diff --git a/lib/analyze.js b/lib/analyze.js
index 580b3a6a0..bd1235954 100644
--- a/lib/analyze.js
+++ b/lib/analyze.js
@@ -114,6 +114,7 @@ async function runQueries(sarifFolder, memoryFlag, addSnippetsFlag, threadsFlag,
                 statusReport[`analyze_custom_queries_${language}_duration_ms`] =
                     new Date().getTime() - startTimeCustom;
             }
+            printLinesOfCodeSummary(logger, language, await locPromise);
         }
         catch (e) {
             logger.info(e);
@@ -154,11 +155,12 @@ async function runAnalyze(outputDir, memoryFlag, addSnippetsFlag, threadsFlag, a
 exports.runAnalyze = runAnalyze;
 async function injectLinesOfCode(sarifFile, language, locPromise) {
     const lineCounts = await locPromise;
+    const idPrefix = count_loc_1.getIdPrefix(language);
     if (language in lineCounts) {
         const sarif = JSON.parse(fs.readFileSync(sarifFile, "utf8"));
         if (Array.isArray(sarif.runs)) {
             for (const run of sarif.runs) {
-                const ruleId = `${language}/summary/lines-of-code`;
+                const ruleId = `${idPrefix}/summary/lines-of-code`;
                 run.properties = run.properties || {};
                 run.properties.metricResults = run.properties.metricResults || [];
                 const rule = run.properties.metricResults.find(
@@ -173,4 +175,9 @@ async function injectLinesOfCode(sarifFile, language, locPromise) {
         fs.writeFileSync(sarifFile, JSON.stringify(sarif));
     }
 }
+function printLinesOfCodeSummary(logger, language, lineCounts) {
+    if (language in lineCounts) {
+        logger.info(`Counted ${lineCounts[language]} lines of code for ${language} as a baseline.`);
+    }
+}
 //# sourceMappingURL=analyze.js.map
\ No newline at end of file
diff --git a/lib/analyze.js.map b/lib/analyze.js.map
index b6a3da534..1b15cd446 100644
--- a/lib/analyze.js.map
+++ b/lib/analyze.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"analyze.js","sourceRoot":"","sources":["../src/analyze.ts"],"names":[],"mappings":";;;;;;;;;AAAA,uCAAyB;AACzB,2CAA6B;AAE7B,yEAA2D;AAE3D,gEAAkD;AAClD,qCAAqC;AAErC,2CAAoD;AACpD,2CAA0D;AAE1D,gEAAkD;AAClD,6CAAiD;AACjD,6CAA+B;AAE/B,MAAa,mBAAoB,SAAQ,KAAK;IAG5C,YAAY,mBAAwC,EAAE,OAAe;QACnE,KAAK,CAAC,OAAO,CAAC,CAAC;QAEf,IAAI,CAAC,IAAI,GAAG,qBAAqB,CAAC;QAClC,IAAI,CAAC,mBAAmB,GAAG,mBAAmB,CAAC;IACjD,CAAC;CACF;AATD,kDASC;AA+BD,KAAK,UAAU,oBAAoB,CAAC,MAAc;IAChD,MAAM,YAAY,GAAG,OAAO,CAAC,GAAG,CAAC,eAAe,CAAC,CAAC;IAClD,IAAI,YAAY,KAAK,SAAS,IAAI,YAAY,CAAC,MAAM,KAAK,CAAC,EAAE;QAC3D,+FAA+F;QAC/F,OAAO;KACR;IAED,IAAI,MAAM,GAAG,EAAE,CAAC;IAChB,MAAM,OAAO,GAAG;QACd,SAAS,EAAE;YACT,MAAM,EAAE,CAAC,IAAY,EAAE,EAAE;gBACvB,MAAM,IAAI,IAAI,CAAC,QAAQ,EAAE,CAAC;YAC5B,CAAC;SACF;KACF,CAAC;IAEF,MAAM,IAAI,UAAU,CAAC,UAAU,CAC7B,YAAY,EACZ;QACE,IAAI;QACJ,8EAA8E;KAC/E,EACD,OAAO,CACR,CAAC,IAAI,EAAE,CAAC;IACT,MAAM,CAAC,IAAI,CAAC,kCAAkC,MAAM,EAAE,CAAC,CAAC;IACxD,OAAO,CAAC,GAAG,CAAC,wBAAwB,CAAC,GAAG,MAAM,CAAC;IAE/C,MAAM,GAAG,EAAE,CAAC;IACZ,MAAM,IAAI,UAAU,CAAC,UAAU,CAC7B,YAAY,EACZ,CAAC,IAAI,EAAE,wCAAwC,CAAC,EAChD,OAAO,CACR,CAAC,IAAI,EAAE,CAAC;IACT,MAAM,CAAC,IAAI,CAAC,qCAAqC,MAAM,EAAE,CAAC,CAAC;IAC3D,OAAO,CAAC,GAAG,CAAC,2BAA2B,CAAC,GAAG,MAAM,CAAC;AACpD,CAAC;AAED,KAAK,UAAU,4BAA4B,CACzC,MAA0B,EAC1B,MAAc;IAEd,sEAAsE;IACtE,oCAAoC;IACpC,aAAa,CAAC,8BAA8B,CAAC,MAAM,CAAC,CAAC;IAErD,MAAM,MAAM,GAAG,kBAAS,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;IAC3C,KAAK,MAAM,QAAQ,IAAI,MAAM,CAAC,SAAS,EAAE;QACvC,IAAI,6BAAiB,CAAC,QAAQ,CAAC,EAAE;YAC/B,MAAM,CAAC,UAAU,CAAC,cAAc,QAAQ,EAAE,CAAC,CAAC;YAE5C,IAAI,QAAQ,KAAK,oBAAQ,CAAC,MAAM,EAAE;gBAChC,MAAM,oBAAoB,CAAC,MAAM,CAAC,CAAC;aACpC;YAED,MAAM,MAAM,CAAC,sBAAsB,CACjC,IAAI,CAAC,qBAAqB,CAAC,MAAM,CAAC,OAAO,EAAE,QAAQ,CAAC,EACpD,QAAQ,CACT,CAAC;YACF,MAAM,CAAC,QAAQ,EAAE,CAAC;SACnB;KACF;AACH,CAAC;AAED,KAAK,UAAU,wBAAwB,CACrC,MAA0B,EAC1B,WAAmB,EACnB,MAAc;IAEd,MAAM,4BAA4B,CAAC,MAAM,EAAE,MAAM,CAAC,CAAC;IAEnD,MAAM,MAAM,GAAG,kBAAS,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC;IAC3C,KAAK,MAAM,QAAQ,IAAI,MAAM,CAAC,SAAS,EAAE;QACvC,MAAM,CAAC,UAAU,CAAC,cAAc,QAAQ,EAAE,CAAC,CAAC;QAC5C,MAAM,MAAM,CAAC,gBAAgB,CAC3B,IAAI,CAAC,qBAAqB,CAAC,MAAM,CAAC,OAAO,EAAE,QAAQ,CAAC,EACpD,WAAW,CACZ,CAAC;QACF,MAAM,CAAC,QAAQ,EAAE,CAAC;KACnB;AACH,CAAC;AAED,2DAA2D;AACpD,KAAK,UAAU,UAAU,CAC9B,WAAmB,EACnB,UAAkB,EAClB,eAAuB,EACvB,WAAmB,EACnB,mBAAuC,EACvC,MAA0B,EAC1B,MAAc;IAEd,MAAM,YAAY,GAAwB,EAAE,CAAC;IAE7C,8CAA8C;IAC9C,MAAM,UAAU,GAAG,oBAAQ,CACzB,IAAI,CAAC,OAAO,EAAE;IACd,2DAA2D;IAC3D,8DAA8D;IAC9D,aAAa;IACb,MAAM,CAAC,KAAK,EACZ,MAAM,CAAC,WAAW,EAClB,MAAM,CAAC,SAAS,EAChB,MAAM,CACP,CAAC;IAEF,KAAK,MAAM,QAAQ,IAAI,MAAM,CAAC,SAAS,EAAE;QACvC,MAAM,CAAC,UAAU,CAAC,aAAa,QAAQ,EAAE,CAAC,CAAC;QAE3C,MAAM,OAAO,GAAG,MAAM,CAAC,OAAO,CAAC,QAAQ,CAAC,CAAC;QACzC,IAAI,OAAO,CAAC,OAAO,CAAC,MAAM,KAAK,CAAC,IAAI,OAAO,CAAC,MAAM,CAAC,MAAM,KAAK,CAAC,EAAE;YAC/D,MAAM,IAAI,KAAK,CACb,qBAAqB,QAAQ,gDAAgD,CAC9E,CAAC;SACH;QAED,IAAI;YACF,IAAI,OAAO,CAAC,SAAS,CAAC,CAAC,MAAM,GAAG,CAAC,EAAE;gBACjC,MAAM,iBAAiB,GAAG,IAAI,IAAI,EAAE,CAAC,OAAO,EAAE,CAAC;gBAC/C,MAAM,SAAS,GAAG,MAAM,aAAa,CACnC,QAAQ,EACR,SAAS,EACT,OAAO,CAAC,SAAS,CAAC,EAClB,WAAW,EACX,SAAS,CACV,CAAC;gBACF,MAAM,iBAAiB,CAAC,SAAS,EAAE,QAAQ,EAAE,UAAU,CAAC,CAAC;gBAEzD,YAAY,CAAC,2BAA2B,QAAQ,cAAc,CAAC;oBAC7D,IAAI,IAAI,EAAE,CAAC,OAAO,EAAE,GAAG,iBAAiB,CAAC;aAC5C;YACD,MAAM,eAAe,GAAG,IAAI,IAAI,EAAE,CAAC,OAAO,EAAE,CAAC;YAC7C,MAAM,iBAAiB,GAAG,MAAM,CAAC,OAAO,CAAC;YACzC,MAAM,mBAAmB,GAAa,EAAE,CAAC;YACzC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,OAAO,CAAC,QAAQ,CAAC,CAAC,MAAM,EAAE,EAAE,CAAC,EAAE;gBACjD,IAAI,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,MAAM,GAAG,CAAC,EAAE;oBAC3C,MAAM,SAAS,GAAG,MAAM,aAAa,CACnC,QAAQ,EACR,UAAU,CAAC,EAAE,EACb,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC,CAAC,CAAC,OAAO,EAC5B,iBAAiB,EACjB,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC,CAAC,CAAC,UAAU,CAChC,CAAC;oBACF,mBAAmB,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC;iBACrC;aACF;YACD,IAAI,mBAAmB,CAAC,MAAM,GAAG,CAAC,EAAE;gBAClC,MAAM,SAAS,GAAG,IAAI,CAAC,IAAI,CAAC,WAAW,EAAE,GAAG,QAAQ,eAAe,CAAC,CAAC;gBACrE,EAAE,CAAC,aAAa,CAAC,SAAS,EAAE,8BAAiB,CAAC,mBAAmB,CAAC,CAAC,CAAC;gBACpE,MAAM,iBAAiB,CAAC,SAAS,EAAE,QAAQ,EAAE,UAAU,CAAC,CAAC;gBAEzD,YAAY,CAAC,0BAA0B,QAAQ,cAAc,CAAC;oBAC5D,IAAI,IAAI,EAAE,CAAC,OAAO,EAAE,GAAG,eAAe,CAAC;aAC1C;YAED,uBAAuB,CAAC,MAAM,EAAE,QAAQ,EAAE,MAAM,UAAU,CAAC,CAAC;SAC7D;QAAC,OAAO,CAAC,EAAE;YACV,MAAM,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC;YACf,YAAY,CAAC,wBAAwB,GAAG,QAAQ,CAAC;YACjD,MAAM,IAAI,mBAAmB,CAC3B,YAAY,EACZ,8BAA8B,QAAQ,KAAK,CAAC,EAAE,CAC/C,CAAC;SACH;KACF;IAED,OAAO,YAAY,CAAC;IAEpB,KAAK,UAAU,aAAa,CAC1B,QAAkB,EAClB,IAAY,EACZ,OAAiB,EACjB,iBAAyB,EACzB,UAA8B;QAE9B,MAAM,YAAY,GAAG,IAAI,CAAC,qBAAqB,CAAC,MAAM,CAAC,OAAO,EAAE,QAAQ,CAAC,CAAC;QAC1E,uEAAuE;QACvE,2EAA2E;QAC3E,MAAM,cAAc,GAAG,GAAG,YAAY,YAAY,IAAI,MAAM,CAAC;QAC7D,MAAM,kBAAkB,GAAG,OAAO;aAC/B,GAAG,CAAC,CAAC,CAAS,EAAE,EAAE,CAAC,YAAY,CAAC,EAAE,CAAC;aACnC,IAAI,CAAC,IAAI,CAAC,CAAC;QACd,EAAE,CAAC,aAAa,CAAC,cAAc,EAAE,kBAAkB,CAAC,CAAC;QACrD,MAAM,CAAC,KAAK,CAAC,wBAAwB,QAAQ,QAAQ,kBAAkB,EAAE,CAAC,CAAC;QAE3E,MAAM,SAAS,GAAG,IAAI,CAAC,IAAI,CAAC,iBAAiB,EAAE,GAAG,QAAQ,IAAI,IAAI,QAAQ,CAAC,CAAC;QAE5E,MAAM,MAAM,GAAG,kBAAS,CAAC,MAAM,CAAC,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\ No newline at end of file
diff --git a/lib/analyze.test.js b/lib/analyze.test.js
index 9d2fab5d6..d3210ad82 100644
--- a/lib/analyze.test.js
+++ b/lib/analyze.test.js
@@ -16,6 +16,7 @@ const ava_1 = __importDefault(require("ava"));
 const sinon_1 = __importDefault(require("sinon"));
 const analyze_1 = require("./analyze");
 const codeql_1 = require("./codeql");
+const count_loc_1 = require("./count-loc");
 const count = __importStar(require("./count-loc"));
 const languages_1 = require("./languages");
 const logging_1 = require("./logging");
@@ -26,7 +27,7 @@ testing_utils_1.setupTests(ava_1.default);
 // and correct case of builtin or custom. Also checks the correct search
 // paths are set in the database analyze invocation.
 ava_1.default("status report fields and search path setting", async (t) => {
-    const mockLinesOfCode = Object.entries(languages_1.Language).reduce((obj, [lang], i) => {
+    const mockLinesOfCode = Object.values(languages_1.Language).reduce((obj, lang, i) => {
         // use a different line count for each language
         obj[lang] = i + 1;
         return obj;
@@ -48,7 +49,7 @@ ava_1.default("status report fields and search path setting", async (t) => {
                                 properties: {
                                     metricResults: [
                                         {
-                                            ruleId: `${language}/summary/lines-of-code`,
+                                            ruleId: `${count_loc_1.getIdPrefix(language)}/summary/lines-of-code`,
                                             value: 123,
                                         },
                                     ],
@@ -60,7 +61,7 @@ ava_1.default("status report fields and search path setting", async (t) => {
                                     metricResults: [
                                         {
                                             rule: {
-                                                id: `${language}/summary/lines-of-code`,
+                                                id: `${count_loc_1.getIdPrefix(language)}/summary/lines-of-code`,
                                             },
                                             value: 123,
                                         },
@@ -125,10 +126,11 @@ ava_1.default("status report fields and search path setting", async (t) => {
         });
     }
     function verifyLineCountForFile(lang, filePath, lineCount) {
+        const idPrefix = count_loc_1.getIdPrefix(lang);
         const sarif = JSON.parse(fs.readFileSync(filePath, "utf8"));
         t.deepEqual(sarif.runs[0].properties.metricResults, [
             {
-                ruleId: `${lang}/summary/lines-of-code`,
+                ruleId: `${idPrefix}/summary/lines-of-code`,
                 value: 123,
                 baseline: lineCount,
             },
@@ -136,7 +138,7 @@ ava_1.default("status report fields and search path setting", async (t) => {
         t.deepEqual(sarif.runs[1].properties.metricResults, [
             {
                 rule: {
-                    id: `${lang}/summary/lines-of-code`,
+                    id: `${idPrefix}/summary/lines-of-code`,
                 },
                 value: 123,
                 baseline: lineCount,
diff --git a/lib/analyze.test.js.map b/lib/analyze.test.js.map
index efd0d57f1..59a4e3c48 100644
--- a/lib/analyze.test.js.map
+++ b/lib/analyze.test.js.map
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/lib/count-loc.js b/lib/count-loc.js
index 4ff0af0d5..8164746ed 100644
--- a/lib/count-loc.js
+++ b/lib/count-loc.js
@@ -2,48 +2,44 @@
 Object.defineProperty(exports, "__esModule", { value: true });
 const github_linguist_1 = require("github-linguist");
 const languages_1 = require("./languages");
+const util_1 = require("./util");
 // Map from linguist language names to language prefixes used in the action and codeql
 const linguistToMetrics = {
-    c: {
-        name: languages_1.Language.cpp,
-        prefix: "cpp",
-    },
-    "c++": {
-        name: languages_1.Language.cpp,
-        prefix: "cpp",
-    },
-    "c#": {
-        name: languages_1.Language.csharp,
-        prefix: "cs",
-    },
-    go: {
-        name: languages_1.Language.go,
-        prefix: "go",
-    },
-    java: {
-        name: languages_1.Language.java,
-        prefix: "java",
-    },
-    javascript: {
-        name: languages_1.Language.javascript,
-        prefix: "js",
-    },
-    python: {
-        name: languages_1.Language.python,
-        prefix: "py",
-    },
-    typescript: {
-        name: languages_1.Language.javascript,
-        prefix: "js",
-    },
+    c: languages_1.Language.cpp,
+    "c++": languages_1.Language.cpp,
+    "c#": languages_1.Language.csharp,
+    go: languages_1.Language.go,
+    java: languages_1.Language.java,
+    javascript: languages_1.Language.javascript,
+    python: languages_1.Language.python,
+    typescript: languages_1.Language.javascript,
 };
-const nameToLinguist = Object.entries(linguistToMetrics).reduce((obj, [key, { name: action }]) => {
-    if (!obj[action]) {
-        obj[action] = [];
+const nameToLinguist = Object.entries(linguistToMetrics).reduce((obj, [key, name]) => {
+    if (!obj[name]) {
+        obj[name] = [];
     }
-    obj[action].push(key);
+    obj[name].push(key);
     return obj;
 }, {});
+function getIdPrefix(language) {
+    switch (language) {
+        case languages_1.Language.cpp:
+            return "cpp";
+        case languages_1.Language.csharp:
+            return "cs";
+        case languages_1.Language.go:
+            return "go";
+        case languages_1.Language.java:
+            return "java";
+        case languages_1.Language.javascript:
+            return "js";
+        case languages_1.Language.python:
+            return "py";
+        default:
+            util_1.assertNever(language);
+    }
+}
+exports.getIdPrefix = getIdPrefix;
 /**
  * Count the lines of code of the specified language using the include
  * and exclude glob paths.
@@ -57,7 +53,7 @@ const nameToLinguist = Object.entries(linguistToMetrics).reduce((obj, [key, { na
 async function countLoc(cwd, include, exclude, dbLanguages, logger) {
     const result = await new github_linguist_1.LocDir({
         cwd,
-        include: ["**"].concat(include || []),
+        include: Array.isArray(include) && include.length > 0 ? include : ["**"],
         exclude,
         analysisLanguages: dbLanguages.flatMap((lang) => nameToLinguist[lang]),
     }).loadInfo();
@@ -66,8 +62,8 @@ async function countLoc(cwd, include, exclude, dbLanguages, logger) {
     // the analysis uses slightly different names for language.
     const lineCounts = Object.entries(result.languages).reduce((obj, [language, { code }]) => {
         const metricsLanguage = linguistToMetrics[language];
-        if (metricsLanguage && dbLanguages.includes(metricsLanguage.name)) {
-            obj[metricsLanguage.prefix] = code + (obj[metricsLanguage.prefix] || 0);
+        if (metricsLanguage && dbLanguages.includes(metricsLanguage)) {
+            obj[metricsLanguage] = code + (obj[metricsLanguage] || 0);
         }
         return obj;
     }, {});
diff --git a/lib/count-loc.js.map b/lib/count-loc.js.map
index 99f720c27..8f01c5241 100644
--- a/lib/count-loc.js.map
+++ b/lib/count-loc.js.map
@@ -1 +1 @@
-{"version":3,"file":"count-loc.js","sourceRoot":"","sources":["../src/count-loc.ts"],"names":[],"mappings":";;AAAA,qDAAyC;AAEzC,2CAAuC;AAMvC,sFAAsF;AACtF,MAAM,iBAAiB,GAGnB;IACF,CAAC,EAAE;QACD,IAAI,EAAE,oBAAQ,CAAC,GAAG;QAClB,MAAM,EAAE,KAAK;KACd;IACD,KAAK,EAAE;QACL,IAAI,EAAE,oBAAQ,CAAC,GAAG;QAClB,MAAM,EAAE,KAAK;KACd;IACD,IAAI,EAAE;QACJ,IAAI,EAAE,oBAAQ,CAAC,MAAM;QACrB,MAAM,EAAE,IAAI;KACb;IACD,EAAE,EAAE;QACF,IAAI,EAAE,oBAAQ,CAAC,EAAE;QACjB,MAAM,EAAE,IAAI;KACb;IACD,IAAI,EAAE;QACJ,IAAI,EAAE,oBAAQ,CAAC,IAAI;QACnB,MAAM,EAAE,MAAM;KACf;IACD,UAAU,EAAE;QACV,IAAI,EAAE,oBAAQ,CAAC,UAAU;QACzB,MAAM,EAAE,IAAI;KACb;IACD,MAAM,EAAE;QACN,IAAI,EAAE,oBAAQ,CAAC,MAAM;QACrB,MAAM,EAAE,IAAI;KACb;IACD,UAAU,EAAE;QACV,IAAI,EAAE,oBAAQ,CAAC,UAAU;QACzB,MAAM,EAAE,IAAI;KACb;CACF,CAAC;AAEF,MAAM,cAAc,GAAG,MAAM,CAAC,OAAO,CAAC,iBAAiB,CAAC,CAAC,MAAM,CAC7D,CAAC,GAAG,EAAE,CAAC,GAAG,EAAE,EAAE,IAAI,EAAE,MAAM,EAAE,CAAC,EAAE,EAAE;IAC/B,IAAI,CAAC,GAAG,CAAC,MAAM,CAAC,EAAE;QAChB,GAAG,CAAC,MAAM,CAAC,GAAG,EAAE,CAAC;KAClB;IACD,GAAG,CAAC,MAAM,CAAC,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IACtB,OAAO,GAAG,CAAC;AACb,CAAC,EACD,EAAgC,CACjC,CAAC;AAEF;;;;;;;;;GASG;AACI,KAAK,UAAU,QAAQ,CAC5B,GAAW,EACX,OAAiB,EACjB,OAAiB,EACjB,WAAuB,EACvB,MAAc;IAEd,MAAM,MAAM,GAAG,MAAM,IAAI,wBAAM,CAAC;QAC9B,GAAG;QACH,OAAO,EAAE,CAAC,IAAI,CAAC,CAAC,MAAM,CAAC,OAAO,IAAI,EAAE,CAAC;QACrC,OAAO;QACP,iBAAiB,EAAE,WAAW,CAAC,OAAO,CAAC,CAAC,IAAI,EAAE,EAAE,CAAC,cAAc,CAAC,IAAI,CAAC,CAAC;KACvE,CAAC,CAAC,QAAQ,EAAE,CAAC;IAEd,uDAAuD;IACvD,uDAAuD;IACvD,2DAA2D;IAC3D,MAAM,UAAU,GAAG,MAAM,CAAC,OAAO,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,MAAM,CACxD,CAAC,GAAG,EAAE,CAAC,QAAQ,EAAE,EAAE,IAAI,EAAE,CAAC,EAAE,EAAE;QAC5B,MAAM,eAAe,GAAG,iBAAiB,CAAC,QAAQ,CAAC,CAAC;QACpD,IAAI,eAAe,IAAI,WAAW,CAAC,QAAQ,CAAC,eAAe,CAAC,IAAI,CAAC,EAAE;YACjE,GAAG,CAAC,eAAe,CAAC,MAAM,CAAC,GAAG,IAAI,GAAG,CAAC,GAAG,CAAC,eAAe,CAAC,MAAM,CAAC,IAAI,CAAC,CAAC,CAAC;SACzE;QACD,OAAO,GAAG,CAAC;IACb,CAAC,EACD,EAAgC,CACjC,CAAC;IAEF,IAAI,MAAM,CAAC,IAAI,CAAC,UAAU,CAAC,CAAC,MAAM,EAAE;QAClC,MAAM,CAAC,KAAK,CAAC,sBAAsB,CAAC,CAAC;QACrC,KAAK,MAAM,CAAC,QAAQ,EAAE,KAAK,CAAC,IAAI,MAAM,CAAC,OAAO,CAAC,UAAU,CAAC,EAAE;YAC1D,MAAM,CAAC,KAAK,CAAC,KAAK,QAAQ,KAAK,KAAK,EAAE,CAAC,CAAC;SACzC;KACF;SAAM;QACL,MAAM,CAAC,IAAI,CACT,4EAA4E;YAC1E,0EAA0E;YAC1E,sEAAsE;YACtE,4EAA4E;YAC5E,iEAAiE;YACjE,wEAAwE;YACxE,gFAAgF;YAChF,yBAAyB,CAC5B,CAAC;KACH;IAED,OAAO,UAAU,CAAC;AACpB,CAAC;AA/CD,4BA+CC"}
\ No newline at end of file
+{"version":3,"file":"count-loc.js","sourceRoot":"","sources":["../src/count-loc.ts"],"names":[],"mappings":";;AAAA,qDAAyC;AAEzC,2CAAuC;AAEvC,iCAAqC;AAKrC,sFAAsF;AACtF,MAAM,iBAAiB,GAA6B;IAClD,CAAC,EAAE,oBAAQ,CAAC,GAAG;IACf,KAAK,EAAE,oBAAQ,CAAC,GAAG;IACnB,IAAI,EAAE,oBAAQ,CAAC,MAAM;IACrB,EAAE,EAAE,oBAAQ,CAAC,EAAE;IACf,IAAI,EAAE,oBAAQ,CAAC,IAAI;IACnB,UAAU,EAAE,oBAAQ,CAAC,UAAU;IAC/B,MAAM,EAAE,oBAAQ,CAAC,MAAM;IACvB,UAAU,EAAE,oBAAQ,CAAC,UAAU;CAChC,CAAC;AAEF,MAAM,cAAc,GAAG,MAAM,CAAC,OAAO,CAAC,iBAAiB,CAAC,CAAC,MAAM,CAC7D,CAAC,GAAG,EAAE,CAAC,GAAG,EAAE,IAAI,CAAC,EAAE,EAAE;IACnB,IAAI,CAAC,GAAG,CAAC,IAAI,CAAC,EAAE;QACd,GAAG,CAAC,IAAI,CAAC,GAAG,EAAE,CAAC;KAChB;IACD,GAAG,CAAC,IAAI,CAAC,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IACpB,OAAO,GAAG,CAAC;AACb,CAAC,EACD,EAAgC,CACjC,CAAC;AAEF,SAAgB,WAAW,CAAC,QAAkB;IAC5C,QAAQ,QAAQ,EAAE;QAChB,KAAK,oBAAQ,CAAC,GAAG;YACf,OAAO,KAAK,CAAC;QACf,KAAK,oBAAQ,CAAC,MAAM;YAClB,OAAO,IAAI,CAAC;QACd,KAAK,oBAAQ,CAAC,EAAE;YACd,OAAO,IAAI,CAAC;QACd,KAAK,oBAAQ,CAAC,IAAI;YAChB,OAAO,MAAM,CAAC;QAChB,KAAK,oBAAQ,CAAC,UAAU;YACtB,OAAO,IAAI,CAAC;QACd,KAAK,oBAAQ,CAAC,MAAM;YAClB,OAAO,IAAI,CAAC;QAEd;YACE,kBAAW,CAAC,QAAQ,CAAC,CAAC;KACzB;AACH,CAAC;AAlBD,kCAkBC;AAED;;;;;;;;;GASG;AACI,KAAK,UAAU,QAAQ,CAC5B,GAAW,EACX,OAAiB,EACjB,OAAiB,EACjB,WAAuB,EACvB,MAAc;IAEd,MAAM,MAAM,GAAG,MAAM,IAAI,wBAAM,CAAC;QAC9B,GAAG;QACH,OAAO,EAAE,KAAK,CAAC,OAAO,CAAC,OAAO,CAAC,IAAI,OAAO,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC;QACxE,OAAO;QACP,iBAAiB,EAAE,WAAW,CAAC,OAAO,CAAC,CAAC,IAAI,EAAE,EAAE,CAAC,cAAc,CAAC,IAAI,CAAC,CAAC;KACvE,CAAC,CAAC,QAAQ,EAAE,CAAC;IAEd,uDAAuD;IACvD,uDAAuD;IACvD,2DAA2D;IAC3D,MAAM,UAAU,GAAG,MAAM,CAAC,OAAO,CAAC,MAAM,CAAC,SAAS,CAAC,CAAC,MAAM,CACxD,CAAC,GAAG,EAAE,CAAC,QAAQ,EAAE,EAAE,IAAI,EAAE,CAAC,EAAE,EAAE;QAC5B,MAAM,eAAe,GAAG,iBAAiB,CAAC,QAAQ,CAAC,CAAC;QACpD,IAAI,eAAe,IAAI,WAAW,CAAC,QAAQ,CAAC,eAAe,CAAC,EAAE;YAC5D,GAAG,CAAC,eAAe,CAAC,GAAG,IAAI,GAAG,CAAC,GAAG,CAAC,eAAe,CAAC,IAAI,CAAC,CAAC,CAAC;SAC3D;QACD,OAAO,GAAG,CAAC;IACb,CAAC,EACD,EAA8B,CAC/B,CAAC;IAEF,IAAI,MAAM,CAAC,IAAI,CAAC,UAAU,CAAC,CAAC,MAAM,EAAE;QAClC,MAAM,CAAC,KAAK,CAAC,sBAAsB,CAAC,CAAC;QACrC,KAAK,MAAM,CAAC,QAAQ,EAAE,KAAK,CAAC,IAAI,MAAM,CAAC,OAAO,CAAC,UAAU,CAAC,EAAE;YAC1D,MAAM,CAAC,KAAK,CAAC,KAAK,QAAQ,KAAK,KAAK,EAAE,CAAC,CAAC;SACzC;KACF;SAAM;QACL,MAAM,CAAC,IAAI,CACT,4EAA4E;YAC1E,0EAA0E;YAC1E,sEAAsE;YACtE,4EAA4E;YAC5E,iEAAiE;YACjE,wEAAwE;YACxE,gFAAgF;YAChF,yBAAyB,CAC5B,CAAC;KACH;IAED,OAAO,UAAU,CAAC;AACpB,CAAC;AA/CD,4BA+CC"}
\ No newline at end of file
diff --git a/lib/count-loc.test.js b/lib/count-loc.test.js
index 671a8d063..cec4bc30d 100644
--- a/lib/count-loc.test.js
+++ b/lib/count-loc.test.js
@@ -21,14 +21,14 @@ ava_1.default("ensure lines of code works for cpp and js", async (t) => {
     const results = await count_loc_1.countLoc(path.join(__dirname, "../tests/multi-language-repo"), [], [], [languages_1.Language.cpp, languages_1.Language.javascript], logging_1.getRunnerLogger(true));
     t.deepEqual(results, {
         cpp: 6,
-        js: 3,
+        javascript: 3,
     });
 });
 ava_1.default("ensure lines of code can handle undefined language", async (t) => {
     const results = await count_loc_1.countLoc(path.join(__dirname, "../tests/multi-language-repo"), [], [], [languages_1.Language.javascript, languages_1.Language.python, "hucairz"], logging_1.getRunnerLogger(true));
     t.deepEqual(results, {
-        js: 3,
-        py: 5,
+        javascript: 3,
+        python: 5,
     });
 });
 ava_1.default("ensure lines of code can handle empty languages", async (t) => {
@@ -40,13 +40,21 @@ ava_1.default("ensure lines of code can handle includes", async (t) => {
     // directories outside the normal structure.
     const results = await count_loc_1.countLoc(path.join(__dirname, "../tests/multi-language-repo"), ["../../src/testdata"], [], [languages_1.Language.javascript], logging_1.getRunnerLogger(true));
     t.deepEqual(results, {
-        js: 15,
+        javascript: 12,
+    });
+});
+ava_1.default("ensure lines of code can handle empty includes", async (t) => {
+    // note that "**" is always included. The includes are for extra
+    // directories outside the normal structure.
+    const results = await count_loc_1.countLoc(path.join(__dirname, "../tests/multi-language-repo"), ["idontexist"], [], [languages_1.Language.javascript], logging_1.getRunnerLogger(true));
+    t.deepEqual(results, {
+    // should get no results
     });
 });
 ava_1.default("ensure lines of code can handle exclude", async (t) => {
     const results = await count_loc_1.countLoc(path.join(__dirname, "../tests/multi-language-repo"), [], ["**/*.py"], [languages_1.Language.javascript, languages_1.Language.python], logging_1.getRunnerLogger(true));
     t.deepEqual(results, {
-        js: 3,
+        javascript: 3,
     });
 });
 //# sourceMappingURL=count-loc.test.js.map
\ No newline at end of file
diff --git a/lib/count-loc.test.js.map b/lib/count-loc.test.js.map
index c898aaa95..5dab456a3 100644
--- a/lib/count-loc.test.js.map
+++ b/lib/count-loc.test.js.map
@@ -1 +1 @@
-{"version":3,"file":"count-loc.test.js","sourceRoot":"","sources":["../src/count-loc.test.ts"],"names":[],"mappings":";;;;;;;;;;;;AAAA,2CAA6B;AAE7B,8CAAuB;AAEvB,2CAAuC;AACvC,2CAAuC;AACvC,uCAA4C;AAC5C,mDAA6C;AAE7C,0BAAU,CAAC,aAAI,CAAC,CAAC;AAEjB,aAAI,CAAC,2CAA2C,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC5D,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,CAAC,oBAAQ,CAAC,GAAG,EAAE,oBAAQ,CAAC,UAAU,CAAC,EACnC,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,GAAG,EAAE,CAAC;QACN,EAAE,EAAE,CAAC;KACN,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,oDAAoD,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IACrE,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,CAAC,oBAAQ,CAAC,UAAU,EAAE,oBAAQ,CAAC,MAAM,EAAE,SAAqB,CAAC,EAC7D,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,EAAE,EAAE,CAAC;QACL,EAAE,EAAE,CAAC;KACN,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,iDAAiD,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAClE,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,EAAE,EACF,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE,EAAE,CAAC,CAAC;AAC3B,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,0CAA0C,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC3D,gEAAgE;IAChE,4CAA4C;IAC5C,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,CAAC,oBAAoB,CAAC,EACtB,EAAE,EACF,CAAC,oBAAQ,CAAC,UAAU,CAAC,EACrB,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,EAAE,EAAE,EAAE;KACP,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,yCAAyC,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC1D,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,CAAC,SAAS,CAAC,EACX,CAAC,oBAAQ,CAAC,UAAU,EAAE,oBAAQ,CAAC,MAAM,CAAC,EACtC,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,EAAE,EAAE,CAAC;KACN,CAAC,CAAC;AACL,CAAC,CAAC,CAAC"}
\ No newline at end of file
+{"version":3,"file":"count-loc.test.js","sourceRoot":"","sources":["../src/count-loc.test.ts"],"names":[],"mappings":";;;;;;;;;;;;AAAA,2CAA6B;AAE7B,8CAAuB;AAEvB,2CAAuC;AACvC,2CAAuC;AACvC,uCAA4C;AAC5C,mDAA6C;AAE7C,0BAAU,CAAC,aAAI,CAAC,CAAC;AAEjB,aAAI,CAAC,2CAA2C,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC5D,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,CAAC,oBAAQ,CAAC,GAAG,EAAE,oBAAQ,CAAC,UAAU,CAAC,EACnC,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,GAAG,EAAE,CAAC;QACN,UAAU,EAAE,CAAC;KACd,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,oDAAoD,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IACrE,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,CAAC,oBAAQ,CAAC,UAAU,EAAE,oBAAQ,CAAC,MAAM,EAAE,SAAqB,CAAC,EAC7D,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,UAAU,EAAE,CAAC;QACb,MAAM,EAAE,CAAC;KACV,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,iDAAiD,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAClE,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,EAAE,EACF,EAAE,EACF,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE,EAAE,CAAC,CAAC;AAC3B,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,0CAA0C,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC3D,gEAAgE;IAChE,4CAA4C;IAC5C,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,CAAC,oBAAoB,CAAC,EACtB,EAAE,EACF,CAAC,oBAAQ,CAAC,UAAU,CAAC,EACrB,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,UAAU,EAAE,EAAE;KACf,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,gDAAgD,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IACjE,gEAAgE;IAChE,4CAA4C;IAC5C,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,CAAC,YAAY,CAAC,EACd,EAAE,EACF,CAAC,oBAAQ,CAAC,UAAU,CAAC,EACrB,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;IACnB,wBAAwB;KACzB,CAAC,CAAC;AACL,CAAC,CAAC,CAAC;AAEH,aAAI,CAAC,yCAAyC,EAAE,KAAK,EAAE,CAAC,EAAE,EAAE;IAC1D,MAAM,OAAO,GAAG,MAAM,oBAAQ,CAC5B,IAAI,CAAC,IAAI,CAAC,SAAS,EAAE,8BAA8B,CAAC,EACpD,EAAE,EACF,CAAC,SAAS,CAAC,EACX,CAAC,oBAAQ,CAAC,UAAU,EAAE,oBAAQ,CAAC,MAAM,CAAC,EACtC,yBAAe,CAAC,IAAI,CAAC,CACtB,CAAC;IAEF,CAAC,CAAC,SAAS,CAAC,OAAO,EAAE;QACnB,UAAU,EAAE,CAAC;KACd,CAAC,CAAC;AACL,CAAC,CAAC,CAAC"}
\ No newline at end of file
diff --git a/lib/util.js b/lib/util.js
index 0a8451ead..c410bc95b 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -320,4 +320,21 @@ async function getGitHubAuth(logger, githubAuth, fromStdIn, readable = process.s
     throw new Error("No GitHub authentication token was specified. Please provide a token via the GITHUB_TOKEN environment variable, or by adding the `--github-auth-stdin` flag and passing the token via standard input.");
 }
 exports.getGitHubAuth = getGitHubAuth;
+/**
+ * This error is used to indicate a runtime failure of an exhaustivity check enforced at compile time.
+ */
+class ExhaustivityCheckingError extends Error {
+    constructor(expectedExhaustiveValue) {
+        super("Internal error: exhaustivity checking failure");
+        this.expectedExhaustiveValue = expectedExhaustiveValue;
+    }
+}
+/**
+ * Used to perform compile-time exhaustivity checking on a value.  This function will not be executed at runtime unless
+ * the type system has been subverted.
+ */
+function assertNever(value) {
+    throw new ExhaustivityCheckingError(value);
+}
+exports.assertNever = assertNever;
 //# sourceMappingURL=util.js.map
\ No newline at end of file
diff --git a/lib/util.js.map b/lib/util.js.map
index 3d31c1262..5dd1bbe46 100644
--- a/lib/util.js.map
+++ b/lib/util.js.map
@@ -1 +1 @@
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diff --git a/node_modules/.package-lock.json b/node_modules/.package-lock.json
index e75fc0d0e..16785c20a 100644
--- a/node_modules/.package-lock.json
+++ b/node_modules/.package-lock.json
@@ -2724,9 +2724,9 @@
       }
     },
     "node_modules/github-linguist": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.0.tgz",
-      "integrity": "sha512-ptcazYKsXvCHXgCctZ7iFMq91KFGLgOsOOpB2O/+CYpxYyiSC+EguuDgyjr8o+h2BW8+foUutKV8lL4s97QBBw==",
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.2.tgz",
+      "integrity": "sha512-NqA5A18nwVH/qXnqcxiauhDSNwPe0jeUjjlNDYgSi6MdAOVnRI8/569Kz0Wc3/pLl8W8H6M5VPSnVwKvFevkDg==",
       "dependencies": {
         "chalk": "^2.2.0",
         "commander": "^2.11.0",
diff --git a/node_modules/github-linguist/dist/directory.js b/node_modules/github-linguist/dist/directory.js
index d6c0f0eb1..b5d8a2f97 100644
--- a/node_modules/github-linguist/dist/directory.js
+++ b/node_modules/github-linguist/dist/directory.js
@@ -157,13 +157,15 @@ class LocDir {
         const files = [];
         const info = { ...defaultInfo };
         let languages = {};
-        await Promise.all(paths.map(async (pathItem) => {
+        // We _could_ use Promise.all to count the files in parallel, but that
+        // would lead to out of memory errors when there are many files.
+        for (const pathItem of paths) {
             const fullPath = slash2_1.default(path_1.default.join(this.cwd, pathItem));
             if (!pathItem ||
                 this.ignoreLanguage(pathItem) ||
                 !(await fs_extra_1.default.pathExists(fullPath)) ||
                 (await fs_extra_1.default.stat(fullPath)).isDirectory()) {
-                return;
+                continue;
             }
             const file = new file_1.LocFile(fullPath);
             const fileLineInfo = await file.getFileInfo();
@@ -181,7 +183,7 @@ class LocDir {
                 [fileLineInfo.languages]: language,
             };
             files.push(fullPath);
-        }));
+        }
         return {
             files,
             info,
diff --git a/node_modules/github-linguist/dist/directory.js.map b/node_modules/github-linguist/dist/directory.js.map
index 7d6924f8d..6f242963e 100644
--- a/node_modules/github-linguist/dist/directory.js.map
+++ b/node_modules/github-linguist/dist/directory.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"directory.js","sourceRoot":"","sources":["../src/directory.ts"],"names":[],"mappings":";;;;;;AAAA,oDAA4B;AAC5B,wDAA0B;AAC1B,gDAAwB;AACxB,aAAa;AACb,oDAA2B;AAE3B,iCAA2C;AAC3C,2CAAwC;AAExC,MAAM,WAAW,GAAa;IAC5B,KAAK,EAAE,CAAC;IACR,IAAI,EAAE,CAAC;IACP,OAAO,EAAE,CAAC;CACX,CAAC;AAmBF,MAAM,cAAc,GAAG;IACrB,aAAa;IACb,UAAU;IACV,WAAW;IACX,YAAY;IACZ,oBAAoB;IACpB,YAAY;IACZ,WAAW;IAEX,OAAO;IACP,WAAW;IACX,YAAY;IACZ,QAAQ;IACR,QAAQ;IACR,UAAU;IAEV,SAAS;IACT,UAAU;IACV,UAAU;IAEV,QAAQ;IACR,UAAU;IACV,SAAS;IAET,SAAS;IACT,UAAU;IACV,UAAU;IACV,WAAW;IACX,UAAU;IACV,UAAU;IACV,UAAU;IACV,WAAW;IACX,WAAW;IACX,UAAU;IACV,SAAS;IACT,SAAS;IACT,UAAU;IAEV,QAAQ;IACR,UAAU;IACV,UAAU;IACV,WAAW;IACX,YAAY;IACZ,UAAU;IACV,UAAU;IAEV,QAAQ;IACR,UAAU;IACV,UAAU;IACV,UAAU;IACV,WAAW;IACX,UAAU;IACV,UAAU;IACV,WAAW;IAEX,QAAQ;IACR,UAAU;IACV,UAAU;IACV,UAAU;IACV,UAAU;IACV,UAAU;IACV,UAAU;IACV,WAAW;IACX,UAAU;IACV,UAAU;IAEV,SAAS;IACT,UAAU;IACV,WAAW;IACX,WAAW;IACX,UAAU;IACV,WAAW;IACX,UAAU;IACV,WAAW;IAEX,YAAY;IACZ,UAAU;IACV,WAAW;IACX,WAAW;IAEX,WAAW;IACX,UAAU;IACV,UAAU;IACV,SAAS;IACT,UAAU;IACV,SAAS;IACT,UAAU;IACV,SAAS;IACT,UAAU;IACV,UAAU;CACX,CAAC;AAEF;;GAEG;AACH,MAAa,MAAM;IAOjB,YAAY,OAAsB;QANlC;;;;;WAAoB;QACpB;;;;;WAA0B;QAC1B;;;;;WAA0B;QAC1B;;;;;WAAqC;QACrC;;;;mBAAuB,IAAI,qBAAS,EAAE;WAAC;QAIrC,yEAAyE;QACzE,4EAA4E;QAC5E,IAAI,CAAC,OAAO,GAAG,WAAW,CAAC,OAAO,CAAC,OAAO,CAAC;aACxC,MAAM,CAAC,cAAc,CAAC;aACtB,GAAG,CAAC,IAAI,CAAC,EAAE,CAAC,IAAI,CAAC,QAAQ,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,GAAG,IAAI,KAAK,CAAC,CAAC;QAE1D,uEAAuE;QACvE,YAAY;QACZ,IAAI,CAAC,OAAO,GAAG,WAAW,CAAC,OAAO,CAAC,OAAO,EAAE,IAAI,CAAC;aAC9C,GAAG,CAAC,IAAI,CAAC,EAAE,CAAC,IAAI,CAAC,UAAU,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC;aAC7D,GAAG,CAAC,IAAI,CAAC,EAAE,CAAC,IAAI,CAAC,QAAQ,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,GAAG,IAAI,KAAK,CAAC,CAAC;QAC1D,IAAI,CAAC,GAAG,GAAG,OAAO,CAAC,GAAG,IAAI,OAAO,CAAC,GAAG,EAAE,CAAC;QACxC,IAAI,CAAC,iBAAiB,GAAG,OAAO,CAAC,iBAAiB,CAAC;IACrD,CAAC;IAED;;OAEG;IACH,KAAK,CAAC,QAAQ;QACZ,MAAM,KAAK,GAAG,MAAM,gBAAM,CAAC,IAAI,CAAC,OAAO,EAAE;YACvC,GAAG,EAAE,IAAI,CAAC,GAAG;YACb,MAAM,EAAE,IAAI,CAAC,OAAO;YACpB,KAAK,EAAE,IAAI;SACZ,CAAC,CAAC;QACH,MAAM,KAAK,GAAa,EAAE,CAAC;QAC3B,MAAM,IAAI,GAAa,EAAE,GAAG,WAAW,EAAE,CAAC;QAC1C,IAAI,SAAS,GAIT,EAAE,CAAC;QAEP,sEAAsE;QACtE,gEAAgE;QAChE,KAAK,MAAM,QAAQ,IAAI,KAAK,EAAE;YAC5B,MAAM,QAAQ,GAAG,gBAAK,CAAC,cAAI,CAAC,IAAI,CAAC,IAAI,CAAC,GAAG,EAAE,QAAQ,CAAC,CAAC,CAAC;YACtD,IACE,CAAC,QAAQ;gBACT,IAAI,CAAC,cAAc,CAAC,QAAQ,CAAC;gBAC7B,CAAC,CAAC,MAAM,kBAAE,CAAC,UAAU,CAAC,QAAQ,CAAC,CAAC;gBAChC,CAAC,MAAM,kBAAE,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC,CAAC,WAAW,EAAE,EACvC;gBACA,SAAS;aACV;YACD,MAAM,IAAI,GAAG,IAAI,cAAO,CAAC,QAAQ,CAAC,CAAC;YACnC,MAAM,YAAY,GAAG,MAAM,IAAI,CAAC,WAAW,EAAE,CAAC;YAC9C,MAAM,EAAE,KAAK,EAAE,GAAG,YAAY,CAAC;YAC/B,IAAI,CAAC,KAAK,IAAI,KAAK,CAAC,KAAK,CAAC;YAC1B,IAAI,CAAC,IAAI,IAAI,KAAK,CAAC,IAAI,CAAC;YACxB,IAAI,CAAC,OAAO,IAAI,KAAK,CAAC,OAAO,CAAC;YAC9B,MAAM,QAAQ,GAAG,EAAE,GAAG,SAAS,CAAC,YAAY,CAAC,SAAS,CAAC,EAAE,CAAC;YAC1D,QAAQ,CAAC,IAAI,GAAG,KAAK,CAAC,IAAI,GAAG,CAAC,QAAQ,CAAC,IAAI,IAAI,CAAC,CAAC,CAAC;YAClD,QAAQ,CAAC,GAAG,GAAG,CAAC,QAAQ,CAAC,GAAG,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC;YACvC,QAAQ,CAAC,OAAO,GAAG,KAAK,CAAC,OAAO,GAAG,CAAC,QAAQ,CAAC,OAAO,IAAI,CAAC,CAAC,CAAC;YAC3D,QAAQ,CAAC,KAAK,GAAG,KAAK,CAAC,KAAK,GAAG,CAAC,QAAQ,CAAC,KAAK,IAAI,CAAC,CAAC,CAAC;YACrD,SAAS,GAAG;gBACV,GAAG,SAAS;gBACZ,CAAC,YAAY,CAAC,SAAS,CAAC,EAAE,QAAQ;aACnC,CAAC;YACF,KAAK,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC;SACtB;QAED,OAAO;YACL,KAAK;YACL,IAAI;YACJ,SAAS;SACV,CAAC;IACJ,CAAC;IAED;;;OAGG;IACK,cAAc,CAAC,QAAgB;QACrC,OAAO,IAAI,CAAC,iBAAiB,IAAI,CAAC,IAAI,CAAC,iBAAiB,CAAC,QAAQ,CAAC,IAAI,CAAC,YAAY,CAAC,OAAO,CAAC,QAAQ,CAAC,CAAC,CAAC;IACzG,CAAC;CACF;AArFD,wBAqFC;AAED,SAAS,WAAW,CAAC,GAAuB,EAAE,MAAe;IAC3D,IAAI,CAAC,GAAG,EAAE;QACR,OAAO,MAAM,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,EAAE,CAAC;KAC/B;IACD,OAAO,KAAK,CAAC,OAAO,CAAC,GAAG,CAAC;QACvB,CAAC,CAAC,GAAG;QACL,CAAC,CAAC,CAAC,GAAG,CAAC,CAAC;AACZ,CAAC"}
\ No newline at end of file
diff --git a/node_modules/github-linguist/package.json b/node_modules/github-linguist/package.json
index d3131433c..a98fbbc02 100644
--- a/node_modules/github-linguist/package.json
+++ b/node_modules/github-linguist/package.json
@@ -1,6 +1,6 @@
 {
   "name": "github-linguist",
-  "version": "2.4.0",
+  "version": "2.4.2",
   "description": "A tool to count lines of code in a repository powered by github-linguist langauge mappings.",
   "keywords": [
     "loc",
diff --git a/node_modules/github-linguist/src/directory.ts b/node_modules/github-linguist/src/directory.ts
index c17c94934..3385c1a9d 100644
--- a/node_modules/github-linguist/src/directory.ts
+++ b/node_modules/github-linguist/src/directory.ts
@@ -166,7 +166,9 @@ export class LocDir {
       };
     } = {};
 
-    await Promise.all(paths.map(async (pathItem) => {
+    // We _could_ use Promise.all to count the files in parallel, but that
+    // would lead to out of memory errors when there are many files.
+    for (const pathItem of paths) {
       const fullPath = slash(path.join(this.cwd, pathItem));
       if (
         !pathItem ||
@@ -174,7 +176,7 @@ export class LocDir {
         !(await fs.pathExists(fullPath)) ||
         (await fs.stat(fullPath)).isDirectory()
       ) {
-        return;
+        continue;
       }
       const file = new LocFile(fullPath);
       const fileLineInfo = await file.getFileInfo();
@@ -192,7 +194,7 @@ export class LocDir {
         [fileLineInfo.languages]: language,
       };
       files.push(fullPath);
-    }));
+    }
 
     return {
       files,
diff --git a/package-lock.json b/package-lock.json
index f59488353..7f9bb26dc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -23,7 +23,7 @@
         "fast-deep-equal": "^3.1.3",
         "file-url": "^3.0.0",
         "fs": "0.0.1-security",
-        "github-linguist": "^2.4.0",
+        "github-linguist": "^2.4.2",
         "js-yaml": "^3.13.1",
         "jsonschema": "1.2.6",
         "long": "^4.0.0",
@@ -2776,9 +2776,9 @@
       }
     },
     "node_modules/github-linguist": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.0.tgz",
-      "integrity": "sha512-ptcazYKsXvCHXgCctZ7iFMq91KFGLgOsOOpB2O/+CYpxYyiSC+EguuDgyjr8o+h2BW8+foUutKV8lL4s97QBBw==",
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.2.tgz",
+      "integrity": "sha512-NqA5A18nwVH/qXnqcxiauhDSNwPe0jeUjjlNDYgSi6MdAOVnRI8/569Kz0Wc3/pLl8W8H6M5VPSnVwKvFevkDg==",
       "dependencies": {
         "chalk": "^2.2.0",
         "commander": "^2.11.0",
@@ -8017,9 +8017,9 @@
       }
     },
     "github-linguist": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.0.tgz",
-      "integrity": "sha512-ptcazYKsXvCHXgCctZ7iFMq91KFGLgOsOOpB2O/+CYpxYyiSC+EguuDgyjr8o+h2BW8+foUutKV8lL4s97QBBw==",
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/github-linguist/-/github-linguist-2.4.2.tgz",
+      "integrity": "sha512-NqA5A18nwVH/qXnqcxiauhDSNwPe0jeUjjlNDYgSi6MdAOVnRI8/569Kz0Wc3/pLl8W8H6M5VPSnVwKvFevkDg==",
       "requires": {
         "chalk": "^2.2.0",
         "commander": "^2.11.0",
diff --git a/package.json b/package.json
index 6524195d3..30803cae5 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "fast-deep-equal": "^3.1.3",
     "file-url": "^3.0.0",
     "fs": "0.0.1-security",
-    "github-linguist": "^2.4.0",
+    "github-linguist": "^2.4.2",
     "js-yaml": "^3.13.1",
     "jsonschema": "1.2.6",
     "long": "^4.0.0",
diff --git a/src/analyze.test.ts b/src/analyze.test.ts
index 82b7cbbe7..91cc25cbc 100644
--- a/src/analyze.test.ts
+++ b/src/analyze.test.ts
@@ -7,6 +7,7 @@ import sinon from "sinon";
 import { runQueries } from "./analyze";
 import { setCodeQL } from "./codeql";
 import { Config } from "./config-utils";
+import { getIdPrefix } from "./count-loc";
 import * as count from "./count-loc";
 import { Language } from "./languages";
 import { getRunnerLogger } from "./logging";
@@ -19,7 +20,7 @@ setupTests(test);
 // and correct case of builtin or custom. Also checks the correct search
 // paths are set in the database analyze invocation.
 test("status report fields and search path setting", async (t) => {
-  const mockLinesOfCode = Object.entries(Language).reduce((obj, [lang], i) => {
+  const mockLinesOfCode = Object.values(Language).reduce((obj, lang, i) => {
     // use a different line count for each language
     obj[lang] = i + 1;
     return obj;
@@ -49,7 +50,9 @@ test("status report fields and search path setting", async (t) => {
                   properties: {
                     metricResults: [
                       {
-                        ruleId: `${language}/summary/lines-of-code`,
+                        ruleId: `${getIdPrefix(
+                          language
+                        )}/summary/lines-of-code`,
                         value: 123,
                       },
                     ],
@@ -61,7 +64,7 @@ test("status report fields and search path setting", async (t) => {
                     metricResults: [
                       {
                         rule: {
-                          id: `${language}/summary/lines-of-code`,
+                          id: `${getIdPrefix(language)}/summary/lines-of-code`,
                         },
                         value: 123,
                       },
@@ -148,12 +151,12 @@ test("status report fields and search path setting", async (t) => {
     // eslint-disable-next-line github/array-foreach
     Object.keys(Language).forEach((lang, i) => {
       verifyLineCountForFile(
-        lang,
+        lang as Language,
         path.join(tmpDir, `${lang}-builtin.sarif`),
         i + 1
       );
       verifyLineCountForFile(
-        lang,
+        lang as Language,
         path.join(tmpDir, `${lang}-custom.sarif`),
         i + 1
       );
@@ -161,14 +164,15 @@ test("status report fields and search path setting", async (t) => {
   }
 
   function verifyLineCountForFile(
-    lang: string,
+    lang: Language,
     filePath: string,
     lineCount: number
   ) {
+    const idPrefix = getIdPrefix(lang);
     const sarif = JSON.parse(fs.readFileSync(filePath, "utf8"));
     t.deepEqual(sarif.runs[0].properties.metricResults, [
       {
-        ruleId: `${lang}/summary/lines-of-code`,
+        ruleId: `${idPrefix}/summary/lines-of-code`,
         value: 123,
         baseline: lineCount,
       },
@@ -176,7 +180,7 @@ test("status report fields and search path setting", async (t) => {
     t.deepEqual(sarif.runs[1].properties.metricResults, [
       {
         rule: {
-          id: `${lang}/summary/lines-of-code`,
+          id: `${idPrefix}/summary/lines-of-code`,
         },
         value: 123,
         baseline: lineCount,
diff --git a/src/analyze.ts b/src/analyze.ts
index 3f317f68c..9911f5527 100644
--- a/src/analyze.ts
+++ b/src/analyze.ts
@@ -6,7 +6,7 @@ import * as toolrunner from "@actions/exec/lib/toolrunner";
 import * as analysisPaths from "./analysis-paths";
 import { getCodeQL } from "./codeql";
 import * as configUtils from "./config-utils";
-import { IdPrefixes, countLoc } from "./count-loc";
+import { countLoc, getIdPrefix } from "./count-loc";
 import { isScannedLanguage, Language } from "./languages";
 import { Logger } from "./logging";
 import * as sharedEnv from "./shared-environment";
@@ -206,6 +206,8 @@ export async function runQueries(
         statusReport[`analyze_custom_queries_${language}_duration_ms`] =
           new Date().getTime() - startTimeCustom;
       }
+
+      printLinesOfCodeSummary(logger, language, await locPromise);
     } catch (e) {
       logger.info(e);
       statusReport.analyze_failure_language = language;
@@ -291,15 +293,16 @@ export async function runAnalyze(
 
 async function injectLinesOfCode(
   sarifFile: string,
-  language: string,
-  locPromise: Promise<Partial<Record<IdPrefixes, number>>>
+  language: Language,
+  locPromise: Promise<Partial<Record<Language, number>>>
 ) {
   const lineCounts = await locPromise;
+  const idPrefix = getIdPrefix(language);
   if (language in lineCounts) {
     const sarif = JSON.parse(fs.readFileSync(sarifFile, "utf8"));
     if (Array.isArray(sarif.runs)) {
       for (const run of sarif.runs) {
-        const ruleId = `${language}/summary/lines-of-code`;
+        const ruleId = `${idPrefix}/summary/lines-of-code`;
         run.properties = run.properties || {};
         run.properties.metricResults = run.properties.metricResults || [];
         const rule = run.properties.metricResults.find(
@@ -315,3 +318,15 @@ async function injectLinesOfCode(
     fs.writeFileSync(sarifFile, JSON.stringify(sarif));
   }
 }
+
+function printLinesOfCodeSummary(
+  logger: Logger,
+  language: Language,
+  lineCounts: Partial<Record<Language, number>>
+) {
+  if (language in lineCounts) {
+    logger.info(
+      `Counted ${lineCounts[language]} lines of code for ${language} as a baseline.`
+    );
+  }
+}
diff --git a/src/count-loc.test.ts b/src/count-loc.test.ts
index 82ea31cc2..0cf1d54c2 100644
--- a/src/count-loc.test.ts
+++ b/src/count-loc.test.ts
@@ -20,7 +20,7 @@ test("ensure lines of code works for cpp and js", async (t) => {
 
   t.deepEqual(results, {
     cpp: 6,
-    js: 3,
+    javascript: 3,
   });
 });
 
@@ -34,8 +34,8 @@ test("ensure lines of code can handle undefined language", async (t) => {
   );
 
   t.deepEqual(results, {
-    js: 3,
-    py: 5,
+    javascript: 3,
+    python: 5,
   });
 });
 
@@ -63,7 +63,23 @@ test("ensure lines of code can handle includes", async (t) => {
   );
 
   t.deepEqual(results, {
-    js: 15,
+    javascript: 12,
+  });
+});
+
+test("ensure lines of code can handle empty includes", async (t) => {
+  // note that "**" is always included. The includes are for extra
+  // directories outside the normal structure.
+  const results = await countLoc(
+    path.join(__dirname, "../tests/multi-language-repo"),
+    ["idontexist"],
+    [],
+    [Language.javascript],
+    getRunnerLogger(true)
+  );
+
+  t.deepEqual(results, {
+    // should get no results
   });
 });
 
@@ -77,6 +93,6 @@ test("ensure lines of code can handle exclude", async (t) => {
   );
 
   t.deepEqual(results, {
-    js: 3,
+    javascript: 3,
   });
 });
diff --git a/src/count-loc.ts b/src/count-loc.ts
index 00b453dea..61a441678 100644
--- a/src/count-loc.ts
+++ b/src/count-loc.ts
@@ -2,60 +2,54 @@ import { LocDir } from "github-linguist";
 
 import { Language } from "./languages";
 import { Logger } from "./logging";
+import { assertNever } from "./util";
 
 // Language IDs used by codeql when specifying its metrics.
-export type IdPrefixes = "cpp" | "cs" | "go" | "java" | "js" | "py" | "rb";
+export type IdPrefix = "cpp" | "cs" | "go" | "java" | "js" | "py" | "rb";
 
 // Map from linguist language names to language prefixes used in the action and codeql
-const linguistToMetrics: Record<
-  string,
-  { name: Language; prefix: IdPrefixes }
-> = {
-  c: {
-    name: Language.cpp,
-    prefix: "cpp",
-  },
-  "c++": {
-    name: Language.cpp,
-    prefix: "cpp",
-  },
-  "c#": {
-    name: Language.csharp,
-    prefix: "cs",
-  },
-  go: {
-    name: Language.go,
-    prefix: "go",
-  },
-  java: {
-    name: Language.java,
-    prefix: "java",
-  },
-  javascript: {
-    name: Language.javascript,
-    prefix: "js",
-  },
-  python: {
-    name: Language.python,
-    prefix: "py",
-  },
-  typescript: {
-    name: Language.javascript,
-    prefix: "js",
-  },
+const linguistToMetrics: Record<string, Language> = {
+  c: Language.cpp,
+  "c++": Language.cpp,
+  "c#": Language.csharp,
+  go: Language.go,
+  java: Language.java,
+  javascript: Language.javascript,
+  python: Language.python,
+  typescript: Language.javascript,
 };
 
 const nameToLinguist = Object.entries(linguistToMetrics).reduce(
-  (obj, [key, { name: action }]) => {
-    if (!obj[action]) {
-      obj[action] = [];
+  (obj, [key, name]) => {
+    if (!obj[name]) {
+      obj[name] = [];
     }
-    obj[action].push(key);
+    obj[name].push(key);
     return obj;
   },
   {} as Record<Language, string[]>
 );
 
+export function getIdPrefix(language: Language): IdPrefix {
+  switch (language) {
+    case Language.cpp:
+      return "cpp";
+    case Language.csharp:
+      return "cs";
+    case Language.go:
+      return "go";
+    case Language.java:
+      return "java";
+    case Language.javascript:
+      return "js";
+    case Language.python:
+      return "py";
+
+    default:
+      assertNever(language);
+  }
+}
+
 /**
  * Count the lines of code of the specified language using the include
  * and exclude glob paths.
@@ -72,10 +66,10 @@ export async function countLoc(
   exclude: string[],
   dbLanguages: Language[],
   logger: Logger
-): Promise<Partial<Record<IdPrefixes, number>>> {
+): Promise<Partial<Record<Language, number>>> {
   const result = await new LocDir({
     cwd,
-    include: ["**"].concat(include || []),
+    include: Array.isArray(include) && include.length > 0 ? include : ["**"],
     exclude,
     analysisLanguages: dbLanguages.flatMap((lang) => nameToLinguist[lang]),
   }).loadInfo();
@@ -86,12 +80,12 @@ export async function countLoc(
   const lineCounts = Object.entries(result.languages).reduce(
     (obj, [language, { code }]) => {
       const metricsLanguage = linguistToMetrics[language];
-      if (metricsLanguage && dbLanguages.includes(metricsLanguage.name)) {
-        obj[metricsLanguage.prefix] = code + (obj[metricsLanguage.prefix] || 0);
+      if (metricsLanguage && dbLanguages.includes(metricsLanguage)) {
+        obj[metricsLanguage] = code + (obj[metricsLanguage] || 0);
       }
       return obj;
     },
-    {} as Record<IdPrefixes, number>
+    {} as Record<Language, number>
   );
 
   if (Object.keys(lineCounts).length) {
diff --git a/src/util.ts b/src/util.ts
index 852f328f7..bfdfbd10b 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -390,3 +390,20 @@ export async function getGitHubAuth(
     "No GitHub authentication token was specified. Please provide a token via the GITHUB_TOKEN environment variable, or by adding the `--github-auth-stdin` flag and passing the token via standard input."
   );
 }
+
+/**
+ * This error is used to indicate a runtime failure of an exhaustivity check enforced at compile time.
+ */
+class ExhaustivityCheckingError extends Error {
+  constructor(public expectedExhaustiveValue: never) {
+    super("Internal error: exhaustivity checking failure");
+  }
+}
+
+/**
+ * Used to perform compile-time exhaustivity checking on a value.  This function will not be executed at runtime unless
+ * the type system has been subverted.
+ */
+export function assertNever(value: never): never {
+  throw new ExhaustivityCheckingError(value);
+}