Change references to "master" to be to "main"

.github/workflows/ci.yaml

@@ -29,7 +29,7 @@ on:
   pull_request:
     types: [opened, synchronize]
     branches:
-      - master
+      - main
 
   merge_group:
     types:

.github/workflows/osv-scanner.yaml

@@ -38,7 +38,6 @@ on:
     types: [opened, synchronize]
     branches:
       - main
-      - master
 
   # Support merge queues.
   merge_group:

.github/workflows/scorecard-scanner.yaml

@@ -29,7 +29,6 @@ on:
     types: [opened, synchronize]
     branches:
       - main
-      - master
 
   # Support merge queues.
   merge_group:

README.rst

@@ -1,4 +1,4 @@
-.. image:: https://raw.githubusercontent.com/quantumlib/OpenFermion/refs/heads/master/docs/images/logo_horizontal.svg
+.. image:: https://raw.githubusercontent.com/quantumlib/OpenFermion/refs/heads/main/docs/images/logo_horizontal.svg
    :alt: OpenFermion logo
    :width: 75%
    :align: center
@@ -42,7 +42,7 @@ You can run the interactive Jupyter Notebooks in |Colab|_ or |MyBinder|_.
 .. _Colab: https://colab.research.google.com/github/quantumlib/OpenFermion
 
 .. |MyBinder| replace:: MyBinder
-.. _MyBinder:  https://mybinder.org/v2/gh/quantumlib/OpenFermion/master?filepath=examples
+.. _MyBinder:  https://mybinder.org/v2/gh/quantumlib/OpenFermion/main?filepath=examples
 
 Installation and Documentation
 ==============================
@@ -64,7 +64,7 @@ the electronic structure plugins are only compatible on these platforms. However
 for those who would like to use Windows, or for anyone having other difficulties
 with installing OpenFermion or its plugins, we provide a Docker image
 and usage instructions in the
-`docker folder <https://github.com/quantumlib/OpenFermion/tree/master/docker>`__.
+`docker folder <https://github.com/quantumlib/OpenFermion/tree/main/docker>`__.
 The Docker image provides a virtual environment with OpenFermion and select plugins pre-installed.
 The Docker installation should run on any operating system where Docker can be used.
 

check/format-incremental

@@ -31,14 +31,14 @@
 #
 # You can specify a base git revision to compare against (i.e. to use when
 # determining whether or not a file is considered to have "changed"). For
-# example, you can compare against 'origin/master' or 'HEAD~1'.
+# example, you can compare against 'origin/main' or 'HEAD~1'.
 #
 # If you don't specify a base revision, the following defaults will be tried, in
 # order, until one exists:
 #
-#     1. upstream/master
-#     2. origin/master
-#     3. master
+#     1. upstream/main
+#     2. origin/main
+#     3. main
 #
 # If none exists, the script fails.
 ################################################################################
@@ -48,7 +48,6 @@ thisdir="$(dirname "${BASH_SOURCE[0]}")" || exit $?
 topdir="$(git -C "${thisdir}" rev-parse --show-toplevel)" || exit $?
 cd "${topdir}" || exit $?
 
-
 # Parse arguments.
 only_print=1
 only_changed=1
@@ -74,14 +73,14 @@ typeset -a format_files
 if (( only_changed == 1 )); then
     # Figure out which branch to compare against.
     if [ -z "${rev}" ]; then
-        if [ "$(git cat-file -t upstream/master 2> /dev/null)" == "commit" ]; then
-            rev=upstream/master
-        elif [ "$(git cat-file -t origin/master 2> /dev/null)" == "commit" ]; then
-            rev=origin/master
-        elif [ "$(git cat-file -t master 2> /dev/null)" == "commit" ]; then
-            rev=master
+        if [ "$(git cat-file -t upstream/main 2> /dev/null)" == "commit" ]; then
+            rev=upstream/main
+        elif [ "$(git cat-file -t origin/main 2> /dev/null)" == "commit" ]; then
+            rev=origin/main
+        elif [ "$(git cat-file -t main 2> /dev/null)" == "commit" ]; then
+            rev=main
         else
-            echo -e "\033[31mNo default revision found to compare against. Argument #1 must be what to diff against (e.g. 'origin/master' or 'HEAD~1').\033[0m" >&2
+            echo -e "\033[31mNo default revision found to compare against. Argument #1 must be what to diff against (e.g. 'origin/main' or 'HEAD~1').\033[0m" >&2
             exit 1
         fi
     fi

check/pylint-changed-files

@@ -28,9 +28,9 @@
 # If you don't specify a base revision, the following defaults will be tried,
 # in order, until one exists:
 #
-#     1. upstream/main or upstream/master
-#     2. origin/main or origin/master
-#     3. main or master
+#     1. upstream/main
+#     2. origin/main
+#     3. main
 #
 # If none exists, the script will exit with an error.
 #
@@ -43,22 +43,19 @@ thisdir=$(dirname "${BASH_SOURCE[0]:?}") || exit $?
 repo_dir=$(git -C "${thisdir}" rev-parse --show-toplevel) || exit $?
 cd "${repo_dir}" || exit $?
 
-# Some old repos used "master" instead of main. Find out which one we have here.
-default=$(git branch --format '%(refname:short)' --list master main)
-
 # Figure out which revision to compare against.
 if [ -n "$1" ] && [[ $1 != -* ]]; then
     if ! git rev-parse --verify --quiet --no-revs "$1^{commit}"; then
         echo -e "\033[31mNo revision '$1'.\033[0m" >&2
         exit 1
     fi
     rev=$1
-elif [ "$(git cat-file -t "upstream/${default}" 2> /dev/null)" == "commit" ]; then
-    rev=upstream/${default}
-elif [ "$(git cat-file -t "origin/${default}" 2> /dev/null)" == "commit" ]; then
-    rev=origin/${default}
-elif [ "$(git cat-file -t "${default}" 2> /dev/null)" == "commit" ]; then
-    rev=${default}
+elif [ "$(git cat-file -t "upstream/main" 2> /dev/null)" == "commit" ]; then
+    rev=upstream/main
+elif [ "$(git cat-file -t "origin/main" 2> /dev/null)" == "commit" ]; then
+    rev=origin/main
+elif [ "$(git cat-file -t "main" 2> /dev/null)" == "commit" ]; then
+    rev=main
 else
     echo -e "\033[31mNo default revision found to compare against. Argument #1 must be what to diff against (e.g. 'origin/main' or 'HEAD~1').\033[0m" >&2
     exit 1

check/pytest-and-incremental-coverage

@@ -22,15 +22,15 @@
 # You can specify a base git revision to compare against (i.e. to use when
 # determining whether or not a line is considered to have "changed"). To make
 # the tool more consistent, it actually diffs against the most recent common
-# ancestor of the specified id and HEAD. So if you choose 'origin/master' you're
-# actually diffing against the output of 'git merge-base origin/master HEAD'.
+# ancestor of the specified id and HEAD. So if you choose 'origin/main' you're
+# actually diffing against the output of 'git merge-base origin/main HEAD'.
 #
 # If you don't specify a base revision, the following defaults will be tried,
 # in order, until one exists:
 #
-#     1. upstream/master
-#     2. origin/master
-#     3. master
+#     1. upstream/main
+#     2. origin/main
+#     3. main
 #
 # If none exists, the script fails.
 ################################################################################
@@ -46,14 +46,14 @@ if [[ -n "$1" && $1 != -* ]]; then
         exit 1
     fi
     rev=$1
-elif [ "$(git cat-file -t upstream/master 2> /dev/null)" == "commit" ]; then
-    rev=upstream/master
-elif [ "$(git cat-file -t origin/master 2> /dev/null)" == "commit" ]; then
-    rev=origin/master
-elif [ "$(git cat-file -t master 2> /dev/null)" == "commit" ]; then
-    rev=master
+elif [ "$(git cat-file -t upstream/main 2> /dev/null)" == "commit" ]; then
+    rev=upstream/main
+elif [ "$(git cat-file -t origin/main 2> /dev/null)" == "commit" ]; then
+    rev=origin/main
+elif [ "$(git cat-file -t main 2> /dev/null)" == "commit" ]; then
+    rev=main
 else
-    echo -e "\033[31mNo default revision found to compare against. Argument #1 must be what to diff against (e.g. 'origin/master' or 'HEAD~1').\033[0m" >&2
+    echo -e "\033[31mNo default revision found to compare against. Argument #1 must be what to diff against (e.g. 'origin/main' or 'HEAD~1').\033[0m" >&2
     exit 1
 fi
 # shellcheck disable=SC2086

dev_tools/check_incremental_coverage_annotations.py

@@ -26,7 +26,7 @@ def main():
     if len(sys.argv) < 2:
         print(
             shell_tools.highlight(
-                'Must specify a comparison branch (e.g. "origin/master" or "HEAD~1").',
+                'Must specify a comparison branch (e.g. "origin/main" or "HEAD~1").',
                 shell_tools.RED,
             )
         )

dev_tools/docs/build_api_docs.py

@@ -24,18 +24,19 @@
 
 import openfermion
 
-flags.DEFINE_string("output_dir", "/tmp/openfermion_api",
-                    "Where to output the docs")
+flags.DEFINE_string("output_dir", "/tmp/openfermion_api", "Where to output the docs")
 
-flags.DEFINE_string("code_url_prefix",
-                    ("https://github.com/quantumlib/OpenFermion/tree/master/src"
-                     "openfermion"), "The url prefix for links to code.")
+flags.DEFINE_string(
+    "code_url_prefix",
+    ("https://github.com/quantumlib/OpenFermion/tree/main/src" "openfermion"),
+    "The url prefix for links to code.",
+)
 
-flags.DEFINE_bool("search_hints", True,
-                  "Include metadata search hints in the generated files")
+flags.DEFINE_bool("search_hints", True, "Include metadata search hints in the generated files")
 
-flags.DEFINE_string("site_path", "quark/openfermion/api_docs/python",
-                    "Path prefix in the _toc.yaml")
+flags.DEFINE_string(
+    "site_path", "quark/openfermion/api_docs/python", "Path prefix in the _toc.yaml"
+)
 
 FLAGS = flags.FLAGS
 
@@ -55,7 +56,8 @@ def main(unused_argv):
             # Example:
             # "cirq.google.engine.client.quantum.QuantumEngineServiceClient":
             # ["enums"]
-        })
+        },
+    )
 
     doc_generator.build(output_dir=FLAGS.output_dir)