refactored update-version.sh to handle new branching strategy

[rockhowse]

Description

This PR supports handling the new main branch strategy outlined below:

• RSN 47 - Changes to RAPIDS branching strategy in 25.12

The update-version.sh script should now supports two modes controlled via CLI params or ENV vars:

CLI arguments: --run-context=main|release
ENV var RAPIDS_RUN_CONTEXT=main|release

xref: rapidsai/build-planning#224

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[rockhowse]

--run-context=main with version 26.02.00

command

ci/release/update-version.sh --run-context=main 26.02.00
Using run-context from CLI: main
Preparing development branch update 25.12.00a => 26.02.00 (targeting main branch)

2 files changed

❯ git status
On branch ops-4339-update-version-sh-support-main-branching-strategy
Your branch is up to date with 'origin/ops-4339-update-version-sh-support-main-branching-strategy'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   ci/conda-pack.sh
	modified:   ci/test_conda_nightly_env.sh

full diff

❯ git diff | cat
diff --git a/ci/conda-pack.sh b/ci/conda-pack.sh
index b17c9d2..7b7c271 100755
--- a/ci/conda-pack.sh
+++ b/ci/conda-pack.sh
@@ -3,7 +3,7 @@

 set -e

-RAPIDS_VER="25.12"
+RAPIDS_VER="26.02"
 VERSION_DESCRIPTOR="a"
 CONDA_USERNAME="rapidsai-nightly"

diff --git a/ci/test_conda_nightly_env.sh b/ci/test_conda_nightly_env.sh
index bc4a894..fbec59a 100755
--- a/ci/test_conda_nightly_env.sh
+++ b/ci/test_conda_nightly_env.sh
@@ -3,7 +3,7 @@

 set -euo pipefail

-RAPIDS_VERSION="25.12"
+RAPIDS_VERSION="26.02"
 CUDA_VERSION=${RAPIDS_CUDA_VERSION%.*}

 JSON_FILENAME="rapids_cuda${CUDA_VERSION}_py${RAPIDS_PY_VERSION}.json"

[rockhowse]

--run-context=release with version 25.12.00

command

./ci/release/update-version.sh --run-context=release 25.12.00
Using run-context from CLI: release
Preparing release branch update 25.12.00a => 25.12.00 (targeting release/25.12 branch)

4 files changed

❯ git status
On branch ops-4339-update-version-sh-support-main-branching-strategy
Your branch is up to date with 'origin/ops-4339-update-version-sh-support-main-branching-strategy'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   .github/workflows/build.yaml
	modified:   .github/workflows/pr.yaml
	modified:   .github/workflows/test.yaml
	modified:   .github/workflows/trigger-breaking-change-alert.yaml

full diff

❯ git diff | cat
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 974eff4..0fe96e7 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -34,7 +34,7 @@ concurrency:
 jobs:
   build:
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/25.12
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -44,7 +44,7 @@ jobs:
   upload-conda:
     needs: [build]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-upload-packages.yaml@release/25.12
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
@@ -53,7 +53,7 @@ jobs:
   conda-pack:
     needs: [upload-conda]
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/25.12
     with:
       build_type: ${{ inputs.build_type || 'branch' }}
       branch: ${{ inputs.branch }}
diff --git a/.github/workflows/pr.yaml b/.github/workflows/pr.yaml
index e1b862b..756cc6e 100644
--- a/.github/workflows/pr.yaml
+++ b/.github/workflows/pr.yaml
@@ -15,7 +15,7 @@ jobs:
       - build
       - test-conda-nightly-env
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/pr-builder.yaml@release/25.12
   checks:
     runs-on: ubuntu-latest
     steps:
@@ -26,7 +26,7 @@ jobs:
   build:
     needs: checks
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/25.12
     with:
       build_type: pull-request
       script: ci/build_python.sh
@@ -34,7 +34,7 @@ jobs:
     needs: checks
     secrets: inherit
     # We use a build workflow so that we get CPU jobs and high matrix coverage
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/25.12
     with:
       build_type: pull-request
       script: "ci/test_conda_nightly_env.sh"
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 6809777..e15ca7d 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -22,7 +22,7 @@ jobs:
   test-conda-nightly-env:
     secrets: inherit
     # We use a build workflow so that we get CPU jobs and high matrix coverage
-    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/conda-python-build.yaml@release/25.12
     with:
       build_type: pull-request
       script: "ci/test_conda_nightly_env.sh"
diff --git a/.github/workflows/trigger-breaking-change-alert.yaml b/.github/workflows/trigger-breaking-change-alert.yaml
index c471e2a..0b88554 100644
--- a/.github/workflows/trigger-breaking-change-alert.yaml
+++ b/.github/workflows/trigger-breaking-change-alert.yaml
@@ -12,7 +12,7 @@ jobs:
   trigger-notifier:
     if: contains(github.event.pull_request.labels.*.name, 'breaking')
     secrets: inherit
-    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@main
+    uses: rapidsai/shared-workflows/.github/workflows/breaking-change-alert.yaml@release/25.12
     with:
       sender_login: ${{ github.event.sender.login }}
       sender_avatar: ${{ github.event.sender.avatar_url }}

[rockhowse]

/merge