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-rwxr-xr-xscripts/combo-layer31
1 files changed, 29 insertions, 2 deletions
diff --git a/scripts/combo-layer b/scripts/combo-layer
index a0a737d6ee..1ca2ce6c02 100755
--- a/scripts/combo-layer
+++ b/scripts/combo-layer
@@ -1266,8 +1266,35 @@ def apply_commit(parent, rev, largs, wargs, dest_dir, file_filter=None):
1266 target = os.path.join(wargs["destdir"], dest_dir) 1266 target = os.path.join(wargs["destdir"], dest_dir)
1267 if not os.path.isdir(target): 1267 if not os.path.isdir(target):
1268 os.makedirs(target) 1268 os.makedirs(target)
1269 runcmd("git archive %s %s | tar -C %s -xf -" % (rev, ' '.join([pipes.quote(x) for x in update]), pipes.quote(target)), **largs) 1269 quoted_target = pipes.quote(target)
1270 runcmd("git add -f".split() + [os.path.join(dest_dir, x) for x in update], **wargs) 1270 # os.sysconf('SC_ARG_MAX') is lying: running a command with
1271 # string length 629343 already failed with "Argument list too
1272 # long" although SC_ARG_MAX = 2097152. "man execve" explains
1273 # the limitations, but those are pretty complicated. So here
1274 # we just hard-code a fixed value which is more likely to work.
1275 max_cmdsize = 64 * 1024
1276 while update:
1277 quoted_args = []
1278 unquoted_args = []
1279 cmdsize = 100 + len(quoted_target)
1280 while update:
1281 quoted_next = pipes.quote(update[0])
1282 size_next = len(quoted_next) + len(dest_dir) + 1
1283 logger.debug('cmdline length %d + %d < %d?' % (cmdsize, size_next, os.sysconf('SC_ARG_MAX')))
1284 if cmdsize + size_next < max_cmdsize:
1285 quoted_args.append(quoted_next)
1286 unquoted_args.append(update.pop(0))
1287 cmdsize += size_next
1288 else:
1289 logger.debug('Breaking the cmdline at length %d' % cmdsize)
1290 break
1291 logger.debug('Final cmdline length %d / %d' % (cmdsize, os.sysconf('SC_ARG_MAX')))
1292 cmd = "git archive %s %s | tar -C %s -xf -" % (rev, ' '.join(quoted_args), quoted_target)
1293 logger.debug('First cmdline length %d' % len(cmd))
1294 runcmd(cmd, **largs)
1295 cmd = "git add -f".split() + [os.path.join(dest_dir, x) for x in unquoted_args]
1296 logger.debug('Second cmdline length %d' % reduce(lambda x, y: x + len(y), cmd, 0))
1297 runcmd(cmd, **wargs)
1271 if delete: 1298 if delete:
1272 for path in delete: 1299 for path in delete:
1273 if dest_dir: 1300 if dest_dir: