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Keep old behavior of setuptools for editable installs

In the 25.0.0 release [1] of setuptools during any install
operation the package in not overwritten. If a package is
installed from another requirement via pip and then it is
installed again from git, it is not updated causing
check_libs_from_git to fail.

[1] https://setuptools.readthedocs.io/en/latest/history.html#v25-0-0

Change-Id: Ibaa1d4157816ea649f4452756fbde25951347001
Closes-Bug: #1605998
(cherry picked from commit 88ccd47c88dc39b8d746afae89dea31d46558a68)

Spyros Trigazis authored on 2016/07/25 05:13:57
Showing 1 changed files
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@@ -148,11 +148,15 @@ function pip_install {
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     fi
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     $xtrace
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+    # adding SETUPTOOLS_SYS_PATH_TECHNIQUE is a workaround to keep
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+    # the same behaviour of setuptools before version 25.0.0.
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+    # related issue: https://github.com/pypa/pip/issues/3874
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     $sudo_pip \
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         http_proxy="${http_proxy:-}" \
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         https_proxy="${https_proxy:-}" \
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         no_proxy="${no_proxy:-}" \
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         PIP_FIND_LINKS=$PIP_FIND_LINKS \
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+        SETUPTOOLS_SYS_PATH_TECHNIQUE=rewrite \
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         $cmd_pip $upgrade \
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         $@
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     result=$?