From 406172425f91d7e334fc75538256f7ed65d1dfb9 Mon Sep 17 00:00:00 2001
From: Eduard Urbach <eduard@urbach.dev>
Date: Mon, 6 Jul 2026 11:58:24 +0200
Subject: [PATCH] Implemented functions command

---
 src/cli/Exec.go          |  3 +++
 src/cli/Exec_test.go     |  1 +
 src/cli/files.go         |  2 +-
 src/cli/functions.go     | 25 +++++++++++++++++++++++++
 src/cli/help.txt         |  6 +++++-
 src/verbose/Functions.go | 14 ++++++++++++++
 6 files changed, 49 insertions(+), 2 deletions(-)
 create mode 100644 src/cli/functions.go
 create mode 100644 src/verbose/Functions.go

diff --git a/src/cli/Exec.go b/src/cli/Exec.go
index ef5d605..4bc442f 100644
--- a/src/cli/Exec.go
+++ b/src/cli/Exec.go
@@ -19,6 +19,9 @@ func Exec(args []string) int {
 	case "format":
 		return format(args[1:])
 
+	case "functions":
+		return functions(args[1:])
+
 	case "help":
 		return help()
 
diff --git a/src/cli/Exec_test.go b/src/cli/Exec_test.go
index 3094b06..26bb966 100644
--- a/src/cli/Exec_test.go
+++ b/src/cli/Exec_test.go
@@ -20,6 +20,7 @@ func TestExec(t *testing.T) {
 	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "-dry", "-no-lint"}), 0)
 	assert.Equal(t, cli.Exec([]string{"build", "../../examples/hello", "-dry", "-no-optimize"}), 0)
 	assert.Equal(t, cli.Exec([]string{"files", "../../examples/hello"}), 0)
+	assert.Equal(t, cli.Exec([]string{"functions", "../../examples/hello"}), 0)
 	assert.Equal(t, cli.Exec([]string{"format", "../../examples/hello/hello.q"}), 0)
 	assert.Equal(t, cli.Exec([]string{"help"}), 0)
 	assert.Equal(t, cli.Exec([]string{"keywords"}), 0)
diff --git a/src/cli/files.go b/src/cli/files.go
index 36402a9..dcdb81c 100644
--- a/src/cli/files.go
+++ b/src/cli/files.go
@@ -5,7 +5,7 @@ import (
 	"git.urbach.dev/cli/q/src/verbose"
 )
 
-// files shows the entire list of files that are used in a build.
+// files shows the list of files that are used in a build.
 func files(args []string) int {
 	b, err := newBuild(args)
 
diff --git a/src/cli/functions.go b/src/cli/functions.go
new file mode 100644
index 0000000..be87822
--- /dev/null
+++ b/src/cli/functions.go
@@ -0,0 +1,25 @@
+package cli
+
+import (
+	"git.urbach.dev/cli/q/src/compiler"
+	"git.urbach.dev/cli/q/src/verbose"
+)
+
+// functions shows the list of functions that are used in a build.
+func functions(args []string) int {
+	b, err := newBuild(args)
+
+	if err != nil {
+		return exit(err)
+	}
+
+	b.Dry = true
+	env, err := compiler.Compile(b)
+
+	if err != nil {
+		return exit(err)
+	}
+
+	verbose.Functions(env.Init)
+	return success
+}
\ No newline at end of file
diff --git a/src/cli/help.txt b/src/cli/help.txt
index 3055f9b..de17273 100644
--- a/src/cli/help.txt
+++ b/src/cli/help.txt
@@ -12,9 +12,13 @@ Compiler for the Q programming language.
 
         q build [file]
 
-    Show intermediate stages:
+    List build details:
 
         q files [file]
+        q functions [file]
+
+    Show intermediate stages:
+
         q ssa [file]
         q asm [file]
 
diff --git a/src/verbose/Functions.go b/src/verbose/Functions.go
new file mode 100644
index 0000000..4c22219
--- /dev/null
+++ b/src/verbose/Functions.go
@@ -0,0 +1,14 @@
+package verbose
+
+import (
+	"fmt"
+
+	"git.urbach.dev/cli/q/src/core"
+)
+
+// Functions shows the list of live functions.
+func Functions(root *core.Function) {
+	root.EachDependency(make(map[*core.Function]bool), func(f *core.Function) {
+		fmt.Println(f.FullName)
+	})
+}
\ No newline at end of file
-- 
2.51.2