wehub-resource-sync
85 lines
2.8 KiB
Go
85 lines
2.8 KiB
Go
// Copyright 2025 Dolthub, Inc.
|
|
//
|
|
// 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 main
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os"
|
|
)
|
|
|
|
// limitedSequences contains indices for sequences that should use the limited character set.
|
|
var limitedSequences = make(map[int]struct{})
|
|
|
|
func main() {
|
|
if len(os.Args) != 3 {
|
|
fmt.Println("Expected two arguments, the first containing the SQL file, and the second containing the output file.")
|
|
os.Exit(1)
|
|
}
|
|
sqlFileBytes, err := os.ReadFile(os.Args[1])
|
|
if err != nil {
|
|
fmt.Println(err.Error())
|
|
os.Exit(1)
|
|
}
|
|
var sequences [][]rune // This holds all sequences, where a sequence is a run of special characters or non-special characters
|
|
lastReadSpecial := false // When this is true, the last rune that was read was a special rune
|
|
runeCache := make([]rune, 0, 512) // The rune cache holds all of the runes read since the last special (or normal) rune
|
|
|
|
// This loop gathers all sequences
|
|
for _, r := range string(sqlFileBytes) {
|
|
isSpecial := isSpecialRune(r)
|
|
if isSpecial != lastReadSpecial && len(runeCache) > 0 {
|
|
// We must preserve control characters, which will always start with a special rune (preserving them)
|
|
if isControlCharacter(runeCache, r) {
|
|
sequence := make([]rune, len(runeCache)+1)
|
|
copy(sequence, runeCache)
|
|
sequence[len(sequence)-1] = r
|
|
sequences = append(sequences, sequence)
|
|
runeCache = runeCache[:0]
|
|
lastReadSpecial = true
|
|
// The sequences following a hex control character will use a limited character set for replacements
|
|
if r == 'x' {
|
|
limitedSequences[len(sequences)] = struct{}{}
|
|
}
|
|
continue
|
|
}
|
|
sequence := make([]rune, len(runeCache))
|
|
copy(sequence, runeCache)
|
|
sequences = append(sequences, sequence)
|
|
runeCache = runeCache[:0]
|
|
}
|
|
runeCache = append(runeCache, r)
|
|
lastReadSpecial = isSpecial
|
|
}
|
|
|
|
// Look for UUIDs to ensure that they're handled correctly
|
|
handleUUIDs(sequences)
|
|
|
|
// We write all sequences to the buffer, inserting the replacements when applicable
|
|
buffer := bytes.Buffer{}
|
|
buffer.Grow(int(float64(len(sqlFileBytes)) * 1.5))
|
|
for seqIdx, sequence := range sequences {
|
|
_, ok := limitedSequences[seqIdx]
|
|
buffer.WriteString(getReplacement(sequence, ok))
|
|
}
|
|
|
|
// Now we write the buffer to the output file
|
|
err = os.WriteFile(os.Args[2], buffer.Bytes(), 0644)
|
|
if err != nil {
|
|
fmt.Println(err.Error())
|
|
os.Exit(1)
|
|
}
|
|
}
|