Invoke-GitDescribe.ps1
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# https://git-scm.com/docs/git-describe # .SYNOPSIS # Give an object a human readable name based on an available ref. # .DESCRIPTION # The command finds the most recent tag that is reachable from a commit. If the tag points to the # commit, then only the tag is shown. Otherwise, it suffixes the tag name with the number of # additional commits on top of the tagged object and the abbreviated object name of the most recent # commit. The result is a "human-readable" object name which can also be used to identify the # commit to other git commands. # By default (without `-All` or `-Tags`) `Invoke-GitDescribe` only shows annotated tags. function Invoke-GitDescribe { [CmdletBinding(DefaultParameterSetName = "Commitish")] [OutputType([hashtable])] param ( # Commit-ish object names to describe. Defaults to `HEAD` if omitted. [Parameter(Mandatory, Position = 0, ParameterSetName = "Commitish")] [string]$Commitish, # Describe the state of the working tree. When the working tree matches `HEAD`, the output # is the same as `Invoke-GitDescribe HEAD`. If the working tree has local modification # `--dirty` is appended to it. If a repository is corrupt and Git cannot determine if there # is a local modification, Git will error out. [Parameter(Mandatory, ParameterSetName = "Dirty")] [ValidateScript({ ($_ -is [bool] -and $_ -eq $true) -or $_ -is [string] })] [object]$Dirty, # Describe the state of the working tree. When the working tree matches `HEAD`, the output # is the same as `Invoke-GitDescribe HEAD`. If the working tree has local modification # `--dirty` is appended to it. If a repository is corrupt and Git cannot determine if there # is a local modification, Git will append the suffix `--broken` instead. [Parameter(Mandatory, ParameterSetName = "Broken")] [ValidateScript({ ($_ -is [bool] -and $_ -eq $true) -or $_ -is [string] })] [object]$Broken, # If the given object refers to a blob, it will be described as <commit-ish>:<path>, such # that the blob can be found at <path> in the <commit-ish>, which itself describes the # first commit in which this blob occurs in a reverse revision walk from `HEAD`. [Parameter(Mandatory, Position = 0, ParameterSetName = "Blob")] [string]$Blob, # Instead of using only the annotated tags, use any ref found in `refs/` namespace. This # option enables matching any known branch, remote-tracking branch, or lightweight tag. [Parameter(ParameterSetName = "Commitish")] [Parameter(ParameterSetName = "Dirty")] [Parameter(ParameterSetName = "Broken")] [switch]$All, # Instead of using only the annotated tags, use any tag found in `refs/tags` namespace. # This option enables matching a lightweight (non-annotated) tag. [Parameter(ParameterSetName = "Commitish")] [Parameter(ParameterSetName = "Dirty")] [Parameter(ParameterSetName = "Broken")] [switch]$Tags, # Instead of finding the tag that predates the commit, find the tag that comes after the # commit, and thus contains it. Automatically implies `-Tags`. [Parameter(ParameterSetName = "Commitish")] [Parameter(ParameterSetName = "Dirty")] [Parameter(ParameterSetName = "Broken")] [switch]$Contains, # Instead of using the default number of hexadecimal digits (which will vary according to # the number of objects in the repository with a default of 7) of the abbreviated object # name, use <n> digits, or as many digits as needed to form a unique object name. An <n> # of 0 will suppress long format, only showing the closest tag. [Parameter(ParameterSetName = "Commitish")] [Parameter(ParameterSetName = "Dirty")] [Parameter(ParameterSetName = "Broken")] [Nullable[int]]$Abbrev, # Instead of considering only the 10 most recent tags as candidates to describe the input # commit-ish consider up to <n> candidates. Increasing <n> above 10 will take slightly # longer but may produce a more accurate result. An <n> of 0 will cause only exact matches # to be output. [Parameter()] [Nullable[int]]$Candidates, # Only output exact matches (a tag directly references the supplied commit). This is a # synonym for `-Candidates 0`. [Parameter()] [switch]$ExactMatch, # Verbosely display information about the searching strategy being employed to standard # error. The tag name will still be printed to standard out. [Parameter()] [switch]$XDebug, # Always output the long format (the tag, the number of commits and the abbreviated commit # name) even when it matches a tag. This is useful when you want to see parts of the commit # object name in `Invoke-GitDescribe` output, even when the commit in question happens to # be a tagged version. Instead of just emitting the tag name, it will describe such a # commit as v1.2-0-gdeadbee (0th commit since tag v1.2 that points at object deadbee). [Parameter()] [switch]$Long, # Only consider tags matching the given `glob(7)` pattern, excluding the "refs/tags/" # prefix. If used with `-All`, it also considers local branches and remote-tracking # references matching the pattern, excluding respectively "refs/heads/" and "refs/remotes/" # prefix; references of other types are never considered. If given multiple times, a list # of patterns will be accumulated, and tags matching any of the patterns will be # considered. Use `-NoMatch` to clear and reset the list of patterns. [Parameter()] [string]$Match, # Do not consider tags matching the given `glob(7)` pattern, excluding the "refs/tags/" # prefix. If used with `-All`, it also does not consider local branches and remote-tracking # references matching the pattern, excluding respectively "refs/heads/" and "refs/remotes/" # prefix; references of other types are never considered. If given multiple times, a list # of patterns will be accumulated and tags matching any of the patterns will be excluded. # When combined with `-Match` a tag will be considered when it matches at least one # -Match` pattern and does not match any of the `-Exclude` patterns. Use `--no-exclude` to # clear and reset the list of patterns. [Parameter()] [string]$Exclude, # Show uniquely abbreviated commit object as fallback. [Parameter()] [switch]$Always, # Follow only the first parent commit upon seeing a merge commit. This is useful when you # wish to not match tags on branches merged in the history of the target commit. [Parameter()] [switch]$FirstParent ) $Arguments = @() if ($Commitish) { $Arguments += $Commitish } elseif ($null -ne $Dirty) { if ($Dirty -is [string]) { $Arguments += "--dirty=$Dirty" } else { $Arguments += "--dirty" } } elseif ($null -ne $Broken) { if ($Broken -is [string]) { $Arguments += "--broken=$Broken" } else { $Arguments += "--broken" } } else { $Arguments += $Blob } if ($All) { $Arguments += "--all" } if ($Tags) { $Arguments += "--tags" } if ($Contains) { $Arguments += "--contains" } if ($null -ne $Abbrev) { $Arguments += "--abbrev=$Abbrev" } if ($null -ne $Candidates) { $Arguments += "--candidates=$Candidates" } if ($ExactMatch) { $Arguments += "--exact-match" } if ($XDebug) { $Arguments += "--debug" } if ($Long) { $Arguments += "--long" } if ($Match) { $Arguments += "--match",$Match } if ($Exclude) { $Arguments += "--exclude",$Exclude } if ($Always) { $Arguments += "--always" } if ($FirstParent) { $Arguments += "--first-parent" } Invoke-Git "describe" @Arguments } |