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 compCount comp lastComp
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 [ $((directive & shellCompDirectiveError)) -ne 0 ]; then
85 __git-bug_debug "Completion received error. Ignoring completions."
86 return
87 fi
88
89 compCount=0
90 while IFS='\n' read -r comp; do
91 if [ -n "$comp" ]; then
92 # If requested, completions are returned with a description.
93 # The description is preceded by a TAB character.
94 # For zsh's _describe, we need to use a : instead of a TAB.
95 # We first need to escape any : as part of the completion itself.
96 comp=${comp//:/\\:}
97
98 local tab=$(printf '\t')
99 comp=${comp//$tab/:}
100
101 ((compCount++))
102 __git-bug_debug "Adding completion: ${comp}"
103 completions+=${comp}
104 lastComp=$comp
105 fi
106 done < <(printf "%s\n" "${out[@]}")
107
108 if [ $((directive & shellCompDirectiveFilterFileExt)) -ne 0 ]; then
109 # File extension filtering
110 local filteringCmd
111 filteringCmd='_files'
112 for filter in ${completions[@]}; do
113 if [ ${filter[1]} != '*' ]; then
114 # zsh requires a glob pattern to do file filtering
115 filter="\*.$filter"
116 fi
117 filteringCmd+=" -g $filter"
118 done
119 filteringCmd+=" ${flagPrefix}"
120
121 __git-bug_debug "File filtering command: $filteringCmd"
122 _arguments '*:filename:'"$filteringCmd"
123 elif [ $((directive & shellCompDirectiveFilterDirs)) -ne 0 ]; then
124 # File completion for directories only
125 local subDir
126 subdir="${completions[1]}"
127 if [ -n "$subdir" ]; then
128 __git-bug_debug "Listing directories in $subdir"
129 pushd "${subdir}" >/dev/null 2>&1
130 else
131 __git-bug_debug "Listing directories in ."
132 fi
133
134 _arguments '*:dirname:_files -/'" ${flagPrefix}"
135 if [ -n "$subdir" ]; then
136 popd >/dev/null 2>&1
137 fi
138 elif [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ] && [ ${compCount} -eq 1 ]; then
139 __git-bug_debug "Activating nospace."
140 # We can use compadd here as there is no description when
141 # there is only one completion.
142 compadd -S '' "${lastComp}"
143 elif [ ${compCount} -eq 0 ]; then
144 if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then
145 __git-bug_debug "deactivating file completion"
146 else
147 # Perform file completion
148 __git-bug_debug "activating file completion"
149 _arguments '*:filename:_files'" ${flagPrefix}"
150 fi
151 else
152 _describe "completions" completions $(echo $flagPrefix)
153 fi
154}
155
156# don't run the completion function when being source-ed or eval-ed
157if [ "$funcstack[1]" = "_git-bug" ]; then
158 _git-bug
159fi