automatically generate the separate files

Author: evanw

pkg/api/api_js_table.go

@@ -1,3 +1,5 @@
+// This file was automatically generated by "compat-table.js"
+
 package api
 
 import "github.com/evanw/esbuild/internal/compat"

pkg/cli/cli_js_table.go

@@ -1,3 +1,5 @@
+// This file was automatically generated by "compat-table.js"
+
 package cli
 
 import "github.com/evanw/esbuild/pkg/api"

scripts/compat-table.js

@@ -83,9 +83,12 @@ const features = {
 
 const versions = {}
 const engines = [
+  // The JavaScript standard
+  'es',
+
+  // Common JavaScript runtimes
   'chrome',
   'edge',
-  'es',
   'firefox',
   'ie',
   'ios',
@@ -362,6 +365,15 @@ function jsTableMap(obj) {
   }).join('\n')}\n\t}`
 }
 
+function jsTableValidEnginesMap(engines) {
+  const keys = engines.slice().sort()
+  const maxLength = keys.reduce((a, b) => Math.max(a, b.length + 4), 0)
+  if (keys.length === 0) return '{}'
+  return keys.map(x => {
+    return `\t${`"${x}": `.padEnd(maxLength)}api.Engine${upper(x)},`
+  }).join('\n')
+}
+
 fs.writeFileSync(__dirname + '/../internal/compat/js_table.go',
   `// This file was automatically generated by "${path.basename(__filename)}"
 
@@ -370,12 +382,12 @@ package compat
 type Engine uint8
 
 const (
-${engines.map((x, i) => `\t${upper(x)}${i ? '' : ' Engine = iota'}`).join('\n')}
+${engines.slice().sort().map((x, i) => `\t${upper(x)}${i ? '' : ' Engine = iota'}`).join('\n')}
 )
 
 func (e Engine) String() string {
 \tswitch e {
-${engines.map((x, i) => `\tcase ${upper(x)}:\n\t\treturn "${x}"`).join('\n')}
+${engines.slice().sort().map(x => `\tcase ${upper(x)}:\n\t\treturn "${x}"`).join('\n')}
 \t}
 \treturn ""
 }
@@ -418,3 +430,37 @@ func UnsupportedJSFeatures(constraints map[Engine][]int) (unsupported JSFeature)
 \treturn
 }
 `)
+
+fs.writeFileSync(__dirname + '/../pkg/api/api_js_table.go',
+  `// This file was automatically generated by "${path.basename(__filename)}"
+
+package api
+
+import "github.com/evanw/esbuild/internal/compat"
+
+type EngineName uint8
+
+const (
+${engines.filter(x => x !== 'es').map((x, i) => `\tEngine${upper(x)}${i ? '' : ' EngineName = iota'}`).join('\n')}
+)
+
+func convertEngineName(engine EngineName) compat.Engine {
+\tswitch engine {
+${engines.filter(x => x !== 'es').map(x => `\tcase Engine${upper(x)}:\n\t\treturn compat.${upper(x)}`).join('\n')}
+\tdefault:
+\t\tpanic("Invalid engine name")
+\t}
+}
+`)
+
+fs.writeFileSync(__dirname + '/../pkg/cli/cli_js_table.go',
+  `// This file was automatically generated by "${path.basename(__filename)}"
+
+package cli
+
+import "github.com/evanw/esbuild/pkg/api"
+
+var validEngines = map[string]api.EngineName{
+${jsTableValidEnginesMap(engines.filter(x => x !== 'es'))}
+}
+`)