diff --git a/.gitignore b/.gitignore
index 567609b..c525b60 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 build/
+.task/
diff --git a/Taskfile.yml b/Taskfile.yml
new file mode 100644
index 0000000..47ccef9
--- /dev/null
+++ b/Taskfile.yml
@@ -0,0 +1,37 @@
+# https://taskfile.dev
+
+version: '3'
+
+tasks:
+  fmt:
+    desc: Format go files
+    sources:
+      - "**/*.go"
+    cmds:
+      - go fmt ./...
+  cmd-build:
+    internal: true
+    cmds:
+      - go build -o build/ ./cmd/{{.CMD}}
+  build-convids:
+    desc: Builds the convids command
+    sources:
+      - cmd/convids/**/*.go
+      - convids/**/*.go
+      - internal/cli/*.go
+    generates:
+      - build/convids
+    cmds:
+      - task: cmd-build
+        vars:
+          CMD: convids
+  build-all:
+    desc: Builds all available commands
+    sources:
+      - "**/*.go"
+    generates:
+      - build/convids
+    cmds:
+      - task: cmd-build
+        vars:
+          CMD: "*"
diff --git a/cmd/convids/main.go b/cmd/convids/main.go
index e5f01b4..f07e8db 100644
--- a/cmd/convids/main.go
+++ b/cmd/convids/main.go
@@ -7,7 +7,6 @@ import (
 	"codeberg.org/danjones000/utils/convids"
 	"codeberg.org/danjones000/utils/internal/cli"
 	"github.com/spf13/pflag"
-	"gopkg.in/yaml.v3"
 )
 
 const dataPath = "shows.yml"
@@ -26,17 +25,12 @@ func main() {
 		fmt.Println("looping")
 	}
 
-	f, err := os.Open(dataPath)
+	data, err := convids.NewData(dataPath)
 	cli.HandleErr(err)
 
-	ydec := yaml.NewDecoder(f)
-	var data convids.Data
-	err = ydec.Decode(&data)
-	cli.HandleErr(err)
-
-	fmt.Printf("Data: %+v\n", data)
-
-	for s := range data.AllShows(false) {
-		fmt.Printf("Show: %+v\n", s)
-	}
+	convids.WalkFiles(data, false, false, func(s *convids.Show, path string) error {
+		fmt.Printf("%s for %+v\n", path, s)
+		return nil
+	})
+	fmt.Println("\nDone!")
 }
diff --git a/convids/logic.go b/convids/logic.go
new file mode 100644
index 0000000..35b1497
--- /dev/null
+++ b/convids/logic.go
@@ -0,0 +1,63 @@
+package convids
+
+import (
+	"os"
+	fp "path/filepath"
+	"regexp"
+	"strings"
+
+	"gopkg.in/yaml.v3"
+)
+
+func NewData(path string) (*Data, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	ydec := yaml.NewDecoder(f)
+	var data Data
+	err = ydec.Decode(&data)
+	return &data, err
+}
+
+func ensureExtRe(c *Config) (err error) {
+	if c.extRe != nil {
+		return nil
+	}
+	c.extRe, err = regexp.Compile("(" + strings.Join(c.Extensions, "|") + ")$")
+	return
+}
+
+func WalkFiles(d *Data, stopOnError, silent bool, cb func(s *Show, path string) error) (err error) {
+	err = ensureExtRe(d.Config)
+	if err != nil {
+		return
+	}
+	var files []os.DirEntry
+	files, err = os.ReadDir(d.Config.Source)
+	if err != nil {
+		return
+	}
+	for s := range d.AllShows(silent) {
+		var found bool
+		for _, file := range files {
+			if file.IsDir() {
+				continue
+			}
+			if !d.Config.extRe.MatchString(file.Name()) {
+				continue
+			}
+			found, err = s.Match(file.Name())
+			if err != nil {
+				return
+			}
+			if found {
+				err = cb(s, fp.Join(d.Config.Source, file.Name()))
+				if err != nil && stopOnError {
+					return
+				}
+			}
+		}
+	}
+	return nil
+}
diff --git a/convids/methods.go b/convids/methods.go
index 687d090..71689a9 100644
--- a/convids/methods.go
+++ b/convids/methods.go
@@ -1,22 +1,75 @@
 package convids
 
 import (
+	"errors"
 	"fmt"
 	"iter"
+	"regexp"
 	"slices"
+	"strings"
 )
 
-func (s Shows) All() iter.Seq[Show] {
-	return slices.Values(s)
+var ErrNoName = errors.New("missing name")
+
+var animePattern = `^\[.+\] `
+var animeRegexp = regexp.MustCompile(animePattern)
+
+func (s *Show) Match(path string) (bool, error) {
+	if s.Pattern != "" {
+		return s.matchRegexp(path)
+	}
+	if s.Name == "" {
+		return false, ErrNoName
+	}
+	if s.Anime {
+		if !animeRegexp.MatchString(path) {
+			return false, nil
+		}
+		path = animeRegexp.ReplaceAllString(path, "")
+	}
+	return strings.HasPrefix(path, s.Name), nil
 }
 
-func (d Data) AllShows(silent bool) iter.Seq[Show] {
-	return func(yield func(Show) bool) {
+func (s *Show) matchRegexp(path string) (f bool, err error) {
+	if s.re == nil {
+		p := s.Pattern
+		if s.Anime {
+			if strings.HasPrefix(p, "^") {
+				p = strings.TrimPrefix(p, "^")
+			}
+			p = animePattern + p
+		} else if !strings.HasPrefix(p, "^") {
+			p = "^" + p
+		}
+		s.re, err = regexp.Compile(p)
+		if err != nil {
+			return
+		}
+	}
+	return s.re.MatchString(path), nil
+}
+
+func (ss *Shows) All() iter.Seq[*Show] {
+	return slices.Values(*ss)
+}
+
+func (d *Data) AllShows(silent bool) iter.Seq[*Show] {
+	return func(yield func(*Show) bool) {
+		if d.Config == nil {
+			return
+		}
 		for _, show := range d.Config.Shows {
+			sh := (*d.Shows)[show]
+			if sh == nil || len(*sh) < 1 {
+				continue
+			}
 			if !silent {
 				fmt.Println("\nChecking", show, "shows\n")
 			}
-			for s := range d.Shows[show].All() {
+			for s := range sh.All() {
+				if s == nil {
+					continue
+				}
 				if !yield(s) {
 					return
 				}
diff --git a/convids/models.go b/convids/models.go
index 88ea5f4..1ae6448 100644
--- a/convids/models.go
+++ b/convids/models.go
@@ -1,23 +1,29 @@
 package convids
 
+import "regexp"
+
 type Data struct {
-	Config Config
-	Shows  ShowMap
+	Config *Config
+	Shows  *ShowMap
 }
 
 type Config struct {
 	Source     string
 	Extensions []string
 	Shows      []string
+
+	extRe *regexp.Regexp
 }
 
-type ShowMap map[string]Shows
+type ShowMap map[string]*Shows
 
-type Shows []Show
+type Shows []*Show
 
 type Show struct {
 	Folder  string
 	Pattern string
 	Name    string
 	Anime   bool
+
+	re *regexp.Regexp
 }