forked from containers/podman
/
podman.fish
168 lines (134 loc) · 6.24 KB
/
podman.fish
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
# fish completion for podman -*- shell-script -*-
function __podman_debug
set file "$BASH_COMP_DEBUG_FILE"
if test -n "$file"
echo "$argv" >> $file
end
end
function __podman_perform_completion
__podman_debug "Starting __podman_perform_completion"
set args (string split -- " " (string trim -l (commandline -c)))
set lastArg "$args[-1]"
__podman_debug "args: $args"
__podman_debug "last arg: $lastArg"
set emptyArg ""
if test -z "$lastArg"
__podman_debug "Setting emptyArg"
set emptyArg \"\"
end
__podman_debug "emptyArg: $emptyArg"
set requestComp "$args[1] __complete $args[2..-1] $emptyArg"
__podman_debug "Calling $requestComp"
# Call the command as a sub-shell so that we can redirect any errors
# For example, if $requestComp has an unmatched quote
# https://github.com/spf13/cobra/issues/1214
set results (fish -c "$requestComp" 2> /dev/null)
set comps $results[1..-2]
set directiveLine $results[-1]
# For Fish, when completing a flag with an = (e.g., <program> -n=<TAB>)
# completions must be prefixed with the flag
set flagPrefix (string match -r -- '-.*=' "$lastArg")
__podman_debug "Comps: $comps"
__podman_debug "DirectiveLine: $directiveLine"
__podman_debug "flagPrefix: $flagPrefix"
for comp in $comps
printf "%s%s\n" "$flagPrefix" "$comp"
end
printf "%s\n" "$directiveLine"
end
# This function does two things:
# - Obtain the completions and store them in the global __podman_comp_results
# - Return false if file completion should be performed
function __podman_prepare_completions
__podman_debug ""
__podman_debug "========= starting completion logic =========="
# Start fresh
set --erase __podman_comp_results
set results (__podman_perform_completion)
__podman_debug "Completion results: $results"
if test -z "$results"
__podman_debug "No completion, probably due to a failure"
# Might as well do file completion, in case it helps
return 1
end
set directive (string sub --start 2 $results[-1])
set --global __podman_comp_results $results[1..-2]
__podman_debug "Completions are: $__podman_comp_results"
__podman_debug "Directive is: $directive"
set shellCompDirectiveError 1
set shellCompDirectiveNoSpace 2
set shellCompDirectiveNoFileComp 4
set shellCompDirectiveFilterFileExt 8
set shellCompDirectiveFilterDirs 16
if test -z "$directive"
set directive 0
end
set compErr (math (math --scale 0 $directive / $shellCompDirectiveError) % 2)
if test $compErr -eq 1
__podman_debug "Received error directive: aborting."
# Might as well do file completion, in case it helps
return 1
end
set filefilter (math (math --scale 0 $directive / $shellCompDirectiveFilterFileExt) % 2)
set dirfilter (math (math --scale 0 $directive / $shellCompDirectiveFilterDirs) % 2)
if test $filefilter -eq 1; or test $dirfilter -eq 1
__podman_debug "File extension filtering or directory filtering not supported"
# Do full file completion instead
return 1
end
set nospace (math (math --scale 0 $directive / $shellCompDirectiveNoSpace) % 2)
set nofiles (math (math --scale 0 $directive / $shellCompDirectiveNoFileComp) % 2)
__podman_debug "nospace: $nospace, nofiles: $nofiles"
# If we want to prevent a space, or if file completion is NOT disabled,
# we need to count the number of valid completions.
# To do so, we will filter on prefix as the completions we have received
# may not already be filtered so as to allow fish to match on different
# criteria than the prefix.
if test $nospace -ne 0; or test $nofiles -eq 0
set prefix (commandline -t)
__podman_debug "prefix: $prefix"
set completions
for comp in $__podman_comp_results
if test (string match -e -r -- "^$prefix" "$comp")
set -a completions $comp
end
end
set --global __podman_comp_results $completions
__podman_debug "Filtered completions are: $__podman_comp_results"
# Important not to quote the variable for count to work
set numComps (count $__podman_comp_results)
__podman_debug "numComps: $numComps"
if test $numComps -eq 1; and test $nospace -ne 0
# To support the "nospace" directive we trick the shell
# by outputting an extra, longer completion.
# We must first split on \t to get rid of the descriptions because
# the extra character we add to the fake second completion must be
# before the description. We don't need descriptions anyway since
# there is only a single real completion which the shell will expand
# immediately.
__podman_debug "Adding second completion to perform nospace directive"
set split (string split --max 1 \t $__podman_comp_results[1])
set --global __podman_comp_results $split[1] $split[1].
__podman_debug "Completions are now: $__podman_comp_results"
end
if test $numComps -eq 0; and test $nofiles -eq 0
# To be consistent with bash and zsh, we only trigger file
# completion when there are no other completions
__podman_debug "Requesting file completion"
return 1
end
end
return 0
end
# Since Fish completions are only loaded once the user triggers them, we trigger them ourselves
# so we can properly delete any completions provided by another script.
# The space after the program name is essential to trigger completion for the program
# and not completion of the program name itself.
complete --do-complete "podman " > /dev/null 2>&1
# Using '> /dev/null 2>&1' since '&>' is not supported in older versions of fish.
# Remove any pre-existing completions for the program since we will be handling all of them.
complete -c podman -e
# The call to __podman_prepare_completions will setup __podman_comp_results
# which provides the program's completion choices.
complete -c podman -n '__podman_prepare_completions' -f -a '$__podman_comp_results'
# This file is generated with "podman completion"; see: podman-completion(1)