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// file : tests/manifest-rewriter/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
// 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;
}
}
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