94 lines
2.3 KiB
Plaintext
94 lines
2.3 KiB
Plaintext
use std.runtime;
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use std.os;
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use std.io;
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use std.unix;
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use std.subprocess;
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runtime.windows.set_utf8_output();
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var os_time = func() {
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return "\e[33;1m[" ~ os.time() ~ "]\e[0m ";
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}
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var err_hd = func() {
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return "\e[91;1m[error]\e[0m ";
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}
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var info_hd = func() {
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return "\e[96;1m[info]\e[0m ";
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}
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var modified_hd = func() {
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return "\e[92;1m[modified]\e[0m ";
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}
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var usage = func() {
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println(
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os_time(),
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info_hd(),
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"usage: nasal watchdog.nas <filename> [\"argv\"]"
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);
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}
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var argv = runtime.argv();
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if (size(argv)<1) {
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println(os_time(), err_hd(), "need correct file path to watch");
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usage();
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exit(-1);
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}
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var filename = argv[0];
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if (!io.exists(filename)) {
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println(os_time(), err_hd(), "file <", filename, "> does not exist");
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usage();
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exit(-1);
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}
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var args = [];
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if (size(argv)==2) {
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println(os_time(), info_hd(), "with argument(s) ", argv[1]);
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args = split(" ", argv[1]);
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}
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var modified_time = io.fstat(filename).st_mtime;
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println(os_time(), info_hd(), "watching ", filename, " ..");
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while (1) {
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unix.sleep(1);
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if (!io.exists(filename)) {
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println(os_time(), err_hd(), "file <", filename, "> does not exist");
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break;
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}
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var latest_modified_time = io.fstat(filename).st_mtime;
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if (latest_modified_time!=modified_time) {
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modified_time = latest_modified_time;
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println(os_time(), modified_hd(), filename);
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var cmd = "nasal " ~ filename;
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foreach(var i; args) {
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cmd ~= " " ~ i;
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}
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println(os_time(), info_hd(), "executing command \"", cmd, "\"");
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var subproc = subprocess.create(["nasal", filename] ~ args);
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# check if active every 0.5s
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var exited = false;
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while (1) {
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unix.sleep(0.5);
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if (!subprocess.active(subproc)) {
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exited = true;
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break;
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}
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if (io.fstat(filename).st_mtime!=modified_time) {
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println(os_time(), modified_hd(), "file changed, reloading..");
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break;
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}
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}
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# get return value
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var ret = subprocess.terminate(subproc);
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println(os_time(), ret!=0? err_hd():info_hd(), "process returned ", ret);
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}
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} |