From 0f3997d6ff2d25c0941824ec3daa3c8e767bd73e Mon Sep 17 00:00:00 2001 From: Aargh Rai Date: Tue, 20 Oct 2026 11:20:15 +0530 Subject: wrote the entire thing using libgit2 --- .backupignore | 68 +++++++++++++++++++ .clangd | 3 + .envrc | 12 ---- .gitignore | 11 ---- CMakeLists.txt | 14 ---- LICENSE | 21 ------ README.md | 23 ------- backbencher | Bin 0 -> 18840 bytes build.c | 126 +++++++++++++++++++++++++++++++++++ devenv.lock | 103 ----------------------------- devenv.nix | 8 --- devenv.yaml | 15 ----- src/backup.c | 173 ------------------------------------------------- src/backup_streamer.c | 54 +++++++++++++++ src/config.c | 24 ------- src/ignore.c | 66 ------------------- src/lib.h | 61 +++++++++++------ src/main.c | 143 +++++++++------------------------------- src/recursive_reader.c | 21 ++++++ src/tmp_repo.c | 72 ++++++++++++++++++++ 20 files changed, 417 insertions(+), 601 deletions(-) create mode 100644 .backupignore create mode 100644 .clangd delete mode 100755 .envrc mode change 100755 => 100644 .gitignore delete mode 100755 CMakeLists.txt delete mode 100755 LICENSE delete mode 100755 README.md create mode 100755 backbencher create mode 100644 build.c delete mode 100755 devenv.lock delete mode 100755 devenv.nix delete mode 100755 devenv.yaml delete mode 100644 src/backup.c create mode 100644 src/backup_streamer.c delete mode 100644 src/config.c delete mode 100644 src/ignore.c mode change 100755 => 100644 src/lib.h mode change 100755 => 100644 src/main.c create mode 100644 src/recursive_reader.c create mode 100644 src/tmp_repo.c diff --git a/.backupignore b/.backupignore new file mode 100644 index 0000000..15aa790 --- /dev/null +++ b/.backupignore @@ -0,0 +1,68 @@ +node_modules/ +__pycache__/ +target/ +.next/ +dist/ +build/ +*.iso + +.authinfo +backp/ +.bash_history +.bash_logout +.bun +.cache/ +.cargo/ +.config/ +# Desktop +# dev +.dmrc +.docker +# Documents +# Downloads +.face +.face.icon +# .gitconfig +# .gitconfig-local +# .gitconfig-org +.gnupg +go +.ICEauthority +.lesshst +.local +# Mail +# .mbsyncrc +# Music +.node_repl_history +.npm +.nv +.nvidia-settings-rc +.nvm +.omp +opt +# orgs +# .password-store +# Pictures +.pki +prep +.profile +Public +.pyenv +.python_history +.rustup +.sentry-native +# .ssh +.steam +!.steam/debian-installation/steamapps/common/assettocorsa/content/cars +!.steam/debian-installation/steamapps/common/assettocorsa/content/tracks +.steampath +.steampid +.sudo_as_admin_successful +Templates +.var +# Videos +.wget-hsts +.Xauthority +.xsession +.xsession-errors +.xsession-errors.old diff --git a/.clangd b/.clangd new file mode 100644 index 0000000..01b6d82 --- /dev/null +++ b/.clangd @@ -0,0 +1,3 @@ +CompileFlags: + Add: + - -lgit2 diff --git a/.envrc b/.envrc deleted file mode 100755 index cc5c18b..0000000 --- a/.envrc +++ /dev/null @@ -1,12 +0,0 @@ -#!/usr/bin/env bash - -export DIRENV_WARN_TIMEOUT=20s - -eval "$(devenv direnvrc)" - -# `use devenv` supports the same options as the `devenv shell` command. -# -# To silence all output, use `--quiet`. -# -# Example usage: use devenv --quiet --impure --option services.postgres.enable:bool true -use devenv diff --git a/.gitignore b/.gitignore old mode 100755 new mode 100644 index 60bb522..378eac2 --- a/.gitignore +++ b/.gitignore @@ -1,12 +1 @@ -# Devenv -.devenv* -devenv.local.nix -devenv.local.yaml - -# direnv -.direnv - -# pre-commit -.pre-commit-config.yaml - build diff --git a/CMakeLists.txt b/CMakeLists.txt deleted file mode 100755 index 0125655..0000000 --- a/CMakeLists.txt +++ /dev/null @@ -1,14 +0,0 @@ -cmake_minimum_required(VERSION 3.10) -project(backbencher) - -file(GLOB SOURCES "src/**/*.c") -file(GLOB SRC_FILES "src/*.c") -set(SOURCES ${SOURCES} ${SRC_FILES}) - -if(SOURCES) - add_executable(backbencher ${SOURCES}) -else() - message(FATAL_ERROR "No .c files found in source") -endif() - -target_compile_options(backbencher PRIVATE -Ofast) diff --git a/LICENSE b/LICENSE deleted file mode 100755 index 1b40a2e..0000000 --- a/LICENSE +++ /dev/null @@ -1,21 +0,0 @@ -MIT License - -Copyright (c) 2025 Aargh Rai - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. diff --git a/README.md b/README.md deleted file mode 100755 index 35e8b23..0000000 --- a/README.md +++ /dev/null @@ -1,23 +0,0 @@ -## Backbencher - -Backup your files -Currently only UNIX compliant - -### Usage -```bash -backbencher [OPTIONS] [input] -``` - -### Arguments -- `[input]...` - The path of the folder to backup - -### Options -```bash --i, --ignore-file Specify which files to exclude - (default: ~/.config/backbencher/.backupignore) - --h, --help Print help --v, --verbose Verbose logging --V, --version Print version -``` diff --git a/backbencher b/backbencher new file mode 100755 index 0000000..308bea5 Binary files /dev/null and b/backbencher differ diff --git a/build.c b/build.c new file mode 100644 index 0000000..8fc29be --- /dev/null +++ b/build.c @@ -0,0 +1,126 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RELEASE_MODE + +#ifdef RELEASE_MODE +#define CC "gcc", "-O3" +#else +#define CC "gcc", "-fsanitize=address", "-g" +#endif + +#define EXE_NAME "backbencher" + +int status; + +#define RUN_CMD(...) do { \ + if (fork() == 0) { \ + char* args[] = __VA_ARGS__; \ + print_cmd(args); \ + execvp(args[0], args); \ + return 0; \ + } else { \ + wait(&status); \ + } \ +} while (0); + +void print_cmd(char** args) { + int i = 0; + while (args[i] != NULL) { + printf("%s ", args[i++]); + } + printf("\n"); +} + +// https://github.com/tsoding/nob.h/blob/0a08926d8094fc4ae678155c5d73ae21d1f96f3f/nob.h#L2413 +int needs_rebuild(char* bin_file, char* source_file) { + struct stat statbuf = {0}; + if (stat(bin_file, &statbuf) < 0) { + if (errno == ENOENT) return 1; + return -1; + } + time_t output_path_time = statbuf.st_mtime; + + if (stat(source_file, &statbuf) < 0) { + fprintf(stderr, "could not stat %s: %s", source_file, strerror(errno)); + return -1; + } + + time_t input_path_time = statbuf.st_mtime; + return input_path_time > output_path_time; +} + +void getlibgit2(char *output, int output_max_size) { + int link[2]; + pid_t pid; + + pipe(link); + pid = fork(); + + if (pid == 0) { + dup2(link[1], STDOUT_FILENO); + close(link[0]); + close(link[1]); + execl("/usr/bin/pkg-config", "--cflags", "--libs", "libgit2", (char*)0); + exit(0); + } + + close(link[1]); + int nbytes = read(link[0], output, output_max_size); + wait(NULL); + + int i = -1; + while (++i < nbytes) { + if (output[i] >= 32) continue; + nbytes = i - 1; + break; + } + output[nbytes] = 0; + return; +} + +int main(int argc, char** argv) { + if (needs_rebuild(argv[0], __FILE__)) { + RUN_CMD({CC, __FILE__, "-o", argv[0], NULL}); + if (status != 0) { + // cc error + return 0; + } + print_cmd(argv); + execvp(argv[0], argv); + } + + if (argc >= 2 && strcmp(argv[1], "install") == 0) { + printf("install -m 755 " EXE_NAME " /usr/local/bin/" EXE_NAME); + char dest[PATH_MAX]; + snprintf(dest, sizeof(dest), "/usr/local/bin/%s", EXE_NAME); + char *install_args[] = {"install", "-m", "755", EXE_NAME, dest, NULL}; + execvp("install", install_args); + perror("execvp"); + return 0; + } + if (argc >= 2 && strcmp(argv[1], "release") == 0) { + char libgit[4096]; + getlibgit2(libgit, 4096); + RUN_CMD({CC, "src/main.c", libgit, "-o", EXE_NAME, "-O3", NULL}); + return 0; + } + + char libgit[4096]; + getlibgit2(libgit, 4096); + RUN_CMD({CC, "src/main.c", libgit, "-o", EXE_NAME, NULL}); + + if (status == 0 && argc >= 2) { + argv[1] = malloc(1024); + strncpy(argv[1], "./" EXE_NAME, 1024); + print_cmd(argv + 1); + execvp(argv[1], argv + 1); + } +} diff --git a/devenv.lock b/devenv.lock deleted file mode 100755 index 1dcb611..0000000 --- a/devenv.lock +++ /dev/null @@ -1,103 +0,0 @@ -{ - "nodes": { - "devenv": { - "locked": { - "dir": "src/modules", - "lastModified": 1765463314, - "owner": "cachix", - "repo": "devenv", - "rev": "ec805a5ad3e3ffb6d47d05c078a60db2e636fac4", - "type": "github" - }, - "original": { - "dir": "src/modules", - "owner": "cachix", - "repo": "devenv", - "type": "github" - } - }, - "flake-compat": { - "flake": false, - "locked": { - "lastModified": 1765121682, - "owner": "edolstra", - "repo": "flake-compat", - "rev": "65f23138d8d09a92e30f1e5c87611b23ef451bf3", - "type": "github" - }, - "original": { - "owner": "edolstra", - "repo": "flake-compat", - "type": "github" - } - }, - "git-hooks": { - "inputs": { - "flake-compat": "flake-compat", - "gitignore": "gitignore", - "nixpkgs": [ - "nixpkgs" - ] - }, - "locked": { - "lastModified": 1765464257, - "owner": "cachix", - "repo": "git-hooks.nix", - "rev": "09e45f2598e1a8499c3594fe11ec2943f34fe509", - "type": "github" - }, - "original": { - "owner": "cachix", - "repo": "git-hooks.nix", - "type": "github" - } - }, - "gitignore": { - "inputs": { - "nixpkgs": [ - "git-hooks", - "nixpkgs" - ] - }, - "locked": { - "lastModified": 1762808025, - "owner": "hercules-ci", - "repo": "gitignore.nix", - "rev": "cb5e3fdca1de58ccbc3ef53de65bd372b48f567c", - "type": "github" - }, - "original": { - "owner": "hercules-ci", - "repo": "gitignore.nix", - "type": "github" - } - }, - "nixpkgs": { - "locked": { - "lastModified": 1764580874, - "owner": "cachix", - "repo": "devenv-nixpkgs", - "rev": "dcf61356c3ab25f1362b4a4428a6d871e84f1d1d", - "type": "github" - }, - "original": { - "owner": "cachix", - "ref": "rolling", - "repo": "devenv-nixpkgs", - "type": "github" - } - }, - "root": { - "inputs": { - "devenv": "devenv", - "git-hooks": "git-hooks", - "nixpkgs": "nixpkgs", - "pre-commit-hooks": [ - "git-hooks" - ] - } - } - }, - "root": "root", - "version": 7 -} diff --git a/devenv.nix b/devenv.nix deleted file mode 100755 index b8babeb..0000000 --- a/devenv.nix +++ /dev/null @@ -1,8 +0,0 @@ -{ pkgs, lib, config, inputs, ... }: - -{ - packages = with pkgs; [ git gcc gnumake cmake ]; - enterShell = '' - git --version # Use packages - ''; -} diff --git a/devenv.yaml b/devenv.yaml deleted file mode 100755 index 116a2ad..0000000 --- a/devenv.yaml +++ /dev/null @@ -1,15 +0,0 @@ -# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json -inputs: - nixpkgs: - url: github:cachix/devenv-nixpkgs/rolling - -# If you're using non-OSS software, you can set allowUnfree to true. -# allowUnfree: true - -# If you're willing to use a package that's vulnerable -# permittedInsecurePackages: -# - "openssl-1.1.1w" - -# If you have more than one devenv you can merge them -#imports: -# - ./backend diff --git a/src/backup.c b/src/backup.c deleted file mode 100644 index 060777c..0000000 --- a/src/backup.c +++ /dev/null @@ -1,173 +0,0 @@ -#include "lib.h" -#include -#include - -int check_path_type(const char* path) { - struct stat path_stat; - if (stat(path, &path_stat) != 0) { - return path_type_unknown; - } - if (S_ISDIR(path_stat.st_mode)) { - return path_type_directory; - } - return path_type_file; -} - -int follows_ignore_rules(char* path, char* ignore_line) { - char lastbitofthepath[PATH_MAX]; - int k = 0; - for (int i = 0; path[i] != 0; i++) { - if (path[i] == '/') { - lastbitofthepath[k] = 0; - k = 0; - continue; - } - lastbitofthepath[k++] = path[i]; - } - if (k != 0 && lastbitofthepath[k] != 0) { - lastbitofthepath[k] = 0; - } - - regex_t re; - int ret; - - if (regcomp(&re, ignore_line, REG_EXTENDED) != 0) { - return 0; - } - - ret = regexec(&re, lastbitofthepath, (size_t) 0, NULL, 0); - regfree(&re); - - if (ret == 0) { - return 1; - } else { - return 0; - } -} - -int should_ignore(char* path, char* ignore_instructions, int VERBOSE) { - int i = 0, k = 0; - char line[PATH_MAX]; - while (ignore_instructions[i] != 0) { - if (ignore_instructions[i] != '\n') { - line[k++] = ignore_instructions[i]; - i++; - continue; - } - line[k] = 0; - k = 0; - if (!follows_ignore_rules(path, line)) { - i++; - continue; - } - if (VERBOSE) { - printf("Ignoring %s due to ignore rule %s\n", path, line); - } - return 1; - } - return 0; -} - -void copy_to_backup(char* source_path, int VERBOSE) { - char destination_path[PATH_MAX]; - int index_of_first_slash = -1; - for (int i = 0; i < PATH_MAX; i++) { - if (source_path[i] != '/') continue; - index_of_first_slash = i; - break; - } - - if (index_of_first_slash == -1) { - // I DON'T EVEN KNOW HOW TO HANDLE THIS - fprintf(stderr, "Weird path issue encountered, failed to copy to source\nPath encountered: %s", source_path); - return; - } - - int i = 0; - for (; i < index_of_first_slash; i++) { - destination_path[i] = source_path[i]; - } - destination_path[i++] = '.'; - destination_path[i++] = 'b'; - destination_path[i] = 'k'; - while (++i < PATH_MAX) { - destination_path[i] = source_path[i - 3]; - } - - if (VERBOSE) { - printf("%s -> %s\n", source_path, destination_path); - } - - verify_parent_dirs_exist(destination_path, VERBOSE); - - char command[2 * PATH_MAX + 10]; - snprintf(command, 2 * PATH_MAX + 10, "cp \"%s\" \"%s\"", source_path, destination_path); - system(command); - if (VERBOSE) { - printf("Executing: %s\n", command); - } -} - -void push(char* directories, int cursor, const char* to_add) { - int i = 0; - for (; to_add[i] != 0; i++) { - directories[cursor * PATH_MAX + i] = to_add[i]; - } - while (i < PATH_MAX) { - directories[cursor * PATH_MAX + i++] = 0; - } -} - -void backup(char* target, char* ignore_instructions, int VERBOSE) { - int file_type = check_path_type(target); - if (file_type != path_type_directory) { - fprintf(stderr, "Input not a directory\n"); - return; - } - - int cursor = 0; - char* directories = malloc(PATH_MAX * PATH_MAX * sizeof(*directories)); - push(directories, cursor, target); - while (cursor != -1) { - char* path = &directories[(cursor--) * PATH_MAX]; - DIR* dir_ptr = opendir(path); - if (dir_ptr == NULL) { - fprintf(stderr, "Couldn't open the directory: %s\n", path); - continue; - } - - struct dirent* entry_ptr; - char full_path[PATH_MAX]; - int i = 0; - for (; path[i] != 0; i++) { - full_path[i] = path[i]; - } - full_path[i++] = '/'; - while ((entry_ptr = readdir(dir_ptr)) != NULL) { - if ( - strcmp(entry_ptr->d_name, ".") == 0 || - strcmp(entry_ptr->d_name, "..") == 0 - ) continue; - int j = 0; - for (; entry_ptr->d_name[j] != 0; j++) { - full_path[i + j] = entry_ptr->d_name[j]; - } - full_path[i + j] = 0; - - if (VERBOSE) { - printf("Looking at: %s\n", full_path); - } - if (should_ignore(full_path, ignore_instructions, VERBOSE)) { - continue; - } - - if (entry_ptr->d_type == DT_REG) { - copy_to_backup(full_path, VERBOSE); - continue; - } - push(directories, ++cursor, full_path); - } - closedir(dir_ptr); - } - free(directories); -} diff --git a/src/backup_streamer.c b/src/backup_streamer.c new file mode 100644 index 0000000..3b5929b --- /dev/null +++ b/src/backup_streamer.c @@ -0,0 +1,54 @@ +#include +#include +#include +#include +#include + +#include "lib.h" + +struct backup_streamer backup_streamer_init(char *cwd) { + struct backup_streamer output; + output.cwd_length = strnlen(cwd, PATH_MAX); + char *end = stpncpy(output.to_prefix, cwd, PATH_MAX - 3); + *(end++) = '.'; + *(end++) = 'b'; + *(end++) = 'k'; + *(end++) = 0; + return output; +} + +void get_backup_destination(struct backup_streamer *streamer, char* from) { + char *cursor = stpncpy(streamer->cursor, streamer->to_prefix, PATH_MAX); + from += streamer->cwd_length; + int n = (cursor - streamer->cursor) - 2; + strncpy(cursor, from, PATH_MAX - n); +} + +int is_dir(char *path) { + struct stat info; + if (stat(path, &info) != 0) return -1; + return S_ISDIR(info.st_mode); +} + +void backup_file(char *from, char *to) { + ensure_parents_exist(to); + pid_t pid; + if ((pid = fork()) == 0) { + char *argv[] = {"/usr/bin/cp", from, to, NULL}; + execv(argv[0], argv); + } + assert(waitpid(pid, NULL, 0) != -1); +} + +void ensure_parents_exist(char *path) { + int n = strnlen(path, PATH_MAX); + for (int i = 1; i < n; i++) { + if (path[i] != '/') continue; + path[i] = 0; + if (is_dir(path) == -1) { + debugf("mkdir %s\n", path); + assert(mkdir(path, 0755) != -1); + } + path[i] = '/'; + } +} diff --git a/src/config.c b/src/config.c deleted file mode 100644 index ab0eb05..0000000 --- a/src/config.c +++ /dev/null @@ -1,24 +0,0 @@ -#include "lib.h" -#include -#include - -char config[PATH_MAX] = {0}; -char* get_default_config() { - if (config[0] != 0) return config; - - const char* xdg_config_home = getenv("XDG_CONFIG_HOME"); - const char* home = getenv("HOME"); - - if (home == NULL) { - fprintf(stderr, "HOME environment variable not set, failed to determine the config path"); - return NULL; - } - - if (xdg_config_home != NULL && xdg_config_home[0] != 0) { - snprintf(config, PATH_MAX, "%s/backbencher/.backupignore", xdg_config_home); - } else { - snprintf(config, PATH_MAX, "%s/.config/backbencher/.backupignore", home); - } - - return config; -} diff --git a/src/ignore.c b/src/ignore.c deleted file mode 100644 index fbfb8ed..0000000 --- a/src/ignore.c +++ /dev/null @@ -1,66 +0,0 @@ -#include "lib.h" - -int _; - -void mkdir_if_not_exist(char* path, int VERBOSE) { - if (mkdir(path, S_IRWXU) < 0) return; - if (VERBOSE) { - printf("(Created to create directory %s)", path); - } -} - -void verify_parent_dirs_exist(char* file_path, int VERBOSE) { - for (int i = 0; file_path[i] != 0; i++) { - if (file_path[i] == '/') file_path[i] = 0; - if (file_path[i] != 0) continue; - mkdir_if_not_exist(file_path, VERBOSE); - file_path[i] = '/'; - } -} - -char* get_ignore_file(char* ignore_file, int VERBOSE) { - verify_parent_dirs_exist(ignore_file, VERBOSE); - FILE* file = fopen(ignore_file, "r"); - char* default_config; - - if (file != 0) { - float current_pointer = ftell(file); - fseek(file, 0, SEEK_END); - long int file_size = ftell(file); - fseek(file, current_pointer, SEEK_SET); - - char* contents = malloc(file_size * sizeof(*contents)); - _ = fread(contents, 1, file_size, file); - fclose(file); - - return contents; - } - - if (strcmp(ignore_file, (default_config = get_default_config())) != 0) { - return NULL; - } - - // mainly used for first time running - if (default_config == NULL) { - return NULL; - } - - file = fopen(default_config, "w"); - if (file == 0) { - return NULL; - } - - int content_length = strlen(DEFAULT_CONFIG_CONTENTS); - _ = fwrite(DEFAULT_CONFIG_CONTENTS, 1, content_length, file); - fclose(file); - if (VERBOSE) { - printf("Creating %s\n", default_config); - } - - char* contents = malloc(content_length * sizeof(char)); - for (int i = 0; i < content_length; i++) { - contents[i] = DEFAULT_CONFIG_CONTENTS[i]; - } - return contents; -} - diff --git a/src/lib.h b/src/lib.h old mode 100755 new mode 100644 index 999e7d7..6c098c7 --- a/src/lib.h +++ b/src/lib.h @@ -1,24 +1,47 @@ -#include -#include -#include -#include -#include +#ifndef LIB_H_ +#define LIB_H_ + +#include +#include #include -#include -#define NULL_STR (char*)0 -#define DEFAULT_CONFIG_CONTENTS "^node_modules$\n^target$\n^build$\n^dist$\n^\\.next$\n^\\.output$\n^\\.vercel$\n^\\.wrangler$\n^\\.venv$\n^\\.astro$\n^\\.devenv$\n^__pycache__$" +#define debugf(...) if (debug) (void)printf("[debug] " __VA_ARGS__) + +int is_git_metadata_dir(char *path); + +struct tmp_repo { + git_repository* repo; + char path[70]; +}; +struct tmp_repo tmp_repo_init(); +void tmp_repo_deinit(struct tmp_repo repo); + +int check_for_backupignore(); +void copy_over_backupignore(struct tmp_repo repo); + +int is_ignored(struct tmp_repo repo, char *path); + +struct recursive_reader { + FILE *pfile; + char *line; + size_t capacity; +}; +struct recursive_reader recursive_reader_init(); +int recursive_reader_read(struct recursive_reader *reader); +void recursive_reader_deinit(struct recursive_reader reader); + +struct backup_streamer { + int cwd_length; + char to_prefix[PATH_MAX]; + char cursor[PATH_MAX]; +}; +struct backup_streamer backup_streamer_init(char *cwd); +void get_backup_destination(struct backup_streamer *streamer, char* from); -typedef enum { - path_type_unknown, - path_type_directory, - path_type_file -} path_type; +int is_dir(char *path); +void backup_file(char *from, char *to); +void ensure_parents_exist(char *path); -char* get_default_config(); -char* shift(int* argc, char*** argv); -char* get_ignore_file(char* ignore_file, int VERBOSE); -void mkdir_if_not_exist(char* path, int VERBOSE); -void verify_parent_dirs_exist(char* file_path, int VERBOSE); +int debug; -void backup(char* target, char* ignore_instructions, int VERBOSE); +#endif // LIB_H_ diff --git a/src/main.c b/src/main.c old mode 100755 new mode 100644 index 7d33850..1d419fa --- a/src/main.c +++ b/src/main.c @@ -1,125 +1,44 @@ -#include "lib.h" +#include +#include -#define VERSION "1.0" +#include "lib.h" -void help() { - printf( -"Backup your files\n" -"Usage: Backbencher [OPTIONS] [input]\n" -"Arguments:\n" -"\t[input]... The path of the folder to backup\n" -"Options:\n" -"\t-i --ignore-file Specify which files to exclude\n\t\t(default = ~/.config/backbencher/.backupignore)\n" -"\t-h --help \tPrint help\n" -"\t-v --verbose \tVerbose logging\n" -"\t-V --version \tPrint version\n" - ); -} +int main(int argc, char **argv) { + (void)argv; -void assign(char* to, char* from) { - int i = 0; - for (; from[i] != 0; i++) { - to[i] = from[i]; - } - to[i] = 0; -} + debug = argc > 1; + if (check_for_backupignore()) return 1; + debugf(".backupignore found\n"); -int source_main(int argc, char** argv) { - shift(&argc, &argv); + struct tmp_repo repo = tmp_repo_init(); + assert(repo.repo != NULL); + debugf("%s initialized\n", repo.path); - char* ignore_file = get_default_config(); - char* target = NULL_STR; - int VERBOSE = 0; + copy_over_backupignore(repo); + debugf("ignore file loaded\n"); - while (1) { - char* segment = shift(&argc, &argv); - if (segment == NULL_STR) { - break; - } - else if (segment[0] == '-' && segment[1] == '-') { - if (strcmp(&segment[2], "ignore-file") == 0) { - assign(&ignore_file[0], shift(&argc, &argv)); - if (ignore_file == NULL_STR) { - fprintf(stderr, "Missing for --ignore-file\n"); - return 1; - } - } - else if (strcmp(&segment[2], "help") == 0) { - help(); - return 0; - } - else if (strcmp(&segment[2], "verbose") == 0) { - VERBOSE = 1; - } - else if (strcmp(&segment[2], "version") == 0) { - printf(VERSION); - printf("\n"); - return 0; - } - } else if (segment[0] == '-') { - if (segment[1] == 'i') { - assign(&ignore_file[0], shift(&argc, &argv)); - if (ignore_file == NULL_STR) { - fprintf(stderr, "Missing for --ignore-file\n"); - return 1; - } - } - else if (segment[1] == 'h') { - help(); - return 0; - } - else if (segment[1] == 'v') { - VERBOSE = 1; - } - else if (segment[1] == 'V') { - printf(VERSION); - printf("\n"); - return 0; - } - } else { - target = segment; - } - } + char *cwd = getcwd(NULL, 0); + assert(cwd != NULL); + struct backup_streamer streamer = backup_streamer_init(cwd); + free(cwd); - if (target == NULL_STR) { - fprintf(stderr, "Missing [input] - The folder to backup\n"); - return 1; - } + struct recursive_reader reader = recursive_reader_init(); + while (recursive_reader_read(&reader) != -1) { + if (is_ignored(repo, reader.line)) continue; + if (is_dir(reader.line)) continue; - if (VERBOSE) { - printf("Target folder: %s\n", target); - printf("Using ignore file: %s\n", ignore_file); - printf("Using verbosity: %d\n", VERBOSE); + get_backup_destination(&streamer, reader.line); + debugf("cp %s %s\n", reader.line, streamer.cursor); + backup_file(reader.line, streamer.cursor); } - char* ignore_instructions = get_ignore_file(ignore_file, VERBOSE); - if (ignore_instructions == NULL) { - fprintf(stderr, "I don't have permissions to read the ignore file\n"); - return 1; - } - if (VERBOSE) { - printf("Ignoring rules:\n%s\n", ignore_instructions); - } - - backup(target, ignore_instructions, VERBOSE); - - free(ignore_instructions); + recursive_reader_deinit(reader); + tmp_repo_deinit(repo); + git_repository_free(repo.repo); + git_libgit2_shutdown(); return 0; } -int main(int argc, char** argv) { - int result = source_main(argc, argv); - if (result != 0) { - printf("\n"); - help(); - } - return result; -} - -char* shift(int* argc, char*** argv) { - if (argc == 0) return NULL_STR; - --(*argc); - char* output = **argv; - ++(*argv); - return output; -} +#include "tmp_repo.c" +#include "recursive_reader.c" +#include "backup_streamer.c" diff --git a/src/recursive_reader.c b/src/recursive_reader.c new file mode 100644 index 0000000..0a32131 --- /dev/null +++ b/src/recursive_reader.c @@ -0,0 +1,21 @@ +#include + +#include "lib.h" + +struct recursive_reader recursive_reader_init() { + FILE *pipe = popen("find \"$PWD\" -print", "r"); + assert(pipe != NULL); + return (struct recursive_reader) { pipe, NULL, 0 }; +} + +int recursive_reader_read(struct recursive_reader *reader) { + int n = getline(&reader->line, &reader->capacity, reader->pfile); + reader->line[n - 1] = 0; + return n; +} + +void recursive_reader_deinit(struct recursive_reader reader) { + free(reader.line); + int status = pclose(reader.pfile); + assert(status != -1); +} diff --git a/src/tmp_repo.c b/src/tmp_repo.c new file mode 100644 index 0000000..ff4536c --- /dev/null +++ b/src/tmp_repo.c @@ -0,0 +1,72 @@ +#include +#include +#include +#include +#include + +#include "lib.h" + +struct tmp_repo tmp_repo_init() { + unsigned char rng_bytes[64]; + assert(getrandom(rng_bytes, sizeof(rng_bytes), 0) == sizeof(rng_bytes)); + + char repo_path[70] = "/tmp/"; + for (int i = 0; i < 64; i++) { + repo_path[5 + i] = (char)('a' + rng_bytes[i] % 26); + } + repo_path[69] = '\0'; + + git_libgit2_init(); + + git_repository *repo = NULL; + assert(git_repository_init(&repo, repo_path, 0) == 0); + struct tmp_repo output; + memcpy(output.path, repo_path, 70); + output.repo = repo; + return output; +} + +void tmp_repo_deinit(struct tmp_repo repo) { + pid_t pid; + if ((pid = fork()) == 0) { + char *argv[] = {"/usr/bin/rm", "-rf", repo.path, NULL}; + execv(argv[0], argv); + } + assert(waitpid(pid, NULL, 0) != -1); +} + +int check_for_backupignore() { + FILE *file = fopen(".backupignore", "r"); + if (file == NULL) { + fprintf(stderr, "Missing .backupignore file in the current directory\n"); + return 1; + } else fclose(file); + return 0; +} + +void copy_over_backupignore(struct tmp_repo repo) { + char cp_destination[81]; + snprintf(cp_destination, 81, "%s/.gitignore", repo.path); + + pid_t pid; + if ((pid = fork()) == 0) { + char *argv[] = {"/usr/bin/cp", ".backupignore", cp_destination, NULL}; + execv(argv[0], argv); + } + assert(waitpid(pid, NULL, 0) != -1); +} + +int is_ignored(struct tmp_repo repo, char *path) { + if (is_git_metadata_dir(path)) return 0; + int ignored; + assert(git_ignore_path_is_ignored(&ignored, repo.repo, path) >= 0); + return ignored; +} + +int is_git_metadata_dir(char *path) { + int n = strnlen(path, PATH_MAX); + for (int i = 0; i < n - 6; i++) { + if (strncmp(path + i, "/.git/", 6) == 0) return 1; + } + return 0; +} -- cgit v1.2.3