72 lines
2.2 KiB
Go
72 lines
2.2 KiB
Go
// Copyright 2022 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package common
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import (
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"fmt"
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"regexp"
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"strings"
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"dawn.googlesource.com/dawn/tools/src/container"
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)
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// The regular expression used to search for the CTS hash
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var reCTSHash = regexp.MustCompile(reEscape(ctsHashPrefix) + `[0-9a-fA-F]+`)
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const (
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// The string prefix for the CTS hash in the DEPs file, used for identifying
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// and updating the DEPS file.
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ctsHashPrefix = `{chromium_git}/external/github.com/gpuweb/cts@`
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)
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func reEscape(s string) string {
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return strings.ReplaceAll(strings.ReplaceAll(s, `/`, `\/`), `.`, `\.`)
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}
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// UpdateCTSHashInDeps replaces the CTS hashes in 'deps' with 'newCTSHash'.
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// Returns:
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// newDEPS - the new DEPS content
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// oldCTSHash - the old CTS hash in the 'deps'
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func UpdateCTSHashInDeps(deps, newCTSHash string) (newDEPS, oldCTSHash string, err error) {
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// Collect old CTS hashes, and replace these with newCTSHash
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b := strings.Builder{}
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oldCTSHashes := []string{}
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matches := reCTSHash.FindAllStringIndex(deps, -1)
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if len(matches) == 0 {
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return "", "", fmt.Errorf("failed to find a CTS hash in DEPS file")
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}
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end := 0
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for _, match := range matches {
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oldCTSHashes = append(oldCTSHashes, deps[match[0]+len(ctsHashPrefix):match[1]])
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b.WriteString(deps[end:match[0]])
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b.WriteString(ctsHashPrefix + newCTSHash)
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end = match[1]
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}
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b.WriteString(deps[end:])
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newDEPS = b.String()
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if deps == newDEPS {
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fmt.Println("CTS is already up to date")
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return "", "", nil
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}
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if s := container.NewSet(oldCTSHashes...); len(s) > 1 {
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fmt.Println("DEPS contained multiple hashes for CTS, using first for logs")
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}
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oldCTSHash = oldCTSHashes[0]
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return newDEPS, oldCTSHash, nil
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}
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