tests/dep_tree: Make sure dependency tree is created correctly

.gitignore

@@ -11,3 +11,4 @@ compile_commands.json
 .bob
 .bootstrap
 .test-out
+tests/deps/build.fl

tests/dep_tree.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+set -e
+
+. tests/common.sh
+
+# Test the internal 'bob dep-tree' command and dependency tree creation.
+
+# TODO Extra tests: make sure we can't depend on ourselves (this is a circular dependency, right? Will this be caught by our circular dependency check?)
+# We need a circular dependency check of course.
+# Also a check for a dependency which don't exit.
+# And a check that we're caching dependencies correctly (i.e. same version same cache, different versions different cache).
+# Also also a check that we don't have the same dependency twice in our list.
+
+# Test dependency tree creation.
+
+cp tests/deps/build{.normal,}.fl
+rm -rf tests/deps/.bob tests/deps/dep{1,2}/.bob
+bob -C tests/deps dep-tree >/dev/null 2>/dev/null
+
+DEPS_TREE_PATH=tests/deps/.bob/deps.tree
+
+if [ ! -f $DEPS_TREE_PATH ]; then
+	echo "Dependency tree not created." >&2
+	exit 1
+fi
+
+DEP1=$(find ~/.cache/bob/deps -name "*dep1*")
+DEP2=$(find ~/.cache/bob/deps -name "*dep2*")
+
+echo "$DEP1" > $DEPS_TREE_PATH.expected
+echo "\t$DEP2" >> $DEPS_TREE_PATH.expected
+echo "$DEP2" >> $DEPS_TREE_PATH.expected
+
+if ! diff $DEPS_TREE_PATH $DEPS_TREE_PATH.expected; then
+	echo "Dependency tree differed to the one expected." >&2
+	exit 1
+fi

tests/deps/build.normal.fl

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2024 Aymeric Wibo
+
+import bob
+
+deps = [
+	Dep.local("dep1"),
+	Dep.local("dep2"),
+]

tests/deps/dep1/build.fl

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2024 Aymeric Wibo
+
+import bob
+
+deps = [
+	Dep.local("../dep2"),
+]

tests/deps/dep2/build.fl

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: MIT
+# Copyright (c) 2024 Aymeric Wibo
+
+import bob