add some more code

This adds a basic "worker" program.

You can now do something like

    ./server &
    ./worker &
    ./client ci_run URL REV

and the server should pass a message to worker, after which it should
clone the repository at URL, checkout REV, and try to run the CI script.

It's extremely unfinished: I need to sort out the graceful shutdown, how
the server manages workers, etc.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/ci.h b/src/ci.h
new file mode 100644
index 0000000..4267b89
--- /dev/null
+++ b/src/ci.h
@@ -0,0 +1,28 @@
+#ifndef __CI_H__
+#define __CI_H__
+
+typedef enum {
+	RUN_ERROR = -1,
+	RUN_SUCCESS,
+	RUN_FAILURE,
+	RUN_NO,
+} run_result;
+
+run_result ci_run(int *ec);
+
+/*
+ * This is a high-level function. It's basically equivalent to the following
+ * sequence in bash:
+ *
+ *     dir="$( mktemp -d )"
+ *     git clone --no-checkout "$url" "$dir"
+ *     pushd "$dir"
+ *     git checkout "$rev"
+ *     ./ci
+ *     popd
+ *     rm -rf "$dir"
+ *
+ */
+run_result ci_run_git_repo(const char *url, const char *rev, int *ec);
+
+#endif