From ebbf45d1234f16464897d1453cd51ed105a7557c Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:25:51 +0100
Subject: [PATCH 01/17] non compliant commit for PR.

---
 src/mylib.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/mylib.c b/src/mylib.c
index cd01d47..7ed2369 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -5,7 +5,8 @@
 
 static _Thread_local char buf[BUF_SIZE];
 
-const char* greet(const char* name) {
+const char* greet(         const char* name) {
     snprintf(buf, BUF_SIZE, "Hello, %s!", name);
-    return buf;
+    return buf
+	    ;
 }

From e6046c5357a92a9ff54a1289e82db6fe5af68eca Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:36:56 +0100
Subject: [PATCH 02/17] update pre-commit action so that it auto-commits in PRs

---
 .github/workflows/pre-commit.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 201d3aa..c60b5ee 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -53,7 +53,7 @@ jobs:
                          --files
 
       - name: Commit if changes
-        if: github.event_name == 'pull_request'
+        if: always() && github.event_name == 'pull_request' # always() bypasses the error code from pre-commit.
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"

From fc31c6a44522c3b4841d74e40cccee371381e92d Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:40:39 +0100
Subject: [PATCH 03/17] another try

---
 .github/workflows/pre-commit.yaml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index c60b5ee..7e35372 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -19,8 +19,9 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
 
       - name: Set up Python
         id: setup-python

From df3d5978fcf1cf7d4ed503886eb63302e65b9619 Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:41:48 +0100
Subject: [PATCH 04/17] another try with permissions this time

---
 .github/workflows/pre-commit.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 7e35372..587af73 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -18,6 +18,9 @@ on:
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
     steps:
       - uses: actions/checkout@v4
         with:

From 0ee7efd1faebc6bbb4cda1e5dce9de785b311cbd Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 16 Mar 2026 20:42:11 +0000
Subject: [PATCH 05/17] chore: auto-format code [skip ci]

---
 src/main.c  | 3 +--
 src/mylib.c | 5 ++---
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/main.c b/src/main.c
index 77bf4a6..f2399e7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -2,8 +2,7 @@
 #include "mylib.h"
 
 int main(void) {
-    int x =   3
-	    ;
+    int x = 3;
     printf("%s\n", greet("World"));
     return 0;
 }
diff --git a/src/mylib.c b/src/mylib.c
index 7ed2369..cd01d47 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -5,8 +5,7 @@
 
 static _Thread_local char buf[BUF_SIZE];
 
-const char* greet(         const char* name) {
+const char* greet(const char* name) {
     snprintf(buf, BUF_SIZE, "Hello, %s!", name);
-    return buf
-	    ;
+    return buf;
 }

From f5706623e3165194dcb118f32fc2b687134187fb Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:50:17 +0100
Subject: [PATCH 06/17] Fix action + noncompliant C

---
 .github/workflows/pre-commit.yaml | 12 ++++++++++--
 README.md                         |  1 +
 src/main.c                        |  3 ++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 587af73..a4e2c0a 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -15,6 +15,10 @@ on:
         required: false
         default: '.'
 
+concurrency:
+  group: pre-commit-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
@@ -57,12 +61,16 @@ jobs:
                          --files
 
       - name: Commit if changes
-        if: always() && github.event_name == 'pull_request' # always() bypasses the error code from pre-commit.
+        # always() bypasses the error code from pre-commit.
+        # don't run again if this review has been triggered by github-actions[bot],
+        #   since this would create an action loop.
+        if: always() && github.event_name == 'pull_request' && github.actor != 'github-actions[bot]'
+        # Normally github message would include [skip ci] to prevent loops, but since this is the pre-commit fixer, it should be stable.
         run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add -A
           if ! git diff --cached --quiet; then
-            git commit -m "chore: auto-format code [skip ci]"
+            git commit -m "chore: auto-format code"
             git push
           fi
diff --git a/README.md b/README.md
index 81ebdcf..b0b992f 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 # test_github_workflows
+
 Test github workflows
diff --git a/src/main.c b/src/main.c
index f2399e7..65e6b00 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,6 +3,7 @@
 
 int main(void) {
     int x = 3;
-    printf("%s\n", greet("World"));
+    printf("%s\n",
+         greet("World"));
     return 0;
 }

From 72e0f456ec1e470b8e4ca661110a413d9d8abcf9 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 16 Mar 2026 20:50:39 +0000
Subject: [PATCH 07/17] chore: auto-format code

---
 src/main.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/main.c b/src/main.c
index 65e6b00..f2399e7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,7 +3,6 @@
 
 int main(void) {
     int x = 3;
-    printf("%s\n",
-         greet("World"));
+    printf("%s\n", greet("World"));
     return 0;
 }

From c83cb84a491ab530fdf65a54cac49bb6e612ff8d Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:56:33 +0100
Subject: [PATCH 08/17] more testing

---
 .github/workflows/pre-commit.yaml | 16 ++++++++++------
 src/mylib.c                       |  3 ++-
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index a4e2c0a..df3ef26 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -15,10 +15,6 @@ on:
         required: false
         default: '.'
 
-concurrency:
-  group: pre-commit-${{ github.event.pull_request.number || github.ref }}
-  cancel-in-progress: true
-
 jobs:
   pre-commit:
     runs-on: ubuntu-latest
@@ -28,7 +24,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.head_ref || github.ref_name }}
 
       - name: Set up Python
         id: setup-python
@@ -71,6 +67,14 @@ jobs:
           git config user.email "github-actions[bot]@users.noreply.github.com"
           git add -A
           if ! git diff --cached --quiet; then
-            git commit -m "chore: auto-format code"
+            git commit -m "chore: auto-format code [skip ci]"
             git push
           fi
+
+      - name: Re-run pre-commit hooks
+        working-directory: ${{ inputs.working-directory }}
+        run: |
+          git ls-files | xargs pre-commit run \
+                         --show-diff-on-failure \
+                         --color=always \
+                         --files
diff --git a/src/mylib.c b/src/mylib.c
index cd01d47..b862f07 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -6,6 +6,7 @@
 static _Thread_local char buf[BUF_SIZE];
 
 const char* greet(const char* name) {
-    snprintf(buf, BUF_SIZE, "Hello, %s!", name);
+    snprintf(buf, 
+        BUF_SIZE, "Hello, %s!", name);
     return buf;
 }

From 12fcf0d5db1b4ca5ac0b538599b3a531b5b7a6f9 Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 16 Mar 2026 20:56:52 +0000
Subject: [PATCH 09/17] chore: auto-format code [skip ci]

---
 src/mylib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/mylib.c b/src/mylib.c
index b862f07..cd01d47 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -6,7 +6,6 @@
 static _Thread_local char buf[BUF_SIZE];
 
 const char* greet(const char* name) {
-    snprintf(buf, 
-        BUF_SIZE, "Hello, %s!", name);
+    snprintf(buf, BUF_SIZE, "Hello, %s!", name);
     return buf;
 }

From 4436ea4526ed07383ad07b96aa08c2f18950b594 Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 21:59:54 +0100
Subject: [PATCH 10/17] x

---
 .github/workflows/pre-commit.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index df3ef26..cc5d332 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -49,6 +49,7 @@ jobs:
           pre-commit install
 
       - name: Run pre-commit hooks
+        continue-on-error: true
         working-directory: ${{ inputs.working-directory }}
         run: |
           git ls-files | xargs pre-commit run \
@@ -60,7 +61,7 @@ jobs:
         # always() bypasses the error code from pre-commit.
         # don't run again if this review has been triggered by github-actions[bot],
         #   since this would create an action loop.
-        if: always() && github.event_name == 'pull_request' && github.actor != 'github-actions[bot]'
+        if: github.event_name == 'pull_request' && github.actor != 'github-actions[bot]'
         # Normally github message would include [skip ci] to prevent loops, but since this is the pre-commit fixer, it should be stable.
         run: |
           git config user.name "github-actions[bot]"

From fe424957bb97cacac6df34a541f92f43136e6f69 Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:01:38 +0100
Subject: [PATCH 11/17] bad commit

---
 src/mylib.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/mylib.c b/src/mylib.c
index cd01d47..9b9dd0c 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -6,6 +6,7 @@
 static _Thread_local char buf[BUF_SIZE];
 
 const char* greet(const char* name) {
-    snprintf(buf, BUF_SIZE, "Hello, %s!", name);
+    snprintf(buf, BUF_SIZE,
+        "Hello, %s!", name);
     return buf;
 }

From 01b98baac026ec6f0c1bbb297983da1e037184bf Mon Sep 17 00:00:00 2001
From: "github-actions[bot]" <github-actions[bot]@users.noreply.github.com>
Date: Mon, 16 Mar 2026 21:02:03 +0000
Subject: [PATCH 12/17] chore: auto-format code [skip ci]

---
 src/mylib.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/mylib.c b/src/mylib.c
index 9b9dd0c..cd01d47 100644
--- a/src/mylib.c
+++ b/src/mylib.c
@@ -6,7 +6,6 @@
 static _Thread_local char buf[BUF_SIZE];
 
 const char* greet(const char* name) {
-    snprintf(buf, BUF_SIZE,
-        "Hello, %s!", name);
+    snprintf(buf, BUF_SIZE, "Hello, %s!", name);
     return buf;
 }

From a519e94f6701a5932ba609fbab54dbc4ff1a052b Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:12:32 +0100
Subject: [PATCH 13/17] more

---
 .github/workflows/pre-commit.yaml | 36 ++++++++++++++++++++++++-------
 src/main.c                        |  3 ++-
 2 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index cc5d332..349e18d 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -52,10 +52,20 @@ jobs:
         continue-on-error: true
         working-directory: ${{ inputs.working-directory }}
         run: |
-          git ls-files | xargs pre-commit run \
-                         --show-diff-on-failure \
-                         --color=always \
-                         --files
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            git fetch --no-tags --depth=1 origin "${{ github.base_ref }}"
+            pre-commit run \
+              --from-ref "${{ github.base_ref }}" \
+              --to-ref "HEAD" \
+              --show-diff-on-failure \
+              --color=always
+          else
+            pre-commit run \
+              --from-ref "HEAD~1" \
+              --to-ref "HEAD" \
+              --show-diff-on-failure \
+              --color=always
+          fi
 
       - name: Commit if changes
         # always() bypasses the error code from pre-commit.
@@ -75,7 +85,17 @@ jobs:
       - name: Re-run pre-commit hooks
         working-directory: ${{ inputs.working-directory }}
         run: |
-          git ls-files | xargs pre-commit run \
-                         --show-diff-on-failure \
-                         --color=always \
-                         --files
+          if [ "${{ github.event_name }}" = "pull_request" ]; then
+            git fetch --no-tags --depth=1 origin "${{ github.base_ref }}"
+            pre-commit run \
+              --from-ref "${{ github.base_ref }}" \
+              --to-ref "HEAD" \
+              --show-diff-on-failure \
+              --color=always
+          else
+            pre-commit run \
+              --from-ref "HEAD~1" \
+              --to-ref "HEAD" \
+              --show-diff-on-failure \
+              --color=always
+          fi
diff --git a/src/main.c b/src/main.c
index f2399e7..4ffd537 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,6 +3,7 @@
 
 int main(void) {
     int x = 3;
-    printf("%s\n", greet("World"));
+    printf("%s\n", greet("
+        World"));
     return 0;
 }

From fd0c009d4900f0fe59865ff0b11efdb36c8046f2 Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:13:31 +0100
Subject: [PATCH 14/17] bad commit

---
 src/main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.c b/src/main.c
index 4ffd537..1295166 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,7 +3,7 @@
 
 int main(void) {
     int x = 3;
-    printf("%s\n", greet("
-        World"));
+    printf("%s\n",
+        greet("World"));
     return 0;
 }

From 2ae60e5fa9ebc3ccab911cf83474dc16f16fcb4b Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:17:58 +0100
Subject: [PATCH 15/17] yolo

---
 .github/workflows/pre-commit.yaml | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index 349e18d..e8a32ad 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -53,9 +53,8 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
         run: |
           if [ "${{ github.event_name }}" = "pull_request" ]; then
-            git fetch --no-tags --depth=1 origin "${{ github.base_ref }}"
             pre-commit run \
-              --from-ref "${{ github.base_ref }}" \
+              --from-ref "${{ github.event.pull_request.base.sha }}" \
               --to-ref "HEAD" \
               --show-diff-on-failure \
               --color=always
@@ -86,9 +85,8 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
         run: |
           if [ "${{ github.event_name }}" = "pull_request" ]; then
-            git fetch --no-tags --depth=1 origin "${{ github.base_ref }}"
             pre-commit run \
-              --from-ref "${{ github.base_ref }}" \
+              --from-ref "${{ github.event.pull_request.base.sha }}" \
               --to-ref "HEAD" \
               --show-diff-on-failure \
               --color=always

From 5f5fcadba7c9599d9c490decb4e971c97d27e52f Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:20:09 +0100
Subject: [PATCH 16/17] yolo

---
 .github/workflows/pre-commit.yaml | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index e8a32ad..a8f2dc4 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -52,9 +52,11 @@ jobs:
         continue-on-error: true
         working-directory: ${{ inputs.working-directory }}
         run: |
+          git fetch --no-tags --depth=1 origin \
+          "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             pre-commit run \
-              --from-ref "${{ github.event.pull_request.base.sha }}" \
+              --from-ref "${{ github.base_ref }}" \
               --to-ref "HEAD" \
               --show-diff-on-failure \
               --color=always
@@ -84,12 +86,11 @@ jobs:
       - name: Re-run pre-commit hooks
         working-directory: ${{ inputs.working-directory }}
         run: |
+          git fetch --no-tags --depth=1 origin \
+          "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             pre-commit run \
-              --from-ref "${{ github.event.pull_request.base.sha }}" \
-              --to-ref "HEAD" \
-              --show-diff-on-failure \
-              --color=always
+              --from-ref "${{ github.base_ref }}" \
           else
             pre-commit run \
               --from-ref "HEAD~1" \

From 2aad59213ceaa1f10b866fd1430aa6d0acd091b6 Mon Sep 17 00:00:00 2001
From: vdeo <vdeo@naoj.org>
Date: Mon, 16 Mar 2026 22:23:35 +0100
Subject: [PATCH 17/17] yolo

---
 .github/workflows/pre-commit.yaml | 13 +++++++------
 src/main.c                        |  3 +--
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index a8f2dc4..5602edc 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -52,11 +52,10 @@ jobs:
         continue-on-error: true
         working-directory: ${{ inputs.working-directory }}
         run: |
-          git fetch --no-tags --depth=1 origin \
-          "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
+          git fetch --no-tags --depth=1 origin "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             pre-commit run \
-              --from-ref "${{ github.base_ref }}" \
+              --from-ref "origin/${{ github.base_ref }}" \
               --to-ref "HEAD" \
               --show-diff-on-failure \
               --color=always
@@ -86,11 +85,13 @@ jobs:
       - name: Re-run pre-commit hooks
         working-directory: ${{ inputs.working-directory }}
         run: |
-          git fetch --no-tags --depth=1 origin \
-          "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
+          git fetch --no-tags --depth=1 origin "${{ github.base_ref }}:refs/remotes/origin/${{ github.base_ref }}"
           if [ "${{ github.event_name }}" = "pull_request" ]; then
             pre-commit run \
-              --from-ref "${{ github.base_ref }}" \
+              --from-ref "origin/${{ github.base_ref }}" \
+              --to-ref "HEAD" \
+              --show-diff-on-failure \
+              --color=always
           else
             pre-commit run \
               --from-ref "HEAD~1" \
diff --git a/src/main.c b/src/main.c
index 1295166..f2399e7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -3,7 +3,6 @@
 
 int main(void) {
     int x = 3;
-    printf("%s\n",
-        greet("World"));
+    printf("%s\n", greet("World"));
     return 0;
 }