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|
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <cjson/cJSON.h>
#include "jobs.h"
#include "util.h"
static void output_free(struct output *output);
static int job_output_insert(struct job *j, char *name, char *store_path);
static int job_read_inputdrvs(struct job *job, cJSON *input_drvs);
static int job_read_outputs(struct job *job, cJSON *outputs);
static void output_free(struct output *output)
{
if (output == NULL)
return;
free(output->name);
free(output->store_path);
free(output);
}
static int job_output_insert(struct job *j, char *name, char *store_path)
{
struct output *o;
o = malloc(sizeof(*o));
if (o == NULL) {
print_err("%s", strerror(errno));
return -errno;
}
o->name = name;
o->store_path = store_path;
LIST_INSERT_HEAD(&j->outputs, o, dlist);
return 0;
}
static int job_read_inputdrvs(struct job *job, cJSON *input_drvs)
{
cJSON *output;
struct job *dep_job = NULL;
char *drv_path = NULL;
char *out_name = NULL;
int ret = 0;
for (cJSON *array = input_drvs; array != NULL; array = array->next) {
drv_path = strdup(array->string);
if (drv_path == NULL) {
ret = -EPERM;
goto out_free;
}
ret = job_new(&dep_job, NULL, drv_path);
if (ret < 0)
goto out_free;
cJSON_ArrayForEach (output, array) {
out_name = strdup(output->valuestring);
if (out_name == NULL) {
print_err("%s", strerror(errno));
ret = -errno;
goto out_free;
}
ret = job_output_insert(dep_job, out_name, NULL);
if (ret < 0) {
job_free(dep_job);
goto out_free;
}
}
LIST_INSERT_HEAD(&job->deps, dep_job, dlist);
drv_path = NULL;
out_name = NULL;
dep_job = NULL;
}
out_free:
if (ret < 0) {
free(drv_path);
free(out_name);
job_free(dep_job);
}
return ret;
}
static int job_read_outputs(struct job *job, cJSON *outputs)
{
char *out_name = NULL;
char *out_path = NULL;
int ret = 0;
for (cJSON *i = outputs; i != NULL; i = i->next) {
out_name = strdup(i->string);
if (out_name == NULL) {
ret = -EPERM;
goto out_free;
}
out_path = strdup(i->valuestring);
if (out_path == NULL) {
ret = -EPERM;
goto out_free;
}
ret = job_output_insert(job, out_name, out_path);
if (ret < 0) {
ret = -EPERM;
goto out_free;
}
out_path = NULL;
out_name = NULL;
}
out_free:
if (ret < 0) {
free(out_name);
free(out_path);
}
return 0;
}
int job_read(FILE *stream, struct job **job)
{
cJSON *temp;
char *drv_path = NULL;
struct job *j = NULL;
cJSON *root = NULL;
char *name = NULL;
int ret = 0;
ret = json_streaming_read(stream, &root);
if (ret < 0 || ret == -EOF)
return JOB_READ_EOF;
temp = cJSON_GetObjectItemCaseSensitive(root, "error");
if (cJSON_IsString(temp)) {
puts(temp->valuestring);
ret = JOB_READ_EVAL_ERR;
goto out_free;
}
temp = cJSON_GetObjectItemCaseSensitive(root, "name");
if (!cJSON_IsString(temp)) {
ret = JOB_READ_JSON_INVAL;
goto out_free;
}
name = strdup(temp->valuestring);
if (name == NULL) {
ret = -errno;
print_err("%s", strerror(errno));
goto out_free;
}
temp = cJSON_GetObjectItemCaseSensitive(root, "drvPath");
if (!cJSON_IsString(temp)) {
free(name);
ret = JOB_READ_JSON_INVAL;
goto out_free;
}
drv_path = strdup(temp->valuestring);
if (drv_path == NULL) {
free(name);
print_err("%s", strerror(errno));
ret = -errno;
goto out_free;
}
ret = job_new(&j, name, drv_path);
if (ret < 0)
goto out_free;
temp = cJSON_GetObjectItemCaseSensitive(root, "inputDrvs");
if (!cJSON_IsObject(temp)) {
ret = JOB_READ_JSON_INVAL;
goto out_free;
}
ret = job_read_inputdrvs(j, temp->child);
if (ret < 0)
goto out_free;
temp = cJSON_GetObjectItemCaseSensitive(root, "outputs");
if (!cJSON_IsObject(temp)) {
ret = JOB_READ_JSON_INVAL;
goto out_free;
}
ret = job_read_outputs(j, temp->child);
if (ret < 0)
goto out_free;
out_free:
cJSON_Delete(root);
if (ret != JOB_READ_SUCCESS)
job_free(j);
else
*job = j;
if (ret == JOB_READ_JSON_INVAL)
print_err("%s", "Invalid JSON");
return ret;
}
void job_free(struct job *job)
{
struct job *j;
struct output *o;
if (job == NULL)
return;
free(job->name);
free(job->drv_path);
LIST_FOREACH (o, &job->outputs, dlist)
output_free(o);
LIST_FOREACH (j, &job->deps, dlist)
job_free(j);
free(job);
}
int job_new(struct job **j, char *name, char *drv_path)
{
struct job *job;
job = malloc(sizeof(*job));
if (job == NULL) {
print_err("%s", strerror(errno));
return -errno;
}
job->name = name;
job->drv_path = drv_path;
LIST_INIT(&job->deps);
LIST_INIT(&job->outputs);
*j = job;
return 0;
}
int jobs_init(FILE **stream)
{
int ret;
/* TODO: proproperly handle args */
char *const args[] = {
"nix-eval-jobs",
"<nixpkgs>",
NULL,
};
/* the package is wrapProgram-ed with nix-eval-jobs */
ret = vpopen(stream, "nix-eval-jobs", args);
return ret;
}
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