lynxis lazus has uploaded this change for review.

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RFC: add support to create a shallow copy

Change-Id: I0f1ac8852218f158ece14c176f05574f60d9d1f7
---
A _testenv/data/scripts/create_shallow.sh
M _testenv/testenv/osmo_dev.py
2 files changed, 74 insertions(+), 3 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/34/39234/1

diff --git a/_testenv/data/scripts/create_shallow.sh b/_testenv/data/scripts/create_shallow.sh
new file mode 100755
index 0000000..f74e0c1
--- /dev/null
+++ b/_testenv/data/scripts/create_shallow.sh
@@ -0,0 +1,54 @@
+#!/bin/bash
+#
+# Copyright 2025 Alexander Couzens <lynxis@fe80.eu>
+# Under GPLv2
+#
+# Create a shallow copy of all git repos if they match a pattern
+
+set -e
+
+SRC_DIR=$1
+SHALLOW_DIR=$2
+REPOS=""
+
+if [ $# -ne 2 ]; then
+	echo "Not enough argument given"
+	exit 1
+fi
+
+if [ ! -d "$SRC_DIR" ]; then
+	echo "Error: SRC_DIR $SRC_DIR doesn't exist"
+fi
+
+cd "$SRC_DIR"
+for i in *osmo* ; do
+	echo "Checking $i for .git"
+	if [ -d "$i/.git" ]; then
+		REPOS="$REPOS $i"
+	fi
+done
+
+ADDITIONALS="libasn1c libsmpp34"
+for i in $ADDITIONALS ; do
+	echo "Checking $i for .git"
+	if [ -d "$i/.git" ]; then
+		REPOS="$REPOS $i"
+	fi
+done
+
+mkdir -p "$SHALLOW_DIR"
+cd "$SHALLOW_DIR"
+echo "All repos are $REPOS"
+for repo in $REPOS; do
+	echo "checking out $repo"
+	if [ ! -d "$repo" ]; then
+		mkdir "$repo"
+		ln -s "${SRC_DIR}/$repo/.git" "$repo/.git"
+	fi
+
+	cd "$repo"
+	git checkout -- .
+	cd ..
+done
+
+echo "All git repos cloned"
diff --git a/_testenv/testenv/osmo_dev.py b/_testenv/testenv/osmo_dev.py
index 51d07a7..f6ae3ee 100644
--- a/_testenv/testenv/osmo_dev.py
+++ b/_testenv/testenv/osmo_dev.py
@@ -52,7 +52,11 @@
     sys.exit(1)
 
 
-def init():
+def init(shallow=False):
+    """ Initialize the podman container by compiling projects
+
+        :param shallow: create a shallow git copy by checkout out the last git commit into a seperate directory
+    """
     global init_done
     global make_dir
 
@@ -73,6 +77,20 @@
             os.path.join(testenv.args.cache, "host/usr"),
         ]
 
+    cwd = get_osmo_dev_dir()
+    # switch paths and do a mkdir $foo ; cd $foo; ln -s $src_dir/$foo $foo/.git ; cd ..
+    src_dir = testenv.src_dir
+    if shallow:
+        tmp_dir = '/tmp/shallow'
+        os.makedirs(tmp_dir, exist_ok=True)
+        cmd = [os.path.join(testenv.data_dir, "scripts/create_shallow.sh"), src_dir, tmp_dir]
+        returncode = testenv.cmd.run(cmd, cwd=cwd, check=False).returncode
+        if returncode:
+            raise RuntimeError(f"Return code {returncode}. Ran {cmd}.")
+        logging.warning("created a shallow copy")
+
+        src_dir = '/tmp/shallow'
+
     cmd = [
         "./gen_makefile.py",
         "--build-debug",
@@ -81,7 +99,7 @@
         make_dir,
         "--no-ldconfig",
         "--src-dir",
-        testenv.src_dir,
+        src_dir,
         "default.opts",
         "ccache.opts",
         "gtp_linux.opts",
@@ -96,7 +114,6 @@
         os.path.join(testenv.data_dir, "osmo-dev/osmo-bts-trx.opts"),
     ] + extra_opts
 
-    cwd = get_osmo_dev_dir()
     if testenv.cmd.run(cmd, cwd=cwd, check=False).returncode:
         logging.critical("gen_makefile.py from osmo-dev failed!")
         logging.critical("Your osmo-dev.git clone might be outdated, try:")

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