129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package lint
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import (
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"strings"
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"unicode"
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)
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// Name returns a different name if it should be different.
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func Name(name string, whitelist, blacklist []string) (should string) {
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// Fast path for simple cases: "_" and all lowercase.
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if name == "_" {
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return name
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}
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allLower := true
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for _, r := range name {
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if !unicode.IsLower(r) {
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allLower = false
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break
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}
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}
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if allLower {
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return name
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}
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// Split camelCase at any lower->upper transition, and split on underscores.
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// Check each word for common initialisms.
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runes := []rune(name)
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w, i := 0, 0 // index of start of word, scan
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for i+1 <= len(runes) {
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eow := false // whether we hit the end of a word
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if i+1 == len(runes) {
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eow = true
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} else if runes[i+1] == '_' {
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// underscore; shift the remainder forward over any run of underscores
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eow = true
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n := 1
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for i+n+1 < len(runes) && runes[i+n+1] == '_' {
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n++
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}
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// Leave at most one underscore if the underscore is between two digits
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if i+n+1 < len(runes) && unicode.IsDigit(runes[i]) && unicode.IsDigit(runes[i+n+1]) {
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n--
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}
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copy(runes[i+1:], runes[i+n+1:])
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runes = runes[:len(runes)-n]
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} else if unicode.IsLower(runes[i]) && !unicode.IsLower(runes[i+1]) {
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// lower->non-lower
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eow = true
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}
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i++
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if !eow {
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continue
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}
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// [w,i) is a word.
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word := string(runes[w:i])
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ignoreInitWarnings := map[string]bool{}
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for _, i := range whitelist {
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ignoreInitWarnings[i] = true
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}
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extraInits := map[string]bool{}
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for _, i := range blacklist {
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extraInits[i] = true
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}
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if u := strings.ToUpper(word); (commonInitialisms[u] || extraInits[u]) && !ignoreInitWarnings[u] {
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// Keep consistent case, which is lowercase only at the start.
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if w == 0 && unicode.IsLower(runes[w]) {
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u = strings.ToLower(u)
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}
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// All the common initialisms are ASCII,
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// so we can replace the bytes exactly.
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copy(runes[w:], []rune(u))
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} else if w > 0 && strings.ToLower(word) == word {
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// already all lowercase, and not the first word, so uppercase the first character.
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runes[w] = unicode.ToUpper(runes[w])
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}
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w = i
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}
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return string(runes)
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}
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// commonInitialisms is a set of common initialisms.
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// Only add entries that are highly unlikely to be non-initialisms.
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// For instance, "ID" is fine (Freudian code is rare), but "AND" is not.
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var commonInitialisms = map[string]bool{
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"ACL": true,
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"API": true,
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"ASCII": true,
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"CPU": true,
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"CSS": true,
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"DNS": true,
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"EOF": true,
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"GUID": true,
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"HTML": true,
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"HTTP": true,
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"HTTPS": true,
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"ID": true,
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"IP": true,
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"JSON": true,
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"LHS": true,
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"QPS": true,
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"RAM": true,
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"RHS": true,
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"RPC": true,
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"SLA": true,
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"SMTP": true,
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"SQL": true,
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"SSH": true,
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"TCP": true,
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"TLS": true,
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"TTL": true,
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"UDP": true,
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"UI": true,
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"UID": true,
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"UUID": true,
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"URI": true,
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"URL": true,
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"UTF8": true,
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"VM": true,
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"XML": true,
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"XMPP": true,
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"XSRF": true,
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"XSS": true,
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}
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