Remove Starlark, for now

This is temporary as we prepare for a stable v2 release. We don't want
to make promises we don't know we can keep, and the Starlark integration
deserves much more focused attention which resources and funding do not
currently permit. When the project is financially stable, I will be able
to revisit this properly and add flexible, robust Starlark scripting
support to Caddy 2.

4 files changed, 0 insertions, 351 deletions

diff --git a/pkg/caddyscript/lib/http.go b/pkg/caddyscript/lib/http.go
deleted file mode 100644
index 5e47d94..0000000
--- a/pkg/caddyscript/lib/http.go
+++ /dev/null
@@ -1,111 +0,0 @@
-// Copyright 2015 Matthew Holt and The Caddy Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package caddyscript
-
-import (
-	"fmt"
-	"net/http"
-
-	"github.com/starlight-go/starlight/convert"
-	"go.starlark.net/starlark"
-)
-
-// HTTPRequest represents an http request type in caddyscript.
-type HTTPRequest struct{ Req *http.Request }
-
-// AttrNames defines what properties and methods are available on the HTTPRequest type.
-func (r HTTPRequest) AttrNames() []string {
-	return []string{"header", "query", "url", "method", "host", "tls", "redirect"}
-}
-
-func (r HTTPRequest) Freeze()               {}
-func (r HTTPRequest) Hash() (uint32, error) { return 0, fmt.Errorf("unhashable: HTTPRequest") }
-func (r HTTPRequest) String() string        { return fmt.Sprint(r.Req) }
-func (r HTTPRequest) Type() string          { return "HTTPRequest" }
-func (r HTTPRequest) Truth() starlark.Bool  { return true }
-
-// Header handles returning a header key.
-func (r HTTPRequest) Header(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var key string
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 1, &key)
-	if err != nil {
-		return starlark.None, fmt.Errorf("get request header: %v", err.Error())
-	}
-
-	return starlark.String(r.Req.Header.Get(key)), nil
-}
-
-// Redirect handles an http redirect from starlark code.
-func (r HTTPRequest) Redirect(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var w starlark.Value
-	var req HTTPRequest
-	var newURL string
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 3, &w, &req, &newURL)
-	if err != nil {
-		return starlark.None, fmt.Errorf("unpacking arguments: %v", err.Error())
-	}
-
-	writer := convert.FromValue(w)
-	if w, ok := writer.(http.ResponseWriter); ok {
-		http.Redirect(w, req.Req, newURL, http.StatusSeeOther)
-		return starlark.None, nil
-	}
-
-	return starlark.None, fmt.Errorf("first provided argument is not http.ResponseWriter")
-}
-
-// Attr defines what happens when props or methods are called on the HTTPRequest type.
-func (r HTTPRequest) Attr(name string) (starlark.Value, error) {
-	switch name {
-	case "redirect":
-		b := starlark.NewBuiltin("Redirect", r.Redirect)
-		b = b.BindReceiver(r)
-
-		return b, nil
-	case "tls":
-		tls := new(starlark.Dict)
-		tls.SetKey(starlark.String("cipher_suite"), starlark.MakeUint(uint(r.Req.TLS.CipherSuite)))
-		tls.SetKey(starlark.String("did_resume"), starlark.Bool(r.Req.TLS.DidResume))
-		tls.SetKey(starlark.String("handshake_complete"), starlark.Bool(r.Req.TLS.HandshakeComplete))
-		tls.SetKey(starlark.String("negotiated_protocol"), starlark.String(r.Req.TLS.NegotiatedProtocol))
-		tls.SetKey(starlark.String("negotiated_protocol_is_mutual"), starlark.Bool(r.Req.TLS.NegotiatedProtocolIsMutual))
-		tls.SetKey(starlark.String("server_name"), starlark.String(r.Req.TLS.ServerName))
-		tls.SetKey(starlark.String("version"), starlark.String(r.Req.TLS.Version))
-
-		return tls, nil
-	case "header":
-		b := starlark.NewBuiltin("Header", r.Header)
-		b = b.BindReceiver(r)
-
-		return b, nil
-	case "query":
-		qVals := r.Req.URL.Query()
-		query := starlark.NewDict(len(qVals))
-
-		for k, v := range qVals {
-			query.SetKey(starlark.String(k), starlark.String(v[0]))
-		}
-
-		return query, nil
-	case "url":
-		return starlark.String(r.Req.URL.Path), nil
-	case "method":
-		return starlark.String(r.Req.Method), nil
-	case "host":
-		return starlark.String(r.Req.Host), nil
-	}
-
-	return nil, nil
-}
diff --git a/pkg/caddyscript/lib/regex.go b/pkg/caddyscript/lib/regex.go
deleted file mode 100644
index cc69a36..0000000
--- a/pkg/caddyscript/lib/regex.go
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2015 Matthew Holt and The Caddy Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package caddyscript
-
-import (
-	"fmt"
-	"regexp"
-
-	"go.starlark.net/starlark"
-)
-
-// Regexp represents a regexp type for caddyscript.
-type Regexp struct{}
-
-// AttrNames defines what properties and methods are available on the Time type.
-func (r Regexp) AttrNames() []string {
-	return []string{"match_string"}
-}
-
-// Attr defines what happens when props or methods are called on the Time type.
-func (r Regexp) Attr(name string) (starlark.Value, error) {
-	switch name {
-	case "match_string":
-		b := starlark.NewBuiltin("match_string", r.MatchString)
-		b = b.BindReceiver(r)
-		return b, nil
-	}
-
-	return nil, nil
-}
-
-// MatchString reports whether the string s contains any match of the regular expression pattern. More complicated queries need to use Compile and the full Regexp interface.
-func (r Regexp) MatchString(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var pattern, match string
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 2, &pattern, &match)
-	if err != nil {
-		return starlark.None, fmt.Errorf("could not unpack args: %v", err.Error())
-	}
-
-	matched, err := regexp.MatchString(pattern, match)
-	if err != nil {
-		return starlark.False, fmt.Errorf("matchstring: %v", err.Error())
-	}
-
-	return starlark.Bool(matched), nil
-}
-
-func (r Regexp) Freeze()               {}
-func (r Regexp) Hash() (uint32, error) { return 0, fmt.Errorf("unhashable: Regexp") }
-func (r Regexp) String() string        { return "Regexp" }
-func (r Regexp) Type() string          { return "Regexp" }
-func (r Regexp) Truth() starlark.Bool  { return true }
diff --git a/pkg/caddyscript/lib/time.go b/pkg/caddyscript/lib/time.go
deleted file mode 100644
index 0e2f4e4..0000000
--- a/pkg/caddyscript/lib/time.go
+++ /dev/null
@@ -1,144 +0,0 @@
-// Copyright 2015 Matthew Holt and The Caddy Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package caddyscript
-
-import (
-	"fmt"
-	ti "time"
-
-	"go.starlark.net/starlark"
-)
-
-// Time represents a time type for caddyscript.
-type Time struct {
-	value int64 // time since epoch in nanoseconds
-}
-
-// AttrNames defines what properties and methods are available on the Time type.
-func (r Time) AttrNames() []string {
-	return []string{"now", "parse", "add", "subtract", "minute", "hour", "day", "value"}
-}
-
-// Attr defines what happens when props or methods are called on the Time type.
-func (r Time) Attr(name string) (starlark.Value, error) {
-	switch name {
-	case "now":
-		b := starlark.NewBuiltin("now", r.Now)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "parse_duration":
-		b := starlark.NewBuiltin("parse_duration", r.ParseDuration)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "add":
-		b := starlark.NewBuiltin("add", r.Add)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "subtract":
-		b := starlark.NewBuiltin("subtract", r.Subtract)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "minute":
-		b := starlark.NewBuiltin("minute", r.Minute)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "hour":
-		b := starlark.NewBuiltin("hour", r.Hour)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "day":
-		b := starlark.NewBuiltin("day", r.Day)
-		b = b.BindReceiver(r)
-		return b, nil
-	case "value":
-		return starlark.MakeInt64(r.value), nil
-	}
-
-	return nil, nil
-}
-
-func (r Time) Freeze()               {}
-func (r Time) Hash() (uint32, error) { return 0, fmt.Errorf("unhashable: Time") }
-func (r Time) String() string        { return fmt.Sprint(r.value) }
-func (r Time) Type() string          { return "Time" }
-func (r Time) Truth() starlark.Bool  { return true }
-
-// Hour returns the current hour of a unix timestamp in range [0, 23].
-func (r Time) Hour(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	t := ti.Unix(0, r.value)
-	return starlark.MakeInt(t.Hour()), nil
-}
-
-// Minute returns the current minute of the hour for a unix timestamp in range [0, 59].
-func (r Time) Minute(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	t := ti.Unix(0, r.value)
-	return starlark.MakeInt(t.Minute()), nil
-}
-
-// Day returns the current day in a week of a unix timestamp... [Sunday = 0...]
-func (r Time) Day(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	t := ti.Unix(0, r.value)
-	return starlark.MakeInt(int(t.Weekday())), nil
-}
-
-// Now returns the current time as a unix timestamp.
-func (r Time) Now(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	val := ti.Now().UnixNano()
-	r.value = val
-	return r, nil
-}
-
-// ParseDuration parses a go duration string to a time type.
-func (r Time) ParseDuration(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var dur string
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 1, &dur)
-	if err != nil {
-		return starlark.None, fmt.Errorf("could not unpack args: %v", err.Error())
-	}
-
-	if parsed, err := ti.ParseDuration(dur); err == nil {
-		val := parsed.Nanoseconds()
-		r.value = val
-		return r, nil
-	}
-
-	return starlark.None, fmt.Errorf("time.parse_duration: argument cannot be parsed as a valid go time duration")
-}
-
-// Add adds time to a time type.
-func (r Time) Add(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var t Time
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 1, &t)
-	if err != nil {
-		return starlark.None, fmt.Errorf("could not unpack args: %v", err.Error())
-	}
-
-	val := r.value + t.value
-	r.value = val
-	return r, nil
-}
-
-// Subtract adds time to a time type.
-func (r Time) Subtract(thread *starlark.Thread, fn *starlark.Builtin, args starlark.Tuple, kwargs []starlark.Tuple) (starlark.Value, error) {
-	var t Time
-	err := starlark.UnpackPositionalArgs(fn.Name(), args, kwargs, 1, &t)
-	if err != nil {
-		return starlark.None, fmt.Errorf("could not unpack args: %v", err.Error())
-	}
-
-	val := r.value - t.value
-	r.value = val
-	return r, nil
-}
diff --git a/pkg/caddyscript/matcherenv.go b/pkg/caddyscript/matcherenv.go
deleted file mode 100644
index 6c9fb50..0000000
--- a/pkg/caddyscript/matcherenv.go
+++ /dev/null
@@ -1,32 +0,0 @@
-// Copyright 2015 Matthew Holt and The Caddy Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package caddyscript
-
-import (
-	"net/http"
-
-	caddyscript "github.com/caddyserver/caddy/v2/pkg/caddyscript/lib"
-	"go.starlark.net/starlark"
-)
-
-// MatcherEnv sets up the global context for the matcher caddyscript environment.
-func MatcherEnv(r *http.Request) starlark.StringDict {
-	env := make(starlark.StringDict)
-	env["req"] = caddyscript.HTTPRequest{Req: r}
-	env["time"] = caddyscript.Time{}
-	env["regexp"] = caddyscript.Regexp{}
-
-	return env
-}