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Shell: Implement history file for persistent history storage

This commit is contained in:
Bananymous 2024-10-16 00:21:33 +03:00
parent 6e981d1222
commit 41e2b898ab
2 changed files with 62 additions and 5 deletions
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64
userspace/programs/Shell/Input.cpp
View File

@ -15,6 +15,10 @@ static struct termios s_original_termios;
static struct termios s_raw_termios;
static bool s_termios_initialized { false };
static BAN::String s_history_path;
static BAN::Vector<BAN::String> s_history;
static constexpr size_t s_history_max_size = 1000;
static BAN::Vector<BAN::String> list_matching_entries(BAN::StringView path, BAN::StringView start, bool require_executable)
{
ASSERT(path.size() < PATH_MAX);
@ -330,7 +334,7 @@ BAN::Optional<BAN::String> Input::get_input(BAN::Optional<BAN::StringView> custo
}
clearerr(stdin);
m_buffers = m_history;
m_buffers = s_history;
MUST(m_buffers.emplace_back(""_sv));
m_buffer_index = m_buffers.size() - 1;
m_buffer_col = 0;
@ -502,8 +506,10 @@ BAN::Optional<BAN::String> Input::get_input(BAN::Optional<BAN::StringView> custo
if (!m_buffers[m_buffer_index].empty())
{
MUST(m_history.push_back(m_buffers[m_buffer_index]));
m_buffers = m_history;
MUST(s_history.push_back(m_buffers[m_buffer_index]));
if (s_history.size() > s_history_max_size)
s_history.remove(0);
m_buffers = s_history;
MUST(m_buffers.emplace_back(""_sv));
}
m_buffer_index = m_buffers.size() - 1;
@ -679,4 +685,56 @@ Input::Input()
if (gethostname(hostname_buffer, sizeof(hostname_buffer)) == 0) {
MUST(m_hostname.append(hostname_buffer));
}
if (const char* home_env = getenv("HOME"))
{
MUST(s_history_path.append(home_env));
MUST(s_history_path.append("/.shell_history"));
atexit([] {
FILE* history_fp = fopen(s_history_path.data(), "w");
if (history_fp == nullptr)
return;
for (const auto& line : s_history)
{
fwrite(line.data(), line.size(), 1, history_fp);
fputc('\n', history_fp);
}
fclose(history_fp);
});
FILE* history_fp = fopen(s_history_path.data(), "r");
if (history_fp == nullptr)
return;
char buffer[128];
BAN::String current_line;
while (fgets(buffer, sizeof(buffer), history_fp))
{
MUST(current_line.append(buffer));
if (current_line.back() != '\n')
continue;
current_line.pop_back();
MUST(s_history.push_back(BAN::move(current_line)));
if (s_history.size() > s_history_max_size)
s_history.remove(0);
current_line.clear();
}
fclose(history_fp);
if (!current_line.empty())
{
MUST(s_history.push_back(BAN::move(current_line)));
if (s_history.size() > s_history_max_size)
s_history.remove(0);
}
}
m_buffers = s_history;
MUST(m_buffers.emplace_back(""_sv));
m_buffer_index = m_buffers.size() - 1;
}

3
userspace/programs/Shell/Input.h
View File

@ -23,8 +23,7 @@ private:
private:
BAN::String m_hostname;
BAN::Vector<BAN::String> m_buffers { 1, ""_sv };
BAN::Vector<BAN::String> m_history;
BAN::Vector<BAN::String> m_buffers;
size_t m_buffer_index { 0 };
size_t m_buffer_col { 0 };