diff options
-rw-r--r-- | doc/bitbake-user-manual/bitbake-user-manual-metadata.xml | 44 |
1 files changed, 32 insertions, 12 deletions
diff --git a/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml b/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml index 53e182ba6..40f4829e6 100644 --- a/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml +++ b/doc/bitbake-user-manual/bitbake-user-manual-metadata.xml @@ -2317,7 +2317,8 @@ <row> <entry align="left"><filename>d.getVar("X", expand)</filename></entry> <entry align="left">Returns the value of variable "X". - Using "expand=True" expands the value.</entry> + Using "expand=True" expands the value. + Returns "None" if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.setVar("X", "value")</filename></entry> @@ -2325,24 +2326,32 @@ </row> <row> <entry align="left"><filename>d.appendVar("X", "value")</filename></entry> - <entry align="left">Adds "value" to the end of the variable "X".</entry> + <entry align="left">Adds "value" to the end of the variable "X". + Acts like <filename>d.setVar("X", "value")</filename> + if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.prependVar("X", "value")</filename></entry> - <entry align="left">Adds "value" to the start of the variable "X".</entry> + <entry align="left">Adds "value" to the start of the variable "X". + Acts like <filename>d.setVar("X", "value")</filename> + if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.delVar("X")</filename></entry> - <entry align="left">Deletes the variable "X" from the datastore.</entry> + <entry align="left">Deletes the variable "X" from the datastore. + Does nothing if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.renameVar("X", "Y")</filename></entry> - <entry align="left">Renames the variable "X" to "Y".</entry> + <entry align="left">Renames the variable "X" to "Y". + Does nothing if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.getVarFlag("X", flag, expand)</filename></entry> <entry align="left">Returns the value of variable "X". - Using "expand=True" expands the value.</entry> + Using "expand=True" expands the value. + Returns "None" if either the variable "X" or the named flag + does not exist.</entry> </row> <row> <entry align="left"><filename>d.setVarFlag("X", flag, "value")</filename></entry> @@ -2351,12 +2360,16 @@ <row> <entry align="left"><filename>d.appendVarFlag("X", flag, "value")</filename></entry> <entry align="left">Appends "value" to the named flag on the - variable "X".</entry> + variable "X". + Acts like <filename>d.setVarFlag("X", flag, "value")</filename> + if the named flag does not exist.</entry> </row> <row> <entry align="left"><filename>d.prependVarFlag("X", flag, "value")</filename></entry> <entry align="left">Prepends "value" to the named flag on - the variable "X".</entry> + the variable "X". + Acts like <filename>d.setVarFlag("X", flag, "value")</filename> + if the named flag does not exist.</entry> </row> <row> <entry align="left"><filename>d.delVarFlag("X", flag)</filename></entry> @@ -2372,16 +2385,23 @@ </row> <row> <entry align="left"><filename>d.getVarFlags("X")</filename></entry> - <entry align="left">Returns a <filename>flagsdict</filename> of the flags for - the variable "X".</entry> + <entry align="left">Returns a <filename>flagsdict</filename> + of the flags for the variable "X". + Returns "None" if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.delVarFlags("X")</filename></entry> - <entry align="left">Deletes all the flags for the variable "X".</entry> + <entry align="left">Deletes all the flags for the variable "X". + Does nothing if the variable "X" does not exist.</entry> </row> <row> <entry align="left"><filename>d.expand(expression)</filename></entry> - <entry align="left">Expands variable references in the specified string expression.</entry> + <entry align="left">Expands variable references in the specified + string expression. + References to variables that do not exist are left as is. + For example, <filename>d.expand("foo ${X}")</filename> + expands to the literal string "foo ${X}" if the + variable "X" does not exist.</entry> </row> </tbody> </tgroup> |