Generate relative paths in JS source maps

Also, add CLI options to manipulate prefixes of path

See KT-4078

compiler/testData/cli/js/jsHelp.out

@@ -4,6 +4,9 @@ where possible options include:
   -no-stdlib                 Don't use bundled Kotlin stdlib
   -libraries <path>          Paths to Kotlin libraries with .meta.js and .kjsm files, separated by system path separator
   -source-map                Generate source map
+  -source-map-prefix         Prefix for paths in a source map
+  -source-map-source-roots <path>
+                             Base directories which are used to calculate relative paths to source files in source map
   -meta-info                 Generate .meta.js and .kjsm files with metadata. Use to create a library
   -target { v5 }             Generate JS files for specific ECMA version
   -module-kind { plain, amd, commonjs, umd }

compiler/testData/cli/js/sourceMap.args

@@ -0,0 +1,5 @@
+$TESTDATA_DIR$/sourceMap.kt
+-no-stdlib
+-source-map
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMap.kt

@@ -0,0 +1,5 @@
+var log = ""
+
+fun foo(x: String) {
+    log += "$x;"
+}

compiler/testData/cli/js/sourceMap.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMap.test

@@ -0,0 +1,2 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "sourceMap.kt"

compiler/testData/cli/js/sourceMapPrefix.args

@@ -0,0 +1,7 @@
+$TESTDATA_DIR$/sourceMap.kt
+-no-stdlib
+-source-map
+-source-map-prefix
+http://localhost:8080/src/
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMapPrefix.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMapPrefix.test

@@ -0,0 +1,2 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "http://localhost:8080/src/sourceMap.kt"

compiler/testData/cli/js/sourceMapRoot/bar/baz/file3.kt

@@ -0,0 +1,3 @@
+fun h(): Long {
+    return 42L
+}

compiler/testData/cli/js/sourceMapRoot/bar/file2.kt

@@ -0,0 +1,3 @@
+fun g(): Int {
+    return 23
+}

compiler/testData/cli/js/sourceMapRoot/foo/baz/file4.kt

@@ -0,0 +1,3 @@
+fun j(): Float {
+    return 3.14159f
+}

compiler/testData/cli/js/sourceMapRoot/foo/file1.kt

@@ -0,0 +1,3 @@
+fun f(): String {
+    return "f()"
+}

compiler/testData/cli/js/sourceMapRootAuto.args

@@ -0,0 +1,6 @@
+$TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
+$TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
+-no-stdlib
+-source-map
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMapRootAuto.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMapRootAuto.test

@@ -0,0 +1,3 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "foo/file1.kt"
+// CONTAINS: out.js.map, "bar/file2.kt"

compiler/testData/cli/js/sourceMapRootManual.args

@@ -0,0 +1,8 @@
+$TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
+$TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
+-no-stdlib
+-source-map
+-source-map-source-roots
+$TESTDATA_DIR$/
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMapRootManual.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMapRootManual.test

@@ -0,0 +1,3 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "sourceMapRoot/foo/file1.kt"
+// CONTAINS: out.js.map, "sourceMapRoot/bar/file2.kt"

compiler/testData/cli/js/sourceMapRootMissing.args

@@ -0,0 +1,10 @@
+$TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
+$TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
+$TESTDATA_DIR$/sourceMapRoot/bar/baz/file3.kt
+$TESTDATA_DIR$/sourceMapRoot/foo/baz/file4.kt
+-no-stdlib
+-source-map
+-source-map-source-roots
+$TESTDATA_DIR$/sourceMapRoot/foo
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMapRootMissing.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMapRootMissing.test

@@ -0,0 +1,5 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "file1.kt"
+// CONTAINS: out.js.map, "baz/file4.kt"
+// CONTAINS: out.js.map, "file2.kt"
+// CONTAINS: out.js.map, "file3.kt"

compiler/testData/cli/js/sourceMapRootMultiple.args

@@ -0,0 +1,8 @@
+$TESTDATA_DIR$/sourceMapRoot/foo/file1.kt
+$TESTDATA_DIR$/sourceMapRoot/bar/file2.kt
+-no-stdlib
+-source-map
+-source-map-source-roots
+$TESTDATA_DIR$/foo:$TESTDATA_DIR$/bar
+-output
+$TEMP_DIR$/out.js

compiler/testData/cli/js/sourceMapRootMultiple.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/js/sourceMapRootMultiple.test

@@ -0,0 +1,3 @@
+// EXISTS: out.js
+// CONTAINS: out.js.map, "file1.kt"
+// CONTAINS: out.js.map, "file2.kt"