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improve error messages (#1506)

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- better inheritance of `Error` sub-classes
- mark parse error against source in CLI

closes #235
closes #348
closes #524
closes #1356
closes #1405
This commit is contained in:
Alex Lam S.L
2017-02-27 03:40:54 +08:00
committed by GitHub
parent b1c593a041
commit 872270b149
15 changed files with 133 additions and 48 deletions
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18
bin/uglifyjs
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@@ -364,7 +364,21 @@ async.eachLimit(files, 1, function (file, cb) {
} catch(ex) {
if (ex instanceof UglifyJS.JS_Parse_Error) {
print_error("Parse error at " + file + ":" + ex.line + "," + ex.col);
print_error(ex.message);
var col = ex.col;
var line = code.split(/\r?\n/)[ex.line - (col ? 1 : 2)];
if (line) {
if (col > 40) {
line = line.slice(col - 40);
col = 40;
}
if (col) {
print_error(line.slice(0, 80));
print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
} else {
print_error(line.slice(-40));
print_error(line.slice(-40).replace(/\S/g, " ") + "^");
}
}
print_error(ex.stack);
process.exit(1);
}
@@ -390,7 +404,7 @@ async.eachLimit(files, 1, function (file, cb) {
var compressor = COMPRESS && UglifyJS.Compressor(COMPRESS);
} catch(ex) {
if (ex instanceof UglifyJS.DefaultsError) {
print_error(ex.msg);
print_error(ex.message);
print_error("Supported options:");
print_error(sys.inspect(ex.defs));
process.exit(1);