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Add "--force-reinstall" and a comment as to why to our "pip install" lines

This commit is contained in:
Tianon Gravi 2016-08-19 09:25:00 -07:00
parent ed91879907
commit 855b85c830
24 changed files with 138 additions and 24 deletions
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7
2.7/Dockerfile
View File

@ -47,7 +47,12 @@ RUN set -ex \
&& wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
&& python2 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
&& pip install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
2.7/alpine/Dockerfile
View File

@ -64,7 +64,12 @@ RUN set -ex \
&& wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
&& python2 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
&& pip install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
2.7/slim/Dockerfile
View File

@ -60,7 +60,12 @@ RUN set -ex \
&& wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
&& python2 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
&& pip install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
2.7/wheezy/Dockerfile
View File

@ -47,7 +47,12 @@ RUN set -ex \
&& wget -O /tmp/get-pip.py 'https://bootstrap.pypa.io/get-pip.py' \
&& python2 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
&& pip install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.3/Dockerfile
View File

@ -56,7 +56,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.3/alpine/Dockerfile
View File

@ -73,7 +73,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.3/slim/Dockerfile
View File

@ -69,7 +69,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.3/wheezy/Dockerfile
View File

@ -56,7 +56,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.4/Dockerfile
View File

@ -56,7 +56,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.4/alpine/Dockerfile
View File

@ -73,7 +73,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.4/slim/Dockerfile
View File

@ -69,7 +69,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.4/wheezy/Dockerfile
View File

@ -56,7 +56,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.5/Dockerfile
View File

@ -56,7 +56,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.5/alpine/Dockerfile
View File

@ -73,7 +73,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.5/slim/Dockerfile
View File

@ -69,7 +69,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

5
3.5/windows/windowsservercore/Dockerfile
View File

@ -42,7 +42,10 @@ RUN $url = ('https://www.python.org/ftp/python/{0}/python-{1}-amd64.exe' -f $env
\
$pipInstall = ('pip=={0}' -f $env:PYTHON_PIP_VERSION); \
Write-Host ('Installing {0} ...' -f $pipInstall); \
pip install --no-cache-dir --upgrade $pipInstall; \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
pip install --no-cache-dir --upgrade --force-reinstall $pipInstall; \
\
Write-Host 'Verifying pip install ...'; \
pip --version; \

7
3.6/Dockerfile
View File

@ -50,7 +50,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.6/alpine/Dockerfile
View File

@ -67,7 +67,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
3.6/slim/Dockerfile
View File

@ -63,7 +63,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

5
3.6/windows/windowsservercore/Dockerfile
View File

@ -36,7 +36,10 @@ RUN $url = ('https://www.python.org/ftp/python/{0}/python-{1}-amd64.exe' -f $env
\
$pipInstall = ('pip=={0}' -f $env:PYTHON_PIP_VERSION); \
Write-Host ('Installing {0} ...' -f $pipInstall); \
pip install --no-cache-dir --upgrade $pipInstall; \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
pip install --no-cache-dir --upgrade --force-reinstall $pipInstall; \
\
Write-Host 'Verifying pip install ...'; \
pip --version; \

7
Dockerfile-alpine.template
View File

@ -67,7 +67,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
Dockerfile-debian.template
View File

@ -50,7 +50,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

7
Dockerfile-slim.template
View File

@ -63,7 +63,12 @@ RUN set -ex \
&& python3 /tmp/get-pip.py "pip==$PYTHON_PIP_VERSION" \
&& rm /tmp/get-pip.py \
; fi \
&& pip3 install --no-cache-dir --upgrade "pip==$PYTHON_PIP_VERSION" \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
&& pip3 install --no-cache-dir --upgrade --force-reinstall "pip==$PYTHON_PIP_VERSION" \
# then we use "pip list" to ensure we don't have more than one pip version installed
# https://github.com/docker-library/python/pull/100
&& [ "$(pip list |tac|tac| awk -F '[ ()]+' '$1 == "pip" { print $2; exit }')" = "$PYTHON_PIP_VERSION" ] \
\
&& find /usr/local -depth \

5
Dockerfile-windowsservercore.template
View File

@ -36,7 +36,10 @@ RUN $url = ('https://www.python.org/ftp/python/{0}/python-{1}-amd64.exe' -f $env
\
$pipInstall = ('pip=={0}' -f $env:PYTHON_PIP_VERSION); \
Write-Host ('Installing {0} ...' -f $pipInstall); \
pip install --no-cache-dir --upgrade $pipInstall; \
# we use "--force-reinstall" for the case where the version of pip we're trying to install is the same as the version bundled with Python
# ("Requirement already up-to-date: pip==8.1.2 in /usr/local/lib/python3.6/site-packages")
# https://github.com/docker-library/python/pull/143#issuecomment-241032683
pip install --no-cache-dir --upgrade --force-reinstall $pipInstall; \
\
Write-Host 'Verifying pip install ...'; \
pip --version; \