open


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
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175

#!/bin/bash
# replaces xdg-open
# inspired from mimi: https://github.com/taylorchu/mimi

_LINOPEN_CFGRC="$HOME/.linopenrc"
_LINOPEN_CFGSYS="/etc/linopen.conf"
_LINOPEN_CFGARG=

# helpers
err() { echo "$@"; exit 1; }
usage() { echo "usage: $(basename $0) [-c <config>] [file]"; }

# pipe configuration
getconfig() {
   # '#' are comments in configuration :)
   [[ -f "$_LINOPEN_CFGARG" ]] && { egrep -v "^(#|$)" "$_LINOPEN_CFGARG"; return; }
   [[ -f "$_LINOPEN_CFGRC" ]]  && { egrep -v "^(#|$)" "$_LINOPEN_CFGRC"; return; }
   [[ -f "$_LINOPEN_CFGSYS" ]] && { egrep -v "^(#|$)" "$_LINOPEN_CFGSYS"; return; }
}

# match regexp
# $1 = filename
match_regexp() {
   open_with=''
   getconfig | grep "^?" | while read cf; do
      exp="$(echo "$cf" | sed "s/?'\(.*\)':.*/\1/")"
      [[ -n "$(echo "$@" | grep "$exp")" ]] && {
         open_with="$(echo "$cf" | sed "s/?'.*':\(.*\)/\1/")";
      }
      # exit the loop once a match is encountered
      [[ ! "${open_with}" = '' ]] && echo "${open_with}" && exit 0
   done
}

# get terminal emulator from configuration
get_term() {
   # inside echo (strip whitespace)
   echo $(getconfig | grep -w "^terminal" | head -1 | cut -d = -f 2 | sed 's/[#].*//')
}

# check, if program needs terminal
# $1 = program
needs_term() {
   [[ -n "$(getconfig | grep -w "^interm=$@")" ]] &&
      return 0 || return 1
}

# check, if we need fork for terminal program
needs_fork() {
   # is either ran from shell or from script
   if [[ "$(ps -o stat= -p $PPID)" == *S* ]]; then
      # + == not backgrounded
      [[ "$(ps -o stat= -p $$)"    == *+* ]] &&
         return 1 || return 0
   fi
}

# launch file with correct program
# $1 = filename
# $2 = forced program
launch() {
   local program="$2"
   local interm=0

   # is directory?
   [[ -d "$1" ]] && {
      program="$(getconfig | grep "^directory:" | cut -d : -f 2)"
   }

   # if not directory, and file doesn't exist
   # try matching regexp
   [[ ! -n "$program" ]] && [[ ! -f "$1" ]] &&
      regexp="$(match_regexp "$1")"

   # if file not found and no matching regexp
   [[ ! -f "$1" ]] && [[ ! -d "$1" ]] && [[ ! -n "$regexp" ]] && {
      err "file does not exist: $1";
   } || {
      [[ -n "$program" ]] || program="$regexp"
   }

   # test against extension
   [[ -n "$program" ]] || {
      local ext=${1##*.};
      program="$(getconfig | grep "^.$ext:" | cut -d : -f 2)"
   }

   # test against whole mime type
   [[ -n "$program" ]] || program="$(getconfig | \
      grep "^$(file -L -b --mime-type "$1"):" | head -1 | cut -d : -f 2)"

   # test against video/, text/ (first part of mime type)
   [[ -n "$program" ]] || program="$(getconfig | \
      grep "^$(file -L -b --mime-type "$1" | sed 's/\(.*\)\/.*/\1:/')" | \
      head -1 | cut -d : -f 2)"

   # test against regexp
   [[ -n "$program" ]] || program="$(match_regexp "$1")"

   # test against default as last try
   [[ -n "$program" ]] || program="$(getconfig | grep "^default:" | \
      head -1 | cut -d : -f 2)"

   # check arguments
   [[ -n "$(echo "$program" | grep "\->interm")" ]] && interm=1

   # sed out the arguments || comments
   program="$(echo "$program" | sed 's/->.*//;s/[#].*//')"
   program="$(echo $program)" # strip leading&&trailing whitespace

   # check if program is enviroiment variable
   [[ -n "$(echo "$program" | grep '^\$')" ]] && {
      program="$(echo "$program" | sed 's/^\$//')"
      program="$(env | grep "$program" | head -1 | cut -d = -f 2)"
   }

   # no program found
   [[ -n "$program" ]] ||
      err "could not find program for '$(basename $1)', check your configuration"

   # check if we need term or fork
   if [[ $interm -eq 1 ]] || needs_term "$program"; then
      if needs_fork; then
         # open in new terminal
         "$(get_term)" -e "$program" "$1" &
      else
         # open in current terminal
         "$program" "$1"
      fi
   else
      # echo program is exception here
      [[ "$program" == "echo" ]] && { echo "$1"; } || {
         # open in background (redirects everything to /dev/null)
         "$program" "$1" &> /dev/null &
      }
   fi
}

# handle file
# $1 = filename
handle() {
   local filename="$@"
   [[ -n "$(echo $filename | grep "^file://")" ]] && {
      filename="${filename##file://}"
   }
   launch "$filename"
}

main() {
   # print usage if no arguments
   [[ -n "$@" ]] || { usage; exit 1; }

   # check configuration argument
   [[ "$1" == "-c" ]] && {
      shift 1; _LINOPEN_CFGARG="$1";
      [[ -f "$_LINOPEN_CFGARG" ]] ||
         err "no configuration exists: $_LINOPEN_CFGARG"
      shift 1
   }

   # check that everything is ok
   [[ -n "$(getconfig)" ]] ||
      err "no configuration exists: /etc/linopen.conf || ~/.linopenrc or the file is empty"
   [[ -n "$(getconfig | grep "^default:")" ]] ||
      err "rule must exist in configuration: 'default:'"

   # handle arguments
   while [[ -n "$1" ]]; do
      handle "$1"
      shift || break
   done
}
main "$@"

# vim: set ts=8 sw=3 tw=0 :