From 8878ff9440841073077508a806a92b96081f5d25 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Wed, 29 Jul 2026 15:47:45 +0200
Subject: [PATCH 01/14] add the parameter

---
 create-and-cache/action.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 27643f6..75db1b7 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -12,6 +12,10 @@ inputs:
     default: |
       pixi.toml
       pyproject.toml
+  manifest-path:
+    description: >-
+      Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`.
+    default: "pixi.toml"
 
 outputs:
   pixi-version:

From 6cc8e72145323fbe6f6afc5223d69a8d4697c733 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Wed, 29 Jul 2026 17:13:27 +0200
Subject: [PATCH 02/14] actually use the manifest path

---
 create-and-cache/action.yml | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 75db1b7..291f643 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -27,6 +27,9 @@ outputs:
 
 runs:
   using: "composite"
+  env:
+    MANIFEST_PATH: ${{ inputs.manifest-path }}
+
   steps:
     - name: Get cache key
       id: cache-key
@@ -39,6 +42,12 @@ runs:
         key="pixi-lock_${PIXI_VERSION}_${HASH_FILES}_${today}"
         echo "key=${key}" >> "$GITHUB_OUTPUT"
 
+    - name: expected pixi lock path
+      id: meta
+      shell: bash
+      run: |
+        echo "lock-path=$(dirname $MANIFEST_PATH)/pixi.lock" >> "$GITHUB_OUTPUT"
+
     - name: Restore pixi.lock from cache
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
       id: restore
@@ -57,12 +66,14 @@ runs:
     - name: Run pixi lock
       if: ${{ !steps.restore.outputs.cache-hit }}
       shell: bash
-      run: pixi lock
+      env:
+        MANIFEST_PATH: ${{ inputs.manifest-path }}
+      run: pixi lock --manifest-path=$MANIFEST_PATH
 
     - name: Save pixi.lock to cache
       uses: actions/cache/save@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
       if: ${{ !steps.restore.outputs.cache-hit }}
       with:
-        path: pixi.lock
+        path: ${{ steps.meta.outputs.lock-path }}
         key: ${{ steps.cache-key.outputs.key }}
         enableCrossOsArchive: true

From 8b09e68b19c793ac209fc8184838db2c78e42892 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 19:56:30 +0200
Subject: [PATCH 03/14] move the env variable into the steps

---
 create-and-cache/action.yml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 291f643..13952ba 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -27,9 +27,6 @@ outputs:
 
 runs:
   using: "composite"
-  env:
-    MANIFEST_PATH: ${{ inputs.manifest-path }}
-
   steps:
     - name: Get cache key
       id: cache-key
@@ -45,6 +42,8 @@ runs:
     - name: expected pixi lock path
       id: meta
       shell: bash
+      env:
+        MANIFEST_PATH: ${{ inputs.manifest-path }}
       run: |
         echo "lock-path=$(dirname $MANIFEST_PATH)/pixi.lock" >> "$GITHUB_OUTPUT"
 

From cbff7beb1bb4535b29b882c8f7596329af9b1d31 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:11:06 +0200
Subject: [PATCH 04/14] pass the manifest to the initial pixi run

---
 create-and-cache/action.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 13952ba..c6fbe74 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -61,6 +61,7 @@ runs:
       with:
         pixi-version: ${{ inputs.pixi-version }}
         run-install: false
+        manifest-path: ${{ inputs.manifest-path }}
 
     - name: Run pixi lock
       if: ${{ !steps.restore.outputs.cache-hit }}

From eaf26adea784bc189af15576239f3dab19142c5f Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:11:26 +0200
Subject: [PATCH 05/14] remove the default

(setup-pixi doesn't have one, either)
---
 create-and-cache/action.yml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index c6fbe74..1472855 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -15,7 +15,6 @@ inputs:
   manifest-path:
     description: >-
       Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`.
-    default: "pixi.toml"
 
 outputs:
   pixi-version:

From 5a2de7972f239040c623ed611301b0e48e7c6307 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:26:00 +0200
Subject: [PATCH 06/14] calculate the lock path from the manifest

---
 restore/action.yml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/restore/action.yml b/restore/action.yml
index f8fe647..d7c739c 100644
--- a/restore/action.yml
+++ b/restore/action.yml
@@ -33,6 +33,18 @@ runs:
         yesterday=$(date -d "${current_date} - 1 day" +'%Y-%m-%d' 2>/dev/null || date -j -f '%Y-%m-%d' -v-1d "${current_date}" +'%Y-%m-%d')
         echo "key=${base}_${yesterday}" >> "$GITHUB_OUTPUT"
 
+    - name: Calculate the lock file path
+      id: lock-path
+      run: |
+        if [[ -z "$MANIFEST_PATH ]]; then
+          lock_path=pixi.lock
+        else
+          base=$(dirname $MANIFEST_PATH)
+          lock_path="$base/pixi.lock"
+        fi
+
+        echo "lock-path=${lock_path}" >> "$GITHUB_OUTPUT"
+
     - name: Restore pixi.lock from cache
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
       id: restore

From 319b93a7b21fdc6ea28223bd7cf85366893b8a41 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:26:10 +0200
Subject: [PATCH 07/14] use the newly calculated lock path

---
 restore/action.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/restore/action.yml b/restore/action.yml
index d7c739c..a16080f 100644
--- a/restore/action.yml
+++ b/restore/action.yml
@@ -49,7 +49,7 @@ runs:
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
       id: restore
       with:
-        path: pixi.lock
+        path: ${{ steps.lock-path.outputs.lock-path }}
         key: ${{ inputs.cache-key }}
         enableCrossOsArchive: true
         restore-keys: |

From 1ae1ad7d68a96caa53f7de7763783fed7e48cd9b Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:30:39 +0200
Subject: [PATCH 08/14] specify a shell

---
 restore/action.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/restore/action.yml b/restore/action.yml
index a16080f..3939738 100644
--- a/restore/action.yml
+++ b/restore/action.yml
@@ -35,6 +35,7 @@ runs:
 
     - name: Calculate the lock file path
       id: lock-path
+      shell: bash
       run: |
         if [[ -z "$MANIFEST_PATH ]]; then
           lock_path=pixi.lock

From fb8dd157072e67db9bf4fb506a1423a39deb1c7c Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Sun, 2 Aug 2026 20:35:01 +0200
Subject: [PATCH 09/14] missing quote

---
 restore/action.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/restore/action.yml b/restore/action.yml
index 3939738..8384e01 100644
--- a/restore/action.yml
+++ b/restore/action.yml
@@ -37,7 +37,7 @@ runs:
       id: lock-path
       shell: bash
       run: |
-        if [[ -z "$MANIFEST_PATH ]]; then
+        if [[ -z "$MANIFEST_PATH" ]]; then
           lock_path=pixi.lock
         else
           base=$(dirname $MANIFEST_PATH)

From 897237b6d0964d8f4d7274185b49648c0e76cebe Mon Sep 17 00:00:00 2001
From: Vecko <36369090+VeckoTheGecko@users.noreply.github.com>
Date: Mon, 3 Aug 2026 09:00:12 +0800
Subject: [PATCH 10/14] Make manifest-path optional

---
 create-and-cache/action.yml | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 1472855..6709f2f 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -13,8 +13,9 @@ inputs:
       pixi.toml
       pyproject.toml
   manifest-path:
+    required: false
     description: >-
-      Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`.
+      Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`, falling back to `pyproject.toml`.
 
 outputs:
   pixi-version:
@@ -38,13 +39,24 @@ runs:
         key="pixi-lock_${PIXI_VERSION}_${HASH_FILES}_${today}"
         echo "key=${key}" >> "$GITHUB_OUTPUT"
 
-    - name: expected pixi lock path
+    - name: Find manifest and lock paths path
       id: meta
       shell: bash
       env:
         MANIFEST_PATH: ${{ inputs.manifest-path }}
       run: |
-        echo "lock-path=$(dirname $MANIFEST_PATH)/pixi.lock" >> "$GITHUB_OUTPUT"
+        if [[ -n "$MANIFEST_PATH" ]]; then
+          manifest_path="$MANIFEST_PATH"
+        elif [[ -f "pixi.toml" ]]; then
+          manifest_path="pixi.toml"
+        elif [[ -f "pyproject.toml" ]]; then
+          manifest_path="pyproject.toml"
+        else
+          echo "Error: no manifest file found (pixi.toml or pyproject.toml)" >&2
+          exit 1
+        fi
+        echo "manifest-path=${manifest_path}" >> "$GITHUB_OUTPUT"
+        echo "lock-path=$(dirname "${manifest_path}")/pixi.lock" >> "$GITHUB_OUTPUT"
 
     - name: Restore pixi.lock from cache
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
@@ -60,13 +72,13 @@ runs:
       with:
         pixi-version: ${{ inputs.pixi-version }}
         run-install: false
-        manifest-path: ${{ inputs.manifest-path }}
+        manifest-path: ${{ steps.meta.outputs.manifest-path }}
 
     - name: Run pixi lock
       if: ${{ !steps.restore.outputs.cache-hit }}
       shell: bash
       env:
-        MANIFEST_PATH: ${{ inputs.manifest-path }}
+        MANIFEST_PATH: ${{ steps.meta.outputs.manifest-path }}
       run: pixi lock --manifest-path=$MANIFEST_PATH
 
     - name: Save pixi.lock to cache

From 9207f0dc0605458304edb7371da5c948f172dcb5 Mon Sep 17 00:00:00 2001
From: Vecko <36369090+VeckoTheGecko@users.noreply.github.com>
Date: Mon, 3 Aug 2026 09:13:51 +0800
Subject: [PATCH 11/14] Add manifest-path to restore/action.yml

---
 restore/action.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/restore/action.yml b/restore/action.yml
index 8384e01..bb4d3e5 100644
--- a/restore/action.yml
+++ b/restore/action.yml
@@ -5,6 +5,10 @@ inputs:
   cache-key:
     description: "The cache key from create-and-cache"
     required: true
+  manifest-path:
+    required: false
+    description: >-
+      Path to the manifest file (i.e., `pixi.toml`) to use for the pixi CLI. Defaults to `pixi.toml`, falling back to `pyproject.toml`.
 
 runs:
   using: "composite"
@@ -36,6 +40,8 @@ runs:
     - name: Calculate the lock file path
       id: lock-path
       shell: bash
+      env:
+        MANIFEST_PATH: ${{ inputs.manifest-path }}
       run: |
         if [[ -z "$MANIFEST_PATH" ]]; then
           lock_path=pixi.lock

From 045d31b58d6a49bb6351daa510cf9d8285adbfa5 Mon Sep 17 00:00:00 2001
From: Vecko <36369090+VeckoTheGecko@users.noreply.github.com>
Date: Mon, 3 Aug 2026 09:15:51 +0800
Subject: [PATCH 12/14] Fix create-and-cache/action.yml

---
 create-and-cache/action.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 6709f2f..027b468 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -62,7 +62,7 @@ runs:
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2
       id: restore
       with:
-        path: pixi.lock
+        path: ${{ steps.meta.outputs.lock-path }}
         key: ${{ steps.cache-key.outputs.key }}
         enableCrossOsArchive: true
 

From 2dce3e24a4ee08b15b5a324520798891b4c1cc8b Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Mon, 3 Aug 2026 23:39:48 +0200
Subject: [PATCH 13/14] only set `lock-path` to a path if manifest-path is set

---
 create-and-cache/action.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/create-and-cache/action.yml b/create-and-cache/action.yml
index 027b468..f7a01a2 100644
--- a/create-and-cache/action.yml
+++ b/create-and-cache/action.yml
@@ -45,8 +45,10 @@ runs:
       env:
         MANIFEST_PATH: ${{ inputs.manifest-path }}
       run: |
+        lock_path="pixi.lock"
         if [[ -n "$MANIFEST_PATH" ]]; then
           manifest_path="$MANIFEST_PATH"
+          lock_path="$(dirname ${manifest_path})/pixi.lock"
         elif [[ -f "pixi.toml" ]]; then
           manifest_path="pixi.toml"
         elif [[ -f "pyproject.toml" ]]; then
@@ -56,7 +58,7 @@ runs:
           exit 1
         fi
         echo "manifest-path=${manifest_path}" >> "$GITHUB_OUTPUT"
-        echo "lock-path=$(dirname "${manifest_path}")/pixi.lock" >> "$GITHUB_OUTPUT"
+        echo "lock-path=${lock_path}" >> "$GITHUB_OUTPUT"
 
     - name: Restore pixi.lock from cache
       uses: actions/cache/restore@8b402f58fbc84540c8b491a91e594a4576fec3d7 # v5.0.2

From d5183a931cf4378efd289ce8634ff35ee2d37c50 Mon Sep 17 00:00:00 2001
From: Justus Magin <keewis@posteo.de>
Date: Mon, 3 Aug 2026 23:44:12 +0200
Subject: [PATCH 14/14] rerun ci