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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 export DECOMPRESS='{{ DECOMPRESS }}' # Command to decompress data
12
13 # Header: 0
14 # runscript: 1
15 # payload: 2
16 extract_chunk_index() {
17 local src="${1}"
18 local dest="${2}"
19 local index="${3}"
20 local skip=0 # Byte count to skip into source
21 local of # Output path with 'of=' prefix. Only used if dest is not '-'
22
23 for (( i = 0; i < index; i++ )); do
24 skip=$(( skip + LENS[$i] ))
25 done
26
27 [ "${dest}" != '-' ] && of="of=${dest}"
28 # Extract the requested chunk index
29 dd bs=${LENS[$index]} count=1 iflag=skip_bytes skip=${skip} \
30 if=${src} ${of} 2>/dev/null
31 }
32
33 extract_header() {
34 extract_chunk_index "${SELF}" "${TMP}/header.sh" 0
35 }
36
37 extract_libinstall() {
38 extract_chunk_index "${SELF}" '-' 1 | ${DECOMPRESS} | tar -C "${TMP}" -x
39 }
40
41 extract_runscript() {
42 extract_chunk_index "${SELF}" '-' 2 | ${DECOMPRESS} > "${TMP}/run.sh"
43 }
44
45 extract_payload() {
46 extract_chunk_index "${SELF}" '-' 3 | ${DECOMPRESS} | tar -C "${TMP}" -x
47 export PAYLOAD="${TMP}/pkg"
48 }
49
50
51 main() {
52 SELF="$(cd $(dirname ${0}) && pwd)/$(basename ${0})"
53 TMP="$(mktemp -d /tmp/installer-XXXXXXX)"
54
55 extract_header
56 extract_libinstall
57 extract_runscript
58
59 cd "${TMP}"
60
61 source libinstall/template.sh
62 source libinstall/ensure.sh
63
64 source run.sh
65
66 # Function 'deploy' is provided by run.sh
67 if [ "$(type -t deploy)" == 'function' ]; then
68 deploy ${@}
69 else
70 printf "ERROR: Deploy function not found.\n"
71 fi
72
73 # Cleanup
74 [ -z "${NOCLEANUP:-}" ] && rm -rf "${TMP}"
75 }
76
77 main ${@}
78 exit 0
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