chore: import upstream snapshot with attribution

internal/parser/languages/powershell.go

@@ -0,0 +1,95 @@
+package languages
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/zzet/gortex/internal/graph"
+	"github.com/zzet/gortex/internal/parser"
+)
+
+// PowerShell. Shapes we capture: `function Verb-Noun` and `filter`
+// definitions, `class` declarations (PS 5.0+), `Import-Module` and
+// dot-source statements. Verb-noun pairs may contain dashes — the name
+// regex uses `[\w-]+`.
+var (
+	psFunctionRe  = regexp.MustCompile(`(?im)^\s*(?:function|filter)\s+(?:(?:global|local|script|private):)?([\w-]+)`)
+	psClassRe     = regexp.MustCompile(`(?im)^\s*class\s+(\w+)`)
+	psImportRe    = regexp.MustCompile(`(?im)^\s*Import-Module\s+(?:-Name\s+)?['"]?([\w./\\-]+)['"]?`)
+	psDotSourceRe = regexp.MustCompile(`(?im)^\s*\.\s+['"]?([\w./\\-]+\.ps[md]?1)['"]?`)
+)
+
+// PowerShellExtractor extracts PowerShell source using regex.
+type PowerShellExtractor struct{}
+
+func NewPowerShellExtractor() *PowerShellExtractor { return &PowerShellExtractor{} }
+
+func (e *PowerShellExtractor) Language() string { return "powershell" }
+func (e *PowerShellExtractor) Extensions() []string {
+	return []string{".ps1", ".psm1", ".psd1"}
+}
+
+func (e *PowerShellExtractor) Extract(filePath string, src []byte) (*parser.ExtractionResult, error) {
+	lines := strings.Split(string(src), "\n")
+	result := &parser.ExtractionResult{}
+
+	fileNode := &graph.Node{
+		ID: filePath, Kind: graph.KindFile, Name: filePath,
+		FilePath: filePath, StartLine: 1, EndLine: len(lines),
+		Language: "powershell",
+	}
+	result.Nodes = append(result.Nodes, fileNode)
+
+	seen := make(map[string]bool)
+	add := func(name string, kind graph.NodeKind, start, end int) {
+		if name == "" {
+			return
+		}
+		id := filePath + "::" + name
+		if seen[id] {
+			return
+		}
+		seen[id] = true
+		result.Nodes = append(result.Nodes, &graph.Node{
+			ID: id, Kind: kind, Name: name,
+			FilePath: filePath, StartLine: start, EndLine: end,
+			Language: "powershell",
+		})
+		result.Edges = append(result.Edges, &graph.Edge{
+			From: fileNode.ID, To: id, Kind: graph.EdgeDefines,
+			FilePath: filePath, Line: start,
+		})
+	}
+
+	for _, m := range psClassRe.FindAllSubmatchIndex(src, -1) {
+		name := string(src[m[2]:m[3]])
+		line := lineAt(src, m[0])
+		add(name, graph.KindType, line, findBlockEnd(lines, line))
+	}
+	for _, m := range psFunctionRe.FindAllSubmatchIndex(src, -1) {
+		name := string(src[m[2]:m[3]])
+		line := lineAt(src, m[0])
+		add(name, graph.KindFunction, line, findBlockEnd(lines, line))
+	}
+
+	for _, m := range psImportRe.FindAllSubmatchIndex(src, -1) {
+		mod := string(src[m[2]:m[3]])
+		line := lineAt(src, m[0])
+		result.Edges = append(result.Edges, &graph.Edge{
+			From: fileNode.ID, To: "unresolved::import::" + mod,
+			Kind: graph.EdgeImports, FilePath: filePath, Line: line,
+		})
+	}
+	for _, m := range psDotSourceRe.FindAllSubmatchIndex(src, -1) {
+		path := string(src[m[2]:m[3]])
+		line := lineAt(src, m[0])
+		result.Edges = append(result.Edges, &graph.Edge{
+			From: fileNode.ID, To: "unresolved::import::" + path,
+			Kind: graph.EdgeImports, FilePath: filePath, Line: line,
+		})
+	}
+
+	return result, nil
+}
+
+var _ parser.Extractor = (*PowerShellExtractor)(nil)