summaryrefslogtreecommitdiff
path: root/libre/java-common/bin_parabola-java
blob: 47f410096dbec77276fee42d51cd6f56cfc94b2d (plain)
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
176
177
178
179
#! /bin/bash

# Parabola GNU/linux-libre helper script to set/unset/check/fix the enabled Java environment
# This program may be freely redistributed under the terms of the GNU General Public License
#
# Author: Guillaume ALAUX <guillaume@archlinux.org>
# Parabola Rebranding Author: André Silva <emulatorman@parabola.nu>

JVM_DIR=/usr/lib/jvm
DEFAULT_NAME=default
DEFAULT_PATH=${JVM_DIR}/${DEFAULT_NAME}
DEFAULT_NAME_JRE=default-runtime
DEFAULT_PATH_JRE=${JVM_DIR}/${DEFAULT_NAME_JRE}


# Utility functions

check_root() {
  if [ $(id -u) -ne 0 ]; then
    echo 'This script must be run as root'
    exit 1
  fi
}

# $1: parameter count given to this script for this option
# $2: expected parameter count for this option
check_param_count() {
  if [ $1 -ne $2 ]; then
    echo 'Wrong parameter count'
    exit 2
  fi
}

# Second level functions

get_default_java() {
  path=$(readlink -e ${DEFAULT_PATH})
  if [ "x${path}" != "x/dev/null" ]; then
    echo ${path/${JVM_DIR}\/}
  else
    echo ""
  fi
}

get_installed_javas() {
  if [ -d ${JVM_DIR} ]; then
    for dir in $(find ${JVM_DIR} -mindepth 1 -maxdepth 1 -type d | sort); do
      if [ -x ${dir}/bin/javac ]; then
        javas+=(${dir/${JVM_DIR}\/})
      else
        if [ -x ${dir}/jre/bin/java ]; then
        javas+=(${dir/${JVM_DIR}\/}/jre)
        fi
      fi
    done
  fi
  echo ${javas[@]}
}

# $1: Java environment name to test
is_java_valid() {
  test "x$1" != "x${DEFAULT_NAME}" && test -x ${JVM_DIR}/$1/bin/java
}

# $1: Java environment name to set as default
set_default_link_to() {
  new_default=$1
  unlink ${DEFAULT_PATH} 2>/dev/null
  ln -sf ${new_default} ${DEFAULT_PATH}

  unlink ${DEFAULT_PATH_JRE} 2>/dev/null
  if [[ ${new_default} == */jre ]]; then
    ln -sf ${new_default} ${DEFAULT_PATH_JRE}
  else
    ln -sf ${new_default}/jre ${DEFAULT_PATH_JRE}
  fi
}

unset_default_link() {
  unlink ${DEFAULT_PATH} 2>/dev/null
  unlink ${DEFAULT_PATH_JRE} 2>/dev/null
}

# First level functions

do_status() {
  installed_java=($(get_installed_javas))
  if [ ${#installed_java[@]} -eq 0 ]; then
    echo 'No compatible Java environment installed'
  else
    default_java=$(get_default_java)
    echo 'Available Java environments:'
    for java in ${installed_java[@]}; do
      if [ "${java}/jre" = "${default_java}" ]; then
        echo -e "  ${java} (${java}/jre default)"
      elif [ ${java} = "${default_java}" ]; then
        echo -e "  ${java} (default)"
      else
        echo "  ${java}"
      fi
    done
    if [ -z ${default_java} ]; then
      echo "No Java environment set as default"
    fi
  fi
}

do_get() {
  get_default_java
}

# $1: Java environment name to set as default
do_set() {
  if ! is_java_valid $1; then
    echo "'${JVM_DIR}/$1' is not a valid Java environment path"
    exit 1
  fi
  default=$(get_default_java)
  if [ "x$1" != "x${default}" ] || ! is_java_valid ${default}; then
    unset_default_link
    set_default_link_to $1
  fi

  #parent_dir=$(dirname $1)
  #if is_java_valid ${parent_dir}; then
  #  echo "Warning: '${parent_dir}' looks like a valid JDK whereas '$1' is set as default"
  #  echo "Fix this with 'parabola-java set ${parent_dir}'"
  #fi
}

# $1: Java environment name to unset
do_unset() {
  unset_default_link
}

do_fix() {
  default=$(get_default_java)
  if is_java_valid ${default}; then
    if is_java_valid $(dirname ${default}); then
      unset_default_link
      set_default_link_to $(dirname ${default})
    fi
  else
    prev=$(readlink ${DEFAULT_PATH})
    unset_default_link
    prev_fix=("${prev/\/jre}" "${prev}/jre")
    openjdk7=('java-7-openjdk' 'java-7-openjdk/jre')
    to_check=(${prev_fix[@]} ${openjdk7[@]} $(get_installed_javas))
    for java in ${to_check[@]}; do
      if ! is_java_valid $(get_default_java) && is_java_valid ${java}; then
        set_default_link_to ${java}
      fi
    done
  fi
  if ! is_java_valid $(get_default_java); then
    echo 'No valid Java environment found'
  fi
}

usage() {
  echo "$(basename $0) <COMMAND>"
  echo -e "\nCOMMAND:"
  echo -e '\tstatus\t\tList installed Java environments and enabled one'
  echo -e '\tget\t\tReturn the short name of the Java environment set as default'
  echo -e '\tset <JAVA_ENV>\tForce <JAVA_ENV> as default'
  echo -e '\tunset\t\tUnset current default Java environment'
  echo -e '\tfix\t\tFix an invalid/broken default Java environment configuration'
}

## Main
case $1 in
  'status') do_status;;
  'get')    do_get;;
  'set')    check_root; check_param_count $# 2; do_set $2;;
  'unset')  check_root; do_unset;;
  'fix')    check_root; do_fix;;
  'help' | '--help' | '-h' | '') usage;;
  *)           echo "$(basename $0): unknown option '$@'"; exit 1;;
esac