From 83640313223d4b6c3fe04049364f80bd158923f1 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Mon, 18 Mar 2024 21:41:16 -0500
Subject: [PATCH 01/15] [ci] raise floors on CI dependencies

---
 .ci/test.sh          | 36 ++++++++++++++++++++----------------
 .ci/test_windows.ps1 | 28 ++++++++++++++--------------
 2 files changed, 34 insertions(+), 30 deletions(-)

diff --git a/.ci/test.sh b/.ci/test.sh
index 5af6e6de4e6b..afe54428c945 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -126,25 +126,29 @@ fi
 # older versions of Dask are incompatible with pandas>=2.0, but not all conda packages' metadata accurately reflects that
 #
 # ref: https://github.com/microsoft/LightGBM/issues/6030
-CONSTRAINED_DEPENDENCIES="'dask>=2023.5.0' 'distributed>=2023.5.0' 'pandas>=2.0' python-graphviz"
+CONSTRAINED_DEPENDENCIES="'dask>=2023.5.0' 'distributed>=2023.5.0' 'pandas>=2.0' 'python-graphviz>=0.20'"
 if [[ $PYTHON_VERSION == "3.7" ]]; then
     CONSTRAINED_DEPENDENCIES="'dask' 'distributed' 'python-graphviz<0.20.2' 'pandas<2.0'"
 fi
 
-# including python=version[build=*cpython] to ensure that conda doesn't fall back to pypy
-mamba create -q -y -n $CONDA_ENV \
+# notes:
+#   * including python=version[build=*cpython] to ensure that conda doesn't fall back to pypy
+#   * these floors are not the oldest versions LightGBM supports... they're here just to make conda
+#     solves faster, and should generally be the latest versions that work for all CI jobs using
+#     this script
+mamba create -y -n $CONDA_ENV \
     ${CONSTRAINED_DEPENDENCIES} \
-    cffi \
-    cloudpickle \
-    joblib \
-    matplotlib \
-    numpy \
-    psutil \
-    pyarrow \
-    pytest \
+    'cffi>=1.16' \
+    'cloudpickle>=3.0.0' \
+    'joblib>=1.3.2' \
+    'matplotlib-base>=3.7.3' \
+    'numpy>=1.24.4' \
+    'psutil>=5.9.8' \
+    'pyarrow>=15.0' \
+    'pytest>=8.1.1' \
     ${CONDA_PYTHON_REQUIREMENT} \
-    scikit-learn \
-    scipy || exit 1
+    'scikit-learn>=1.3.2' \
+    'scipy>=1.10' || exit 1
 
 source activate $CONDA_ENV
 
@@ -310,9 +314,9 @@ matplotlib.use\(\"Agg\"\)\
     sed -i'.bak' 's/graph.render(view=True)/graph.render(view=False)/' plot_example.py
     # requirements for examples
     mamba install -q -y -n $CONDA_ENV \
-        h5py \
-        ipywidgets \
-        notebook
+        'h5py>=3.10' \
+        'ipywidgets>=8.1.2' \
+        'notebook>=7.1.2'
     for f in *.py **/*.py; do python $f || exit 1; done  # run all examples
     cd $BUILD_DIRECTORY/examples/python-guide/notebooks
     sed -i'.bak' 's/INTERACTIVE = False/assert False, \\"Interactive mode disabled\\"/' interactive_plot_example.ipynb
diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index 4219b45ccd57..e872b82c58ea 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -48,23 +48,23 @@ conda config --set always_yes yes --set changeps1 no
 # ref:
 # * https://stackoverflow.com/a/62897729/3986677
 # * https://github.com/microsoft/LightGBM/issues/5899
-conda install brotlipy
+conda install "brotlipy>=0.7"
 
 conda update -q -y conda
 conda create -q -y -n $env:CONDA_ENV `
-  cffi `
-  cloudpickle `
-  joblib `
-  matplotlib `
-  numpy `
-  pandas `
-  psutil `
-  pyarrow `
-  pytest `
+  "cffi>=1.16" `
+  "cloudpickle>=3.0" `
+  "joblib>=1.3.2" `
+  "matplotlib-base>=3.7.3" `
+  "numpy>=1.24.4" `
+  "pandas>=1.5" `
+  "psutil>=5.9.8" `
+  "pyarrow>=15.0" `
+  "pytest>=8.1.1" `
   "python=$env:PYTHON_VERSION[build=*cpython]" `
-  python-graphviz `
-  scikit-learn `
-  scipy ; Check-Output $?
+  "python-graphviz>=0.20" `
+  "scikit-learn>=1.3.2" `
+  "scipy>=1.10" ; Check-Output $?
 
 if ($env:TASK -ne "bdist") {
   conda activate $env:CONDA_ENV
@@ -126,7 +126,7 @@ if (($env:TASK -eq "regular") -or (($env:APPVEYOR -eq "true") -and ($env:TASK -e
   cd $env:BUILD_SOURCESDIRECTORY/examples/python-guide
   @("import matplotlib", "matplotlib.use('Agg')") + (Get-Content "plot_example.py") | Set-Content "plot_example.py"
   (Get-Content "plot_example.py").replace('graph.render(view=True)', 'graph.render(view=False)') | Set-Content "plot_example.py"  # prevent interactive window mode
-  conda install -q -y -n $env:CONDA_ENV "h5py>3.0" ipywidgets notebook
+  conda install -q -y -n $env:CONDA_ENV "h5py>=3.10" "ipywidgets>=8.1.2" "notebook>=7.1.2"
   foreach ($file in @(Get-ChildItem *.py)) {
     @("import sys, warnings", "warnings.showwarning = lambda message, category, filename, lineno, file=None, line=None: sys.stdout.write(warnings.formatwarning(message, category, filename, lineno, line))") + (Get-Content $file) | Set-Content $file
     python $file ; Check-Output $?

From b9a45e104801dbc4610fa7540396de09bb481f58 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Mon, 18 Mar 2024 22:00:03 -0500
Subject: [PATCH 02/15] fix matplotlib-base uninstall, relax pyarrow pin

---
 .ci/test.sh          | 8 ++++----
 .ci/test_windows.ps1 | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/.ci/test.sh b/.ci/test.sh
index afe54428c945..9b44d5df5aaa 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -74,10 +74,10 @@ if [[ $TASK == "lint" ]]; then
         ${CONDA_PYTHON_REQUIREMENT} \
         'cmakelint>=1.4.2' \
         'cpplint>=1.6.0' \
-        'matplotlib>=3.8.3' \
+        'matplotlib-base>=3.8.3' \
         'mypy>=1.8.0' \
         'pre-commit>=3.6.0' \
-        'pyarrow>=14.0' \
+        'pyarrow>=12.0' \
         'r-lintr>=3.1'
     source activate $CONDA_ENV
     echo "Linting Python code"
@@ -313,7 +313,7 @@ matplotlib.use\(\"Agg\"\)\
 ' plot_example.py  # prevent interactive window mode
     sed -i'.bak' 's/graph.render(view=True)/graph.render(view=False)/' plot_example.py
     # requirements for examples
-    mamba install -q -y -n $CONDA_ENV \
+    mamba install -y -n $CONDA_ENV \
         'h5py>=3.10' \
         'ipywidgets>=8.1.2' \
         'notebook>=7.1.2'
@@ -328,7 +328,7 @@ matplotlib.use\(\"Agg\"\)\
         dask \
         distributed \
         joblib \
-        matplotlib \
+        matplotlib-base \
         psutil \
         pyarrow \
         python-graphviz \
diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index e872b82c58ea..35e71b72a75b 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -51,7 +51,7 @@ conda config --set always_yes yes --set changeps1 no
 conda install "brotlipy>=0.7"
 
 conda update -q -y conda
-conda create -q -y -n $env:CONDA_ENV `
+conda create -y -n $env:CONDA_ENV `
   "cffi>=1.16" `
   "cloudpickle>=3.0" `
   "joblib>=1.3.2" `
@@ -59,7 +59,7 @@ conda create -q -y -n $env:CONDA_ENV `
   "numpy>=1.24.4" `
   "pandas>=1.5" `
   "psutil>=5.9.8" `
-  "pyarrow>=15.0" `
+  "pyarrow>=12.0" `
   "pytest>=8.1.1" `
   "python=$env:PYTHON_VERSION[build=*cpython]" `
   "python-graphviz>=0.20" `
@@ -126,7 +126,7 @@ if (($env:TASK -eq "regular") -or (($env:APPVEYOR -eq "true") -and ($env:TASK -e
   cd $env:BUILD_SOURCESDIRECTORY/examples/python-guide
   @("import matplotlib", "matplotlib.use('Agg')") + (Get-Content "plot_example.py") | Set-Content "plot_example.py"
   (Get-Content "plot_example.py").replace('graph.render(view=True)', 'graph.render(view=False)') | Set-Content "plot_example.py"  # prevent interactive window mode
-  conda install -q -y -n $env:CONDA_ENV "h5py>=3.10" "ipywidgets>=8.1.2" "notebook>=7.1.2"
+  conda install -y -n $env:CONDA_ENV "h5py>=3.10" "ipywidgets>=8.1.2" "notebook>=7.1.2"
   foreach ($file in @(Get-ChildItem *.py)) {
     @("import sys, warnings", "warnings.showwarning = lambda message, category, filename, lineno, file=None, line=None: sys.stdout.write(warnings.formatwarning(message, category, filename, lineno, line))") + (Get-Content $file) | Set-Content $file
     python $file ; Check-Output $?

From 4ae15d6fcd342414fbb539180e6e9c0f6edf8e75 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Wed, 20 Mar 2024 16:02:24 -0500
Subject: [PATCH 03/15] looser pyarrow floor

---
 .ci/test.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.ci/test.sh b/.ci/test.sh
index 9b44d5df5aaa..b705dd983d97 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -144,7 +144,7 @@ mamba create -y -n $CONDA_ENV \
     'matplotlib-base>=3.7.3' \
     'numpy>=1.24.4' \
     'psutil>=5.9.8' \
-    'pyarrow>=15.0' \
+    'pyarrow>=12.0' \
     'pytest>=8.1.1' \
     ${CONDA_PYTHON_REQUIREMENT} \
     'scikit-learn>=1.3.2' \

From 5b4685f6cecc955d2bbf12b351c2037ea2b6b553 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Wed, 20 Mar 2024 16:24:39 -0500
Subject: [PATCH 04/15] even looser pyarrow

---
 .ci/test.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.ci/test.sh b/.ci/test.sh
index 33cd9e35fbb6..aa38c242695c 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -75,7 +75,7 @@ if [[ $TASK == "lint" ]]; then
         'matplotlib-base>=3.8.3' \
         'mypy>=1.8.0' \
         'pre-commit>=3.6.0' \
-        'pyarrow>=12.0' \
+        'pyarrow>=6.0' \
         'r-lintr>=3.1'
     source activate $CONDA_ENV
     echo "Linting Python code"
@@ -142,7 +142,7 @@ mamba create -y -n $CONDA_ENV \
     'matplotlib-base>=3.7.3' \
     'numpy>=1.24.4' \
     'psutil>=5.9.8' \
-    'pyarrow>=12.0' \
+    'pyarrow>=6.0' \
     'pytest>=8.1.1' \
     ${CONDA_PYTHON_REQUIREMENT} \
     'scikit-learn>=1.3.2' \

From f6a8d9932868a1b366ea08d735215d10001bd717 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 21:38:07 -0500
Subject: [PATCH 05/15] add environment files

---
 .ci/conda-envs/README.md        |  0
 .ci/conda-envs/ci-core-py37.txt | 56 +++++++++++++++++++++++++++++++++
 .ci/conda-envs/ci-core.txt      | 40 +++++++++++++++++++++++
 .ci/test.sh                     | 31 ++++++------------
 .ci/test_windows.ps1            | 25 +++++++--------
 5 files changed, 117 insertions(+), 35 deletions(-)
 create mode 100644 .ci/conda-envs/README.md
 create mode 100644 .ci/conda-envs/ci-core-py37.txt
 create mode 100644 .ci/conda-envs/ci-core.txt

diff --git a/.ci/conda-envs/README.md b/.ci/conda-envs/README.md
new file mode 100644
index 000000000000..e69de29bb2d1
diff --git a/.ci/conda-envs/ci-core-py37.txt b/.ci/conda-envs/ci-core-py37.txt
new file mode 100644
index 000000000000..89b765569aa1
--- /dev/null
+++ b/.ci/conda-envs/ci-core-py37.txt
@@ -0,0 +1,56 @@
+# [description]
+#
+#   Similar to ci-core.txt, but specific to Python 3.7.
+#
+#   Unlike ci-core.txt, this includes a Python version and uses
+#   `=` and `<=` pins to make solves faster and prevent against
+#   issues like https://github.com/microsoft/LightGBM/pull/6370.
+#
+# [usage]
+#
+#   conda create \
+#     --name test-env \
+#     --file ./.ci/conda-envs/ci-core-py37.txt
+#
+
+# python
+python=3.7.12
+
+# direct imports
+cffi=1.15.*
+# older versions of Dask are incompatible with pandas>=2.0, but not all conda packages' metadata accurately reflects that
+#
+# ref: https://github.com/microsoft/LightGBM/issues/6030
+dask=2022.2.*
+distributed=2022.2.*
+joblib=1.3.*
+matplotlib-base=3.5.*
+numpy=1.21.*
+pandas=1.3.*
+pyarrow=9.0.*
+# python-graphviz 0.20.2 is not compatible with Python 3.7
+# ref: https://github.com/microsoft/LightGBM/pull/6370
+python-graphviz=0.20.1
+scikit-learn=1.0.*
+scipy=1.7.*
+
+# testing-only dependencies
+cloudpickle=2.2.*
+pluggy=1.0.*
+psutil=5.9.3
+pytest=7.4.*
+
+# other recursive dependencies, just
+# pinned here to help speed up solves
+bokeh=2.4.*
+fsspec=2023.1.*
+msgpack-python=1.0.*
+pluggy=1.0.*
+pytz=2024.1
+setuptools=59.8.*
+snappy=1.1.*
+tomli=2.0.*
+tornado=6.1.*
+wheel=0.43.*
+zict=2.2.*
+zipp=3.15.*
diff --git a/.ci/conda-envs/ci-core.txt b/.ci/conda-envs/ci-core.txt
new file mode 100644
index 000000000000..e1c88244ec28
--- /dev/null
+++ b/.ci/conda-envs/ci-core.txt
@@ -0,0 +1,40 @@
+# [description]
+#
+#   Core dependencies used across most LightGBM continuous integration (CI) jobs.
+#
+#   'python' constraint is intentionally omitted, so this file can be reused across
+#   Python versions.
+#
+#   These floors are not the oldest versions LightGBM supports... they're here just to make conda
+#   solves faster, and should generally be the latest versions that work for all CI jobs using this.
+#
+# [usage]
+#
+#   conda create \
+#     --name test-env \
+#     --file ./.ci/conda-envs/ci-core.txt \
+#     python=3.10
+#
+
+# direct imports
+conda-forge::cffi>=1.16
+dask>=2023.5.0
+joblib>=1.3.2
+matplotlib-base>=3.7.3
+numpy>=1.24.4
+pandas>2.0
+pyarrow>=6.0
+python-graphviz>=0.20.3
+scikit-learn>=1.3.2
+scipy>=1.1
+
+# testing-only dependencies
+cloudpickle>=3.0.0
+psutil>=5.9.8
+pytest>=8.1.1
+
+# other recursive dependencies, just
+# pinned here to help speed up solves
+pluggy>=1.4.0
+setuptools>=69.2
+wheel>=0.43
diff --git a/.ci/test.sh b/.ci/test.sh
index aa38c242695c..641c72a291f9 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -36,6 +36,7 @@ if [[ "$TASK" == "cpp-tests" ]]; then
     exit 0
 fi
 
+# including python=version[build=*cpython] to ensure that conda doesn't fall back to pypy
 CONDA_PYTHON_REQUIREMENT="python=$PYTHON_VERSION[build=*cpython]"
 
 if [[ $TASK == "if-else" ]]; then
@@ -121,32 +122,18 @@ if [[ $TASK == "check-docs" ]] || [[ $TASK == "check-links" ]]; then
     exit 0
 fi
 
-# older versions of Dask are incompatible with pandas>=2.0, but not all conda packages' metadata accurately reflects that
-#
-# ref: https://github.com/microsoft/LightGBM/issues/6030
-CONSTRAINED_DEPENDENCIES="'dask>=2023.5.0' 'distributed>=2023.5.0' 'pandas>=2.0' 'python-graphviz>=0.20'"
 if [[ $PYTHON_VERSION == "3.7" ]]; then
-    CONSTRAINED_DEPENDENCIES="'dask' 'distributed' 'python-graphviz<0.20.2' 'pandas<2.0'"
+    CONDA_REQUIREMENT_FILES="--file ${BUILD_DIRECTORY}/.ci/conda-envs/ci-core-py37.txt"
+else
+    CONDA_REQUIREMENT_FILES="--file ${BUILD_DIRECTORY}/.ci/conda-envs/ci-core.txt"
 fi
 
-# notes:
-#   * including python=version[build=*cpython] to ensure that conda doesn't fall back to pypy
-#   * these floors are not the oldest versions LightGBM supports... they're here just to make conda
-#     solves faster, and should generally be the latest versions that work for all CI jobs using
-#     this script
-mamba create -y -n $CONDA_ENV \
-    ${CONSTRAINED_DEPENDENCIES} \
-    'cffi>=1.16' \
-    'cloudpickle>=3.0.0' \
-    'joblib>=1.3.2' \
-    'matplotlib-base>=3.7.3' \
-    'numpy>=1.24.4' \
-    'psutil>=5.9.8' \
-    'pyarrow>=6.0' \
-    'pytest>=8.1.1' \
+mamba create \
+    -y \
+    -n $CONDA_ENV \
+    ${CONDA_REQUIREMENT_FILES} \
     ${CONDA_PYTHON_REQUIREMENT} \
-    'scikit-learn>=1.3.2' \
-    'scipy>=1.10' || exit 1
+|| exit 1
 
 source activate $CONDA_ENV
 
diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index 0ff1ff9c2d88..7ff7d75b8733 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -49,20 +49,19 @@ conda config --set always_yes yes --set changeps1 no
 conda install "brotlipy>=0.7"
 
 conda update -q -y conda
-conda create -y -n $env:CONDA_ENV `
-  "cffi>=1.16" `
-  "cloudpickle>=3.0" `
-  "joblib>=1.3.2" `
-  "matplotlib-base>=3.7.3" `
-  "numpy>=1.24.4" `
-  "pandas>=1.5" `
-  "psutil>=5.9.8" `
-  "pyarrow>=12.0" `
-  "pytest>=8.1.1" `
+
+if ($env:PYTHON_VERSION -eq "3.7") {
+  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/ci-core-py37.txt"
+} else {
+  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/ci-core.txt"
+}
+
+conda create `
+  -y  
+  -n $env:CONDA_ENV `
+  $env:CONDA_REQUIREMENT_FILES `
   "python=$env:PYTHON_VERSION[build=*cpython]" `
-  "python-graphviz>=0.20" `
-  "scikit-learn>=1.3.2" `
-  "scipy>=1.10" ; Check-Output $?
+; Check-Output $?
 
 if ($env:TASK -ne "bdist") {
   conda activate $env:CONDA_ENV

From 5828e0dbc4b496428d58e9007fc42ac3e015cf0a Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 21:51:23 -0500
Subject: [PATCH 06/15] missed backtick

---
 .ci/test_windows.ps1 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index 7ff7d75b8733..1a6c23089891 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -57,7 +57,7 @@ if ($env:PYTHON_VERSION -eq "3.7") {
 }
 
 conda create `
-  -y  
+  -y `
   -n $env:CONDA_ENV `
   $env:CONDA_REQUIREMENT_FILES `
   "python=$env:PYTHON_VERSION[build=*cpython]" `

From 30909e9f6172292bfa9675cdc349d058430c7e35 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 22:04:29 -0500
Subject: [PATCH 07/15] more powershell

---
 .ci/test_windows.ps1 | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index 1a6c23089891..50cddf11128f 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -51,17 +51,16 @@ conda install "brotlipy>=0.7"
 conda update -q -y conda
 
 if ($env:PYTHON_VERSION -eq "3.7") {
-  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/ci-core-py37.txt"
+  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core-py37.txt"
 } else {
-  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/ci-core.txt"
+  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core.txt"
 }
 
 conda create `
   -y `
   -n $env:CONDA_ENV `
   $env:CONDA_REQUIREMENT_FILES `
-  "python=$env:PYTHON_VERSION[build=*cpython]" `
-; Check-Output $?
+  "python=$env:PYTHON_VERSION[build=*cpython]" ; Check-Output $?
 
 if ($env:TASK -ne "bdist") {
   conda activate $env:CONDA_ENV

From 620daaab4649eba3f9838a2112a24adb45091907 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 22:36:18 -0500
Subject: [PATCH 08/15] how does powershell work

---
 .ci/test_windows.ps1 | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.ci/test_windows.ps1 b/.ci/test_windows.ps1
index 50cddf11128f..61ef1ae0f2a1 100644
--- a/.ci/test_windows.ps1
+++ b/.ci/test_windows.ps1
@@ -51,15 +51,15 @@ conda install "brotlipy>=0.7"
 conda update -q -y conda
 
 if ($env:PYTHON_VERSION -eq "3.7") {
-  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core-py37.txt"
+  $env:CONDA_REQUIREMENT_FILE = "$env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core-py37.txt"
 } else {
-  $env:CONDA_REQUIREMENT_FILES = "--file $env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core.txt"
+  $env:CONDA_REQUIREMENT_FILE = "$env:BUILD_SOURCESDIRECTORY/.ci/conda-envs/ci-core.txt"
 }
 
 conda create `
   -y `
   -n $env:CONDA_ENV `
-  $env:CONDA_REQUIREMENT_FILES `
+  --file $env:CONDA_REQUIREMENT_FILE `
   "python=$env:PYTHON_VERSION[build=*cpython]" ; Check-Output $?
 
 if ($env:TASK -ne "bdist") {

From 2d45f71361700f2bd40063db14adf8cc57e61db5 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 22:48:44 -0500
Subject: [PATCH 09/15] remove channel specifier

---
 .ci/conda-envs/ci-core.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.ci/conda-envs/ci-core.txt b/.ci/conda-envs/ci-core.txt
index e1c88244ec28..ef04e4df2b3a 100644
--- a/.ci/conda-envs/ci-core.txt
+++ b/.ci/conda-envs/ci-core.txt
@@ -17,7 +17,7 @@
 #
 
 # direct imports
-conda-forge::cffi>=1.16
+cffi>=1.16
 dask>=2023.5.0
 joblib>=1.3.2
 matplotlib-base>=3.7.3

From 9d1da9af21c1fc44a737b31bd8becd7accb78470 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Thu, 21 Mar 2024 23:45:29 -0500
Subject: [PATCH 10/15] add README

---
 .ci/conda-envs/README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/.ci/conda-envs/README.md b/.ci/conda-envs/README.md
index e69de29bb2d1..4666f96fe954 100644
--- a/.ci/conda-envs/README.md
+++ b/.ci/conda-envs/README.md
@@ -0,0 +1,11 @@
+# conda-envs
+
+This directory contains files used to create `conda` environments for development
+and testing of LightGBM.
+
+The `.txt` files here are intended to be used with `conda create --file`.
+
+For details on that, see the `conda` docs:
+
+* `conda create` docs ([link](https://conda.io/projects/conda/en/latest/commands/create.html))
+* "Managing Environments" ([link](https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html))

From 730247d3a44c3ff417b223669367c1d2ef1e5481 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Sun, 14 Apr 2024 22:56:26 -0500
Subject: [PATCH 11/15] use bash task type

---
 .vsts-ci.yml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index bfb17ddeedcb..f906613e47e0 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -68,8 +68,10 @@ jobs:
   - script: |
       echo '$(Build.SourceVersion)' > '$(Build.ArtifactStagingDirectory)/commit.txt'
     displayName: 'Add commit hash to artifacts archive'
-  - bash: $(Build.SourcesDirectory)/.ci/setup.sh
+  - task: Bash@3
     displayName: Setup
+    inputs:
+      fileType: $(Build.SourcesDirectory)/.ci/setup.sh
   - bash: $(Build.SourcesDirectory)/.ci/test.sh
     displayName: Test
   - task: PublishBuildArtifacts@1

From ff7fb3b89567c9d4979c998c5dcd49280788afd4 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Sun, 14 Apr 2024 23:00:30 -0500
Subject: [PATCH 12/15] filePath not fileType

---
 .vsts-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index f906613e47e0..8d54321c5518 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -71,7 +71,7 @@ jobs:
   - task: Bash@3
     displayName: Setup
     inputs:
-      fileType: $(Build.SourcesDirectory)/.ci/setup.sh
+      filePath: $(Build.SourcesDirectory)/.ci/setup.sh
   - bash: $(Build.SourcesDirectory)/.ci/test.sh
     displayName: Test
   - task: PublishBuildArtifacts@1

From 95fff254fbcba74a3517834095cfbd1ccbe4f1b5 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Sun, 14 Apr 2024 23:03:02 -0500
Subject: [PATCH 13/15] Revert "filePath not fileType"

This reverts commit ff7fb3b89567c9d4979c998c5dcd49280788afd4.
---
 .vsts-ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index 8d54321c5518..f906613e47e0 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -71,7 +71,7 @@ jobs:
   - task: Bash@3
     displayName: Setup
     inputs:
-      filePath: $(Build.SourcesDirectory)/.ci/setup.sh
+      fileType: $(Build.SourcesDirectory)/.ci/setup.sh
   - bash: $(Build.SourcesDirectory)/.ci/test.sh
     displayName: Test
   - task: PublishBuildArtifacts@1

From bfcf254dce408be13cef026ee75896ef0ff8a6d1 Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Sun, 14 Apr 2024 23:03:10 -0500
Subject: [PATCH 14/15] Revert "use bash task type"

This reverts commit 730247d3a44c3ff417b223669367c1d2ef1e5481.
---
 .vsts-ci.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index f906613e47e0..bfb17ddeedcb 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -68,10 +68,8 @@ jobs:
   - script: |
       echo '$(Build.SourceVersion)' > '$(Build.ArtifactStagingDirectory)/commit.txt'
     displayName: 'Add commit hash to artifacts archive'
-  - task: Bash@3
+  - bash: $(Build.SourcesDirectory)/.ci/setup.sh
     displayName: Setup
-    inputs:
-      fileType: $(Build.SourcesDirectory)/.ci/setup.sh
   - bash: $(Build.SourcesDirectory)/.ci/test.sh
     displayName: Test
   - task: PublishBuildArtifacts@1

From fc9679c61f8c93ae88d42fd065153b4b4b3e0b1c Mon Sep 17 00:00:00 2001
From: James Lamb <jaylamb20@gmail.com>
Date: Mon, 22 Apr 2024 22:33:30 -0500
Subject: [PATCH 15/15] older wheel, less strict Python 3.7

---
 .ci/conda-envs/ci-core-py37.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.ci/conda-envs/ci-core-py37.txt b/.ci/conda-envs/ci-core-py37.txt
index 89b765569aa1..b38a06a5a5c5 100644
--- a/.ci/conda-envs/ci-core-py37.txt
+++ b/.ci/conda-envs/ci-core-py37.txt
@@ -14,7 +14,7 @@
 #
 
 # python
-python=3.7.12
+python=3.7.*
 
 # direct imports
 cffi=1.15.*
@@ -51,6 +51,6 @@ setuptools=59.8.*
 snappy=1.1.*
 tomli=2.0.*
 tornado=6.1.*
-wheel=0.43.*
+wheel=0.42.*
 zict=2.2.*
 zipp=3.15.*