GitUtils.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
# Inspired by Mark Embling
# http://www.markembling.info/view/my-ideal-powershell-prompt-with-git-integration

function Get-GitDirectory {
    if ($Env:GIT_DIR) {
        $Env:GIT_DIR
    } else {
        Get-LocalOrParentPath .git
    }
}

function Get-GitBranch($gitDir = $(Get-GitDirectory), [Diagnostics.Stopwatch]$sw) {
    if ($gitDir) {
        dbg 'Finding branch' $sw
        $r = ''; $b = ''; $c = ''
        if (Test-Path $gitDir\rebase-merge\interactive) {
            dbg 'Found rebase-merge\interactive' $sw
            $r = '|REBASE-i'
            $b = "$(Get-Content $gitDir\rebase-merge\head-name)"
        } elseif (Test-Path $gitDir\rebase-merge) {
            dbg 'Found rebase-merge' $sw
            $r = '|REBASE-m'
            $b = "$(Get-Content $gitDir\rebase-merge\head-name)"
        } else {
            if (Test-Path $gitDir\rebase-apply) {
                dbg 'Found rebase-apply' $sw
                if (Test-Path $gitDir\rebase-apply\rebasing) {
                    dbg 'Found rebase-apply\rebasing' $sw
                    $r = '|REBASE'
                } elseif (Test-Path $gitDir\rebase-apply\applying) {
                    dbg 'Found rebase-apply\applying' $sw
                    $r = '|AM'
                } else {
                    dbg 'Found rebase-apply' $sw
                    $r = '|AM/REBASE'
                }
            } elseif (Test-Path $gitDir\MERGE_HEAD) {
                dbg 'Found MERGE_HEAD' $sw
                $r = '|MERGING'
            } elseif (Test-Path $gitDir\CHERRY_PICK_HEAD) {
                dbg 'Found CHERRY_PICK_HEAD' $sw
                $r = '|CHERRY-PICKING'
            } elseif (Test-Path $gitDir\BISECT_LOG) {
                dbg 'Found BISECT_LOG' $sw
                $r = '|BISECTING'
            }

            $b = Invoke-NullCoalescing `
                { dbg 'Trying symbolic-ref' $sw; git symbolic-ref HEAD 2>$null } `
                { '({0})' -f (Invoke-NullCoalescing `
                    {
                        dbg 'Trying describe' $sw
                        switch ($Global:GitPromptSettings.DescribeStyle) {
                            'contains' { git describe --contains HEAD 2>$null }
                            'branch' { git describe --contains --all HEAD 2>$null }
                            'describe' { git describe HEAD 2>$null }
                            default { git describe --tags --exact-match HEAD 2>$null }
                        }
                    } `
                    {
                        dbg 'Falling back on parsing HEAD' $sw
                        $ref = $null

                        if (Test-Path $gitDir\HEAD) {
                            dbg 'Reading from .git\HEAD' $sw
                            $ref = Get-Content $gitDir\HEAD 2>$null
                        } else {
                            dbg 'Trying rev-parse' $sw
                            $ref = git rev-parse HEAD 2>$null
                        }

                        if ($ref -match 'ref: (?<ref>.+)') {
                            return $Matches['ref']
                        } elseif ($ref -and $ref.Length -ge 7) {
                            return $ref.Substring(0,7)+'...'
                        } else {
                            return 'unknown'
                        }
                    }
                ) }
        }

        dbg 'Inside git directory?' $sw
        if ('true' -eq $(git rev-parse --is-inside-git-dir 2>$null)) {
            dbg 'Inside git directory' $sw
            if ('true' -eq $(git rev-parse --is-bare-repository 2>$null)) {
                $c = 'BARE:'
            } else {
                $b = 'GIT_DIR!'
            }
        }

        "$c$($b -replace 'refs/heads/','')$r"
    }
}

function Get-GitStatus($gitDir = (Get-GitDirectory)) {
    $settings = $Global:GitPromptSettings
    $enabled = (-not $settings) -or $settings.EnablePromptStatus
    if ($enabled -and $gitDir)
    {
        if($settings.Debug) {
            $sw = [Diagnostics.Stopwatch]::StartNew(); Write-Host ''
        } else {
            $sw = $null
        }
        $branch = $null
        $aheadBy = 0
        $behindBy = 0
        $indexAdded = @()
        $indexModified = @()
        $indexDeleted = @()
        $indexUnmerged = @()
        $filesAdded = @()
        $filesModified = @()
        $filesDeleted = @()
        $filesUnmerged = @()
        $stashCount = 0

        if($settings.EnableFileStatus -and !$(InDisabledRepository)) {
            dbg 'Getting status' $sw
            $status = git -c color.status=false status --short --branch 2>$null
            if($settings.EnableStashStatus) {
                dbg 'Getting stash count' $sw
                $stashCount = $null | git stash list 2>$null | measure-object | select -expand Count
            }
        } else {
            $status = @()
        }

        dbg 'Parsing status' $sw
        $status | foreach {
            dbg "Status: $_" $sw
            if($_) {
                switch -regex ($_) {
                    '^(?<index>[^#])(?<working>.) (?<path1>.*?)(?: -> (?<path2>.*))?$' {
                        switch ($matches['index']) {
                            'A' { $indexAdded += $matches['path1'] }
                            'M' { $indexModified += $matches['path1'] }
                            'R' { $indexModified += $matches['path1'] }
                            'C' { $indexModified += $matches['path1'] }
                            'D' { $indexDeleted += $matches['path1'] }
                            'U' { $indexUnmerged += $matches['path1'] }
                        }
                        switch ($matches['working']) {
                            '?' { $filesAdded += $matches['path1'] }
                            'A' { $filesAdded += $matches['path1'] }
                            'M' { $filesModified += $matches['path1'] }
                            'D' { $filesDeleted += $matches['path1'] }
                            'U' { $filesUnmerged += $matches['path1'] }
                        }
                    }

                    '^## (?<branch>\S+?)(?:\.\.\.(?<upstream>\S+))?(?: \[(?:ahead (?<ahead>\d+))?(?:, )?(?:behind (?<behind>\d+))?\])?$' {
                        $branch = $matches['branch']
                        $upstream = $matches['upstream']
                        $aheadBy = [int]$matches['ahead']
                        $behindBy = [int]$matches['behind']
                    }

                    '^## Initial commit on (?<branch>\S+)$' {
                        $branch = $matches['branch']
                    }
                }
            }
        }

        if(!$branch) { $branch = Get-GitBranch $gitDir $sw }
        dbg 'Building status object' $sw
        $indexPaths = $indexAdded + $indexModified + $indexDeleted + $indexUnmerged
        $workingPaths = $filesAdded + $filesModified + $filesDeleted + $filesUnmerged
        $index = New-Object PSObject @(,@($indexPaths | ?{ $_ } | Select -Unique)) |
            Add-Member -PassThru NoteProperty Added    $indexAdded |
            Add-Member -PassThru NoteProperty Modified $indexModified |
            Add-Member -PassThru NoteProperty Deleted  $indexDeleted |
            Add-Member -PassThru NoteProperty Unmerged $indexUnmerged
        $working = New-Object PSObject @(,@($workingPaths | ?{ $_ } | Select -Unique)) |
            Add-Member -PassThru NoteProperty Added    $filesAdded |
            Add-Member -PassThru NoteProperty Modified $filesModified |
            Add-Member -PassThru NoteProperty Deleted  $filesDeleted |
            Add-Member -PassThru NoteProperty Unmerged $filesUnmerged

        $result = New-Object PSObject -Property @{
            GitDir          = $gitDir
            Branch          = $branch
            AheadBy         = $aheadBy
            BehindBy        = $behindBy
            Upstream        = $upstream
            HasIndex        = [bool]$index
            Index           = $index
            HasWorking      = [bool]$working
            Working         = $working
            HasUntracked    = [bool]$filesAdded
            StashCount      = $stashCount
        }

        dbg 'Finished' $sw
        if($sw) { $sw.Stop() }
        return $result
    }
}

function InDisabledRepository {
    $currentLocation = Get-Location

    foreach ($repo in $Global:GitPromptSettings.RepositoriesInWhichToDisableFileStatus)
    {
        if ($currentLocation -like "$repo*") {
            return $true
        }
    }

    return $false
}

function Enable-GitColors {
    Write-Warning 'Enable-GitColors is Obsolete and will be removed in a future version of posh-git.'
}

function Get-AliasPattern($exe) {
   $aliases = @($exe) + @(Get-Alias | where { $_.Definition -eq $exe } | select -Exp Name)
   "($($aliases -join '|'))"
}

function setenv($key, $value) {
    [void][Environment]::SetEnvironmentVariable($key, $value, [EnvironmentVariableTarget]::Process)
    Set-TempEnv $key $value
}

function Get-TempEnv($key) {
    $path = Join-Path ($Env:TEMP) ".ssh\$key.env"
    if (Test-Path $path) {
        $value =  Get-Content $path
        [void][Environment]::SetEnvironmentVariable($key, $value, [EnvironmentVariableTarget]::Process)
    }
}

function Set-TempEnv($key, $value) {
    $path = Join-Path ($Env:TEMP) ".ssh\$key.env"
    if ($value -eq $null) {
        if (Test-Path $path) {
            Remove-Item $path
        }
    } else {
        New-Item $path -Force -ItemType File > $null
        $value | Out-File -FilePath $path -Encoding ascii -Force
    }
}

# Retrieve the current SSH agent PID (or zero). Can be used to determine if there
# is a running agent.
function Get-SshAgent() {
    if ($env:GIT_SSH -imatch 'plink') {
        $pageantPid = Get-Process | Where-Object { $_.Name -eq 'pageant' } | Select -ExpandProperty Id -First 1
        if ($null -ne $pageantPid) { return $pageantPid }
    } else {
        $agentPid = $Env:SSH_AGENT_PID
        if ($agentPid) {
            $sshAgentProcess = Get-Process | Where-Object { $_.Id -eq $agentPid -and $_.Name -eq 'ssh-agent' }
            if ($null -ne $sshAgentProcess) {
                return $agentPid
            } else {
                setenv 'SSH_AGENT_PID', $null
                setenv 'SSH_AUTH_SOCK', $null
            }
        }
    }

    return 0
}

# Attempt to guess Pageant's location
function Find-Pageant() {
    Write-Verbose "Pageant not in path. Trying to guess location."
    $gitSsh = $env:GIT_SSH
    if ($gitSsh -and (test-path $gitSsh)) {
        $pageant = join-path (split-path $gitSsh) pageant
    }
    if (!(get-command $pageant -Erroraction SilentlyContinue)) { return }     # Guessing failed.
    else { return $pageant }
}

# Attempt to guess $program's location. For ssh-agent/ssh-add.
function Find-Ssh($program = 'ssh-agent') {
    Write-Verbose "$program not in path. Trying to guess location."
    $gitItem = Get-Command git -Erroraction SilentlyContinue | Get-Item
    if ($gitItem -eq $null) { Write-Warning 'git not in path'; return }

    $sshLocation = join-path $gitItem.directory.parent.fullname bin/$program
    if (get-command $sshLocation -Erroraction SilentlyContinue) { return $sshLocation }

    $sshLocation = join-path $gitItem.directory.parent.fullname usr/bin/$program
    if (get-command $sshLocation -Erroraction SilentlyContinue) { return $sshLocation }
}

# Loosely based on bash script from http://help.github.com/ssh-key-passphrases/
function Start-SshAgent([switch]$Quiet) {
    [int]$agentPid = Get-SshAgent
    if ($agentPid -gt 0) {
        if (!$Quiet) {
            $agentName = Get-Process -Id $agentPid | Select -ExpandProperty Name
            if (!$agentName) { $agentName = "SSH Agent" }
            Write-Host "$agentName is already running (pid $($agentPid))"
        }
        return
    }

    if ($env:GIT_SSH -imatch 'plink') {
        Write-Host "GIT_SSH set to $($env:GIT_SSH), using Pageant as SSH agent."
        $pageant = Get-Command pageant -TotalCount 1 -Erroraction SilentlyContinue
        $pageant = if ($pageant) {$pageant} else {Find-Pageant}
        if (!$pageant) { Write-Warning "Could not find Pageant."; return }
        Start-Process -NoNewWindow $pageant
    } else {
        $sshAgent = Get-Command ssh-agent -TotalCount 1 -ErrorAction SilentlyContinue
        $sshAgent = if ($sshAgent) {$sshAgent} else {Find-Ssh('ssh-agent')}
        if (!$sshAgent) { Write-Warning 'Could not find ssh-agent'; return }

        & $sshAgent | foreach {
            if($_ -match '(?<key>[^=]+)=(?<value>[^;]+);') {
                setenv $Matches['key'] $Matches['value']
            }
        }
    }
    Add-SshKey
}

function Get-SshPath($File = 'id_rsa')
{
    $home = Resolve-Path (Invoke-NullCoalescing $Env:HOME ~)
    Resolve-Path (Join-Path $home ".ssh\$File") -ErrorAction SilentlyContinue 2> $null
}

# Add a key to the SSH agent
function Add-SshKey() {
    if ($env:GIT_SSH -imatch 'plink') {
        $pageant = Get-Command pageant -Erroraction SilentlyContinue | Select -First 1 -ExpandProperty Name
        $pageant = if ($pageant) {$pageant} else {Find-Pageant}
        if (!$pageant) { Write-Warning 'Could not find Pageant'; return }

        if ($args.Count -eq 0) {
            $keystring = ""
            $keyPath = Join-Path $Env:HOME ".ssh"
            $keys = Get-ChildItem $keyPath/"*.ppk" | Select -ExpandProperty Name
            foreach ( $key in $keys ) { $keystring += "`"$keyPath\$key`" " }
            if ( $keystring ) { & $pageant "$keystring" }
        } else {
            foreach ($value in $args) {
                & $pageant $value
            }
        }
    } else {
        $sshAdd = Get-Command ssh-add -TotalCount 1 -ErrorAction SilentlyContinue
        $sshAdd = if ($sshAdd) {$sshAdd} else {Find-Ssh('ssh-add')}
        if (!$sshAdd) { Write-Warning 'Could not find ssh-add'; return }

        if ($args.Count -eq 0) {
            & $sshAdd
        } else {
            foreach ($value in $args) {
                & $sshAdd $value
            }
        }
    }
}

# Stop a running SSH agent
function Stop-SshAgent() {
    [int]$agentPid = Get-SshAgent
    if ($agentPid -gt 0) {
        # Stop agent process
        $proc = Get-Process -Id $agentPid -ErrorAction SilentlyContinue
        if ($proc -ne $null) {
            Stop-Process $agentPid
        }

        setenv 'SSH_AGENT_PID', $null
        setenv 'SSH_AUTH_SOCK', $null
    }
}

function Update-AllBranches($Upstream = 'master', [switch]$Quiet) {
    $head = git rev-parse --abbrev-ref HEAD
    git checkout -q $Upstream
    $branches = (git branch --no-color --no-merged) | where { $_ -notmatch '^\* ' }
    foreach ($line in $branches) {
        $branch = $line.SubString(2)
        if (!$Quiet) { Write-Host "Rebasing $branch onto $Upstream..." }
        git rebase -q $Upstream $branch > $null 2> $null
        if ($LASTEXITCODE) {
            git rebase --abort
            Write-Warning "Rebase failed for $branch"
        }
    }
    git checkout -q $head
}