From e9d284c36dcdef11d2360537a8c0b7acf2b4f4cc Mon Sep 17 00:00:00 2001
From: Soban Javed <iamsobanjaved@gmail.com>
Date: Tue, 7 Sep 2021 16:12:09 +0500
Subject: [PATCH] feat: add script to resolve common constraint

This script will be used be each repo during make upgrade, if wants to override global constraints locally.
---
 edx_lint/files/resolve-common-constraints.sh | 49 ++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 edx_lint/files/resolve-common-constraints.sh

diff --git a/edx_lint/files/resolve-common-constraints.sh b/edx_lint/files/resolve-common-constraints.sh
new file mode 100644
index 00000000..b4f2fd48
--- /dev/null
+++ b/edx_lint/files/resolve-common-constraints.sh
@@ -0,0 +1,49 @@
+# Fetching latest copy of common constraints from edx-lint repo
+wget -O "requirements/common_constraints.txt" https://raw.githubusercontent.com/edx/edx-lint/master/edx_lint/files/common_constraints.txt || touch "requirements/common_constraints.txt"
+
+common_constraints=()
+local_constraints=()
+updated_common_constraints=()
+
+while IFS= read -r line; do
+    if [ -n "$line" ] && [ "${line:0:1}" != "#" ];
+    then
+        # Read common constraints from common constraints file
+        common_constraints+=("$line")
+    fi
+done < requirements/common_constraints.txt
+
+while IFS= read -r line; do
+    if [ -n "$line" ] && [ "${line:0:1}" != "#" ] && [ "${line:0:1}" != "-" ];
+    then
+        # Read local constraints from constraints file for comparison
+        local_constraints+=("$line")
+    fi
+done < requirements/constraints.txt
+
+
+for common in "${common_constraints[@]}"
+do
+    # Extract package name from constraint
+    common_package=$(echo "$common" | sed 's/\([a-zA-Z0-9-]*\).*/\1/')
+    found=false
+    for local in "${local_constraints[@]}"
+    do
+        # Extract package name from constraint
+        local_package=$(echo "$local" | sed 's/\([a-zA-Z0-9-]*\).*/\1/')
+        if [ "$common_package" = "$local_package" ];
+        then
+            # Update the flag if local pin is found on same package
+            found=true
+            break
+        fi
+    done
+    if [ "$found" = false ];
+    then
+        updated_common_constraints+=("$common")
+    fi
+done
+
+# Adding filtered common constraints into a file before running pip-compile and add reference of this file in constraints file.
+printf "%s\n" "${updated_common_constraints[@]}" > requirements/common_constraints.txt
+echo "-c common_constraints.txt" >> requirements/constraints.txt