blob: a7b9269f37e2dd63489e8a700ff28301fcebb6ae (
plain)
1 #!/usr/bin/env bash
2
3 # This is a pre-allocated string of 39 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="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}" "${TMP}/header.sh" 0
34 }
35
36 extract_libinstall() {
37 extract_chunk_index "${SELF}" '-' 1 | xz -d -c | tar -C "${TMP}" -x
38 }
39
40 extract_runscript() {
41 extract_chunk_index "${SELF}" '-' 2 | xz -d -c > "${TMP}/run.sh"
42 }
43
44 extract_payload() {
45 extract_chunk_index "${SELF}" '-' 3 | xz -d -c | tar -C "${TMP}" -x
46 export PAYLOAD="${TMP}/pkg"
47 }
48
49
50 main() {
51 SELF="$(cd $(dirname ${0}) && pwd)/$(basename ${0})"
52 TMP="$(mktemp -d /tmp/installer-XXXXXXX)"
53
54 extract_header
55 extract_libinstall
56 extract_runscript
57
58 cd "${TMP}"
59
60 source libinstall/template.sh
61
62 source run.sh
63
64 # Function 'deploy' is provided by run.sh
65 if [ "$(type -t deploy)" == 'function' ]; then
66 deploy ${@}
67 else
68 printf "ERROR: Deploy function not found.\n"
69 fi
70
71 # Cleanup
72 [ -z "${NOCLEANUP:-}" ] && rm -rf "${TMP}"
73 }
74
75 main ${@}
76 exit 0
|
