Unit tests (#12)

* Change return value of conda_setup_headless() from void to int

* Replace exit() with return;

* Return early if unpacking the micromamba binary fails

* Exit program when pointer to INIFILE is NULL.

* Validation function cannot otherwise proceed

* The way the logic is set up I've decided to duplicate the installation code for now until I find time to revise it

* The only meaningful difference between a "fresh start" and reusing the conda installation is a rmtree().

* Exposes STASIS_DOWNLOAD_TIMEOUT environment variable

* Sets the connection timeout for libcurl to 30, instead of 300.

* Export ini_section_create() function

* Add download() tests

* Add conda_*() tests

* Add boilerplate source file for test framework

* Fixes segfault reported by @GeorgeJCleary (#10)

* The key is now an array index. When key is -1, the env variable is not defined.

* Free resources only when continue on error is disabled (#11)

* Fix segfault due to premature shutdown/cleanup

* If conda_setup_headless cannot succeed, die

* Set STASIS_SYSCONFDIR for tests

1 files changed, 11 insertions, 6 deletions

diff --git a/src/conda.c b/src/conda.c
index 976bbbc..7aaec77 100644
--- a/src/conda.c
+++ b/src/conda.c
@@ -35,7 +35,10 @@ int micromamba(struct MicromambaInfo *info, char *command, ...) {
         char untarcmd[PATH_MAX * 2];
         mkdirs(info->micromamba_prefix, 0755);
         sprintf(untarcmd, "tar -xvf %s -C %s --strip-components=1 bin/micromamba 1>/dev/null", installer_path, info->micromamba_prefix);
-        system(untarcmd);
+        int untarcmd_status = system(untarcmd);
+        if (untarcmd_status) {
+            return -1;
+        }
     }
 
     char cmd[STASIS_BUFSIZ];
@@ -249,7 +252,7 @@ int conda_check_required() {
     return 0;
 }
 
-void conda_setup_headless() {
+int conda_setup_headless() {
     if (globals.verbose) {
         conda_exec("config --system --set quiet false");
     } else {
@@ -285,7 +288,7 @@ void conda_setup_headless() {
 
         if (conda_exec(cmd)) {
             msg(STASIS_MSG_ERROR | STASIS_MSG_L2, "Unable to install user-defined base packages (conda)\n");
-            exit(1);
+            return 1;
         }
     }
 
@@ -307,7 +310,7 @@ void conda_setup_headless() {
 
         if (pip_exec(cmd)) {
             msg(STASIS_MSG_ERROR | STASIS_MSG_L2, "Unable to install user-defined base packages (pip)\n");
-            exit(1);
+            return 1;
         }
     }
 
@@ -315,15 +318,17 @@ void conda_setup_headless() {
         msg(STASIS_MSG_ERROR | STASIS_MSG_L2, "Your STASIS configuration lacks the bare"
                                                   " minimum software required to build conda packages."
                                                   " Please fix it.\n");
-        exit(1);
+        return 1;
     }
 
     if (globals.always_update_base_environment) {
         if (conda_exec("update --all")) {
             fprintf(stderr, "conda update was unsuccessful\n");
-            exit(1);
+            return 1;
         }
     }
+
+    return 0;
 }
 
 int conda_env_create_from_uri(char *name, char *uri) {