GitTabExpansion.ps1

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
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
# Initial implementation by Jeremy Skinner
# http://www.jeremyskinner.co.uk/2010/03/07/using-git-with-windows-powershell/

$Global:GitTabSettings = New-Object PSObject -Property @{
    AllCommands = $false
}

$subcommands = @{
    bisect = 'start bad good skip reset visualize replay log run'
    notes = 'edit show'
    reflog = 'expire delete show'
    remote = 'add rename rm set-head show prune update'
    stash = 'list show drop pop apply branch save clear create'
    submodule = 'add status init update summary foreach sync'
    svn = 'init fetch clone rebase dcommit branch tag log blame find-rev set-tree create-ignore show-ignore mkdirs commit-diff info proplist propget show-externals gc reset'
    tfs = 'bootstrap checkin checkintool ct cleanup cleanup-workspaces clone diagnostics fetch help init pull quick-clone rcheckin shelve shelve-list unshelve verify'
    flow = 'init feature bugfix release hotfix support help version config finish delete publish rebase'
    worktree = 'add list prune'
}

$gitflowsubcommands = @{
    init = 'help'
    feature = 'list start finish publish track diff rebase checkout pull help delete'
    bugfix = 'list start finish publish track diff rebase checkout pull help delete'
    release = 'list start finish track publish help delete'
    hotfix = 'list start finish track publish help delete'
    support = 'list start help'
    config = 'list set base'
}

function script:gitCmdOperations($commands, $command, $filter) {
    $commands.$command -split ' ' | Where-Object { $_ -like "$filter*" }
}

$script:someCommands = @('add','am','annotate','archive','bisect','blame','branch','bundle','checkout','cherry',
                         'cherry-pick','citool','clean','clone','commit','config','describe','diff','difftool','fetch',
                         'format-patch','gc','grep','gui','help','init','instaweb','log','merge','mergetool','mv',
                         'notes','prune','pull','push','rebase','reflog','remote','rerere','reset','revert','rm',
                         'shortlog','show','stash','status','submodule','svn','tag','whatchanged', 'worktree')

$script:gitCommandsWithLongParams = $longGitParams.Keys -join '|'
$script:gitCommandsWithShortParams = $shortGitParams.Keys -join '|'
$script:gitCommandsWithParamValues = $gitParamValues.Keys -join '|'

try {
    if ($null -ne (git help -a 2>&1 | Select-String flow)) {
        $script:someCommands += 'flow'
    }
}
catch {
    Write-Debug "Search for 'flow' in 'git help' output failed with error: $_"
}

filter quoteStringWithSpecialChars {
    if ($_ -and ($_ -match '\s+|#|@|\$|;|,|''|\{|\}|\(|\)')) {
        $str = $_ -replace "'", "''"
        "'$str'"
    }
    else {
        $_
    }
}

function script:gitCommands($filter, $includeAliases) {
    $cmdList = @()
    if (-not $global:GitTabSettings.AllCommands) {
        $cmdList += $someCommands -like "$filter*"
    }
    else {
        $cmdList += git help --all |
            Where-Object { $_ -match '^ \S.*' } |
            ForEach-Object { $_.Split(' ', [StringSplitOptions]::RemoveEmptyEntries) } |
            Where-Object { $_ -like "$filter*" }
    }

    if ($includeAliases) {
        $cmdList += gitAliases $filter
    }

    $cmdList | Sort-Object
}

function script:gitRemotes($filter) {
    git remote |
        Where-Object { $_ -like "$filter*" } |
        quoteStringWithSpecialChars
}

function script:gitBranches($filter, $includeHEAD = $false, $prefix = '') {
    if ($filter -match "^(?<from>\S*\.{2,3})(?<to>.*)") {
        $prefix += $matches['from']
        $filter = $matches['to']
    }

    $branches = @(git branch --no-color | ForEach-Object { if (($_ -notmatch "^\* \(HEAD detached .+\)$") -and ($_ -match "^\*?\s*(?<ref>.*)")) { $matches['ref'] } }) +
                @(git branch --no-color -r | ForEach-Object { if ($_ -match "^ (?<ref>\S+)(?: -> .+)?") { $matches['ref'] } }) +
                @(if ($includeHEAD) { 'HEAD','FETCH_HEAD','ORIG_HEAD','MERGE_HEAD' })

    $branches |
        Where-Object { $_ -ne '(no branch)' -and $_ -like "$filter*" } |
        ForEach-Object { $prefix + $_ } |
        quoteStringWithSpecialChars
}

function script:gitRemoteUniqueBranches($filter) {
    git branch --no-color -r |
        ForEach-Object { if ($_ -match "^ (?<remote>[^/]+)/(?<branch>\S+)(?! -> .+)?$") { $matches['branch'] } } |
        Group-Object -NoElement |
        Where-Object { $_.Count -eq 1 } |
        Select-Object -ExpandProperty Name |
        Where-Object { $_ -like "$filter*" } |
        quoteStringWithSpecialChars
}

function script:gitTags($filter, $prefix = '') {
    git tag |
        Where-Object { $_ -like "$filter*" } |
        ForEach-Object { $prefix + $_ } |
        quoteStringWithSpecialChars
}

function script:gitFeatures($filter, $command){
    $featurePrefix = git config --local --get "gitflow.prefix.$command"
    $branches = @(git branch --no-color | ForEach-Object { if ($_ -match "^\*?\s*$featurePrefix(?<ref>.*)") { $matches['ref'] } })
    $branches |
        Where-Object { $_ -ne '(no branch)' -and $_ -like "$filter*" } |
        ForEach-Object { $prefix + $_ } |
        quoteStringWithSpecialChars
}

function script:gitRemoteBranches($remote, $ref, $filter, $prefix = '') {
    git branch --no-color -r |
        Where-Object { $_ -like " $remote/$filter*" } |
        ForEach-Object { $prefix + $ref + ($_ -replace " $remote/","") } |
        quoteStringWithSpecialChars
}

function script:gitStashes($filter) {
    (git stash list) -replace ':.*','' |
        Where-Object { $_ -like "$filter*" } |
        quoteStringWithSpecialChars
}

function script:gitTfsShelvesets($filter) {
    (git tfs shelve-list) |
        Where-Object { $_ -like "$filter*" } |
        quoteStringWithSpecialChars
}

function script:gitFiles($filter, $files) {
    $files | Sort-Object |
        Where-Object { $_ -like "$filter*" } |
        quoteStringWithSpecialChars
}

function script:gitIndex($GitStatus, $filter) {
    gitFiles $filter $GitStatus.Index
}

function script:gitAddFiles($GitStatus, $filter) {
    gitFiles $filter (@($GitStatus.Working.Unmerged) + @($GitStatus.Working.Modified) + @($GitStatus.Working.Added))
}

function script:gitCheckoutFiles($GitStatus, $filter) {
    gitFiles $filter (@($GitStatus.Working.Unmerged) + @($GitStatus.Working.Modified) + @($GitStatus.Working.Deleted))
}

function script:gitDiffFiles($GitStatus, $filter, $staged) {
    if ($staged) {
        gitFiles $filter $GitStatus.Index.Modified
    }
    else {
        gitFiles $filter (@($GitStatus.Working.Unmerged) + @($GitStatus.Working.Modified) + @($GitStatus.Index.Modified))
    }
}

function script:gitMergeFiles($GitStatus, $filter) {
    gitFiles $filter $GitStatus.Working.Unmerged
}

function script:gitDeleted($GitStatus, $filter) {
    gitFiles $filter $GitStatus.Working.Deleted
}

function script:gitAliases($filter) {
    git config --get-regexp ^alias\. | ForEach-Object{
        if ($_ -match "^alias\.(?<alias>\S+) .*") {
            $alias = $Matches['alias']
            if ($alias -like "$filter*") {
                $alias
            }
        }
    } | Sort-Object -Unique
}

function script:expandGitAlias($cmd, $rest) {
    $alias = git config "alias.$cmd"
    if ($alias) {
        return "git $alias$rest"
    }
    else {
        return "git $cmd$rest"
    }
}

function script:expandLongParams($cmd, $filter) {
    $longGitParams[$cmd] -split ' ' |
        Where-Object { $_ -like "$filter*" } |
        Sort-Object |
        ForEach-Object { -join ("--", $_) }
}

function script:expandShortParams($cmd, $filter) {
    $shortGitParams[$cmd] -split ' ' |
        Where-Object { $_ -like "$filter*" } |
        Sort-Object |
        ForEach-Object { -join ("-", $_) }
}

function script:expandParamValues($cmd, $param, $filter) {
    $gitParamValues[$cmd][$param] -split ' ' |
        Where-Object { $_ -like "$filter*" } |
        Sort-Object |
        ForEach-Object { -join ("--", $param, "=", $_) }
}

function GitTabExpansion($lastBlock) {
    $res = Invoke-Utf8ConsoleCommand { GitTabExpansionInternal $lastBlock $Global:GitStatus }
    $res
}

function GitTabExpansionInternal($lastBlock, $GitStatus = $null) {
    $ignoreGitParams = '(?<params>\s+-(?:[aA-zZ0-9]+|-[aA-zZ0-9][aA-zZ0-9-]*)(?:=\S+)?)*'

    if ($lastBlock -match "^$(Get-AliasPattern git) (?<cmd>\S+)(?<args> .*)$") {
        $lastBlock = expandGitAlias $Matches['cmd'] $Matches['args']
    }

    # Handles tgit <command> (tortoisegit)
    if ($lastBlock -match "^$(Get-AliasPattern tgit) (?<cmd>\S*)$") {
        # Need return statement to prevent fall-through.
        return $Global:TortoiseGitSettings.TortoiseGitCommands.Keys.GetEnumerator() | Sort-Object | Where-Object { $_ -like "$($matches['cmd'])*" }
    }

    # Handles gitk
    if ($lastBlock -match "^$(Get-AliasPattern gitk).* (?<ref>\S*)$"){
        return gitBranches $matches['ref'] $true
    }

    switch -regex ($lastBlock -replace "^$(Get-AliasPattern git) ","") {

        # Handles git <cmd> <op>
        "^(?<cmd>$($subcommands.Keys -join '|'))\s+(?<op>\S*)$" {
            gitCmdOperations $subcommands $matches['cmd'] $matches['op']
        }

        # Handles git flow <cmd> <op>
        "^flow (?<cmd>$($gitflowsubcommands.Keys -join '|'))\s+(?<op>\S*)$" {
            gitCmdOperations $gitflowsubcommands $matches['cmd'] $matches['op']
        }

        # Handles git flow <command> <op> <name>
        "^flow (?<command>\S*)\s+(?<op>\S*)\s+(?<name>\S*)$" {
            gitFeatures $matches['name'] $matches['command']
        }

        # Handles git remote (rename|rm|set-head|set-branches|set-url|show|prune) <stash>
        "^remote.* (?:rename|rm|set-head|set-branches|set-url|show|prune).* (?<remote>\S*)$" {
            gitRemotes $matches['remote']
        }

        # Handles git stash (show|apply|drop|pop|branch) <stash>
        "^stash (?:show|apply|drop|pop|branch).* (?<stash>\S*)$" {
            gitStashes $matches['stash']
        }

        # Handles git bisect (bad|good|reset|skip) <ref>
        "^bisect (?:bad|good|reset|skip).* (?<ref>\S*)$" {
            gitBranches $matches['ref'] $true
        }

        # Handles git tfs unshelve <shelveset>
        "^tfs +unshelve.* (?<shelveset>\S*)$" {
            gitTfsShelvesets $matches['shelveset']
        }

        # Handles git branch -d|-D|-m|-M <branch name>
        # Handles git branch <branch name> <start-point>
        "^branch.* (?<branch>\S*)$" {
            gitBranches $matches['branch']
        }

        # Handles git <cmd> (commands & aliases)
        "^(?<cmd>\S*)$" {
            gitCommands $matches['cmd'] $TRUE
        }

        # Handles git help <cmd> (commands only)
        "^help (?<cmd>\S*)$" {
            gitCommands $matches['cmd'] $FALSE
        }

        # Handles git push remote <ref>:<branch>
        # Handles git push remote +<ref>:<branch>
        "^push${ignoreGitParams}\s+(?<remote>[^\s-]\S*).*\s+(?<force>\+?)(?<ref>[^\s\:]*\:)(?<branch>\S*)$" {
            gitRemoteBranches $matches['remote'] $matches['ref'] $matches['branch'] -prefix $matches['force']
        }

        # Handles git push remote <ref>
        # Handles git push remote +<ref>
        # Handles git pull remote <ref>
        "^(?:push|pull)${ignoreGitParams}\s+(?<remote>[^\s-]\S*).*\s+(?<force>\+?)(?<ref>[^\s\:]*)$" {
            gitBranches $matches['ref'] -prefix $matches['force']
            gitTags $matches['ref'] -prefix $matches['force']
        }

        # Handles git pull <remote>
        # Handles git push <remote>
        # Handles git fetch <remote>
        "^(?:push|pull|fetch)${ignoreGitParams}\s+(?<remote>\S*)$" {
            gitRemotes $matches['remote']
        }

        # Handles git reset HEAD <path>
        # Handles git reset HEAD -- <path>
        "^reset.* HEAD(?:\s+--)? (?<path>\S*)$" {
            gitIndex $GitStatus $matches['path']
        }

        # Handles git <cmd> <ref>
        "^commit.*-C\s+(?<ref>\S*)$" {
            gitBranches $matches['ref'] $true
        }

        # Handles git add <path>
        "^add.* (?<files>\S*)$" {
            gitAddFiles $GitStatus $matches['files']
        }

        # Handles git checkout -- <path>
        "^checkout.* -- (?<files>\S*)$" {
            gitCheckoutFiles $GitStatus $matches['files']
        }

        # Handles git rm <path>
        "^rm.* (?<index>\S*)$" {
            gitDeleted $GitStatus $matches['index']
        }

        # Handles git diff/difftool <path>
        "^(?:diff|difftool)(?:.* (?<staged>(?:--cached|--staged))|.*) (?<files>\S*)$" {
            gitDiffFiles $GitStatus $matches['files'] $matches['staged']
        }

        # Handles git merge/mergetool <path>
        "^(?:merge|mergetool).* (?<files>\S*)$" {
            gitMergeFiles $GitStatus $matches['files']
        }

        # Handles git checkout <ref>
        "^(?:checkout).* (?<ref>\S*)$" {
            gitBranches $matches['ref'] $true
            gitRemoteUniqueBranches $matches['ref']
            gitTags $matches['ref']
        }

        # Handles git worktree add <path> <ref>
        "^worktree add.* (?<files>\S+) (?<ref>\S*)$" {
            gitBranches $matches['ref']
        }

        # Handles git <cmd> <ref>
        "^(?:cherry|cherry-pick|diff|difftool|log|merge|rebase|reflog\s+show|reset|revert|show).* (?<ref>\S*)$" {
            gitBranches $matches['ref'] $true
            gitTags $matches['ref']
        }

        # Handles git <cmd> --<param>=<value>
        "^(?<cmd>$gitCommandsWithParamValues).* --(?<param>[^=]+)=(?<value>\S*)$" {
            expandParamValues $matches['cmd'] $matches['param'] $matches['value']
        }

        # Handles git <cmd> --<param>
        "^(?<cmd>$gitCommandsWithLongParams).* --(?<param>\S*)$" {
            expandLongParams $matches['cmd'] $matches['param']
        }

        # Handles git <cmd> -<shortparam>
        "^(?<cmd>$gitCommandsWithShortParams).* -(?<shortparam>\S*)$" {
            expandShortParams $matches['cmd'] $matches['shortparam']
        }
    }
}

$PowerTab_RegisterTabExpansion = if (Get-Module -Name powertab) { Get-Command Register-TabExpansion -Module powertab -ErrorAction SilentlyContinue }
if ($PowerTab_RegisterTabExpansion) {
    & $PowerTab_RegisterTabExpansion "git.exe" -Type Command {
        param($Context, [ref]$TabExpansionHasOutput, [ref]$QuoteSpaces)  # 1:

        $line = $Context.Line
        $lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()
        $TabExpansionHasOutput.Value = $true
        GitTabExpansion $lastBlock
    }
    return
}

if (Test-Path Function:\TabExpansion) {
    Rename-Item Function:\TabExpansion TabExpansionBackup
}

function TabExpansion($line, $lastWord) {
    $lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()

    switch -regex ($lastBlock) {
        # Execute git tab completion for all git-related commands
        "^$(Get-AliasPattern git) (.*)" { GitTabExpansion $lastBlock }
        "^$(Get-AliasPattern tgit) (.*)" { GitTabExpansion $lastBlock }
        "^$(Get-AliasPattern gitk) (.*)" { GitTabExpansion $lastBlock }

        # Fall back on existing tab expansion
        default {
            if (Test-Path Function:\TabExpansionBackup) {
                TabExpansionBackup $line $lastWord
            }
        }
    }
}