aboutsummaryrefslogtreecommitdiff
path: root/src/lpm.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/lpm.c')
-rw-r--r--src/lpm.c575
1 files changed, 575 insertions, 0 deletions
diff --git a/src/lpm.c b/src/lpm.c
new file mode 100644
index 0000000..760c372
--- /dev/null
+++ b/src/lpm.c
@@ -0,0 +1,575 @@
+#include <git2.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <lua.h>
+#include <lauxlib.h>
+#include <ctype.h>
+#include <lualib.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <archive.h>
+#include <archive_entry.h>
+
+#include <sys/stat.h>
+#include <git2.h>
+#include <openssl/evp.h>
+#include <curl/curl.h>
+
+#ifdef _WIN32
+ #include <direct.h>
+ #include <winsock2.h>
+ #include <windows.h>
+ #include <fileapi.h>
+#else
+ #define MAX_PATH PATH_MAX
+#endif
+
+static char hex_digits[] = "0123456789abcdef";
+static int lpm_hash(lua_State* L) {
+ size_t len;
+ const char* data = luaL_checklstring(L, 1, &len);
+ const char* type = luaL_optstring(L, 2, "string");
+ unsigned char buffer[EVP_MAX_MD_SIZE];
+ EVP_MD_CTX* c = EVP_MD_CTX_new();
+ EVP_MD_CTX_init(c);
+ EVP_DigestInit_ex(c, EVP_sha256(), NULL);
+ if (strcmp(type, "file") == 0) {
+ FILE* file = fopen(data, "rb");
+ if (!file) {
+ EVP_DigestFinal(c, buffer, NULL);
+ return luaL_error(L, "can't open %s", data);
+ }
+ while (1) {
+ unsigned char chunk[4096];
+ size_t bytes = fread(chunk, 1, sizeof(chunk), file);
+ EVP_DigestUpdate(c, chunk, bytes);
+ if (bytes < 4096)
+ break;
+ }
+ fclose(file);
+ } else {
+ EVP_DigestUpdate(c, data, len);
+ }
+ int digest_length;
+ EVP_DigestFinal(c, buffer, &digest_length);
+ EVP_MD_CTX_free(c);
+ char hex_buffer[EVP_MAX_MD_SIZE * 2];
+ for (size_t i = 0; i < digest_length; ++i) {
+ hex_buffer[i*2+0] = hex_digits[buffer[i] >> 4];
+ hex_buffer[i*2+1] = hex_digits[buffer[i] & 0xF];
+ }
+ lua_pushlstring(L, hex_buffer, digest_length * 2);
+ hex_buffer[digest_length*2]=0;
+ return 1;
+}
+
+int lpm_symlink(lua_State* L) {
+ #ifndef _WIN32
+ if (symlink(luaL_checkstring(L, 1), luaL_checkstring(L, 2)))
+ return luaL_error(L, "can't create symlink %s: %s", luaL_checkstring(L, 2), strerror(errno));
+ return 0;
+ #else
+ return luaL_error(L, "can't create symbolic link %s: your operating system sucks", luaL_checkstring(L, 2));
+ #endif
+}
+
+int lpm_chmod(lua_State* L) {
+ if (chmod(luaL_checkstring(L, 1), luaL_checkinteger(L, 2)))
+ return luaL_error(L, "can't chmod %s: %s", luaL_checkstring(L, 1), strerror(errno));
+ return 0;
+}
+
+/** BEGIN STOLEN LITE CODE **/
+#if _WIN32
+static LPWSTR utfconv_utf8towc(const char *str) {
+ LPWSTR output;
+ int len = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
+ if (len == 0)
+ return NULL;
+ output = (LPWSTR) malloc(sizeof(WCHAR) * len);
+ if (output == NULL)
+ return NULL;
+ len = MultiByteToWideChar(CP_UTF8, 0, str, -1, output, len);
+ if (len == 0) {
+ free(output);
+ return NULL;
+ }
+ return output;
+}
+
+static char *utfconv_wctoutf8(LPCWSTR str) {
+ char *output;
+ int len = WideCharToMultiByte(CP_UTF8, 0, str, -1, NULL, 0, NULL, NULL);
+ if (len == 0)
+ return NULL;
+ output = (char *) malloc(sizeof(char) * len);
+ if (output == NULL)
+ return NULL;
+ len = WideCharToMultiByte(CP_UTF8, 0, str, -1, output, len, NULL, NULL);
+ if (len == 0) {
+ free(output);
+ return NULL;
+ }
+ return output;
+}
+#endif
+
+static int lpm_ls(lua_State *L) {
+ const char *path = luaL_checkstring(L, 1);
+
+#ifdef _WIN32
+ lua_settop(L, 1);
+ lua_pushstring(L, path[0] == 0 || strchr("\\/", path[strlen(path) - 1]) != NULL ? "*" : "/*");
+ lua_concat(L, 2);
+ path = lua_tostring(L, -1);
+
+ LPWSTR wpath = utfconv_utf8towc(path);
+ if (wpath == NULL)
+ return luaL_error(L, "can't ls %s: invalid utf8 character conversion", path);
+
+ WIN32_FIND_DATAW fd;
+ HANDLE find_handle = FindFirstFileExW(wpath, FindExInfoBasic, &fd, FindExSearchNameMatch, NULL, 0);
+ free(wpath);
+ if (find_handle == INVALID_HANDLE_VALUE)
+ return luaL_error(L, "can't ls %s: %d", path, GetLastError());
+ char mbpath[MAX_PATH * 4]; // utf-8 spans 4 bytes at most
+ int len, i = 1;
+ lua_newtable(L);
+
+ do
+ {
+ if (wcscmp(fd.cFileName, L".") == 0) { continue; }
+ if (wcscmp(fd.cFileName, L"..") == 0) { continue; }
+
+ len = WideCharToMultiByte(CP_UTF8, 0, fd.cFileName, -1, mbpath, MAX_PATH * 4, NULL, NULL);
+ if (len == 0) { break; }
+ lua_pushlstring(L, mbpath, len - 1); // len includes \0
+ lua_rawseti(L, -2, i++);
+ } while (FindNextFileW(find_handle, &fd));
+
+ int err = GetLastError();
+ FindClose(find_handle);
+ if (err != ERROR_NO_MORE_FILES)
+ return luaL_error(L, "can't ls %s: %d", path, GetLastError());
+ return 1;
+#else
+ DIR *dir = opendir(path);
+ if (!dir)
+ return luaL_error(L, "can't ls %s: %d", path, strerror(errno));
+ lua_newtable(L);
+ int i = 1;
+ struct dirent *entry;
+ while ( (entry = readdir(dir)) ) {
+ if (strcmp(entry->d_name, "." ) == 0) { continue; }
+ if (strcmp(entry->d_name, "..") == 0) { continue; }
+ lua_pushstring(L, entry->d_name);
+ lua_rawseti(L, -2, i);
+ i++;
+ }
+ closedir(dir);
+ return 1;
+#endif
+}
+
+static int lpm_rmdir(lua_State *L) {
+ const char *path = luaL_checkstring(L, 1);
+#ifdef _WIN32
+ LPWSTR wpath = utfconv_utf8towc(path);
+ int deleted = RemoveDirectoryW(wpath);
+ free(wpath);
+ if (!deleted)
+ return luaL_error(L, "can't rmdir %s: %d", path, GetLastError());
+#else
+ if (remove(path))
+ return luaL_error(L, "can't rmdir %s: %s", path, strerror(errno));
+#endif
+ return 0;
+}
+
+static int lpm_mkdir(lua_State *L) {
+ const char *path = luaL_checkstring(L, 1);
+#ifdef _WIN32
+ LPWSTR wpath = utfconv_utf8towc(path);
+ if (wpath == NULL)
+ return luaL_error(L, "can't mkdir %s: invalid utf8 character conversion", path);
+ int err = _wmkdir(wpath);
+ free(wpath);
+#else
+ int err = mkdir(path, S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
+#endif
+ if (err < 0)
+ return luaL_error(L, "can't mkdir %s: %s", path, strerror(errno));
+ return 0;
+}
+
+static int lpm_stat(lua_State *L) {
+ const char *path = luaL_checkstring(L, 1);
+ lua_newtable(L);
+#ifdef _WIN32
+ #define realpath(x, y) _wfullpath(y, x, MAX_PATH)
+ struct _stat s;
+ LPWSTR wpath = utfconv_utf8towc(path);
+ if (wpath == NULL)
+ return luaL_error(L, "can't stat %s: invalid utf8 character conversion", path);
+ int err = _wstat(wpath, &s);
+ LPWSTR wfullpath = realpath(wpath, NULL);
+ free(wpath);
+ if (!wfullpath) return 0;
+ char *abs_path = utfconv_wctoutf8(wfullpath);
+ free(wfullpath);
+#else
+ struct stat s;
+ int err = lstat(path, &s);
+ char *abs_path = realpath(path, NULL);
+#endif
+ if (err || !abs_path) {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+ lua_pushstring(L, abs_path); lua_setfield(L, -2, "abs_path");
+ lua_pushvalue(L, 1); lua_setfield(L, -2, "path");
+
+#if __linux__
+ if (S_ISLNK(s.st_mode)) {
+ char buffer[PATH_MAX];
+ ssize_t len = readlink(path, buffer, sizeof(buffer));
+ if (len < 0)
+ return 0;
+ lua_pushlstring(L, buffer, len);
+ } else
+ lua_pushnil(L);
+ lua_setfield(L, -2, "symlink");
+ if (S_ISLNK(s.st_mode))
+ err = stat(path, &s);
+ if (err)
+ return 1;
+#endif
+ lua_pushinteger(L, s.st_mtime); lua_setfield(L, -2, "modified");
+ lua_pushinteger(L, s.st_size); lua_setfield(L, -2, "size");
+ if (S_ISREG(s.st_mode)) {
+ lua_pushstring(L, "file");
+ } else if (S_ISDIR(s.st_mode)) {
+ lua_pushstring(L, "dir");
+ } else {
+ lua_pushnil(L);
+ }
+ lua_setfield(L, -2, "type");
+ return 1;
+}
+/** END STOLEN LITE CODE **/
+
+static const char* git_error_last_string() {
+ const git_error* last_error = git_error_last();
+ return last_error->message;
+}
+
+static int git_get_id(git_oid* commit_id, git_repository* repository, const char* name) {
+ int length = strlen(name);
+ int is_hex = length == 40;
+ for (int i = 0; is_hex && i < length; ++i)
+ is_hex = isxdigit(name[i]);
+ if (!is_hex)
+ return git_reference_name_to_id(commit_id, repository, name);
+ return git_oid_fromstr(commit_id, name);
+}
+
+static git_repository* luaL_checkgitrepo(lua_State* L, int index) {
+ const char* path = luaL_checkstring(L, index);
+ git_repository* repository;
+ if (git_repository_open(&repository, path))
+ return (void*)(long long)luaL_error(L, "git open error: %s", git_error_last_string());
+ return repository;
+}
+
+
+static git_commit* git_retrieve_commit(git_repository* repository, const char* commit_name) {
+ git_oid commit_id;
+ git_commit* commit;
+ if (git_get_id(&commit_id, repository, commit_name) || git_commit_lookup(&commit, repository, &commit_id))
+ return NULL;
+ return commit;
+}
+
+
+static int lpm_reset(lua_State* L) {
+ git_repository* repository = luaL_checkgitrepo(L, 1);
+ const char* commit_name = luaL_checkstring(L, 2);
+ const char* type = luaL_checkstring(L, 3);
+ git_commit* commit = git_retrieve_commit(repository, commit_name);
+ if (!commit) {
+ git_repository_free(repository);
+ return luaL_error(L, "git retrieve commit error: %s", git_error_last_string());
+ }
+ git_reset_t reset_type = GIT_RESET_SOFT;
+ if (strcmp(type, "mixed") == 0)
+ reset_type = GIT_RESET_MIXED;
+ else if (strcmp(type, "hard") == 0)
+ reset_type = GIT_RESET_HARD;
+ int result = git_reset(repository, (git_object*)commit, reset_type, NULL);
+ git_commit_free(commit);
+ git_repository_free(repository);
+ if (result)
+ return luaL_error(L, "git reset error: %s", git_error_last_string());
+ return 0;
+}
+
+
+static int lpm_init(lua_State* L) {
+ const char* path = luaL_checkstring(L, 1);
+ const char* url = luaL_checkstring(L, 2);
+ git_repository* repository;
+ if (git_repository_init(&repository, path, 0))
+ return luaL_error(L, "git init error: %s", git_error_last_string());
+ git_remote* remote;
+ if (git_remote_create(&remote, repository, "origin", url)) {
+ git_repository_free(repository);
+ return luaL_error(L, "git remote add error: %s", git_error_last_string());
+ }
+ git_remote_free(remote);
+ git_repository_free(repository);
+ return 0;
+}
+
+
+static int lpm_fetch(lua_State* L) {
+ git_repository* repository = luaL_checkgitrepo(L, 1);
+ git_remote* remote;
+ if (git_remote_lookup(&remote, repository, "origin")) {
+ git_repository_free(repository);
+ return luaL_error(L, "git remote fetch error: %s", git_error_last_string());
+ }
+ git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
+ if (git_remote_fetch(remote, NULL, &fetch_opts, NULL)) {
+ git_remote_free(remote);
+ git_repository_free(repository);
+ return luaL_error(L, "git remote fetch error: %s", git_error_last_string());
+ }
+ git_remote_free(remote);
+ git_repository_free(repository);
+ return 0;
+}
+
+
+static CURL *curl;
+static int lpm_certs(lua_State* L) {
+ const char* type = luaL_checkstring(L, 1);
+ const char* path = luaL_checkstring(L, 2);
+ if (strcmp(type, "dir") == 0) {
+ git_libgit2_opts(GIT_OPT_SET_SSL_CERT_LOCATIONS, NULL, path);
+ curl_easy_setopt(curl, CURLOPT_CAINFO, path);
+ } else {
+ git_libgit2_opts(GIT_OPT_SET_SSL_CERT_LOCATIONS, path, NULL);
+ curl_easy_setopt(curl, CURLOPT_CAPATH, path);
+ }
+ return 0;
+}
+
+static int lpm_extract(lua_State* L) {
+ const char* src = luaL_checkstring(L, 1);
+ const char* dst = luaL_optstring(L, 2, ".");
+
+ char error_buffer[1024] = {0};
+ struct archive_entry *entry;
+ const void *buff;
+ int flags = 0;
+ int r;
+ size_t size;
+#if ARCHIVE_VERSION_NUMBER >= 3000000
+ int64_t offset;
+#else
+ off_t offset;
+#endif
+ struct archive *ar = archive_read_new();
+ struct archive *aw = archive_write_disk_new();
+ archive_write_disk_set_options(aw, flags);
+ archive_read_support_format_tar(ar);
+ archive_read_support_format_zip(ar);
+ archive_read_support_filter_gzip(ar);
+ if ((r = archive_read_open_filename(ar, src, 10240))) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(ar));
+ goto cleanup;
+ }
+ for (;;) {
+ int r = archive_read_next_header(ar, &entry);
+ if (r == ARCHIVE_EOF)
+ break;
+ if (r != ARCHIVE_OK) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(ar));
+ goto cleanup;
+ }
+ char path[MAX_PATH];
+ strcpy(path, dst); strcat(path, "/");
+ strncat(path, archive_entry_pathname(entry), sizeof(path) - 3); path[MAX_PATH-1] = 0;
+ archive_entry_set_pathname(entry, path);
+ if (archive_write_header(aw, entry) != ARCHIVE_OK) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(aw));
+ goto cleanup;
+ }
+ for (;;) {
+ int r = archive_read_data_block(ar, &buff, &size, &offset);
+ if (r == ARCHIVE_EOF)
+ break;
+ if (r != ARCHIVE_OK) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(ar));
+ goto cleanup;
+ }
+ if (archive_write_data_block(aw, buff, size, offset) != ARCHIVE_OK) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(aw));
+ goto cleanup;
+ }
+ }
+ if (archive_write_finish_entry(aw) != ARCHIVE_OK) {
+ snprintf(error_buffer, sizeof(error_buffer), "error extracting archive %s: %s", src, archive_error_string(aw));
+ goto cleanup;
+ }
+ }
+ cleanup:
+ archive_read_close(ar);
+ archive_read_free(ar);
+ archive_write_close(aw);
+ archive_write_free(aw);
+ if (error_buffer[0])
+ return luaL_error(L, "error extracting archive %s: %s", src, archive_error_string(ar));
+ return 0;
+}
+
+static size_t lpm_curl_write_callback(char *ptr, size_t size, size_t nmemb, void *BL) {
+ luaL_Buffer* B = BL;
+ luaL_addlstring(B, ptr, size*nmemb);
+ return size*nmemb;
+}
+
+static int lpm_get(lua_State* L) {
+ long response_code;
+ const char* url = luaL_checkstring(L, 1);
+ const char* path = luaL_optstring(L, 2, NULL);
+ // curl_easy_reset(curl);
+ curl_easy_setopt(curl, CURLOPT_URL, url);
+ curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
+ #ifdef _WIN32
+ curl_easy_setopt(curl, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NATIVE_CA);
+ #endif
+ if (path) {
+ FILE* file = fopen(path, "wb");
+ if (!file)
+ return luaL_error(L, "error opening file %s: %s", path, strerror(errno));
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite);
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, file);
+ CURLcode res = curl_easy_perform(curl);
+ if (res != CURLE_OK) {
+ fclose(file);
+ return luaL_error(L, "curl error accessing %s: %s", url, curl_easy_strerror(res));
+ }
+ fclose(file);
+ curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
+ if (response_code != 200)
+ return luaL_error(L, "curl error accessing %s, non-200 response code: %d", url, response_code);
+ lua_pushnil(L);
+ lua_newtable(L);
+ return 2;
+ } else {
+ luaL_Buffer B;
+ luaL_buffinit(L, &B);
+ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, lpm_curl_write_callback);
+ curl_easy_setopt(curl, CURLOPT_WRITEDATA, &B);
+ CURLcode res = curl_easy_perform(curl);
+ if (res != CURLE_OK)
+ return luaL_error(L, "curl error accessing %s: %s", url, curl_easy_strerror(res));
+ curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response_code);
+ if (response_code != 200)
+ return luaL_error(L, "curl error accessing %s, non-200 response code: %d", url, response_code);
+ luaL_pushresult(&B);
+ lua_newtable(L);
+ }
+ return 2;
+}
+
+
+static const luaL_Reg system_lib[] = {
+ { "ls", lpm_ls }, // Returns an array of files.
+ { "stat", lpm_stat }, // Returns info about a single file.
+ { "mkdir", lpm_mkdir }, // Makes a directory.
+ { "rmdir", lpm_rmdir }, // Removes a directory.
+ { "hash", lpm_hash }, // Returns a hex sha256 hash.
+ { "symlink", lpm_symlink }, // Creates a symlink.
+ { "chmod", lpm_chmod }, // Chmod's a file.
+ { "init", lpm_init }, // Initializes a git repository with the specified remote.
+ { "fetch", lpm_fetch }, // Updates a git repository with the specified remote.
+ { "reset", lpm_reset }, // Updates a git repository to the specified commit/hash/branch.
+ { "get", lpm_get }, // HTTP(s) GET request.
+ { "extract", lpm_extract }, // Extracts .tar.gz, and .zip files.
+ { "certs", lpm_certs }, // Sets the SSL certificate chain folder/file.
+ { NULL, NULL }
+};
+
+
+#ifndef LPM_VERSION
+ #define LPM_VERSION "unknown"
+#endif
+
+
+#ifndef LITE_ARCH_TUPLE
+ #if __x86_64__ || _WIN64 || __MINGW64__
+ #define ARCH_PROCESSOR "x86_64"
+ #else
+ #define ARCH_PROCESSOR "x86"
+ #endif
+ #if _WIN32
+ #define ARCH_PLATFORM "windows"
+ #elif __linux__
+ #define ARCH_PLATFORM "linux"
+ #elif __APPLE__
+ #define ARCH_PLATFORM "darwin"
+ #else
+ #error "Please define -DLITE_ARCH_TUPLE."
+ #endif
+ #define LITE_ARCH_TUPLE ARCH_PROCESSOR "-" ARCH_PLATFORM
+#endif
+
+
+extern const char lpm_lua[];
+extern unsigned int lpm_lua_len;
+int main(int argc, char* argv[]) {
+ curl = curl_easy_init();
+ if (!curl)
+ return -1;
+ git_libgit2_init();
+ lua_State* L = luaL_newstate();
+ luaL_openlibs(L);
+ luaL_newlib(L, system_lib);
+ lua_setglobal(L, "system");
+ lua_newtable(L);
+ for (int i = 0; i < argc; ++i) {
+ lua_pushstring(L, argv[i]);
+ lua_rawseti(L, -2, i+1);
+ }
+ lua_setglobal(L, "ARGV");
+ lua_pushliteral(L, LPM_VERSION);
+ lua_setglobal(L, "VERSION");
+ #if _WIN32
+ lua_pushliteral(L, "windows");
+ lua_pushliteral(L, "\\");
+ #else
+ lua_pushliteral(L, "posix");
+ lua_pushliteral(L, "/");
+ #endif
+ lua_setglobal(L, "PATHSEP");
+ lua_setglobal(L, "PLATFORM");
+ lua_pushliteral(L, LITE_ARCH_TUPLE);
+ lua_setglobal(L, "ARCH");
+ #if LPM_LIVE
+ if (luaL_loadfile(L, "lpm.lua") || lua_pcall(L, 0, 1, 0)) {
+ #else
+ if (luaL_loadbuffer(L, lpm_lua, lpm_lua_len, "lpm.lua") || lua_pcall(L, 0, 1, 0)) {
+ #endif
+ fprintf(stderr, "internal error when starting the application: %s\n", lua_tostring(L, -1));
+ return -1;
+ }
+ int status = lua_tointeger(L, -1);
+ lua_close(L);
+ git_libgit2_shutdown();
+ curl_easy_cleanup(curl);
+ return status;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 10:45:38 +0000