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343 lines
15 KiB
C++
343 lines
15 KiB
C++
// Copyright 2019 Roman Perepelitsa.
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//
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// This file is part of GitStatus.
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//
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// GitStatus is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GitStatus is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with GitStatus. If not, see <https://www.gnu.org/licenses/>.
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#include "options.h"
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#include <fnmatch.h>
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#include <getopt.h>
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#include <unistd.h>
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#include <algorithm>
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#include <climits>
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#include <cstdlib>
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#include <cstring>
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#include <iostream>
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#include "print.h"
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namespace gitstatus {
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namespace {
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long ParseLong(const char* s) {
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errno = 0;
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char* end = nullptr;
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long res = std::strtol(s, &end, 10);
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if (*end || end == s || errno) {
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std::cerr << "gitstatusd: not an integer: " << s << std::endl;
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std::exit(10);
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}
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return res;
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}
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long ParseInt(const char* s) {
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long res = ParseLong(s);
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if (res < INT_MIN || res > INT_MAX) {
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std::cerr << "gitstatusd: integer out of bounds: " << s << std::endl;
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std::exit(10);
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}
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return res;
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}
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void PrintUsage() {
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std::cout << "Usage: gitstatusd [OPTION]...\n"
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<< "Print machine-readable status of the git repos for directores in stdin.\n"
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<< "\n"
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<< "OPTIONS\n"
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<< " -l, --lock-fd=NUM [default=-1]\n"
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<< " If non-negative, check whether the specified file descriptor is locked when\n"
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<< " not receiving any requests for one second; exit if it isn't locked.\n"
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<< "\n"
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<< " -p, --parent-pid=NUM [default=-1]\n"
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<< " If non-negative, send signal 0 to the specified PID when not receiving any\n"
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<< " requests for one second; exit if signal sending fails.\n"
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<< "\n"
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<< " -t, --num-threads=NUM [default=1]\n"
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<< " Use this many threads to scan git workdir for unstaged and untracked files.\n"
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<< " Empirically, setting this parameter to twice the number of virtual CPU yields\n"
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<< " maximum performance.\n"
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<< "\n"
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<< " -v, --log-level=STR [default=INFO]\n"
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<< " Don't write entires to log whose log level is below this. Log levels in\n"
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<< " increasing order: DEBUG, INFO, WARN, ERROR, FATAL.\n"
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<< "\n"
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<< " -r, --repo-ttl-seconds=NUM [default=3600]\n"
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<< " Close git repositories that haven't been used for this long. This is meant to\n"
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<< " release resources such as memory and file descriptors. The next request for a\n"
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<< " repo that's been closed is much slower than for a repo that hasn't been.\n"
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<< " Negative value means infinity.\n"
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<< "\n"
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<< " -s, --max-num-staged=NUM [default=1]\n"
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<< " Report at most this many staged changes; negative value means infinity.\n"
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<< "\n"
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<< " -u, --max-num-unstaged=NUM [default=1]\n"
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<< " Report at most this many unstaged changes; negative value means infinity.\n"
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<< "\n"
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<< " -d, --max-num-untracked=NUM [default=1]\n"
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<< " Report at most this many untracked files; negative value means infinity.\n"
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<< "\n"
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<< " -m, --dirty-max-index-size=NUM [default=-1]\n"
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<< " If a repo has more files in its index than this, override --max-num-unstaged\n"
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<< " and --max-num-untracked (but not --max-num-staged) with zeros; negative value\n"
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<< " means infinity.\n"
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<< "\n"
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<< " -e, --recurse-untracked-dirs\n"
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<< " Count files within untracked directories like `git status --untracked-files`.\n"
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<< "\n"
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<< " -U, --ignore-status-show-untracked-files\n"
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<< " Unless this option is specified, report zero untracked files for repositories\n"
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<< " with status.showUntrackedFiles = false.\n"
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<< "\n"
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<< " -W, --ignore-bash-show-untracked-files\n"
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<< " Unless this option is specified, report zero untracked files for repositories\n"
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<< " with bash.showUntrackedFiles = false.\n"
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<< "\n"
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<< " -D, --ignore-bash-show-dirty-state\n"
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<< " Unless this option is specified, report zero staged, unstaged and conflicted\n"
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<< " changes for repositories with bash.showDirtyState = false.\n"
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<< "\n"
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<< " -V, --version\n"
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<< " Print gitstatusd version and exit.\n"
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<< "\n"
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<< " -G, --version-glob=STR [default=*]\n"
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<< " Immediately exit with code 11 if gitstatusd version (see --version) doesn't\n"
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<< " does not match the specified pattern. Matching is done with fnmatch(3)\n"
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<< " without flags.\n"
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<< "\n"
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<< " -h, --help\n"
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<< " Display this help and exit.\n"
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<< "\n"
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<< "INPUT\n"
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<< "\n"
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<< " Requests are read from stdin, separated by ascii 30 (record separator). Each\n"
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<< " request is made of the following fields, in the specified order, separated by\n"
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<< " ascii 31 (unit separator):\n"
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<< "\n"
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<< " 1. Request ID. Any string. Can be empty.\n"
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<< " 2. Path to the directory for which git stats are being requested.\n"
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<< " If the first character is ':', it is removed and the remaning path\n"
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<< " is treated as GIT_DIR.\n"
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<< " 3. (Optional) '1' to disable computation of anything that requires reading\n"
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<< " git index; '0' for the default behavior of computing everything.\n"
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<< "\n"
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<< "OUTPUT\n"
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<< "\n"
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<< " For every request read from stdin there is response written to stdout.\n"
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<< " Responses are separated by ascii 30 (record separator). Each response is made\n"
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<< " of the following fields, in the specified order, separated by ascii 31\n"
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<< " (unit separator):\n"
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<< "\n"
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<< " 1. Request id. The same as the first field in the request.\n"
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<< " 2. 0 if the directory isn't a git repo, 1 otherwise. If 0, all the\n"
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<< " following fields are missing.\n"
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<< " 3. Absolute path to the git repository workdir.\n"
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<< " 4. Commit hash that HEAD is pointing to. 40 hex digits.\n"
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<< " 5. Local branch name or empty if not on a branch.\n"
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<< " 6. Upstream branch name. Can be empty.\n"
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<< " 7. The remote name, e.g. \"upstream\" or \"origin\".\n"
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<< " 8. Remote URL. Can be empty.\n"
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<< " 9. Repository state, A.K.A. action. Can be empty.\n"
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<< " 10. The number of files in the index.\n"
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<< " 11. The number of staged changes.\n"
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<< " 12. The number of unstaged changes.\n"
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<< " 13. The number of conflicted changes.\n"
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<< " 14. The number of untracked files.\n"
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<< " 15. Number of commits the current branch is ahead of upstream.\n"
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<< " 16. Number of commits the current branch is behind upstream.\n"
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<< " 17. The number of stashes.\n"
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<< " 18. The last tag (in lexicographical order) that points to the same\n"
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<< " commit as HEAD.\n"
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<< " 19. The number of unstaged deleted files.\n"
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<< " 20. The number of staged new files.\n"
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<< " 21. The number of staged deleted files.\n"
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<< " 22. The push remote name, e.g. \"upstream\" or \"origin\".\n"
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<< " 23. Push remote URL. Can be empty.\n"
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<< " 24. Number of commits the current branch is ahead of push remote.\n"
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<< " 25. Number of commits the current branch is behind push remote.\n"
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<< " 26. Number of files in the index with skip-worktree bit set.\n"
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<< " 27. Number of files in the index with assume-unchanged bit set.\n"
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<< "\n"
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<< "Note: Renamed files are reported as deleted plus new.\n"
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<< "\n"
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<< "EXAMPLE\n"
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<< "\n"
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<< " Send a single request and print response (zsh syntax):\n"
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<< "\n"
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<< " local req_id=id\n"
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<< " local dir=$PWD\n"
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<< " echo -nE $req_id$'\\x1f'$dir$'\\x1e' | ./gitstatusd | {\n"
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<< " local resp\n"
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<< " IFS=$'\\x1f' read -rd $'\\x1e' -A resp && print -lr -- \"${(@qq)resp}\"\n"
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<< " }\n"
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<< "\n"
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<< " Output:"
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<< "\n"
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<< " 'id'\n"
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<< " '1'\n"
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<< " '/home/romka/gitstatus'\n"
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<< " 'bf46bf03dbab7108801b53f8a720caee8464c9c3'\n"
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<< " 'master'\n"
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<< " 'master'\n"
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<< " 'origin'\n"
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<< " 'git@github.com:romkatv/gitstatus.git'\n"
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<< " ''\n"
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<< " '70'\n"
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<< " '1'\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " '2'\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " ''\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " ''\n"
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<< " ''\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " '0'\n"
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<< " '0'\n"
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<< "\n"
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<< "EXIT STATUS\n"
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<< "\n"
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<< " The command returns zero on success (when printing help or on EOF),\n"
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<< " non-zero on failure. In the latter case the output is unspecified.\n"
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<< "\n"
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<< "COPYRIGHT\n"
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<< "\n"
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<< " Copyright 2019 Roman Perepelitsa\n"
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<< " This is free software; see https://github.com/romkatv/gitstatus for copying\n"
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<< " conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR\n"
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<< " A PARTICULAR PURPOSE." << std::endl;
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}
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const char* Version() {
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#define _INTERNAL_GITSTATUS_STRINGIZE(x) _INTERNAL_GITSTATUS_STRINGIZE_I(x)
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#define _INTERNAL_GITSTATUS_STRINGIZE_I(x) #x
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return _INTERNAL_GITSTATUS_STRINGIZE(GITSTATUS_VERSION);
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#undef _INTERNAL_GITSTATUS_STRINGIZE_I
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#undef _INTERNAL_GITSTATUS_STRINGIZE
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}
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} // namespace
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Options ParseOptions(int argc, char** argv) {
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const struct option opts[] = {{"help", no_argument, nullptr, 'h'},
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{"version", no_argument, nullptr, 'V'},
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{"version-glob", no_argument, nullptr, 'G'},
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{"lock-fd", required_argument, nullptr, 'l'},
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{"parent-pid", required_argument, nullptr, 'p'},
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{"num-threads", required_argument, nullptr, 't'},
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{"log-level", required_argument, nullptr, 'v'},
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{"repo-ttl-seconds", required_argument, nullptr, 'r'},
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{"max-num-staged", required_argument, nullptr, 's'},
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{"max-num-unstaged", required_argument, nullptr, 'u'},
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{"max-num-conflicted", required_argument, nullptr, 'c'},
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{"max-num-untracked", required_argument, nullptr, 'd'},
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{"dirty-max-index-size", required_argument, nullptr, 'm'},
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{"recurse-untracked-dirs", no_argument, nullptr, 'e'},
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{"ignore-status-show-untracked-files", no_argument, nullptr, 'U'},
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{"ignore-bash-show-untracked-files", no_argument, nullptr, 'W'},
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{"ignore-bash-show-dirty-state", no_argument, nullptr, 'D'},
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{}};
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Options res;
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while (true) {
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switch (getopt_long(argc, argv, "hVG:l:p:t:v:r:s:u:c:d:m:eUWD", opts, nullptr)) {
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case -1:
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if (optind != argc) {
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std::cerr << "unexpected positional argument: " << argv[optind] << std::endl;
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std::exit(10);
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}
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return res;
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case 'h':
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PrintUsage();
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std::exit(0);
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case 'V':
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std::cout << Version() << std::endl;
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std::exit(0);
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case 'G':
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if (int err = fnmatch(optarg, Version(), 0)) {
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if (err != FNM_NOMATCH) {
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std::cerr << "Cannot match " << Print(Version()) << " against pattern "
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<< Print(optarg) << ": error " << err;
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std::exit(10);
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}
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std::cerr << "Version mismatch. Wanted (pattern): " << Print(optarg)
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<< ". Actual: " << Print(Version()) << "." << std::endl;
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std::exit(11);
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}
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break;
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case 'l':
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res.lock_fd = ParseInt(optarg);
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break;
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case 'p':
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res.parent_pid = ParseInt(optarg);
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break;
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case 'v':
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if (!ParseLogLevel(optarg, res.log_level)) {
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std::cerr << "invalid log level: " << optarg << std::endl;
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std::exit(10);
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}
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break;
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case 'r':
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res.repo_ttl = std::chrono::seconds(ParseLong(optarg));
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break;
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case 't': {
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long n = ParseLong(optarg);
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if (n <= 0) {
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std::cerr << "invalid number of threads: " << n << std::endl;
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std::exit(10);
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}
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res.num_threads = n;
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break;
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}
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case 's':
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res.max_num_staged = ParseLong(optarg);
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break;
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case 'u':
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res.max_num_unstaged = ParseLong(optarg);
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break;
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case 'c':
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res.max_num_conflicted = ParseLong(optarg);
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break;
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case 'd':
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res.max_num_untracked = ParseLong(optarg);
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break;
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case 'm':
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res.dirty_max_index_size = ParseLong(optarg);
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break;
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case 'e':
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res.recurse_untracked_dirs = true;
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break;
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case 'U':
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res.ignore_status_show_untracked_files = true;
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break;
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case 'W':
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res.ignore_bash_show_untracked_files = true;
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break;
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case 'D':
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res.ignore_bash_show_dirty_state = true;
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break;
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default:
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std::exit(10);
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}
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}
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}
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} // namespace gitstatus
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