From 0ecd73d0f8e02ccaba6a3af75b04aa15fd6150a9 Mon Sep 17 00:00:00 2001
From: Phoebe Nichols <pnichols@fb.com>
Date: Mon, 15 Jul 2019 06:16:03 -0700
Subject: [PATCH] Add --incremental-analysis flag

Summary:
Add a flag to enable incremental diff analysis, where old summaries are not recomputed unless necessary

The implementation for this flag will follow

Reviewed By: ngorogiannis

Differential Revision: D16222865

fbshipit-source-id: e7e225a87
---
 infer/man/man1/infer-full.txt | 4 ++++
 infer/src/base/Config.ml      | 7 +++++++
 infer/src/base/Config.mli     | 3 +++
 3 files changed, 14 insertions(+)

diff --git a/infer/man/man1/infer-full.txt b/infer/man/man1/infer-full.txt
index 32ed38d6c..01cfc284b 100644
--- a/infer/man/man1/infer-full.txt
+++ b/infer/man/man1/infer-full.txt
@@ -1395,6 +1395,10 @@ INTERNAL OPTIONS
        --icfg-dotty-outfile-reset
            Cancel the effect of --icfg-dotty-outfile.
 
+       --incremental-analysis
+           Activates: [EXPERIMENTAL] Use incremental analysis for changed
+           files (Conversely: --no-incremental-analysis)
+
        --iphoneos-target-sdk-version-path-regex-reset
            Set --iphoneos-target-sdk-version-path-regex to the empty list.
 
diff --git a/infer/src/base/Config.ml b/infer/src/base/Config.ml
index e973d1808..a4345f95a 100644
--- a/infer/src/base/Config.ml
+++ b/infer/src/base/Config.ml
@@ -2343,6 +2343,11 @@ and use_cost_threshold =
     "Emit costs issues by comparing costs with a set threshold"
 
 
+and incremental_analysis =
+  CLOpt.mk_bool ~long:"incremental-analysis" ~default:false
+    "[EXPERIMENTAL] Use incremental analysis for changed files"
+
+
 and version =
   let var = ref `None in
   CLOpt.mk_set var `Full ~deprecated:["version"] ~long:"version"
@@ -3176,6 +3181,8 @@ and unsafe_malloc = !unsafe_malloc
 
 and use_cost_threshold = !use_cost_threshold
 
+and incremental_analysis = !incremental_analysis
+
 and worklist_mode = !worklist_mode
 
 and write_dotty = !write_dotty
diff --git a/infer/src/base/Config.mli b/infer/src/base/Config.mli
index 24c3c2dcb..4468ec2f4 100644
--- a/infer/src/base/Config.mli
+++ b/infer/src/base/Config.mli
@@ -195,6 +195,9 @@ val unsafe_unret : string
 
 val use_cost_threshold : bool
 
+(* Suppress unused value warning because the incremental analysis feature is not yet complete *)
+val incremental_analysis : bool [@@warning "-32"]
+
 val weak : string
 
 val whitelisted_cpp_classes : string list