1#compdef _git-bug git-bug
2
3# zsh completion for git-bug -*- shell-script -*-
4
5__git-bug_debug()
6{
7 local file="$BASH_COMP_DEBUG_FILE"
8 if [[ -n ${file} ]]; then
9 echo "$*" >> "${file}"
10 fi
11}
12
13_git-bug()
14{
15 local shellCompDirectiveError=1
16 local shellCompDirectiveNoSpace=2
17 local shellCompDirectiveNoFileComp=4
18 local shellCompDirectiveFilterFileExt=8
19 local shellCompDirectiveFilterDirs=16
20
21 local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace
22 local -a completions
23
24 __git-bug_debug "\n========= starting completion logic =========="
25 __git-bug_debug "CURRENT: ${CURRENT}, words[*]: ${words[*]}"
26
27 # The user could have moved the cursor backwards on the command-line.
28 # We need to trigger completion from the $CURRENT location, so we need
29 # to truncate the command-line ($words) up to the $CURRENT location.
30 # (We cannot use $CURSOR as its value does not work when a command is an alias.)
31 words=("${=words[1,CURRENT]}")
32 __git-bug_debug "Truncated words[*]: ${words[*]},"
33
34 lastParam=${words[-1]}
35 lastChar=${lastParam[-1]}
36 __git-bug_debug "lastParam: ${lastParam}, lastChar: ${lastChar}"
37
38 # For zsh, when completing a flag with an = (e.g., git-bug -n=<TAB>)
39 # completions must be prefixed with the flag
40 setopt local_options BASH_REMATCH
41 if [[ "${lastParam}" =~ '-.*=' ]]; then
42 # We are dealing with a flag with an =
43 flagPrefix="-P ${BASH_REMATCH}"
44 fi
45
46 # Prepare the command to obtain completions
47 requestComp="${words[1]} __complete ${words[2,-1]}"
48 if [ "${lastChar}" = "" ]; then
49 # If the last parameter is complete (there is a space following it)
50 # We add an extra empty parameter so we can indicate this to the go completion code.
51 __git-bug_debug "Adding extra empty parameter"
52 requestComp="${requestComp} \"\""
53 fi
54
55 __git-bug_debug "About to call: eval ${requestComp}"
56
57 # Use eval to handle any environment variables and such
58 out=$(eval ${requestComp} 2>/dev/null)
59 __git-bug_debug "completion output: ${out}"
60
61 # Extract the directive integer following a : from the last line
62 local lastLine
63 while IFS='\n' read -r line; do
64 lastLine=${line}
65 done < <(printf "%s\n" "${out[@]}")
66 __git-bug_debug "last line: ${lastLine}"
67
68 if [ "${lastLine[1]}" = : ]; then
69 directive=${lastLine[2,-1]}
70 # Remove the directive including the : and the newline
71 local suffix
72 (( suffix=${#lastLine}+2))
73 out=${out[1,-$suffix]}
74 else
75 # There is no directive specified. Leave $out as is.
76 __git-bug_debug "No directive found. Setting do default"
77 directive=0
78 fi
79
80 __git-bug_debug "directive: ${directive}"
81 __git-bug_debug "completions: ${out}"
82 __git-bug_debug "flagPrefix: ${flagPrefix}"
83
84 if [ $((directive & shellCompDirectiveError)) -ne 0 ]; then
85 __git-bug_debug "Completion received error. Ignoring completions."
86 return
87 fi
88
89 while IFS='\n' read -r comp; do
90 if [ -n "$comp" ]; then
91 # If requested, completions are returned with a description.
92 # The description is preceded by a TAB character.
93 # For zsh's _describe, we need to use a : instead of a TAB.
94 # We first need to escape any : as part of the completion itself.
95 comp=${comp//:/\\:}
96
97 local tab=$(printf '\t')
98 comp=${comp//$tab/:}
99
100 __git-bug_debug "Adding completion: ${comp}"
101 completions+=${comp}
102 lastComp=$comp
103 fi
104 done < <(printf "%s\n" "${out[@]}")
105
106 if [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ]; then
107 __git-bug_debug "Activating nospace."
108 noSpace="-S ''"
109 fi
110
111 if [ $((directive & shellCompDirectiveFilterFileExt)) -ne 0 ]; then
112 # File extension filtering
113 local filteringCmd
114 filteringCmd='_files'
115 for filter in ${completions[@]}; do
116 if [ ${filter[1]} != '*' ]; then
117 # zsh requires a glob pattern to do file filtering
118 filter="\*.$filter"
119 fi
120 filteringCmd+=" -g $filter"
121 done
122 filteringCmd+=" ${flagPrefix}"
123
124 __git-bug_debug "File filtering command: $filteringCmd"
125 _arguments '*:filename:'"$filteringCmd"
126 elif [ $((directive & shellCompDirectiveFilterDirs)) -ne 0 ]; then
127 # File completion for directories only
128 local subdir
129 subdir="${completions[1]}"
130 if [ -n "$subdir" ]; then
131 __git-bug_debug "Listing directories in $subdir"
132 pushd "${subdir}" >/dev/null 2>&1
133 else
134 __git-bug_debug "Listing directories in ."
135 fi
136
137 local result
138 _arguments '*:dirname:_files -/'" ${flagPrefix}"
139 result=$?
140 if [ -n "$subdir" ]; then
141 popd >/dev/null 2>&1
142 fi
143 return $result
144 else
145 __git-bug_debug "Calling _describe"
146 if eval _describe "completions" completions $flagPrefix $noSpace; then
147 __git-bug_debug "_describe found some completions"
148
149 # Return the success of having called _describe
150 return 0
151 else
152 __git-bug_debug "_describe did not find completions."
153 __git-bug_debug "Checking if we should do file completion."
154 if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then
155 __git-bug_debug "deactivating file completion"
156
157 # We must return an error code here to let zsh know that there were no
158 # completions found by _describe; this is what will trigger other
159 # matching algorithms to attempt to find completions.
160 # For example zsh can match letters in the middle of words.
161 return 1
162 else
163 # Perform file completion
164 __git-bug_debug "Activating file completion"
165
166 # We must return the result of this command, so it must be the
167 # last command, or else we must store its result to return it.
168 _arguments '*:filename:_files'" ${flagPrefix}"
169 fi
170 fi
171 fi
172}
173
174# don't run the completion function when being source-ed or eval-ed
175if [ "$funcstack[1]" = "_git-bug" ]; then
176 _git-bug
177fi