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| author | Mathieu Bridon <bochecha@daitauha.fr> | 2017-09-26 19:39:41 +0200 |
|---|---|---|
| committer | Mathieu Bridon <bochecha@daitauha.fr> | 2017-09-29 13:30:05 +0200 |
| commit | 4a29f7eb2c53cd3d06038d3cbb44d1ce835de647 (patch) | |
| tree | bb3375debca7fd2da0af6b23ae4a2767483e697e | |
| parent | e8beece45b7de0ee0de4db2254a4e40b44bc8b58 (diff) | |
| download | buildstream-fix-pyc-timestamps.tar.gz | |
Fix timestamps in Python bytecodefix-pyc-timestamps
When building Python modules, a bytecode `.pyc` file is generated from
the source `.py` file.
The former contains 4 bytes representing the timestamp of the latter at
the time it was generated.
Unfortunately, after building OSTree sets all the file timestamps to 0,
which introduces a discrepency between the timestamp of the `.py` file
and the 4 bytes stored inside the `.pyc` file.
As a result, when running a Python module from a checkout, Python thinks
the bytecode files are stale, which causes a dramatic performance
penalty when starting an application.
Fixes #94
| -rw-r--r-- | buildstream/data/projectconfig.yaml | 5 | ||||
| -rw-r--r-- | buildstream/plugins/elements/distutils.yaml | 2 | ||||
| -rw-r--r-- | buildstream/plugins/elements/pip.yaml | 2 |
3 files changed, 9 insertions, 0 deletions
diff --git a/buildstream/data/projectconfig.yaml b/buildstream/data/projectconfig.yaml index 6406f1609..2e47aa87b 100644 --- a/buildstream/data/projectconfig.yaml +++ b/buildstream/data/projectconfig.yaml @@ -120,6 +120,11 @@ variables: strip --remove-section=.comment --remove-section=.note --strip-unneeded "$1" objcopy --add-gnu-debuglink "$debugfile" "$1"' - {} ';' + fix-pyc-timestamps: | + + find "%{install-root}" -name '*.pyc' \ + -exec dd if=/dev/zero of={} bs=1 count=4 seek=4 conv=notrunc ';' + # Base sandbox environment, can be overridden by plugins environment: diff --git a/buildstream/plugins/elements/distutils.yaml b/buildstream/plugins/elements/distutils.yaml index 3a8b119fc..7cb6f3a8d 100644 --- a/buildstream/plugins/elements/distutils.yaml +++ b/buildstream/plugins/elements/distutils.yaml @@ -45,3 +45,5 @@ config: strip-commands: - | %{strip-binaries} + - | + %{fix-pyc-timestamps} diff --git a/buildstream/plugins/elements/pip.yaml b/buildstream/plugins/elements/pip.yaml index 797c608a1..19a226e00 100644 --- a/buildstream/plugins/elements/pip.yaml +++ b/buildstream/plugins/elements/pip.yaml @@ -22,3 +22,5 @@ config: strip-commands: - | %{strip-binaries} + - | + %{fix-pyc-timestamps} |