path: root/meta/classes/externalsrc.bbclass
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authorQuentin Schulz <>2019-09-19 14:55:14 (GMT)
committerRichard Purdie <>2019-09-19 19:30:35 (GMT)
commit9daa97bea87a33f1a890378e1686bcec779cad80 (patch)
treed81431c70f19425e0f386f4e59f2d24560fb6e62 /meta/classes/externalsrc.bbclass
parentdb5f08c16eff01f3af0b99119c09f68628e2331d (diff)
externalsrc: stop rebuilds of 2+ externalsrc recipes sharing the same git repo
externalsrc do_configure task watches oe-devtool-tree-sha1 file and its checksum. That file basically contains the result of `git add -A ${EXTERNALSRC} && git write-tree` which is the hash of temporary "commit" of the non committed changes. This file is stored in the .git directory of the git repo of the externalsrc recipe. do_configure then depends on the checksum of oe-devtool-tree-sha1 file. If 2+ recipes with different externalsrc paths but same git repo (e.g. one recipe at /some/path and the other at /some/path/subdir) are parsed, this oe-devtool-tree-sha1 will be overwritten by those recipes at parsing time since .git is shared between those recipes. If there is one non committed git change in /some/path but not in /some/path/subdir, the oe-devtool-tree-sha1 of both recipes will be different. What will happen is that recipe1 will watch over the oe-devtool-tree-sha1 with a specific checksum, fill in file-checksums for do_configure correctly, then recipe2 will watch over the identically named file with different content also fill in the file-checksums varflag. When do_configure of recipe1 will be evaluated for re-execution, oe-devtool-tree-sha1 will be of the value of what is watched over by recipe2, thus triggering a rebuild of recipe1. This behavior is not always reproducible which I'm guessing is due to a small window between recipe1 putting info into oe-devtool-tree-sha1 and calculating the checksum of that file and recipe2 putting its content into oe-devtool-tree-sha1. By appending the name of the recipe to oe-devtool-tree-sha1, we make sure that a recipe won't have its oe-devtool-tree-sha1 overwritten by another recipe sharing the same externalsrc git repo. (From OE-Core rev: 1b727dd7295a7a7fe17800f8038242efbf7fe2b7) Signed-off-by: Quentin Schulz <> Signed-off-by: Richard Purdie <>
Diffstat (limited to 'meta/classes/externalsrc.bbclass')
1 files changed, 1 insertions, 1 deletions
diff --git a/meta/classes/externalsrc.bbclass b/meta/classes/externalsrc.bbclass
index 3618b99..ea59d02 100644
--- a/meta/classes/externalsrc.bbclass
+++ b/meta/classes/externalsrc.bbclass
@@ -203,7 +203,7 @@ def srctree_hash_files(d, srcdir=None):
203 203
204 ret = " " 204 ret = " "
205 if git_dir is not None: 205 if git_dir is not None:
206 oe_hash_file = os.path.join(git_dir, 'oe-devtool-tree-sha1') 206 oe_hash_file = os.path.join(git_dir, 'oe-devtool-tree-sha1-%s' % d.getVar('PN'))
207 with tempfile.NamedTemporaryFile(prefix='oe-devtool-index') as tmp_index: 207 with tempfile.NamedTemporaryFile(prefix='oe-devtool-index') as tmp_index:
208 # Clone index 208 # Clone index
209 shutil.copyfile(os.path.join(git_dir, 'index'), 209 shutil.copyfile(os.path.join(git_dir, 'index'),