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#define _GNU_SOURCE
#include <ctype.h>
#include <getopt.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
static char *outdir = NULL;
static char *branches_to_test = NULL;
#define die(msg, ...) \
do { \
fprintf(stderr, msg "\n", ##__VA_ARGS__); \
exit(EXIT_FAILURE); \
} while (0)
static char *mprintf(const char *fmt, ...)
{
va_list args;
char *str;
int ret;
va_start(args, fmt);
ret = vasprintf(&str, fmt, args);
va_end(args);
if (ret < 0)
die("insufficient memory");
return str;
}
static void strim(char *line)
{
char *p = line;
while (isalnum(*p))
p++;
*p = 0;
}
static char *test_basename(char *str)
{
char *p = strrchr(str, '/');
char *ret = strdup(p ? p + 1 : str);
p = strstr(ret, ".ktest");
if (p)
*p = 0;
return ret;
}
static void branch_get_next_commit_and_test(char *branch,
char **ret_commit,
char *test,
unsigned *age)
{
char *cmd = mprintf("git log --pretty=format:%H %s", branch);
FILE *commits = popen(cmd, "r");
char *commit = NULL;
size_t n = 0;
ssize_t len;
*age = 0;
while ((len = getline(&commit, &n, commits)) >= 0) {
strim(commit);
char *lockfile = mprintf("%s/%s/%s", outdir, commit, test);
bool exists = access(lockfile, F_OK) == 0;
free(lockfile);
if (!exists) {
*ret_commit = strdup(commit);
goto success;
}
(*age)++;
}
fprintf(stderr, "error looking up commits on branch %s\n", branch);
success:
fclose(commits);
free(commit);
free(cmd);
}
static void get_best_branch_commit_test(char **ret_branch,
char **ret_commit,
char **ret_test)
{
FILE *branches = fopen(branches_to_test, "r");
char *line = NULL;
size_t n = 0;
ssize_t len;
unsigned best_age = 0;
if (!branches)
die("error opening %s: %m", branches_to_test);
*ret_branch = NULL;
*ret_commit = NULL;
*ret_test = NULL;
while ((len = getline(&line, &n, branches)) >= 0) {
char *commit = NULL;
char *branch = strtok(line, " \t\n");
char *test = strtok(NULL, " \t\n");
char *testname;
unsigned age;
if (!branch || !test)
continue;
testname = test_basename(test);
//fprintf(stderr, "branch %s test %s\n", branch, test);
branch_get_next_commit_and_test(branch, &commit, testname, &age);
free(testname);
if (!*ret_branch || age < best_age) {
free(*ret_branch);
free(*ret_commit);
free(*ret_test);
*ret_branch = strdup(branch);
*ret_test = strdup(test);
*ret_commit = commit;
best_age = age;
}
}
if (!*ret_branch)
die("Nothing found");
fclose(branches);
free(line);
}
void usage(void)
{
puts("get-test-job: get a test job and create lockfile");
exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
char *branch, *commit, *test, *testname;
bool created;
int opt;
while ((opt = getopt(argc, argv, "b:o:")) != -1) {
switch (opt) {
case 'b':
branches_to_test = strdup(optarg);
break;
case 'o':
outdir = strdup(optarg);
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
case '?':
usage();
exit(EXIT_FAILURE);
}
}
if (!branches_to_test || !outdir)
die("required argument missing");
do {
get_best_branch_commit_test(&branch, &commit, &test);
//fprintf(stderr, "got %s %s %s\n", branch, commit, test);
char *commitdir = mprintf("%s/%s", outdir, commit);
mkdir(commitdir, 0755);
testname = test_basename(test);
char *lockfile = mprintf("%s/%s", commitdir, testname);
//fprintf(stderr, "lockfile %s\n", lockfile);
int fd = open(lockfile, O_RDWR|O_CREAT|O_EXCL, 0644);
fprintf(stderr, "fd %i\n", fd);
created = fd >= 0;
free(commitdir);
free(lockfile);
} while (!created);
printf("%s %s %s\n", branch, commit, test);
}
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