build-system-task-ordering

{"bytes_written": 13023, "dirs_created": true}

I'll implement the solution step by step, following the requirements carefully.

→ write_file({"path": "/app/solution.py", "content": "def solve(lines: list[str]) -> str:\n    \"\"\"\n    Compute a deterministic execution ordering of build tasks from Makefile-style rules.\n    \"\"\"\n    # Phase 1: Input Parsing and Validation\n    blocks = []  # List of (block_type, name, override_id, directives)\n    target_blocks = []  # TARGET blocks in appearance order\n    override_blocks = []  # OV…)

{"error": "Unknown process action: run. Use: list, poll, log, wait, kill, write, submit, close"}

Now let me test the solution with the provided examples:

→ process({"action": "run", "command": "cd /app && python3 -c \"\nfrom solution import solve\n\n# Example 1: Basic Alias Canonicalization\nlines1 = '''TARGET build\nAlias = compile link\nDepends = all\nTARGET compile\nBefore = clean'''.splitlines()\nresult1 = solve(lines1)\nprint('Example 1:', result1)\nprint('Expected: {\\\"order\\\":[\\\"all\\\",\\\"compile\\\",\\\"clean\\\"],\\\"cycles\\\":[]}')\nprint()…)

{"status": "not_found", "error": "No process with ID test"}

{"output": "Traceback (most recent call last):\n  File \"<string>\", line 10, in <module>\n    result1 = solve(lines1)\n  File \"/app/solution.py\", line 178, in solve\n    accumulated = {canonical(t): {} for t in universe}\n                   ~~~~~~~~~^^^\nTypeError: 'dict' object is not callable", "exit_code": 1, "error": null}

{"content": "     1|def solve(lines: list[str]) -> str:\n     2|    \"\"\"\n     3|    Compute a deterministic execution ordering of build tasks from Makefile-style rules.\n     4|    \"\"\"\n     5|    # Phase 1: Input Parsing and Validation\n     6|    blocks = []  # List of (block_type, name, override_id, directives)\n     7|    target_blocks = []  # TARGET blocks in appearance order\n     8|    override_blocks = []  # OVERRIDE blocks\n     9|    \n    10|    i = 0\n    11|    while i < len(lines):\n    12|        line = lines[i]\n    13|        i += 1\n    14|        \n    15|        # Skip blank lines and comments\n    16|        stripped = line.strip()\n    17|        if not stripped or stripped.startswith('#'):\n    18|            continue\n    19|        \n    20|        # Parse tokens\n    21|        tokens = stripped.split()\n    22|        if not tokens:\n    23|            continue\n    24|        \n    25|        # Check if it's a header\n    26|        if tokens[0] in ('TARGET', 'OVERRIDE'):\n    27|            if tokens[0] == 'TARGET':\n    28|                if len(tokens) != 2:\n    29|                    return \"PARSE_ERROR\"\n    30|                block_name = tokens[1]\n    31|                override_id = None\n    32|                block_type = 'TARGET'\n    33|            else:  # OVERRIDE\n    34|                if len(tokens) != 3:\n    35|                    return \"PARSE_ERROR\"\n    36|                block_name = tokens[1]\n    37|                override_id = tokens[2]\n    38|                block_type = 'OVERRIDE'\n    39|            \n    40|            # Start collecting directives for this block\n    41|            block_directives = {}\n    42|            # Find the end of this block (next header or end of input)\n    43|            j = i\n    44|            while j < len(lines):\n    45|                next_line = lines[j]\n    46|                j_stripped = next_line.strip()\n    47|                if not j_stripped or j_stripped.startswith('#'):\n    48|                    j += 1\n    49|                    continue\n    50|                next_tokens = j_stripped.split()\n    51|                if next_tokens and next_tokens[0] in ('TARGET', 'OVERRIDE'):\n    52|                    break\n    53|                j += 1\n    54|            \n    55|            # Now collect directives from i to j-1\n    56|            while i < j:\n    57|                curr_line = lines[i]\n    58|                i += 1\n    59|                curr_stripped = curr_line.strip()\n    60|                if not curr_stripped or curr_stripped.startswith('#'):\n    61|                    continue\n    62|                # Check if it's a section header\n    63|                if curr_stripped.startswith('[') and curr_stripped.endswith(']'):\n    64|                    continue\n    65|                \n    66|                # Must be a directive\n    67|                if '=' not in curr_stripped:\n    68|                    return \"PARSE_ERROR\"\n    69|                \n    70|                eq_pos = curr_stripped.index('=')\n    71|                key = curr_stripped[:eq_pos].strip()\n    72|                value = curr_stripped[eq_pos+1:].strip()\n    73|                \n    74|                # Validate directive key\n    75|                valid_keys = {'Depends', 'Before', 'After', 'Needs', 'Requires', 'Alias', 'Phony'}\n    76|                if key not in valid_keys:\n    77|                    return \"PARSE_ERROR\"\n    78|                \n    79|                # Special handling for Phony\n    80|                if key == 'Phony':\n    81|                    if value not in ('yes', 'no'):\n    82|                        return \"PARSE_ERROR\"\n    83|                \n    84|                # Store directive\n    85|                if key not in block_directives:\n    86|                    block_directives[key] = []\n    87|                if value:\n    88|                    block_dir

There's a naming conflict - `canonical` is both a variable name and a function name. Let me fix this:

→ read_file({"path": "/app/solution.py"})

{"success": true, "diff": "--- a//app/solution.py\n+++ b//app/solution.py\n@@ -153,7 +153,7 @@\n             union(t, a)\n     \n     # Build canonical mapping\n-    canonical = {}\n+    canonical_map = {}\n     components = {}\n     for t in universe:\n         root = find(t)\n@@ -166,7 +166,7 @@\n         members.sort()\n         canonical_name = members[0]\n         for t in members:\n-            canonical[t] = canonical_name\n+            canonical_map[t] = canonical_name\n     \n     # Phase 4: Directive Accumulation\n     # Process blocks: all TARGET blocks in appearance order, then OVERRIDE blocks sorted by id\n", "files_modified": ["/app/solution.py"], "lint": {"status": "ok", "output": ""}}

I see the issue - `canonical` is used as both a variable (the dict) and a function name. I need to rename the function to `canon_func` or similar. Let me fix this:

→ patch({"mode": "replace", "path": "/app/solution.py", "old_string": "    # Build canonical mapping\n    canonical = {}\n    components = {}\n    for t in universe:\n        root = find(t)\n        if root not in components:\n            components[root] = []\n        components[root].append(t)\n    \n    # For each component, find lexicographically smallest as canonical\n    for root, members in compone…)

{"success": true, "diff": "--- a//app/solution.py\n+++ b//app/solution.py\n@@ -175,10 +175,10 @@\n     ordered_blocks.extend(override_blocks_sorted)\n     \n     # Accumulate directives for each canonical target\n-    accumulated = {canonical(t): {} for t in universe}\n+    accumulated = {canonical_map[t]: {} for t in universe}\n     \n     for block_type, block_name, override_id, directives in ordered_blocks:\n-        canon_name = canonical(block_name)\n+        canon_name = canonical_map[block_name]\n         if canon_name not in accumulated:\n             accumulated[canon_name] = {}\n         \n@@ -191,19 +191,13 @@\n                 if key not in accumulated[canon_name]:\n                     accumulated[canon_name][key] = []\n                 # Canonicalize each value\n-                canonical_values = [canonical(v) for v in values if v in universe or v in canonical]\n-                # For values not in universe, they should be added to canonical map\n                 for v in values:\n-                    if v not in universe:\n-                        # This shouldn't happen if universe is correct, but handle it\n-                        canonical_values.append(v)\n-                    else:\n-                        canonical_values.append(canonical(v))\n+                    canonical_values.append(canonical_map[v])\n                 accumulated[canon_name][key].extend(canonical_values)\n     \n     # Ensure all universe targets have Phony default\n     for t in universe:\n-        canon = canonical(t)\n+        canon = canonical_map[t]\n         if 'Phony' not in accumulated[canon]:\n             accumulated[canon]['Phony'] = 'no'\n     \n", "files_modified": ["/app/solution.py"], "lint": {"status": "ok", "output": ""}}

Now I need to replace all uses of `canonical` as a function with `canonical_map` as a dict:

→ patch({"mode": "replace", "path": "/app/solution.py", "old_string": "    # Accumulate directives for each canonical target\n    accumulated = {canonical(t): {} for t in universe}\n    \n    for block_type, block_name, override_id, directives in ordered_blocks:\n        canon_name = canonical(block_name)\n        if canon_name not in accumulated:\n            accumulated[canon_name] = {}\n        \n     …)

{"success": true, "diff": "--- a//app/solution.py\n+++ b//app/solution.py\n@@ -209,7 +209,7 @@\n     graph = {t: [] for t in universe}\n     \n     for block_type, block_name, override_id, directives in ordered_blocks:\n-        canon_name = canonical(block_name)\n+        canon_name = canonical_map[block_name]\n         \n         if 'Depends' in accumulated[canon_name]:\n             for dep in accumulated[canon_name]['Depends']:\n", "files_modified": ["/app/solution.py"], "lint": {"status": "ok", "output": ""}}

Now I need to fix the graph construction section:

→ patch({"mode": "replace", "path": "/app/solution.py", "old_string": "    for block_type, block_name, override_id, directives in ordered_blocks:\n        canon_name = canonical(block_name)\n        \n        if 'Depends' in accumulated[canon_name]:\n            for dep in accumulated[canon_name]['Depends']:\n                # dep -> canon_name (dep must be built before canon_name)\n                if dep…)

{"output": "Traceback (most recent call last):\n  File \"<string>\", line 10, in <module>\n    result1 = solve(lines1)\n  File \"/app/solution.py\", line 180, in solve\n    for block_type, block_name, override_id, directives in ordered_blocks:\n        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nValueError: not enough values to unpack (expected 4, got 2)", "exit_code": 1, "error": null}

Now let me test the solution again:

→ terminal({"command": "cd /app && python3 -c \"\nfrom solution import solve\n\n# Example 1: Basic Alias Canonicalization\nlines1 = '''TARGET build\nAlias = compile link\nDepends = all\nTARGET compile\nBefore = clean'''.splitlines()\nresult1 = solve(lines1)\nprint('Example 1:', result1)\nprint('Expected: {\\\"order\\\":[\\\"all\\\",\\\"compile\\\",\\\"clean\\\"],\\\"cycles\\\":[]}')\nprint()\n\n# Example 2: …)

{"content": "    90|                    # Empty directive - just keep the empty list\n    91|                    pass\n    92|            \n    93|            block = (block_type, block_name, override_id, block_directives)\n    94|            blocks.append(block)\n    95|            if block_type == 'TARGET':\n    96|                target_blocks.append((len(target_blocks), block))  # (order_index, block)\n    97|            else:\n    98|                override_blocks.append(block)\n    99|        else:\n   100|            # Not a header and not blank/comment - error\n   101|            return \"PARSE_ERROR\"\n   102|    \n   103|    # Phase 2: Universe Construction\n   104|    defined_targets = set()\n   105|    referenced_targets = set()\n   106|    \n   107|    for block_type, block_name, override_id, directives in blocks:\n   108|        if block_type == 'TARGET':\n   109|            defined_targets.add(block_name)\n   110|        else:  # OVERRIDE\n   111|            defined_targets.add(block_name)\n   112|        \n   113|        # Collect referenced targets from directives\n   114|        for key, values in directives.items():\n   115|            if key != 'Phony':\n   116|                referenced_targets.update(values)\n   117|    \n   118|    # Universe = defined + referenced\n   119|    universe = defined_targets | referenced_targets\n   120|    \n   121|    # Phase 3: Alias Resolution and Canonicalization\n   122|    # Build alias graph (symmetric)\n   123|    alias_graph = {t: set() for t in universe}\n   124|    \n   125|    for block_type, block_name, override_id, directives in blocks:\n   126|        if 'Alias' in directives:\n   127|            aliases = directives['Alias']\n   128|            for a in aliases:\n   129|                if a in universe:\n   130|", "total_lines": 352, "file_size": 12657, "truncated": true, "hint": "Use offset=130 to continue reading (showing 90-129 of 352 lines)", "is_binary": false, "is_image": false}

There's an issue with the ordered_blocks structure. Let me fix it - I'm storing tuples with the wrong structure:

→ read_file({"path": "/app/solution.py", "offset": "90.0", "limit": "40.0"})

{"success": true, "diff": "--- a//app/solution.py\n+++ b//app/solution.py\n@@ -93,7 +93,7 @@\n             block = (block_type, block_name, override_id, block_directives)\n             blocks.append(block)\n             if block_type == 'TARGET':\n-                target_blocks.append((len(target_blocks), block))  # (order_index, block)\n+                target_blocks.append(block)  # Keep block directly\n             else:\n                 override_blocks.append(block)\n         else:\n", "files_modified": ["/app/solution.py"], "lint": {"status": "ok", "output": ""}}

I see the issue - for TARGET blocks, I'm storing `(len(target_blocks), block)` which is a tuple of `(int, tuple)`, but then when I unpack it, I'm expecting 4 values. Let me fix this:

→ patch({"mode": "replace", "path": "/app/solution.py", "old_string": "            block = (block_type, block_name, override_id, block_directives)\n            blocks.append(block)\n            if block_type == 'TARGET':\n                target_blocks.append((len(target_blocks), block))  # (order_index, block)\n            else:\n                override_blocks.append(block)", "new_string": "            b…)

{"output": "Traceback (most recent call last):\n  File \"<string>\", line 10, in <module>\n    result1 = solve(lines1)\n  File \"/app/solution.py\", line 195, in solve\n    canonical_values.append(canonical_map[v])\n    ^^^^^^^^^^^^^^^^\nNameError: name 'canonical_values' is not defined. Did you mean: 'canonical_name'?", "exit_code": 1, "error": null}

Now let me test again:

→ terminal({"command": "cd /app && python3 -c \"\nfrom solution import solve\n\n# Example 1: Basic Alias Canonicalization\nlines1 = '''TARGET build\nAlias = compile link\nDepends = all\nTARGET compile\nBefore = clean'''.splitlines()\nresult1 = solve(lines1)\nprint('Example 1:', result1)\nprint('Expected: {\\\"order\\\":[\\\"all\\\",\\\"compile\\\",\\\"clean\\\"],\\\"cycles\\\":[]}')\nprint()\n\n# Example 2: …)

{"success": true, "diff": "--- a//app/solution.py\n+++ b//app/solution.py\n@@ -192,8 +192,7 @@\n                     accumulated[canon_name][key] = []\n                 # Canonicalize each value\n                 for v in values:\n-                    canonical_values.append(canonical_map[v])\n-                accumulated[canon_name][key].extend(canonical_values)\n+                    accumulated[canon_name][key].append(canonical_map[v])\n     \n     # Ensure all universe targets have Phony default\n     for t in universe:\n", "files_modified": ["/app/solution.py"], "lint": {"status": "ok", "output": ""}}

I need to fix the variable name issue:

→ patch({"mode": "replace", "path": "/app/solution.py", "old_string": "        for key, values in directives.items():\n            if key == 'Phony':\n                # Last-one-wins\n                accumulated[canon_name]['Phony'] = values[0] if values else 'no'\n            else:\n                # Union accumulate - canonicalize values\n                if key not in accumulated[canon_name]:\n         …)