From 3529fffd7e4e15122090bbd534c27b2f5a3a180c Mon Sep 17 00:00:00 2001
From: sinanmohd <sinan@sinanmohd.com>
Date: Thu, 11 Jul 2024 13:06:42 +0530
Subject: solver/solver_report: init

---
 include/evanix.h    |  1 +
 include/jobs.h      |  1 +
 src/evanix.c        |  6 ++++++
 src/jobs.c          |  1 +
 src/queue.c         | 24 ------------------------
 src/solver_greedy.c | 27 +++++++++++++++++++++++++++
 6 files changed, 36 insertions(+), 24 deletions(-)

diff --git a/include/evanix.h b/include/evanix.h
index 1e24590..46879ad 100644
--- a/include/evanix.h
+++ b/include/evanix.h
@@ -7,6 +7,7 @@ struct evanix_opts_t {
 	bool isflake;
 	bool isdryrun;
 	bool ispipelined;
+	bool solver_report;
 	bool close_unused_fd;
 	char *system;
 	uint32_t max_build;
diff --git a/include/jobs.h b/include/jobs.h
index ccdff65..dc6fc36 100644
--- a/include/jobs.h
+++ b/include/jobs.h
@@ -28,6 +28,7 @@ struct job {
 	/* solver */
 	ssize_t id;
 	bool stale;
+	bool reported;
 };
 CIRCLEQ_HEAD(job_clist, job);
 
diff --git a/src/evanix.c b/src/evanix.c
index b801e73..da2fa1a 100644
--- a/src/evanix.c
+++ b/src/evanix.c
@@ -16,6 +16,7 @@ static const char usage[] =
 	"built.\n"
 	"  -s, --system                    System to build for.\n"
 	"  -m, --max-build                 Max number of builds.\n"
+	"  -r, --solver-report             Print solver report.\n"
 	"  -p, --pipelined         <bool>  Use evanix build pipeline.\n"
 	"  -c, --close-unused-fd   <bool>  Close stderr on exec.\n"
 	"\n";
@@ -27,6 +28,7 @@ struct evanix_opts_t evanix_opts = {
 	.isdryrun = false,
 	.max_build = 0,
 	.system = NULL,
+	.solver_report = false,
 };
 
 static int evanix(char *expr);
@@ -104,6 +106,7 @@ int main(int argc, char *argv[])
 		{"flake", no_argument, NULL, 'f'},
 		{"dry-run", no_argument, NULL, 'd'},
 		{"system", required_argument, NULL, 's'},
+		{"solver-report", no_argument, NULL, 'r'},
 		{"max-build", required_argument, NULL, 'm'},
 		{"pipelined", required_argument, NULL, 'p'},
 		{"close-stderr-exec", required_argument, NULL, 'c'},
@@ -126,6 +129,9 @@ int main(int argc, char *argv[])
 		case 's':
 			evanix_opts.system = optarg;
 			break;
+		case 'r':
+			evanix_opts.solver_report = true;
+			break;
 		case 'm':
 			ret = atoi(optarg);
 			if (ret <= 0) {
diff --git a/src/jobs.c b/src/jobs.c
index 00d667f..67df86f 100644
--- a/src/jobs.c
+++ b/src/jobs.c
@@ -429,6 +429,7 @@ static int job_new(struct job **j, char *name, char *drv_path, char *attr,
 	job->scheduled = false;
 	/* unset by job_read_cache() */
 	job->stale = true;
+	job->reported = false;
 	job->id = -1;
 
 	job->outputs_size = 0;
diff --git a/src/queue.c b/src/queue.c
index 4592045..049d62c 100644
--- a/src/queue.c
+++ b/src/queue.c
@@ -65,30 +65,6 @@ int queue_isempty(struct job_clist *jobs)
 	return true;
 }
 
-/* remove a node along with all it's ancestors recursively */
-int queue_ancestors_rm(struct job *job, struct job_clist *jobs,
-		       struct htab *htab)
-{
-	struct job *j;
-	int ret;
-
-	job_stale_set(job);
-	CIRCLEQ_FOREACH (j, jobs, clist) {
-		if (j->stale == false)
-			continue;
-
-		ret = queue_dag_isolate(j, NULL, jobs, htab);
-		if (ret < 0)
-			return ret;
-
-		job_free(j);
-		/* we might have removed j->clist.cqe_next */
-		j = jobs->cqh_last;
-	}
-
-	return 0;
-}
-
 void *queue_thread_entry(void *queue_thread)
 {
 	struct queue_thread *qt = queue_thread;
diff --git a/src/solver_greedy.c b/src/solver_greedy.c
index d3dbb8f..0140df1 100644
--- a/src/solver_greedy.c
+++ b/src/solver_greedy.c
@@ -1,6 +1,7 @@
 #include <errno.h>
 #include <queue.h>
 
+#include "evanix.h"
 #include "jobs.h"
 #include "queue.h"
 #include "solver_greedy.h"
@@ -40,6 +41,21 @@ static int32_t builds_isolated(struct job *job)
 	return job->deps_filled + 1;
 }
 
+static void solver_report(struct job *job, int32_t max_build)
+{
+	if (!evanix_opts.solver_report)
+		return;
+	else if (job->reported)
+		return;
+
+	job->reported = true;
+	printf("❌ cost: %2d > %2d <-> %s -> %s\n", builds_isolated(job),
+	       max_build, job->name, job->drv_path);
+
+	for (size_t i = 0; i < job->parents_filled; i++)
+		solver_report(job->parents[i], max_build);
+}
+
 int solver_greedy(struct job_clist *q, int32_t *max_build, struct job **job)
 {
 	struct job *j;
@@ -53,6 +69,7 @@ int solver_greedy(struct job_clist *q, int32_t *max_build, struct job **job)
 			continue;
 		} else if (builds_isolated(j) > *max_build) {
 			job_stale_set(j);
+			solver_report(j, *max_build);
 			continue;
 		}
 	}
@@ -69,11 +86,21 @@ int solver_greedy(struct job_clist *q, int32_t *max_build, struct job **job)
 			   selected->deps_filled > j->deps_filled) {
 			selected = j;
 		}
+
+		if (!evanix_opts.solver_report)
+			continue;
+		printf("ℹ️ cost: %2d, conformity: %.2f <-> %s -> %s\n",
+		       builds_isolated(j), conformity_cur, j->name,
+		       j->drv_path);
 	}
 
 	if (selected == NULL)
 		return -ESRCH;
 
+	if (evanix_opts.solver_report)
+		printf("✅ cost: %2d, conformity: %.2f <-> %s -> %s\n",
+		       builds_isolated(selected), conformity_max,
+		       selected->name, selected->drv_path);
 	*max_build -= builds_isolated(selected);
 	*job = selected;
 	return 0;
-- 
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