feat(show): export target dependency graph as JSON

Add a graph-oriented mode to `xmake show` for exporting target\ndependency relationships as JSON.\n\nThis adds `--target_graph` support for whole-project output and\noptional root-target filtering with `--target`.\n\nAdd a plugin test covering full-graph and single-target graph export.\n\nRefs #7475

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/plugins/show/test.lua b/tests/plugins/show/test.lua
new file mode 100644
index 000000000..0c0f783e6
--- /dev/null
+++ b/tests/plugins/show/test.lua
@@ -0,0 +1,85 @@
+import("core.base.json")
+
+local function _prepare_xmake_env()
+    local xmake = path.absolute(os.programfile())
+    local xmake_program_dir = path.absolute(os.programdir())
+    os.setenv("XMAKE_PROGRAM_FILE", xmake)
+    os.setenv("XMAKE_PROGRAM_DIR", xmake_program_dir)
+    return xmake
+end
+
+local function _create_project(tempdir)
+    io.writefile(path.join(tempdir, "xmake.lua"), [[
+add_rules("mode.debug", "mode.release")
+
+target("core")
+    set_kind("static")
+    add_files("src/core.c")
+
+target("ui")
+    set_kind("static")
+    add_deps("core")
+    add_files("src/ui.c")
+
+target("app")
+    set_kind("binary")
+    add_deps("core", "ui")
+    add_files("src/main.c")
+]])
+    os.mkdir(path.join(tempdir, "src"))
+    io.writefile(path.join(tempdir, "src", "core.c"), "int core(void) { return 0; }\n")
+    io.writefile(path.join(tempdir, "src", "ui.c"), "int ui(void) { return 0; }\n")
+    io.writefile(path.join(tempdir, "src", "main.c"), "int main(void) { return 0; }\n")
+end
+
+function test_target_graph_json(t)
+    local tempdir = os.tmpfile()
+    os.mkdir(tempdir)
+    _create_project(tempdir)
+
+    local homedir = path.join(tempdir, "home")
+    os.setenv("HOME", homedir)
+    os.mkdir(homedir)
+    os.mkdir(path.join(homedir, ".xmake"))
+
+    local xmake = _prepare_xmake_env()
+    local outdata = os.iorunv(xmake, {"show", "-P", tempdir, "--target_graph", "--json"})
+    local graph = json.decode(outdata)
+
+    t:are_equal(graph.root_targets, {"app"})
+    t:require(#graph.targets == 3)
+
+    local entries = {}
+    for _, target in ipairs(graph.targets) do
+        entries[target.name] = target
+    end
+    t:are_equal(entries.core.deps, {})
+    t:are_equal(entries.ui.deps, {"core"})
+    t:are_equal(entries.app.deps, {"core", "ui"})
+    t:are_equal(entries.app.orderdeps, {"core", "ui"})
+    t:are_equal(entries.app.kind, "binary")
+end
+
+function test_target_graph_json_for_single_target(t)
+    local tempdir = os.tmpfile()
+    os.mkdir(tempdir)
+    _create_project(tempdir)
+
+    local homedir = path.join(tempdir, "home")
+    os.setenv("HOME", homedir)
+    os.mkdir(homedir)
+    os.mkdir(path.join(homedir, ".xmake"))
+
+    local xmake = _prepare_xmake_env()
+    local outdata = os.iorunv(xmake, {"show", "-P", tempdir, "--target_graph", "--target=app", "--json"})
+    local graph = json.decode(outdata)
+
+    t:are_equal(graph.root_targets, {"app"})
+    t:require(#graph.targets == 3)
+
+    local names = {}
+    for _, target in ipairs(graph.targets) do
+        table.insert(names, target.name)
+    end
+    t:are_equal(names, {"core", "ui", "app"})
+end