Add a wrapper program for running linters which cannot receive stdin input on Windows.

1 files changed, 84 insertions, 0 deletions

diff --git a/stdin_wrapper.d b/stdin_wrapper.d
new file mode 100644
index 00000000..8714bc2a
--- /dev/null
+++ b/stdin_wrapper.d
@@ -0,0 +1,84 @@
+// Author: w0rp <devw0rp@gmail.com>
+// Description: This file provides a D program for implementing
+//              the stdin-wrapper on Windows.
+
+import std.algorithm;
+import std.array;
+import std.file;
+import std.process;
+import std.stdio;
+import std.path;
+
+@safe
+auto createTemporaryFilename(string fileExtension) {
+    import std.uuid;
+
+    string filename;
+
+    do {
+        const randomPart = randomUUID().toString.replace("-", "_");
+
+        filename = buildPath(tempDir(), "ale_" ~ randomPart ~ fileExtension);
+    } while (exists(filename));
+
+    return filename;
+}
+
+@trusted
+void readStdinToFile(ref File tempFile) {
+    stdin.byChunk(4096).copy(tempFile.lockingTextWriter());
+}
+
+// Expand program names like "csslint" to "csslint.cmd"
+// D is not able to perform this kind of expanstion in spawnProcess
+@safe
+string expandedProgramName(string name) {
+    auto extArray = environment["PATHEXT"].split(";");
+
+    foreach(pathDir; environment["PATH"].split(";")) {
+        foreach(extension; extArray) {
+            const candidate = buildPath(pathDir, name ~ extension);
+
+            if (exists(candidate)) {
+                return candidate;
+            }
+        }
+    }
+
+    // We were given a full path for a program name, so use that.
+    if (exists(name)) {
+        return name;
+    }
+
+    return "";
+}
+
+@trusted
+int runLinterProgram(string[] args) {
+    const expandedName = expandedProgramName(args[0]);
+
+    writeln(expandedName);
+
+    if (expandedName) {
+        return wait(spawnProcess([expandedName] ~ args[1..$]));
+    }
+
+    return 1;
+}
+
+@safe
+int main(string[] args) {
+    const filename = createTemporaryFilename(args[1]);
+
+    auto tempFile = File(filename, "w");
+
+    scope(exit) {
+        tempFile.close();
+        remove(filename);
+    }
+
+    readStdinToFile(tempFile);
+    tempFile.close();
+
+    return runLinterProgram(args[2..$] ~ [filename]);
+}