bytes skip=${skip} \
29 if=${src} ${of} 2>/dev/null
30 }
31
32 extract_header() {
33 extract_chunk_index "${SELF}" "${TMP}/header.sh" 0
34 }
35
36 extract_runscript() {
37 extract_chunk_index "${SELF}" '-' 1 | xz -d -c > "${TMP}/run.sh"
38 }
39
40 extract_payload() {
41 extract_chunk_index "${SELF}" '-' 2 | xz -d -c | tar -C "${TMP}" -x
42 export PAYLOAD="${TMP}/pkg"
43 }
44
45
46 main() {
47 SELF="$(cd $(dirname ${0}) && pwd)/$(basename ${0})"
48 TMP="$(mktemp -d /tmp/installer-XXXXXXX)"
49
50 extract_header
51 extract_runscript
52 #extract_chunks "${self}" "${tmp}"
53
54 cd "${TMP}"
55 source run.sh
56
57 # Function 'deploy' is provided by run.sh
58 if [ "$(type -t deploy)" == 'function' ]; then
59 deploy ${@}
60 else
61 printf "ERROR: Deploy function not found.\n"
62 fi
63
64 # Cleanup
65 [ -z "${NOCLEANUP:-}" ] && rm -rf "${TMP}"
66 }
67
68 main ${@}
69 exit 0
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