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#Region "Microsoft.VisualBasic::a93697598f6f25ce85f4637f01afaf25, Microsoft.VisualBasic.Core\Language\Language\UnixBash\Shell\ls.vb"
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#End Region
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Imports System.Runtime.CompilerServices
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Imports System.Text.RegularExpressions
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Imports Microsoft.VisualBasic.FileIO
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Imports Microsoft.VisualBasic.Linq
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Imports Microsoft.VisualBasic.Serialization.JSON
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Imports Microsoft.VisualBasic.Text.Patterns
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Imports SearchOptions = System.Int32
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Namespace Language.UnixBash
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Public Class Search : Implements ICloneable
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Dim __opts As New Dictionary(Of SearchOpt.Options, SearchOpt)
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Public Overrides Function ToString() As String
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Return __opts.GetJson
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function Clone() As Object Implements ICloneable.Clone
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Return New Search With {
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.__opts = New Dictionary(Of SearchOpt.Options, SearchOpt)(__opts)
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}
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End Function
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Public Shared Operator -(ls As Search, l As SearchOpt) As Search
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If l.opt <> SearchOpt.Options.None Then
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Dim clone As Search = DirectCast(ls.Clone, Search)
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Call clone.__opts.Add(l.opt, l)
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Return clone
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Else
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Return ls
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End If
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End Operator
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Public Shared Operator <<(ls As Search, opt As SearchOptions) As Search
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If CType(opt, SearchOption) = SearchOption.SearchAllSubDirectories Then
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ls.__opts.Add(SearchOpt.Options.Recursive, r)
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End If
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Return ls
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End Operator
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Shared Operator -(ls As Search, wildcards$()) As Search
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Return ls - ShellSyntax.wildcards(wildcards$)
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End Operator
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Add wildcard pattern for path match
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Shared Operator -(ls As Search, wildcards$) As Search
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Return ls - wildcards.Split(","c)
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End Operator
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Public ReadOnly Property SearchType As FileIO.SearchOption
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Get
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Dim opt As FileIO.SearchOption = FileIO.SearchOption.SearchTopLevelOnly
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If __opts.ContainsKey(SearchOpt.Options.Recursive) Then
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Return FileIO.SearchOption.SearchAllSubDirectories
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Else
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Return opt
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End If
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End Get
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End Property
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Public ReadOnly Property wildcards As String()
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Get
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If Not __opts.ContainsKey(SearchOpt.Options.Ext) Then
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Return Nothing
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Else
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Return __opts(SearchOpt.Options.Ext) _
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.wildcards _
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.ToArray
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End If
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End Get
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End Property
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Search the files in the specific directory
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<param name="DIR"></param>
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Shared Operator <(ls As Search, DIR As String) As IEnumerable(Of String)
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Return ls <= DIR
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End Operator
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Overloads Shared Operator <=(ls As Search, directories As IEnumerable(Of String)) As IEnumerable(Of String)
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Return directories _
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.SafeQuery _
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.Select(Function(dir) ls <= dir) _
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.IteratesALL
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End Operator
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Search the files in the specific directory
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<param name="directory"></param>
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Public Overloads Shared Operator <=(ls As Search, directory$) As IEnumerable(Of String)
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Dim l As Boolean = ls.__opts.ContainsKey(SearchOpt.Options.LongName)
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If Not directory.DirectoryExists Then
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Call $"Directory {directory} is not valid on your file system!".Warning
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Return {}
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End If
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Dim wc$() = ls.wildcards
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Dim isMatch As Func(Of String, Boolean) =
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AddressOf New wildcardsCompatible With {
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.regexp = If(wc.IsNullOrEmpty, {"*"}, wc)
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}.IsMatch
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Dim list As IEnumerable(Of String)
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With ls
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If .__opts.ContainsKey(SearchOpt.Options.Directory) Then
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list = directory.ListDirectory(.SearchType)
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Else
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list = directory.ReadDirectory(.SearchType)
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End If
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If .__opts.ContainsKey(SearchOpt.Options.Directory) Then
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If l Then
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Return list.Where(isMatch)
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Else
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Return list.Where(isMatch) _
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.Select(Function(s)
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Return s.BaseName
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End Function)
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End If
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Else
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If l Then
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Return list.Where(isMatch)
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Else
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Return From path As String
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In list
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Where isMatch(path)
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Let name As String = path.Replace("\", "/") _
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.Split("/"c) _
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.Last
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Select name
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End If
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End If
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End With
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End Operator
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Public Shared Operator >(ls As Search, DIR As String) As IEnumerable(Of String)
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Throw New NotSupportedException
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End Operator
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Public Shared Operator >=(ls As Search, DIR As String) As IEnumerable(Of String)
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Throw New NotSupportedException
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End Operator
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Public Shared Operator >=(ls As Search, dirs As IEnumerable(Of String)) As IEnumerable(Of String)
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Throw New NotSupportedException
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End Operator
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End Class
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Using regular expression to find a match on the file name.
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Public Structure wildcardsCompatible
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Dim regexp As String()
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Using the regexp engine instead of the wildcard match engine?
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Dim usingRegexp As Boolean
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Windows系统上面文件路径不区分大小写,但是Linux、Mac系统却区分大小写
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所以使用这个来保持对Windows文件系统的兼容性
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Shared ReadOnly opt As RegexOptions =
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If(App.Platform = PlatformID.MacOSX OrElse
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App.Platform = PlatformID.Unix,
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RegexOptions.Singleline, RegexICSng)
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Shared ReadOnly pathIgnoreCase As Boolean = App.IsMicrosoftPlatform
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Linux/Mac系统不支持Windows系统的通配符,所以在这里是用正则表达式来保持代码的兼容性
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<param name="path"></param>
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Public Function IsMatch(path As String) As Boolean
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If regexp.IsNullOrEmpty Then
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Return True
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End If
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Dim name As String = path.Replace("\", "/").Split("/"c).Last
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If usingRegexp Then
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For Each r As String In regexp
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If Regex.Match(name, r, opt).Success Then
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Return True
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End If
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Next
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Else
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For Each r As String In regexp
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If WildcardsExtension.WildcardMatch(r, name, pathIgnoreCase) Then
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Return True
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End If
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Next
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End If
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Return False
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End Function
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End Structure
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Public Structure SearchOpt
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Dim opt As Options
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Dim value As String
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Dim wildcards As List(Of String)
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Sub New(opt As Options, s As String)
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Me.opt = opt
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Me.value = s
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Me.wildcards = New List(Of String)
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End Sub
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Sub New(opt As Options)
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Call Me.New(opt, "")
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End Sub
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Public Overrides Function ToString() As String
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Return Me.GetJson
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End Function
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Public Enum Options
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None
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Ext
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LongName
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List directories, not files listing.
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Directory
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递归搜索所有的文件夹
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Recursive
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End Enum
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End Structure
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End Namespace
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