feat: watch: init
This commit is contained in:
152
package/c/watch/main.c
Executable file
152
package/c/watch/main.c
Executable file
@@ -0,0 +1,152 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/select.h>
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#include <time.h>
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#include <ctype.h>
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#include <limits.h>
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#define MAX_FILES 1024
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#define POLL_INTERVAL_MS 100 // milliseconds
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void print_usage(const char *prog_name) {
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fprintf(stderr, "Usage: %s <command> <file1> [file2] ...\n", prog_name);
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fprintf(stderr, " or: find <pattern> | %s <command>\n", prog_name);
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exit(EXIT_FAILURE);
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}
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struct file_info {
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char *path;
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time_t last_mtime;
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struct stat st;
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};
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int check_file_modified(struct file_info *file) {
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struct stat new_st;
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if (stat(file->path, &new_st) != 0) {
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perror("stat");
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return -1;
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}
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// Check if file was modified
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if (new_st.st_mtime != file->st.st_mtime) {
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file->st = new_st;
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return 1;
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}
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return 0;
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}
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int main(int argc, char *argv[]) {
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if (argc < 2) {
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print_usage(argv[0]);
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}
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char *command = argv[1];
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struct file_info files[MAX_FILES];
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int num_files = 0;
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// Check if we're getting input from stdin (find command)
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if (!isatty(fileno(stdin))) {
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// Read files from stdin
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char line[PATH_MAX];
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while (fgets(line, sizeof(line), stdin) && num_files < MAX_FILES) {
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// Remove newline and any whitespace
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line[strcspn(line, "\n")] = 0;
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char *end = line + strlen(line) - 1;
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while (end >= line && isspace(*end)) end--;
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*(end + 1) = 0;
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if (strlen(line) > 0) {
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files[num_files].path = strdup(line);
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if (!files[num_files].path) {
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perror("strdup");
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exit(EXIT_FAILURE);
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}
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if (stat(files[num_files].path, &files[num_files].st) != 0) {
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perror("stat");
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fprintf(stderr, "Skipping invalid path: %s\n", line);
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free(files[num_files].path);
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continue;
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}
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num_files++;
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}
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}
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} else {
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// No stdin input, use command line arguments
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if (argc < 3) {
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print_usage(argv[0]);
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}
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for (int i = 2; i < argc && num_files < MAX_FILES; i++) {
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files[num_files].path = strdup(argv[i]);
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if (!files[num_files].path) {
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perror("strdup");
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exit(EXIT_FAILURE);
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}
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if (stat(files[num_files].path, &files[num_files].st) != 0) {
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perror("stat");
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fprintf(stderr, "Skipping invalid path: %s\n", argv[i]);
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free(files[num_files].path);
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continue;
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}
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num_files++;
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}
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}
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if (num_files == 0) {
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fprintf(stderr, "No files to watch\n");
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exit(EXIT_FAILURE);
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}
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// Print the files we're watching
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fprintf(stderr, "Watching %d files:\n", num_files);
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for (int i = 0; i < num_files; i++) {
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fprintf(stderr, " %s\n", files[i].path);
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}
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fprintf(stderr, "Waiting for file modifications...\n");
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = POLL_INTERVAL_MS * 1000; // Convert to microseconds
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while (1) {
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// Use select to wait for the specified interval
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select(0, NULL, NULL, NULL, &tv);
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int any_modified = 0;
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for (int i = 0; i < num_files; i++) {
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int modified = check_file_modified(&files[i]);
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if (modified > 0) {
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fprintf(stderr, "File modified: %s\n", files[i].path);
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any_modified = 1;
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} else if (modified < 0) {
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fprintf(stderr, "Error checking file: %s\n", files[i].path);
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}
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}
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if (any_modified) {
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fprintf(stderr, "Executing command: %s\n", command);
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int res = system(command);
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if (res != 0) {
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perror("system");
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exit(EXIT_FAILURE);
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}
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}
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// Reset timeout for next iteration
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tv.tv_sec = 0;
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tv.tv_usec = POLL_INTERVAL_MS * 1000;
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}
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// Cleanup
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for (int i = 0; i < num_files; i++) {
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free(files[i].path);
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}
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return 0;
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}
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124
package/c/watch/make.sh
Executable file
124
package/c/watch/make.sh
Executable file
@@ -0,0 +1,124 @@
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#!/bin/sh
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# Usage: make.sh [build|check] [--norun] [--debug] [--color]
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# Options:
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# build Build the library and app (default if no mode is provided).
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# run Build and run the app.
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# check Build tests; runs them unless --norun is specified.
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# --norun (check only) Build tests but do not run them.
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# --debug Build with -O0 (debug mode).
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# --color Pass -fdiagnostics-color=always to compiler.
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# help, --help Show this help message.
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PACKAGE_NAME="watch"
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check_dependencies() {
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for dep in cc gdb; do
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if ! command -v "$dep" >/dev/null 2>&1; then
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echo "Error: Required dependency '$dep' not found." >&2
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exit 1
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fi
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done
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}
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check_dependencies
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print_help() {
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cat <<EOF
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Usage: $0 [build|check] [--norun] [--debug] [--color]
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build Build the library and app (default).
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run Build and run the app.
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check Build tests; runs them unless --norun is specified.
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--norun (check only) Build tests but do not run them.
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--debug Build with debug flags (-O0).
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--color Force colored compiler diagnostics.
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help, --help Display this help message.
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EOF
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}
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# Show help if requested
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case "$1" in
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help|--help)
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print_help
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exit 0
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;;
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esac
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# Default flags
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RUN_TESTS=1
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OPTFLAGS="-O2"
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CFLAGS="-Wall -Wextra -Werror -pedantic -fsanitize=address"
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LDFLAGS="-lhectic"
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STD_FLAGS="-std=c99"
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COLOR_FLAG=""
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MODE="${1:-build}"
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shift
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# Process options
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while [ $# -gt 0 ]; do
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case "$1" in
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--norun)
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RUN_TESTS=0
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;;
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--debug)
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OPTFLAGS="-O0"
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;;
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--color)
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COLOR_FLAG="-fdiagnostics-color=always"
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;;
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--)
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shift
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break
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;;
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*)
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if [ "$MODE" = "run" ]; then
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break
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fi
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echo "Unknown option: $1"
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print_help
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exit 1
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;;
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esac
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shift
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done
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if [ -n "$COLOR_FLAG" ]; then
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CFLAGS="$CFLAGS $COLOR_FLAG"
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fi
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build() {
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mkdir -p target
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echo "# Build app"
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# shellcheck disable=SC2086
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cc $CFLAGS $OPTFLAGS main.c -o "target/$PACKAGE_NAME"
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}
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case "$MODE" in
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build)
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build
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;;
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run)
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build
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if [ -t 0 ]; then
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# No stdin input, run normally
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"./target/$PACKAGE_NAME" "$@"
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else
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# Pass stdin to the program
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"./target/$PACKAGE_NAME" "$@" <&0
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fi
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;;
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check)
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mkdir -p target/test
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for test_file in test/*.c; do
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exe="target/test/$(basename "${test_file%.c}")"
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# shellcheck disable=SC2086
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cc $CFLAGS $OPTFLAGS -pedantic "$test_file" $LDFLAGS -o "$exe"
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if [ "$RUN_TESTS" -eq 1 ]; then
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"$exe"
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fi
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done
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;;
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*)
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print_help
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exit 1
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;;
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esac
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