Merge pull request #224 from standardhealth/remove-out-before-build

Added archive flag to save old builds

.gitignore

@@ -4,6 +4,7 @@
 /yarn-error.log
 /node_modules
 /out*
+/archive*
 /.settings
 /CommentReintegration
 txCache

README.md

@@ -43,6 +43,7 @@ $ node . --help
     -d, --duplicate          show duplicate error messages (default: false)
     -j, --export-es6         export ES6 JavaScript classes (experimental, default: false)
     -i, --import-cimcore     import CIMCORE files instead of CIMPL (default: false)
+    -n, --clean              Save archive of old output directory and perform clean build (default: false)
     -h, --help               output usage information
 ```
 

app.js

@@ -38,6 +38,7 @@ program
   .option('-d, --duplicate', 'show duplicate error messages (default: false)')
   .option('-j, --export-es6', 'export ES6 JavaScript classes (experimental, default: false)')
   .option('-i, --import-cimcore', 'import CIMCORE files instead of CIMPL (default: false)')
+  .option('-n, --clean', 'Save archive of old output directory and perform clean build (default: false)')
   .arguments('<path-to-shr-defs>')
   .action(function (pathToShrDefs) {
     input = pathToShrDefs;
@@ -61,6 +62,31 @@ const doDD = program.skip.every(a => a.toLowerCase() != 'data-dict' && a.toLower
 const showDuplicateErrors = program.duplicate;
 const importCimcore = program.importCimcore;
 const doES6 = program.exportEs6;
+const clean = program.clean;
+
+// Archive old output directory if it exists
+if (clean && fs.existsSync(program.out)) {
+  let archiveDir;
+  let targetDir;
+  let slashIndex = program.out.lastIndexOf('/') > 0 ? 
+    program.out.lastIndexOf('/') : program.out.lastIndexOf('\\');
+  // Figure out path to move directory into archive
+  if (slashIndex > 0) {
+    archiveDir = path.join(program.out.substring(0, slashIndex), 'archive');
+    targetDir = path.join(archiveDir, program.out.substr(slashIndex));
+  } else {
+    archiveDir = 'archive';
+    targetDir = path.join(archiveDir, program.out);
+  }
+  // If archive does not exist, create it
+  if (!fs.existsSync(archiveDir)) {
+    mkdirp.sync(archiveDir);
+  }
+  // Ensure no naming conflicts with previous archives
+  let counter = 1;
+  while(fs.existsSync(targetDir + '-' + counter)) { counter += 1; }
+  fs.renameSync(program.out, targetDir + '-' + counter);
+}
 
 // Create the output folder if necessary
 mkdirp.sync(program.out);