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authorMihai Bazon <mihai@bazon.net>2012-09-24 17:02:18 +0300
committerMihai Bazon <mihai@bazon.net>2012-09-24 17:02:18 +0300
commit42038fd67f49be16a01be8a7f8085d9a52f13c50 (patch)
treee620c06950ec351c3b135eda249b4165aa4ff589 /bin/uglifyjs2
parent4f97da96608744e9f20c3994d8d1e66d6b6949a1 (diff)
downloadtracifyjs-42038fd67f49be16a01be8a7f8085d9a52f13c50.tar.gz
tracifyjs-42038fd67f49be16a01be8a7f8085d9a52f13c50.zip
Support input source map
This is useful while compressing generated code; for example compressing JS compiled by CoffeeScript (assuming you got a source map): uglifyjs2 --in-source-map generated.js.map \ --source-map uglified.js.map \ -o uglified.js The above assumes you have a "generated.js.map" file which is the source mapping between your CoffeeScript and the generated.js (compiled output from CoffeeScript). The name of the input file is not present in this example; it will be fetched from the source map (but it can be passed manually too). The output will be in "uglified.js" and the output map "uglified.js.map" will actually map to the original CoffeeScript code, rather than to generated.js.
Diffstat (limited to 'bin/uglifyjs2')
-rwxr-xr-xbin/uglifyjs221
1 files changed, 19 insertions, 2 deletions
diff --git a/bin/uglifyjs2 b/bin/uglifyjs2
index 0ed873a9..aa302044 100755
--- a/bin/uglifyjs2
+++ b/bin/uglifyjs2
@@ -12,6 +12,7 @@ Use a single dash to read input from the standard input.\
")
.describe("source-map", "Specify an output file where to generate source map.")
.describe("source-map-root", "The path to the original source to be included in the source map.")
+ .describe("in-source-map", "Input source map, useful if you're compressing JS that was generated from some other original code.")
.describe("p", "Skip prefix for original filenames that appear in source maps. For example -p 3 will drop 3 directories from file names and ensure they are relative paths.")
.describe("o", "Output file (default STDOUT)")
.describe("b", "Beautify output")
@@ -60,12 +61,27 @@ if (ARGS.c && ARGS.c !== true) {
var a = opt.split(/\s*=\s*/);
COMPRESSOR_OPTIONS[a[0]] = new Function("return(" + a[1] + ")")();
});
+ normalize(COMPRESSOR_OPTIONS);
}
var files = ARGS._.slice();
-if (files.length == 0)
+var ORIG_MAP = ARGS.in_source_map;
+
+if (ORIG_MAP) {
+ ORIG_MAP = JSON.parse(fs.readFileSync(ORIG_MAP));
+ if (files.length == 0) {
+ sys.error("INFO: Using file from the input source map: " + ORIG_MAP.file);
+ files = [ ORIG_MAP.file ];
+ }
+ if (ARGS.source_map_root == null) {
+ ARGS.source_map_root = ORIG_MAP.sourceRoot;
+ }
+}
+
+if (files.length == 0) {
files = [ "-" ];
+}
if (files.indexOf("-") >= 0 && ARGS.source_map) {
sys.error("ERROR: Source map doesn't work with input from STDIN");
@@ -83,7 +99,8 @@ var TOPLEVEL = null;
var SOURCE_MAP = ARGS.source_map ? UglifyJS.SourceMap({
file: OUTPUT_FILE,
- root: ARGS.source_map_root
+ root: ARGS.source_map_root,
+ orig: ORIG_MAP,
}) : null;
var output = UglifyJS.OutputStream({