implement minimal cli

2 files changed, 35 insertions, 2 deletions

diff --git a/justfile b/justfile
index 5e38639..96c3831 100644
--- a/justfile
+++ b/justfile
@@ -4,6 +4,9 @@ help:
 build: fmt
     @zig build
 
+run QUERY:
+    @zig build run -- {{QUERY}}
+
 test: fmt
     @zig build test
 
diff --git a/src/main.zig b/src/main.zig
index 1d4f8bf..73d7886 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,6 +1,36 @@
 const std = @import("std");
-const zgjq = @import("zgjq");
+const jq = @import("zgjq").jq;
+const jv = @import("zgjq").jv;
 
 pub fn main() !void {
-    // TODO
+    const allocator = std.heap.smp_allocator;
+
+    const args = try std.process.argsAlloc(allocator);
+    defer std.process.argsFree(allocator, args);
+
+    if (args.len < 2) {
+        try std.fs.File.stderr().writeAll("usage: zgjq <query>\n");
+        std.process.exit(1);
+    }
+    const query = args[1];
+
+    const input = try std.fs.File.stdin().readToEndAlloc(allocator, std.math.maxInt(usize));
+    defer allocator.free(input);
+
+    const parsed = try jv.parse(allocator, input);
+    defer parsed.deinit();
+    const json = parsed.value;
+
+    var runtime = try jq.Runtime.init(allocator);
+    defer runtime.deinit();
+    try runtime.compileFromSlice(query);
+    try runtime.start(json);
+
+    const stdout = std.fs.File.stdout();
+    while (try runtime.next()) |result| {
+        const output = try jv.stringify(allocator, result);
+        defer allocator.free(output);
+        try stdout.writeAll(output);
+        try stdout.writeAll("\n");
+    }
 }