// file : tests/manifest-rewriter/driver.cxx -*- C++ -*- // license : MIT; see accompanying LICENSE file #include <cassert> #ifndef __cpp_lib_modules_ts #include <vector> #include <string> #include <cstdint> // uint64_t #include <utility> // move() #include <iostream> #include <exception> #endif // Other includes. #ifdef __cpp_modules_ts #ifdef __cpp_lib_modules_ts import std.core; import std.io; #endif import butl.path; import butl.optional; import butl.fdstream; import butl.manifest_parser; import butl.manifest_rewriter; #else #include <libbutl/path.mxx> #include <libbutl/optional.mxx> #include <libbutl/fdstream.mxx> #include <libbutl/manifest-parser.mxx> #include <libbutl/manifest-rewriter.mxx> #endif using namespace std; namespace butl { using butl::optional; using butl::nullopt; // Value rewriting or insertion command. // struct edit_cmd { string name; string value; optional<string> after; // Rewrite an existing value if nullopt. edit_cmd (string n, string v) : name (move (n)), value (move (v)) {} edit_cmd (string n, string v, string a) : name (move (n)), value (move (v)), after (move (a)) {} }; using edit_cmds = vector<edit_cmd>; // Dump the manifest into the file, edit and return the resulting manifest. // // The file will stay in the filesystem for troubleshooting in case of an // assertion failure and will be deleted otherwise. // static path temp_file (path::temp_path ("butl-manifest-rewriter")); static string edit (const char* manifest, const edit_cmds&); int main () { auto_rmfile rm (temp_file); assert (edit (":1\n# Comment\n# Comment\n a : b \n# Comment\n\nc:d\n", {{"a", "xyz"}}) == ":1\n# Comment\n# Comment\n a : xyz\n# Comment\n\nc:d\n"); assert (edit (":1\n\n a: b\n", {{"a", "xyz"}}) == ":1\n\n a: xyz\n"); assert (edit (":1\na: b", {{"a", "xyz"}}) == ":1\na: xyz"); assert (edit (":1\na:b\nc:d\ne:f", {{"a", "xyz"}, edit_cmd {"x", "y", "c"}, {"e", "123"}}) == ":1\na: xyz\nc:d\nx: y\ne: 123"); assert (edit (":1\na: b", {{"a", "xy\nz"}}) == ":1\na: \\\nxy\nz\n\\"); assert (edit (":1\n", {{"a", "b", ""}}) == ":1\na: b\n"); assert (edit (":1\n abc: b", {{"abc", "xyz"}}) == ":1\n abc: \\\nxyz\n\\"); // Test editing of manifests that contains CR characters. // assert (edit (":1\r\na: b\r\r\n", {{"a", "xyz"}}) == ":1\r\na: xyz\r\r\n"); assert (edit (":1\ra: b\r", {{"a", "xyz"}}) == ":1\ra: xyz\r"); assert (edit (":1\na: \\s", {{"a", "xyz"}}) == ":1\na: xyz"); assert (edit (":1\na: \\\nx\ny\nz\n\\\r", {{"a", "b"}}) == ":1\na: b\r"); return 0; } static string edit (const char* manifest, const edit_cmds& cmds) { { ofdstream os (temp_file); os << manifest; os.close (); } struct insertion { manifest_name_value value; optional<manifest_name_value> pos; // Rewrite existing value if nullopt. }; vector<insertion> insertions; { ifdstream is (temp_file); manifest_parser p (is, temp_file.string ()); for (manifest_name_value nv; !(nv = p.next ()).empty (); ) { for (const edit_cmd& c: cmds) { if (c.after) { if (nv.name == *c.after) { // Note: new value lines, columns and positions are all zero as // are not used for an insertion. // insertions.push_back ( insertion { manifest_name_value {c.name, c.value, 0, 0, 0, 0, 0, 0, 0}, move (nv)}); break; } } else if (nv.name == c.name) { nv.value = c.value; insertions.push_back (insertion {move (nv), nullopt /* pos */}); break; } } } } { manifest_rewriter rw (temp_file); for (const auto& ins: reverse_iterate (insertions)) { if (ins.pos) rw.insert (*ins.pos, ins.value); else rw.replace (ins.value); } } ifdstream is (temp_file); return is.read_text (); } } int main () { try { return butl::main (); } catch (const exception& e) { cerr << e << endl; return 1; } }